def __init__(self, config=None, db_name="GratefulDeadConcerts"):
# This makes is easy to test different DBs
#uri = self._get_uri(db_name) or self.default_uri
self.configs = dict()
self.request = dict()
self.type_system = JSONTypeSystem()
self.db_name = db_name
for command in ['database', 'command']:
uri = "%s/%s/%s" % (self.default_uri.rstrip("/"), command, db_name)
print(uri)
config = Config(uri, username="******", password="******")
self.configs[command] = config
self.registry = Registry(config)
self.request[command] = self.request_class(
config,
self.type_system.content_type)
self.config = self.configs['database']
# OrientDB supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts(self.config)
# Also include the OrientDB-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts
# namespace.
self.registry.add_scripts("gremlin", self.scripts)
def __init__(self, config=None):
self.config = config or Config(self.default_uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config,
self.type_system.content_type)
# Neo4j supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts(self.config)
# Also include the Neo4j Server-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
def __init__(self,config):
self.config = config
self.registry = Registry(config)
self.scripts = GroovyScripts()
self.scripts.update(self._get_scripts_file("gremlin.groovy"))
self.registry.add_scripts("gremlin",self.scripts)
self.type_system = JSONTypeSystem()
self.request = RexsterRequest(config,self.type_system.content_type)
def __init__(self, config=None, db_name=None):
# This makes is easy to test different DBs
uri = self._get_uri(db_name) or self.default_uri
self.config = config or Config(uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config,
self.type_system.content_type)
# Rexster supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts(self.config)
# Also include the Rexster-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
def __init__(self, config):
"""
Initializes a resource object.
:param root_uri: the base URL of Rexster.
"""
self.config = config
self.registry = Registry(config)
self.scripts = Scripts()
dir_name = os.path.dirname(__file__)
self.scripts.override(get_file_path(dir_name, "gremlin.groovy"))
self.registry.add_scripts("gremlin", self.scripts)
self.type_system = self._get_type_system()
self.request = Neo4jRequest(config, self.type_system.content_type)
def __init__(self,config):
"""
Initializes a resource object.
:param root_uri: the base URL of Rexster.
"""
self.config = config
self.registry = Registry(config)
self.scripts = Scripts()
dir_name = os.path.dirname(__file__)
self.scripts.override(get_file_path(dir_name,"gremlin.groovy"))
self.registry.add_scripts("gremlin",self.scripts)
self.type_system = self._get_type_system()
self.request = Neo4jRequest(config,self.type_system.content_type)
def __init__(self, config=None):
self.config = config or Config(self.default_uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config, self.type_system.content_type)
# Neo4j supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts()
# Also include the Neo4j Server-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
def __init__(self, config=None, db_name=None):
# This makes is easy to test different DBs
uri = self._get_uri(db_name) or self.default_uri
self.config = config or Config(uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config, self.type_system.content_type)
# Rexster supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts()
# Also include the Rexster-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
class RexsterClient(Client):
"""
Low-level client that sends a request to Rexster and returns a response.
:param config: Optional Config object. Defaults to default Config.
:type config: bulbs.config.Config
:cvar default_uri: Default URI for the database.
:cvar request_class: Request class for the Client.
:ivar config: Config object.
:ivar registry: Registry object.
:ivar scripts: GroovyScripts object.
:ivar type_system: JSONTypeSystem object.
:ivar request: RexsterRequest object.
Example:
>>> from bulbs.rexster import RexsterClient
>>> client = RexsterClient()
>>> script = client.scripts.get("get_vertices")
>>> response = client.gremlin(script, params=None)
>>> result = response.results.next()
"""
#: Default URI for the database.
default_uri = REXSTER_URI
request_class = RexsterRequest
def __init__(self, config=None, db_name=None):
# This makes is easy to test different DBs
uri = self._get_uri(db_name) or self.default_uri
self.config = config or Config(uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config, self.type_system.content_type)
# Rexster supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts()
# Also include the Rexster-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
def _get_uri(self, db_name):
if db_name is not None:
uri = "http://localhost:8182/graphs/%s" % db_name
return uri
# Gremlin
def gremlin(self, script, params=None):
"""
Executes a Gremlin script and returns the Response.
:param script: Gremlin script to execute.
:type script: str
:param params: Param bindings for the script.
:type params: dict
:rtype: RexsterResponse
"""
params = dict(script=script, params=params)
return self.request.post(gremlin_path, params)
# Vertex Proxy
def create_vertex(self, data):
"""
Creates a vertex and returns the Response.
:param data: Property data.
:type data: dict
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
return self.request.post(vertex_path, data)
def get_vertex(self, _id):
"""
Gets the vertex with the _id and returns the Response.
:param data: Vertex ID.
:type data: int
:rtype: RexsterResponse
"""
path = build_path(vertex_path, _id)
return self.request.get(path, params=None)
def get_all_vertices(self):
"""
Returns a Response containing all the vertices in the Graph.
:rtype: RexsterResponse
"""
script = self.scripts.get("get_vertices")
params = None
return self.gremlin(script, params)
def update_vertex(self, _id, data):
"""
Updates the vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
path = build_path(vertex_path, _id)
return self.request.put(path, data)
def delete_vertex(self, _id):
"""
Deletes a vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:rtype: RexsterResponse
"""
path = build_path(vertex_path, _id)
return self.request.delete(path, params=None)
# Edge Proxy
def create_edge(self, outV, label, inV, data={}):
"""
Creates a edge and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict or None
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
edge_data = dict(_outV=outV, _label=label, _inV=inV)
data.update(edge_data)
return self.request.post(edge_path, data)
def get_edge(self, _id):
"""
Gets the edge with the _id and returns the Response.
:param data: Edge ID.
:type data: int
:rtype: RexsterResponse
"""
path = build_path(edge_path, _id)
return self.request.get(path, params=None)
def get_all_edges(self):
"""
Returns a Response containing all the edges in the Graph.
:rtype: RexsterResponse
"""
script = self.scripts.get("get_edges")
params = None
return self.gremlin(script, params)
def update_edge(self, _id, data):
"""
Updates the edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
path = build_path(edge_path, _id)
return self.request.put(path, data)
def delete_edge(self, _id):
"""
Deletes a edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:rtype: RexsterResponse
"""
path = build_path(edge_path, _id)
return self.request.delete(path, params=None)
# Vertex Container
def outE(self, _id, label=None, start=None, limit=None):
"""
Returns the outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get("outE")
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def inE(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get("inE")
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def bothE(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming and outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get("bothE")
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def outV(self, _id, label=None, start=None, limit=None):
"""
Returns the out-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get("outV")
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def inV(self, _id, label=None, start=None, limit=None):
"""
Returns the in-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get("inV")
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def bothV(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming- and outgoing-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get("bothV")
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
# Index Proxy - General
def get_all_indices(self):
"""Returns a list of all the element indices."""
return self.request.get(index_path, params=None)
def get_index(self, name):
path = build_path(index_path, name)
return self.request.get(path, params=None)
def delete_index(self, name):
"""Deletes the index with the index_name."""
path = build_path(index_path, name)
return self.request.delete(path, params=None)
# Index Proxy - Vertex
def create_vertex_index(self, index_name, *args, **kwds):
"""
Creates a vertex index with the specified params.
:param index_name: Name of the index to create.
:type index_name: str
:rtype: RexsterResponse
"""
path = build_path(index_path, index_name)
index_type = kwds.get("index_type", "manual")
index_keys = kwds.get("index_keys", None)
params = {"class": "vertex", "type": index_type}
if index_keys:
params.update({"keys": index_keys})
return self.request.post(path, params)
def get_vertex_index(self, index_name):
"""
Returns the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
return self.get_index(index_name)
def get_or_create_vertex_index(self, index_name, index_params=None):
script = self.scripts.get("get_or_create_vertex_index")
params = dict(index_name=index_name, index_params=index_params)
resp = self.gremlin(script, params)
# assert "MANUAL" in resp.content['results'][0]
result = {"name": index_name, "type": "manual", "class": "vertex"}
resp.results = RexsterResult(result, self.config)
return resp
def delete_vertex_index(self, name):
"""
Deletes the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
return self.delete_index(name)
# Index Proxy - Edge
def create_edge_index(self, name, *args, **kwds):
"""
Creates a edge index with the specified params.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
path = build_path(index_path, name)
index_type = kwds.get("index_type", "manual")
index_keys = kwds.get("index_keys", None)
params = {"class": "edge", "type": index_type}
if index_keys:
params.update({"keys": index_keys})
return self.request.post(path, params)
def get_edge_index(self, name):
"""
Returns the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
return self.get_index(name)
def get_or_create_edge_index(self, index_name, index_params=None):
script = self.scripts.get("get_or_create_edge_index")
params = dict(index_name=index_name, index_params=index_params)
resp = self.gremlin(script, params)
# assert "MANUAL" in resp.content['results'][0]
result = {"name": index_name, "type": "manual", "class": "edge"}
resp.results = RexsterResult(result, self.config)
return resp
def delete_edge_index(self, name):
"""
Deletes the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
self.delete_index(name)
# def create_automatic_vertex_index(self,index_name,element_class,keys=None):
# keys = json.dumps(keys) if keys else "null"
# params = dict(index_name=index_name,element_class=element_class,keys=keys)
# script = self.scripts.get('create_automatic_vertex_index',params)
# return self.gremlin(script)
# def create_indexed_vertex_automatic(self,data,index_name):
# data = json.dumps(data)
# params = dict(data=data,index_name=index_name)
# script = self.scripts.get('create_automatic_indexed_vertex',params)
# return self.gremlin(script)
# Index Container - General
def index_count(self, index_name, key, value):
path = build_path(index_path, index_name, "count")
params = dict(key=key, value=value)
return self.request.get(path, params)
def index_keys(self, index_name):
path = build_path(index_path, index_name, "keys")
return self.request.get(path, params=None)
# Index Container - Vertex
def put_vertex(self, index_name, key, value, _id):
"""
Adds a vertex to the index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Vertex ID
:type _id: int
:rtype: RexsterResponse
"""
# Rexster's API only supports string lookups so convert value to a string
path = build_path(index_path, index_name)
params = {"key": key, "value": str(value), "class": "vertex", "id": _id}
return self.request.put(path, params)
def lookup_vertex(self, index_index_name, key, value):
"""
Returns the vertices indexed with the key and value.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: RexsterResponse
"""
path = build_path(index_path, index_index_name)
params = dict(key=key, value=value)
return self.request.get(path, params)
def query_vertex(self, index_name, params):
"""Queries for an edge in the index and returns the Response."""
path = build_path(index_path, index_name)
return self.request.get(path, params)
def remove_vertex(self, index_name, _id, key=None, value=None):
"""
Removes a vertex from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: RexsterResponse
"""
# Can Rexster have None for key and value?
path = build_path(index_path, index_name)
params = {"key": key, "value": value, "class": "vertex", "id": _id}
return self.request.delete(path, params)
# Index Container - Edge
def put_edge(self, index_name, key, value, _id):
"""
Adds an edge to the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Edge ID
:type _id: int
:rtype: RexsterResponse
"""
# Rexster's API only supports string lookups so convert value to a string
path = build_path(index_path, index_name)
params = {"key": key, "value": str(value), "class": "edge", "id": _id}
return self.request.put(path, params)
def lookup_edge(self, index_index_name, key, value):
"""
Looks up an edge in the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: RexsterResponse
"""
path = build_path(index_path, index_index_name)
params = dict(key=key, value=value)
return self.request.get(path, params)
def query_edge(self, index_name, params):
"""Queries for an edge in the index and returns the Response."""
path = build_path(index_path, index_name)
return self.request.get(path, params)
def remove_edge(self, index_name, _id, key=None, value=None):
"""
Removes an edge from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param _id: Edge ID
:type _id: int
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: RexsterResponse
"""
# Can Rexster have None for key and value?
path = build_path(index_path, index_name)
params = {"key": key, "value": value, "class": "edge", "id": _id}
return self.request.delete(path, params)
# Model Proxy - Vertex
def create_indexed_vertex(self, data, index_name, keys=None):
"""
Creates a vertex, indexes it, and returns the Response.
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
params = dict(data=data, index_name=index_name, keys=keys)
script = self.scripts.get("create_indexed_vertex")
return self.gremlin(script, params)
def update_indexed_vertex(self, _id, data, index_name, keys=None):
"""
Updates an indexed vertex and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script, params)
# Model Proxy - Edge
def create_indexed_edge(self, outV, label, inV, data, index_name, keys=None):
"""
Creates a edge, indexes it, and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
edge_params = dict(outV=outV, label=label, inV=inV, label_var=self.config.label_var)
params = dict(data=data, index_name=index_name, keys=keys)
params.update(edge_params)
script = self.scripts.get("create_indexed_edge")
return self.gremlin(script, params)
def update_indexed_edge(self, _id, data, index_name, keys=None):
"""
Updates an indexed edge and returns the Response.
:param _id: Edge ID.
:type _id: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script, params)
# Utils
def warm_cache(self):
"""Warms the server cache by loading elements into memory."""
script = self.scripts.get("warm_cache")
return self.gremlin(script, params=None)
# Rexster Specific Stuff
def rebuild_vertex_index(self, index_name):
params = dict(index_name=index_name)
script = self.scripts.get("rebuild_vertex_index", params)
return self.gremlin(script)
def rebuild_edge_index(self, index_name):
params = dict(index_name=index_name)
script = self.scripts.get("rebuild_edge_index", params)
return self.gremlin(script)
# TODO: manual/custom index API
def multi_get_vertices(self, id_list):
path = build_path(multi_get_path, "vertices")
idList = self._build_url_list(id_list)
params = dict(idList=idList)
return self.request.get(path, params)
def multi_get_edges(self, id_list):
path = build_path(multi_get_path, "edges")
idList = self._build_url_list(id_list)
params = dict(idList=idList)
return self.request.get(path, params)
def _build_url_list(self, items):
items = [str(item) for item in items]
url_list = "[%s]" % ",".join(items)
return url_list
def execute_transaction(self, transaction):
params = dict(tx=transaction.actions)
return self.request.post(self.transction_path, params)
def _remove_null_values(self, data):
"""Removes null property values because they aren't valid in Neo4j."""
# using PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
clean_data = [(k, data[k]) for k in data if data[k] is not None] # Python 3
return dict(clean_data)
class RexsterResource(Resource):
"""Low-level client that connects to Neo4j Server and returns a response."""
vertex_path = "vertices"
edge_path = "edges"
index_path = "indices"
gremlin_path = "tp/gremlin"
transaction_path = "tp/batch/tx"
multi_get_path = "tp/batch"
def __init__(self,config):
self.config = config
self.registry = Registry(config)
self.scripts = GroovyScripts()
self.scripts.update(self._get_scripts_file("gremlin.groovy"))
self.registry.add_scripts("gremlin",self.scripts)
self.type_system = JSONTypeSystem()
self.request = RexsterRequest(config,self.type_system.content_type)
# Gremlin
def gremlin(self,script,params=None):
"""Executes a Gremlin script and returns the Response."""
params = dict(script=script,params=params)
return self.request.post(self.gremlin_path,params)
# Vertex Proxy
def create_vertex(self,data):
"""Creates a vertex and returns the Response."""
data = self._remove_null_values(data)
return self.request.post(self.vertex_path,data)
def get_vertex(self,_id):
"""Gets the vertex with the _id and returns the Response."""
path = build_path(self.vertex_path,_id)
return self.request.get(path,params=None)
def update_vertex(self,_id,data):
"""Updates the vertex with the _id and returns the Response."""
data = self._remove_null_values(data)
path = build_path(self.vertex_path,_id)
return self.request.put(path,data)
def delete_vertex(self,_id):
"""Deletes a vertex with the _id and returns the Response."""
path = build_path(self.vertex_path,_id)
return self.request.delete(path,params=None)
# Edge Proxy
def create_edge(self,outV,label,inV,data={}):
"""Creates a edge and returns the Response."""
data = self._remove_null_values(data)
edge_data = dict(_outV=outV,_label=label,_inV=inV)
data.update(edge_data)
return self.request.post(self.edge_path,data)
def get_edge(self,_id):
"""Gets the edge with the _id and returns the Response."""
path = build_path(self.edge_path,_id)
return self.request.get(path,params=None)
def update_edge(self,_id,data):
"""Updates the edge with the _id and returns the Response."""
data = self._remove_null_values(data)
path = build_path(self.edge_path,_id)
return self.request.put(path,data)
def delete_edge(self,_id):
"""Deletes a edge with the _id and returns the Response."""
path = build_path(self.edge_path,_id)
return self.request.delete(path,params=None)
# Vertex Container
def outE(self,_id,label=None):
"""Return the outgoing edges of the vertex."""
script = self.scripts.get('outE')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def inE(self,_id,label=None):
"""Return the incoming edges of the vertex."""
script = self.scripts.get('inE')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def bothE(self,_id,label=None):
"""Return all incoming and outgoing edges of the vertex."""
script = self.scripts.get('bothE')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def outV(self,_id,label=None):
"""Return the out-adjacent vertices to the vertex."""
script = self.scripts.get('outV')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def inV(self,_id,label=None):
"""Return the in-adjacent vertices of the vertex."""
script = self.scripts.get('inV')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def bothV(self,_id,label=None):
"""Return all incoming- and outgoing-adjacent vertices of vertex."""
script = self.scripts.get('bothV')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
# Index Proxy - General
def get_all_indices(self):
"""Returns a list of all the element indices."""
return self.request.get(self.index_path,params=None)
def get_index(self,name):
path = build_path(self.index_path,name)
return self.request.get(path,params=None)
def delete_index(self,name):
"""Deletes the index with the index_name."""
path = build_path(self.index_path,name)
return self.request.delete(path,params=None)
# Index Proxy - Vertex
def create_vertex_index(self,index_name,*args,**kwds):
"""Creates a vertex index with the specified params."""
path = build_path(self.index_path,index_name)
index_type = kwds.get('index_type','manual')
index_keys = kwds.get('index_keys',None)
params = {'class':'vertex','type':index_type}
if index_keys:
params.update({'keys':index_keys})
return self.request.post(path,params)
def get_vertex_index(self,name):
"""Returns the vertex index with the index_name."""
return self.get_index(name)
def delete_vertex_index(self,name):
"""Deletes the vertex index with the index_name."""
return self.delete_index(name)
# Index Proxy - Edge
def create_edge_index(self,name,*args,**kwds):
"""Creates a edge index with the specified params."""
path = build_path(self.index_path,name)
index_type = kwds.get('index_type','manual')
index_keys = kwds.get('index_keys',None)
params = {'class':'edge','type':index_type}
if index_keys:
params.update({'keys':index_keys})
return self.request.post(path,params)
def get_edge_index(self,name):
"""Returns the edge index with the index_name."""
return self.get_index(name)
def delete_edge_index(self,name):
"""Deletes the edge index with the index_name."""
self.delete_index(name)
#def create_automatic_vertex_index(self,index_name,element_class,keys=None):
# keys = json.dumps(keys) if keys else "null"
# params = dict(index_name=index_name,element_class=element_class,keys=keys)
# script = self.scripts.get('create_automatic_vertex_index',params)
# return self.gremlin(script)
#def create_indexed_vertex_automatic(self,data,index_name):
# data = json.dumps(data)
# params = dict(data=data,index_name=index_name)
# script = self.scripts.get('create_automatic_indexed_vertex',params)
# return self.gremlin(script)
# Index Container - General
def index_count(self,index_name,key,value):
path = build_path(self.index_path,index_name,"count")
params = dict(key=key,value=value)
return self.request.get(path,params)
def index_keys(self,index_name):
path = build_path(self.index_path,index_name,"keys")
return self.request.get(path,params=None)
# Index Container - Vertex
def put_vertex(self,index_name,key,value,_id):
"""Adds a vertex to the index with the index_name."""
# Rexster's API only supports string lookups so convert value to a string
path = build_path(self.index_path,index_name)
params = {'key':key,'value':str(value),'class':'vertex','id':_id}
return self.request.put(path,params)
def lookup_vertex(self,index_index_name,key,value):
"""Returns the vertices indexed with the key and value."""
path = build_path(self.index_path,index_index_name)
params = dict(key=key,value=value)
return self.request.get(path,params)
def query_vertex(self,index_name,params):
"""Queries for an edge in the index and returns the Response."""
path = build_path(self.index_path,index_name)
return self.request.get(path,params)
def remove_vertex(self,index_name,_id,key=None,value=None):
"""Removes a vertex from the index and returns the Response."""
# Can Rexster have None for key and value?
path = build_path(self.index_path,index_name)
params = {'key':key,'value':value,'class':'vertex','id':_id}
return self.request.delete(path,params)
# Index Container - Edge
def put_edge(self,index_name,key,value,_id):
"""Adds an edge to the index and returns the Response."""
# Rexster's API only supports string lookups so convert value to a string
path = build_path(self.index_path,index_name)
params = {'key':key,'value':str(value),'class':'edge','id':_id}
return self.request.put(path,params)
def lookup_edge(self,index_index_name,key,value):
"""Looks up an edge in the index and returns the Response."""
path = build_path(self.index_path,index_index_name)
params = dict(key=key,value=value)
return self.request.get(path,params)
def query_edge(self,index_name,params):
"""Queries for an edge in the index and returns the Response."""
path = build_path(self.index_path,index_name)
return self.request.get(path,params)
def remove_edge(self,index_name,_id,key=None,value=None):
"""Removes an edge from the index and returns the Response."""
# Can Rexster have None for key and value?
path = build_path(self.index_path,index_name)
params = {'key':key,'value':value,'class':'edge','id':_id}
return self.request.delete(path,params)
# Model Proxy - Vertex
def create_indexed_vertex(self,data,index_name,keys=None):
"""Creates a vertex, indexes it, and returns the Response."""
data = self._remove_null_values(data)
params = dict(data=data,index_name=index_name,keys=keys)
script = self.scripts.get("create_indexed_vertex")
return self.gremlin(script,params)
def update_indexed_vertex(self,_id,data,index_name,keys=None):
"""Updates an indexed vertex and returns the Response."""
data = self._remove_null_values(data)
params = dict(_id=_id,data=data,index_name=index_name,keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script,params)
# Model Proxy - Edge
def create_indexed_edge(self,data,index_name,keys=None):
"""Creates a edge, indexes it, and returns the Response."""
data = self._remove_null_values(data)
params = dict(data=data,index_name=index_name,keys=keys)
script = self.scripts.get("create_indexed_edge")
return self.gremlin(script,params)
def update_indexed_edge(self,_id,data,index_name,keys=None):
"""Updates an indexed edge and returns the Response."""
data = self._remove_null_values(data)
params = dict(_id=_id,data=data,index_name=index_name,keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script,params)
# Utils
def warm_cache(self):
"""Warms the server cache by loading elements into memory."""
script = self.scripts.get('warm_cache')
return self.gremlin(script,params=None)
# Rexster Specific Stuff
def rebuild_vertex_index(self,index_name):
params = dict(index_name=index_name)
script = self.scripts.get('rebuild_vertex_index',params)
return self.gremlin(script)
def rebuild_edge_index(self,index_name):
params = dict(index_name=index_name)
script = self.scripts.get('rebuild_edge_index',params)
return self.gremlin(script)
# TODO: manual/custom index API
def multi_get_vertices(self,id_list):
path = build_path(self.multi_get_path,"vertices")
idList = self._build_url_list(id_list)
params = dict(idList=idList)
return self.request.get(path,params)
def multi_get_edges(self,id_list):
path = build_path(self.multi_get_path,"edges")
idList = self._build_url_list(id_list)
params = dict(idList=idList)
return self.request.get(path,params)
def _build_url_list(items):
items = [str(item) for item in items]
url_list = "[%s]" % ",".join(items)
return url_list
def execute_transaction(self,transaction):
params = dict(tx=transaction.actions)
return self.request.post(self.transction_path,params)
def _get_scripts_file(self,file_name):
dir_name = os.path.dirname(__file__)
file_path = get_file_path(dir_name,file_name)
return file_path
def _remove_null_values(self,data):
"""Removes null property values because they aren't valid in Neo4j."""
# Neo4j Server uses PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
clean_data = [(k, v) for k, v in data.items() if v is not None]
return dict(clean_data)
class RexsterClient(Client):
"""
Low-level client that sends a request to Rexster and returns a response.
:param config: Optional Config object. Defaults to default Config.
:type config: bulbs.config.Config
:cvar default_uri: Default URI for the database.
:cvar request_class: Request class for the Client.
:ivar config: Config object.
:ivar registry: Registry object.
:ivar scripts: GroovyScripts object.
:ivar type_system: JSONTypeSystem object.
:ivar request: RexsterRequest object.
Example:
>>> from bulbs.rexster import RexsterClient
>>> client = RexsterClient()
>>> script = client.scripts.get("get_vertices")
>>> response = client.gremlin(script, params=None)
>>> result = response.results.next()
"""
#: Default URI for the database.
default_uri = REXSTER_URI
request_class = RexsterRequest
def __init__(self, config=None, db_name=None):
# This makes is easy to test different DBs
uri = self._get_uri(db_name) or self.default_uri
self.config = config or Config(uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config,
self.type_system.content_type)
# Rexster supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts(self.config)
# Also include the Rexster-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
def _get_uri(self, db_name):
if db_name is not None:
uri = "http://localhost:8182/graphs/%s" % db_name
return uri
# Gremlin
def gremlin(self, script, params=None, load=None):
"""
Executes a Gremlin script and returns the Response.
:param script: Gremlin script to execute.
:type script: str
:param params: Param bindings for the script.
:type params: dict
:rtype: RexsterResponse
"""
params = dict(script=script, params=params)
if self.config.server_scripts is True:
params["load"] = load or [self.scripts.default_namespace]
return self.request.post(gremlin_path, params)
# Vertex Proxy
def create_vertex(self, data, keys=None):
"""
Creates a vertex and returns the Response.
:param data: Property data.
:type data: dict
:rtype: RexsterResponse
"""
if keys or self.config.autoindex is True:
index_name = self.config.vertex_index
return self.create_indexed_vertex(data, index_name, keys=keys)
data = self._remove_null_values(data)
return self.request.post(vertex_path, data)
def get_vertex(self, _id):
"""
Gets the vertex with the _id and returns the Response.
:param data: Vertex ID.
:type data: int
:rtype: RexsterResponse
"""
path = build_path(vertex_path, _id)
return self.request.get(path, params=None)
def get_all_vertices(self):
"""
Returns a Response containing all the vertices in the Graph.
:rtype: RexsterResponse
"""
script = self.scripts.get("get_vertices")
params = None
return self.gremlin(script, params)
def update_vertex(self, _id, data, keys=None):
"""
Updates the vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
path = build_path(vertex_path, _id)
return self.request.put(path, data)
def delete_vertex(self, _id):
"""
Deletes a vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:rtype: RexsterResponse
"""
path = build_path(vertex_path, _id)
return self.request.delete(path, params=None)
# Edge Proxy
def create_edge(self, outV, label, inV, data={}, keys=None):
"""
Creates a edge and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict or None
:rtype: RexsterResponse
"""
if keys or self.config.autoindex is True:
index_name = self.config.edge_index
return self.create_indexed_edge(outV,
label,
inV,
data,
index_name,
keys=keys)
data = self._remove_null_values(data)
edge_data = dict(_outV=outV, _label=label, _inV=inV)
data.update(edge_data)
return self.request.post(edge_path, data)
def get_edge(self, _id):
"""
Gets the edge with the _id and returns the Response.
:param data: Edge ID.
:type data: int
:rtype: RexsterResponse
"""
path = build_path(edge_path, _id)
return self.request.get(path, params=None)
def get_all_edges(self):
"""
Returns a Response containing all the edges in the Graph.
:rtype: RexsterResponse
"""
script = self.scripts.get("get_edges")
params = None
return self.gremlin(script, params)
def update_edge(self, _id, data, keys=None):
"""
Updates the edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
path = build_path(edge_path, _id)
return self.request.put(path, data)
def delete_edge(self, _id):
"""
Deletes a edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:rtype: RexsterResponse
"""
path = build_path(edge_path, _id)
return self.request.delete(path, params=None)
# Vertex Container
def outE(self, _id, label=None, start=None, limit=None):
"""
Returns the outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get('outE')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def inE(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get('inE')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def bothE(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming and outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get('bothE')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def outV(self, _id, label=None, start=None, limit=None):
"""
Returns the out-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get('outV')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def inV(self, _id, label=None, start=None, limit=None):
"""
Returns the in-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get('inV')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def bothV(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming- and outgoing-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: RexsterResponse
"""
script = self.scripts.get('bothV')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
# Index Proxy - General
def get_all_indices(self):
"""Returns a list of all the element indices."""
return self.request.get(index_path, params=None)
def get_index(self, name):
path = build_path(index_path, name)
return self.request.get(path, params=None)
def delete_index(self, name):
"""Deletes the index with the index_name."""
path = build_path(index_path, name)
return self.request.delete(path, params=None)
# Index Proxy - Vertex
def create_vertex_index(self, index_name, *args, **kwds):
"""
Creates a vertex index with the specified params.
:param index_name: Name of the index to create.
:type index_name: str
:rtype: RexsterResponse
"""
path = build_path(index_path, index_name)
index_type = kwds.get('index_type', 'manual')
index_keys = kwds.get('index_keys', None)
params = {'class': 'vertex', 'type': index_type}
if index_keys:
params.update({'keys': index_keys})
return self.request.post(path, params)
def get_vertex_index(self, index_name):
"""
Returns the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
return self.get_index(index_name)
def get_or_create_vertex_index(self, index_name, index_params=None):
script = self.scripts.get('get_or_create_vertex_index')
params = dict(index_name=index_name, index_params=index_params)
resp = self.gremlin(script, params)
#assert "MANUAL" in resp.content['results'][0]
result = {'name': index_name, 'type': 'manual', 'class': 'vertex'}
resp.results = RexsterResult(result, self.config)
return resp
def delete_vertex_index(self, name):
"""
Deletes the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
return self.delete_index(name)
# Index Proxy - Edge
def create_edge_index(self, name, *args, **kwds):
"""
Creates a edge index with the specified params.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
path = build_path(index_path, name)
index_type = kwds.get('index_type', 'manual')
index_keys = kwds.get('index_keys', None)
params = {'class': 'edge', 'type': index_type}
if index_keys:
params.update({'keys': index_keys})
return self.request.post(path, params)
def get_edge_index(self, name):
"""
Returns the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
return self.get_index(name)
def get_or_create_edge_index(self, index_name, index_params=None):
script = self.scripts.get('get_or_create_edge_index')
params = dict(index_name=index_name, index_params=index_params)
resp = self.gremlin(script, params)
#assert "MANUAL" in resp.content['results'][0]
result = {'name': index_name, 'type': 'manual', 'class': 'edge'}
resp.results = RexsterResult(result, self.config)
return resp
def delete_edge_index(self, name):
"""
Deletes the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: RexsterResponse
"""
self.delete_index(name)
#def create_automatic_vertex_index(self,index_name,element_class,keys=None):
# keys = json.dumps(keys) if keys else "null"
# params = dict(index_name=index_name,element_class=element_class,keys=keys)
# script = self.scripts.get('create_automatic_vertex_index',params)
# return self.gremlin(script)
#def create_indexed_vertex_automatic(self,data,index_name):
# data = json.dumps(data)
# params = dict(data=data,index_name=index_name)
# script = self.scripts.get('create_automatic_indexed_vertex',params)
# return self.gremlin(script)
# Index Container - General
def index_count(self, index_name, key, value):
path = build_path(index_path, index_name, "count")
params = dict(key=key, value=value)
return self.request.get(path, params)
def index_keys(self, index_name):
path = build_path(index_path, index_name, "keys")
return self.request.get(path, params=None)
# Index Container - Vertex
def put_vertex(self, index_name, key, value, _id):
"""
Adds a vertex to the index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Vertex ID
:type _id: int
:rtype: RexsterResponse
"""
# Rexster's API only supports string lookups so convert value to a string
path = build_path(index_path, index_name)
params = {
'key': key,
'value': str(value),
'class': 'vertex',
'id': _id
}
return self.request.put(path, params)
def lookup_vertex(self, index_index_name, key, value):
"""
Returns the vertices indexed with the key and value.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: RexsterResponse
"""
path = build_path(index_path, index_index_name)
params = dict(key=key, value=value)
return self.request.get(path, params)
def query_vertex(self, index_name, params):
"""Queries for an edge in the index and returns the Response."""
path = build_path(index_path, index_name)
return self.request.get(path, params)
def remove_vertex(self, index_name, _id, key=None, value=None):
"""
Removes a vertex from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: RexsterResponse
"""
# Can Rexster have None for key and value?
path = build_path(index_path, index_name)
params = {'key': key, 'value': value, 'class': 'vertex', 'id': _id}
return self.request.delete(path, params)
# Index Container - Edge
def put_edge(self, index_name, key, value, _id):
"""
Adds an edge to the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Edge ID
:type _id: int
:rtype: RexsterResponse
"""
# Rexster's API only supports string lookups so convert value to a string
path = build_path(index_path, index_name)
params = {'key': key, 'value': str(value), 'class': 'edge', 'id': _id}
return self.request.put(path, params)
def lookup_edge(self, index_index_name, key, value):
"""
Looks up an edge in the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: RexsterResponse
"""
path = build_path(index_path, index_index_name)
params = dict(key=key, value=value)
return self.request.get(path, params)
def query_edge(self, index_name, params):
"""Queries for an edge in the index and returns the Response."""
path = build_path(index_path, index_name)
return self.request.get(path, params)
def remove_edge(self, index_name, _id, key=None, value=None):
"""
Removes an edge from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param _id: Edge ID
:type _id: int
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: RexsterResponse
"""
# Can Rexster have None for key and value?
path = build_path(index_path, index_name)
params = {'key': key, 'value': value, 'class': 'edge', 'id': _id}
return self.request.delete(path, params)
# Model Proxy - Vertex
def create_indexed_vertex(self, data, index_name, keys=None):
"""
Creates a vertex, indexes it, and returns the Response.
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
params = dict(data=data, index_name=index_name, keys=keys)
script = self.scripts.get("create_indexed_vertex")
resp = self.gremlin(script, params)
resp.results = resp.one()
return resp
def update_indexed_vertex(self, _id, data, index_name, keys=None):
"""
Updates an indexed vertex and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script, params)
# Model Proxy - Edge
def create_indexed_edge(self,
outV,
label,
inV,
data,
index_name,
keys=None):
"""
Creates a edge, indexes it, and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
edge_params = dict(outV=outV,
label=label,
inV=inV,
label_var=self.config.label_var)
params = dict(data=data, index_name=index_name, keys=keys)
params.update(edge_params)
script = self.scripts.get("create_indexed_edge")
resp = self.gremlin(script, params)
resp.results = resp.one()
return resp
def update_indexed_edge(self, _id, data, index_name, keys=None):
"""
Updates an indexed edge and returns the Response.
:param _id: Edge ID.
:type _id: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: RexsterResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script, params)
# Utils
def warm_cache(self):
"""Warms the server cache by loading elements into memory."""
script = self.scripts.get('warm_cache')
return self.gremlin(script, params=None)
# Rexster Specific Stuff
def rebuild_vertex_index(self, index_name):
params = dict(index_name=index_name)
script = self.scripts.get('rebuild_vertex_index', params)
return self.gremlin(script)
def rebuild_edge_index(self, index_name):
params = dict(index_name=index_name)
script = self.scripts.get('rebuild_edge_index', params)
return self.gremlin(script)
# TODO: manual/custom index API
def multi_get_vertices(self, id_list):
path = build_path(multi_get_path, "vertices")
idList = self._build_url_list(id_list)
params = dict(idList=idList)
return self.request.get(path, params)
def multi_get_edges(self, id_list):
path = build_path(multi_get_path, "edges")
idList = self._build_url_list(id_list)
params = dict(idList=idList)
return self.request.get(path, params)
def _build_url_list(self, items):
items = [str(item) for item in items]
url_list = "[%s]" % ",".join(items)
return url_list
def execute_transaction(self, transaction):
params = dict(tx=transaction.actions)
return self.request.post(self.transction_path, params)
def _remove_null_values(self, data):
"""Removes null property values because they aren't valid in Neo4j."""
# using PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
clean_data = [(k, data[k]) for k in data
if data[k] is not None] # Python 3
return dict(clean_data)
class Neo4jResource(Resource):
vertex_path = "node"
edge_path = "relationships"
index_path = "index"
gremlin_path = "ext/GremlinPlugin/graphdb/execute_script"
cypher_path = "ext/CypherPlugin/graphdb/execute_query"
#cypher_path = "cypher"
def __init__(self,config):
"""
Initializes a resource object.
:param root_uri: the base URL of Rexster.
"""
self.config = config
self.registry = Registry(config)
self.scripts = Scripts()
dir_name = os.path.dirname(__file__)
self.scripts.override(get_file_path(dir_name,"gremlin.groovy"))
self.registry.add_scripts("gremlin",self.scripts)
self.type_system = self._get_type_system()
self.request = Neo4jRequest(config,self.type_system.content_type)
# Gremlin
def gremlin(self,script,params=None):
params = dict(script=script,params=params)
return self.request.post(self.gremlin_path,params)
# Cypher
def cypher(self,query,params=None):
params = dict(query=query,params=params)
return self.request.post(self.cypher_path,params)
# Vertex Proxy
def create_vertex(self,data):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.vertex_autoindex
return self.create_indexed_vertex(data,index_name,keys=None)
return self.request.post(self.vertex_path,data)
def get_vertex(self,_id):
path = build_path(self.vertex_path,_id)
return self.request.get(path,params=None)
def update_vertex(self,_id,data):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.vertex_autoindex
return self.update_indexed_vertex(_id,data,index_name,keys=None)
path = build_path(self.vertex_path,_id,"properties")
return self.request.put(path,data)
def delete_vertex(self,_id):
# Neo4j requires you delete all adjacent edges first.
# But the Neo4jServer DELETE URI doesn't do this so
# I created a Gremlin method for it. - James
params = dict(_id=_id)
script = self.scripts.get("delete_vertex")
return self.gremlin(script,params)
# Edge Proxy
def create_edge(self,outV,label,inV,data={}):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.edge_autoindex
return self.create_indexed_edge(outV,label,inV,data,index_name,keys=None)
path = build_path(self.vertex_path,outV,self.edge_path)
inV_uri = "%s/node/%s" % (self.config.root_uri.rstrip("/"), inV)
params = {'to':inV_uri,'type':label, 'data':data}
return self.request.post(path,params)
def get_edge(self,_id):
path = build_path("relationship",_id)
return self.request.get(path,params=None)
def update_edge(self,_id,data):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.edge_autoindex
return self.update_indexed_edge(_id,data,index_name,keys=None)
path = build_path("relationship",_id,"properties")
return self.request.put(path,data)
def delete_edge(self,_id):
# note relationship path is singular, not plural
path = build_path("relationship",_id)
return self.request.delete(path,params=None)
# Vertex Container
def outE(self,_id,label=None):
"""Return the outgoing edges of the vertex."""
script = self.scripts.get('outE')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def inE(self,_id,label=None):
"""Return the incoming edges of the vertex."""
script = self.scripts.get('inE')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def bothE(self,_id,label=None):
"""Return all incoming and outgoing edges of the vertex."""
script = self.scripts.get('bothE')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def outV(self,_id,label=None):
"""Return the out-adjacent vertices to the vertex."""
script = self.scripts.get('outV')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def inV(self,_id,label=None):
"""Return the in-adjacent vertices of the vertex."""
script = self.scripts.get('inV')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
def bothV(self,_id,label=None):
"""Return all incoming- and outgoing-adjacent vertices of vertex."""
script = self.scripts.get('bothV')
params = dict(_id=_id,label=label)
return self.gremlin(script,params)
# Index Proxy - Vertex
def create_vertex_index(self,index_name,*args,**kwds):
index_type = kwds.pop("index_type","exact")
provider = kwds.pop("provider","lucene")
#keys = kwds.pop("keys",None)
#keys = json.dumps(keys) if keys else "null"
#config = {'type':index_type,'provider':provider,'keys':str(keys)}
config = {'type':index_type,'provider':provider}
path = build_path(self.index_path,"node")
params = dict(name=index_name,config=config)
return self.request.post(path,params)
def get_vertex_indices(self):
# returns a map of indices
path = build_path(self.index_path,"node")
return self.request.get(path,params=None)
def get_vertex_index(self,index_name):
resp = self.get_vertex_indices()
resp.results = self._get_index_results(index_name,resp)
return resp
def delete_vertex_index(self,name):
path = build_path(self.index_path,"node",name)
return self.request.delete(path,params=None)
# Index Proxy - Edge
def create_edge_index(self,index_name,*args,**kwds):
path = build_path(self.index_path,"relationship")
params = dict(name=index_name)
return self.request.post(path,params)
def get_edge_indices(self):
path = build_path(self.index_path,"relationship")
return self.request.get(path,params=None)
def get_edge_index(self,index_name):
resp = self.get_edge_indices()
resp.results = self._get_index_results(index_name,resp)
return resp
def delete_edge_index(self,name):
pass
def _get_index_results(self,index_name,resp):
# this is pretty much a hack becuase the way neo4j does this is inconsistent
results = None # for clarity
content = resp.content
if content and index_name in content:
result = content[index_name]
result['name'] = index_name
results = Neo4jResult(result)
return results
# Model Proxy - Vertex
def create_indexed_vertex(self,data,index_name,keys=None):
data = self._remove_null_values(data)
params = dict(data=data,index_name=index_name,keys=keys)
script = self.scripts.get("create_indexed_vertex")
return self.gremlin(script,params)
def update_indexed_vertex(self,_id,data,index_name,keys=None):
data = self._remove_null_values(data)
params = dict(_id=_id,data=data,index_name=index_name,keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script,params)
# Model Proxy - Edge
def create_indexed_edge(self,outV,label,inV,data,index_name,keys=None):
data = self._remove_null_values(data)
edge_params = dict(outV=outV,label=label,inV=inV)
params = dict(data=data,index_name=index_name,keys=keys)
params.update(edge_params)
script = self.scripts.get("create_indexed_edge")
return self.gremlin(script,params)
def update_indexed_edge(self,_id,data,index_name,keys=None):
data = self._remove_null_values(data)
params = dict(_id=_id,data=data,index_name=index_name,keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script,params)
# Utils
def warm_cache(self):
script = self.scripts.get('warm_cache')
return self.gremlin(script,params=None)
def _remove_null_values(self,data):
# You could do this at the Model._get_property_data(),
# but this may not be needed for all databases.
# Moreover, Neo4j Server uses PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
clean_data = [(k, v) for k, v in data.items() if v is not None]
return dict(clean_data)
#
# Deprecated
#
# Indexed vertices
def put_vertex(self,name,key,value,_id):
path = build_path(self.index_path,"node",name)
uri = "%s/%s/%d" % (self.config.root_uri,"node",_id)
params = dict(key=key,value=value,uri=uri)
return self.request.post(path,params)
def lookup_vertex(self,name,key,value):
path = build_path(self.index_path,"node",name,key,value)
return self.request.get(path,params=None)
def query_vertex(self,name,params):
path = build_path(self.index_path,"node",name)
return self.request.get(path,params)
def remove_vertex_from_index(self,name,_id,key=None,value=None):
#if key is not None and value is not None:
# path = build_path("node",name,key,value,_id)
#elif key is not None:
# path = build_path("node",name,key,_id)
#else:
# path = build_path("node",name,_id)
path = build_path("node",name,key,value,_id)
return self.request.delete(path,params=None)
def put_edge(self,name,key,value,_id):
path = build_path(self.index_path,"relationship",name)
uri = "%s/%s/%d" % (self.config.root_uri,"relationship",_id)
params = dict(key=key,value=value,uri=uri)
return self.request.post(path,params)
def _get_type_system(self):
type_system_map = dict(json=JSONTypeSystem)
type_system = type_system_map[self.config.type_system]
return type_system()
class Neo4jClient(Client):
"""
Low-level client that sends a request to Neo4j Server and returns a response.
:param config: Optional Config object. Defaults to default Config.
:type config: bulbs.config.Config
:ivar config: Config object.
:ivar registry: Registry object.
:ivar scripts: GroovyScripts object.
:ivar type_system: JSONTypeSystem object.
:ivar request: Neo4jRequest object.
Example:
>>> from bulbs.neo4jserver import Neo4jClient
>>> client = Neo4jClient()
>>> response = client.get_all_vertices()
>>> result = response.results.next()
"""
#: Default URI for the database.
default_uri = NEO4J_URI
#: Request class for the Client.
request_class = Neo4jRequest
def __init__(self, config=None):
self.config = config or Config(self.default_uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config,
self.type_system.content_type)
# Neo4j supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts(self.config)
# Also include the Neo4j Server-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
# Gremlin
def gremlin(self, script, params=None):
"""
Executes a Gremlin script and returns the Response.
:param script: Gremlin script to execute.
:type script: str
:param params: Param bindings for the script.
:type params: dict
:rtype: Neo4jResponse
"""
path = gremlin_path
params = dict(script=script, params=params)
return self.request.post(path, params)
# Cypher
def cypher(self, query, params=None):
"""
Executes a Cypher query and returns the Response.
:param query: Cypher query to execute.
:type query: str
:param params: Param bindings for the query.
:type params: dict
:rtype: Neo4jResponse
"""
path = cypher_path
params = dict(query=query, params=params)
resp = self.request.post(path, params)
# Cypher data hack
resp.total_size = len(resp.results.data)
resp.results = (Neo4jResult(result[0], self.config)
for result in resp.results.data)
return resp
# Vertex Proxy
def create_vertex(self, data, keys=None):
"""
Creates a vertex and returns the Response.
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if keys or self.config.autoindex is True:
index_name = self.config.vertex_index
return self.create_indexed_vertex(data, index_name, keys=keys)
path = vertex_path
params = self._remove_null_values(data)
return self.request.post(path, params)
def get_vertex(self, _id):
"""
Gets the vertex with the _id and returns the Response.
:param data: Vertex ID.
:type data: int
:rtype: Neo4jResponse
"""
path = build_path(vertex_path, _id)
params = None
return self.request.get(path, params)
def get_all_vertices(self):
"""
Returns a Response containing all the vertices in the Graph.
:rtype: Neo4jResponse
"""
script = self.scripts.get("get_vertices")
params = None
return self.gremlin(script, params)
def update_vertex(self, _id, data, keys=None):
"""
Updates the vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if keys or self.config.autoindex is True:
index_name = self.config.vertex_index
return self.update_indexed_vertex(_id, data, index_name, keys=keys)
path = self._build_vertex_path(_id, "properties")
params = self._remove_null_values(data)
return self.request.put(path, params)
def delete_vertex(self, _id):
"""
Deletes a vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:rtype: Neo4jResponse
"""
script = self.scripts.get("delete_vertex")
params = dict(_id=_id)
return self.gremlin(script, params)
# Edge Proxy
def create_edge(self, outV, label, inV, data=None, keys=None):
"""
Creates a edge and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict or None
:rtype: Neo4jResponse
"""
if keys or self.config.autoindex is True:
index_name = self.config.edge_index
return self.create_indexed_edge(outV,
label,
inV,
data,
index_name,
keys=keys)
data = self._remove_null_values(data)
inV_uri = self._build_vertex_uri(inV)
path = build_path(vertex_path, outV, "relationships")
params = {'to': inV_uri, 'type': label, 'data': data}
return self.request.post(path, params)
def get_edge(self, _id):
"""
Gets the edge with the _id and returns the Response.
:param data: Edge ID.
:type data: int
:rtype: Neo4jResponse
"""
path = build_path(edge_path, _id)
params = None
return self.request.get(path, params)
def get_all_edges(self):
"""
Returns a Response containing all the edges in the Graph.
:rtype: Neo4jResponse
"""
script = self.scripts.get("get_edges")
params = None
return self.gremlin(script, params)
def update_edge(self, _id, data, keys=None):
"""
Updates the edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if keys or self.config.autoindex is True:
index_name = self.config.edge_index
return self.update_indexed_edge(_id, data, index_name, keys=keys)
path = build_path(edge_path, _id, "properties")
params = self._remove_null_values(data)
return self.request.put(path, params)
def delete_edge(self, _id):
"""
Deletes a edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:rtype: Neo4jResponse
"""
path = build_path(edge_path, _id)
params = None
return self.request.delete(path, params)
# Vertex Container
def outE(self, _id, label=None, start=None, limit=None):
"""
Returns the outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get('outE')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def inE(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get('inE')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def bothE(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming and outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get('bothE')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def outV(self, _id, label=None, start=None, limit=None):
"""
Returns the out-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get('outV')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def inV(self, _id, label=None, start=None, limit=None):
"""
Returns the in-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get('inV')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
def bothV(self, _id, label=None, start=None, limit=None):
"""
Returns the incoming- and outgoing-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get('bothV')
params = dict(_id=_id, label=label, start=start, limit=limit)
return self.gremlin(script, params)
#: Index Proxy - Vertex
def create_vertex_index(self, index_name, *args, **kwds):
"""
Creates a vertex index with the specified params.
:param index_name: Name of the index to create.
:type index_name: str
:rtype: Neo4jResponse
"""
default_config = {'type': "exact", 'provider': "lucene"}
index_config = kwds.pop("index_config", default_config)
path = build_path(index_path, vertex_path)
params = dict(name=index_name, config=index_config)
resp = self.request.post(path, params)
resp._set_index_name(index_name)
return resp
def get_vertex_indices(self):
"""
Returns all the vertex indices.
:rtype: Neo4jResponse
"""
path = build_path(index_path, vertex_path)
params = None
return self.request.get(path, params)
def get_vertex_index(self, index_name):
"""
Returns the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
resp = self.get_vertex_indices()
resp.results = self._get_index_results(index_name, resp)
if resp.results:
resp._set_index_name(index_name)
return resp
def get_or_create_vertex_index(self, index_name, *args, **kwds):
"""
Get a Vertex Index or create it if it doesn't exist.
:param index_name: Index name.
:type index_name: str
:param index_config: Index configuration.
:type index_config: dict
:rtype: bulbs.neo4jserver.index.Index
"""
# Neo4j's create index endpoint returns the index if it already exists
return self.create_vertex_index(index_name, *args, **kwds)
def delete_vertex_index(self, index_name):
"""
Deletes the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, vertex_path, index_name)
params = None
return self.request.delete(path, params)
# Index Proxy - Edge
def create_edge_index(self, index_name, *args, **kwds):
"""
Creates a edge index with the specified params.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
default_config = {'type': "exact", 'provider': "lucene"}
index_config = kwds.pop("index_config", default_config)
path = build_path(index_path, edge_path)
params = dict(name=index_name, config=index_config)
resp = self.request.post(path, params)
resp._set_index_name(index_name)
return resp
def get_edge_indices(self):
"""
Returns a dict of all the vertex indices.
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path)
params = None
return self.request.get(path, params)
def get_edge_index(self, index_name):
"""
Returns the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
resp = self.get_edge_indices()
resp.results = self._get_index_results(index_name, resp)
if resp.results:
resp._set_index_name(index_name)
return resp
def get_or_create_edge_index(self, index_name, *args, **kwds):
"""
Get a Edge Index or create it if it doesn't exist.
:param index_name: Index name.
:type index_name: str
:param index_config: Index configuration.
:type index_config: dict
:rtype: bulbs.neo4jserver.index.Index
"""
# Neo4j's create index endpoint returns the index if it already exists
return self.create_edge_index(index_name, *args, **kwds)
def delete_edge_index(self, index_name):
"""
Deletes the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path, index_name)
params = None
return self.request.delete(path, params)
# Index Container - Vertex
def put_vertex(self, index_name, key, value, _id):
"""
Adds a vertex to the index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Vertex ID
:type _id: int
:rtype: Neo4jResponse
"""
uri = "%s/%s/%d" % (self.config.root_uri, vertex_path, _id)
path = build_path(index_path, vertex_path, index_name)
params = dict(key=key, value=value, uri=uri)
return self.request.post(path, params)
def lookup_vertex(self, index_name, key, value):
"""
Returns the vertices indexed with the key and value.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
# converting all values to strings because that's how they're stored
path = build_path(index_path, vertex_path, index_name, key, value)
params = None
return self.request.get(path, params)
def create_unique_vertex(self, index_name, key, value, data=None):
"""
Create unique (based on the key / value pair) vertex with the properties
described by data.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param data: Properties of the new element.
:type data: dict
:rtype: Neo4jResponse
"""
data = {} if data is None else data
data = self._remove_null_values(data)
path = (build_path(index_path, vertex_path, index_name) +
'?uniqueness=get_or_create')
params = {'key': key, 'value': value, 'properties': data}
return self.request.post(path, params)
def query_vertex(self, index_name, query):
"""
Queries the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param query: Lucene query string
:type query: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, vertex_path, index_name)
params = dict(query=query)
return self.request.get(path, params)
def remove_vertex(self, index_name, _id, key=None, value=None):
"""
Removes a vertex from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, vertex_path, index_name, key, value, _id)
params = None
return self.request.delete(path, params)
# Index Container - Edge
def put_edge(self, index_name, key, value, _id):
"""
Adds an edge to the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Edge ID
:type _id: int
:rtype: Neo4jResponse
"""
uri = "%s/%s/%d" % (self.config.root_uri, edge_path, _id)
path = build_path(index_path, edge_path, index_name)
params = dict(key=key, value=value, uri=uri)
return self.request.post(path, params)
def lookup_edge(self, index_name, key, value):
"""
Looks up an edge in the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
# converting all values to strings because that's how they're stored
path = build_path(index_path, edge_path, index_name, key, value)
params = None
return self.request.get(path, params)
def query_edge(self, index_name, query):
"""
Queries the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param query: Lucene query string
:type query: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path, index_name)
params = dict(query=query)
return self.request.get(path, params)
def remove_edge(self, index_name, _id, key=None, value=None):
"""
Removes an edge from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param _id: Edge ID
:type _id: int
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path, index_name, key, value, _id)
params = None
return self.request.delete(path, params)
# Model Proxy - Vertex
def create_indexed_vertex(self, data, index_name, keys=None):
"""
Creates a vertex, indexes it, and returns the Response.
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
params = dict(data=data, index_name=index_name, keys=keys)
script = self.scripts.get("create_indexed_vertex")
return self.gremlin(script, params)
def update_indexed_vertex(self, _id, data, index_name, keys=None):
"""
Updates an indexed vertex and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script, params)
# Model Proxy - Edge
def create_indexed_edge(self,
outV,
label,
inV,
data,
index_name,
keys=None):
"""
Creates a edge, indexes it, and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
edge_params = dict(outV=outV,
label=label,
inV=inV,
label_var=self.config.label_var)
params = dict(data=data, index_name=index_name, keys=keys)
params.update(edge_params)
script = self.scripts.get("create_indexed_edge")
return self.gremlin(script, params)
def update_indexed_edge(self, _id, data, index_name, keys=None):
"""
Updates an indexed edge and returns the Response.
:param _id: Edge ID.
:type _id: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script, params)
# Metadata
def set_metadata(self, key, value):
"""
Sets the metadata key to the supplied value.
:param key: Metadata key
:type key: str
:param value: Metadata value.
:type value: str, int, or list
:rtype: Neo4jResponse
"""
script = self.scripts.get("set_metadata")
params = dict(key=key, value=value)
return self.gremlin(script, params)
def get_metadata(self, key, default_value=None):
"""
Returns the value of metadata for the key.
:param key: Metadata key
:type key: str
:param default_value: Default value to return if the key is not found.
:type default_value: str, int, or list
:rtype: Neo4jResponse
"""
script = self.scripts.get("get_metadata")
params = dict(key=key, default_value=default_value)
return self.gremlin(script, params)
def remove_metadata(self, key):
"""
Removes the metadata key and value.
:param key: Metadata key
:type key: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("remove_metadata")
params = dict(key=key)
return self.gremlin(script, params)
# Private
def _remove_null_values(self, data):
"""Removes null property values because they aren't valid in Neo4j."""
# Neo4j Server uses PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
data = data or {}
clean_data = [(k, data[k]) for k in data
if data[k] is not None] # Python 3
return dict(clean_data)
def _get_index_results(self, index_name, resp):
"""
Returns the index from a dict of indicies.
"""
if resp.content and index_name in resp.content:
result = resp.content[index_name]
return Neo4jResult(result, self.config)
# Batch related
def _placeholder(self, _id):
pattern = "^{.*}$"
match = re.search(pattern, str(_id))
if match:
placeholder = match.group()
return placeholder
def _build_vertex_path(self, _id, *args):
# if the _id is a placeholder, return the placeholder;
# othewise, return a normal vertex path
placeholder = self._placeholder(_id)
if placeholder:
segments = [placeholder]
else:
segments = [vertex_path, _id]
segments = segments + list(args)
return build_path(*segments)
def _build_vertex_uri(self, _id, *args):
placeholder = self._placeholder(_id)
if placeholder:
return placeholder
root_uri = self.config.root_uri.rstrip("/")
segments = [vertex_path, _id] + list(args)
path = build_path(*segments)
uri = "%s/%s" % (root_uri, path)
return uri
def _build_edge_path(self, _id):
# if the _id is a placeholder, return the placeholder;
# othewise, return a normal edge path
return self._placeholder(_id) or build_path(edge_path, _id)
def _build_edge_uri(self, _id):
pass
class Neo4jResource(Resource):
"""Low-level client that connects to Neo4j Server and returns a response."""
def __init__(self,config):
self.config = config
self.registry = Registry(config)
self.scripts = GroovyScripts()
self.scripts.update(self._get_scripts_file("gremlin.groovy"))
self.registry.add_scripts("gremlin",self.scripts)
self.type_system = JSONTypeSystem()
self.request = Neo4jRequest(config,self.type_system.content_type)
self.message = Message(config, self.scripts)
# Gremlin
def gremlin(self,script,params=None):
"""Executes a Gremlin script and returns the Response."""
message = self.message.gremlin(script,params)
return self.request.send(message)
# Cypher
def cypher(self,query,params=None):
"""Executes a Cypher query and returns the Response."""
message = self.message.cypher(query,params)
return self.request.send(message)
# Vertex Proxy
def create_vertex(self,data):
"""Creates a vertex and returns the Response."""
if self.config.autoindex is True:
index_name = self.config.vertex_autoindex
return self.create_indexed_vertex(data,index_name,keys=None)
message = self.message.create_vertex(data)
return self.request.send(message)
def get_vertex(self,_id):
"""Gets the vertex with the _id and returns the Response."""
message = self.message.get_vertex(_id)
return self.request.send(message)
def update_vertex(self,_id,data):
"""Updates the vertex with the _id and returns the Response."""
if self.config.autoindex is True:
index_name = self.config.vertex_autoindex
return self.update_indexed_vertex(_id,data,index_name,keys=None)
message = self.message.update_vertex(_id,data)
return self.request.send(message)
def delete_vertex(self,_id):
"""Deletes a vertex with the _id and returns the Response."""
message = self.message.delete_vertex(_id)
return self.request.send(message)
# Edge Proxy
def create_edge(self,outV,label,inV,data={}):
"""Creates a edge and returns the Response."""
if self.config.autoindex is True:
index_name = self.config.edge_autoindex
return self.create_indexed_edge(outV,label,inV,data,index_name,keys=None)
message = self.message.create_edge(outV,label,inV,data)
return self.request.send(message)
def get_edge(self,_id):
"""Gets the edge with the _id and returns the Response."""
message = self.message.get_edge(_id)
return self.request.send(message)
def update_edge(self,_id,data):
"""Updates the edge with the _id and returns the Response."""
if self.config.autoindex is True:
index_name = self.config.edge_autoindex
return self.update_indexed_edge(_id,data,index_name,keys=None)
message = self.message.update_edge(_id, data)
return self.request.send(message)
def delete_edge(self,_id):
"""Deletes a edge with the _id and returns the Response."""
message = self.message.delete_edge(_id)
return self.request.send(message)
# Vertex Container
def outE(self,_id,label=None):
"""Return the outgoing edges of the vertex."""
message = self.message.outE(_id,label)
return self.request.send(message)
def inE(self,_id,label=None):
"""Return the incoming edges of the vertex."""
message = self.message.outE(_id,label)
return self.request.send(message)
def bothE(self,_id,label=None):
"""Return all incoming and outgoing edges of the vertex."""
message = self.message.bothE(_id,label)
return self.request.send(message)
def outV(self,_id,label=None):
"""Return the out-adjacent vertices to the vertex."""
message = self.message.outE(_id,label)
return self.request.send(message)
def inV(self,_id,label=None):
"""Return the in-adjacent vertices of the vertex."""
message = self.message.outE(_id,label)
return self.request.send(message)
def bothV(self,_id,label=None):
"""Return all incoming- and outgoing-adjacent vertices of vertex."""
message = self.message.outE(_id,label)
return self.request.send(message)
# Index Proxy - Vertex
def create_vertex_index(self,index_name,*args,**kwds):
"""Creates a vertex index with the specified params."""
message = self.message.create_vertex_index(index_name,*args,**kwds)
resp = self.request.send(message)
resp.set_index_name(index_name)
return resp
def get_vertex_indices(self):
"""Returns a map of all the vertex indices."""
message = self.message.get_vertex_indices()
return self.request.send(message)
def get_vertex_index(self,index_name):
"""Returns the vertex index with the index_name."""
resp = self.get_vertex_indices()
resp.results = self._get_index_results(index_name,resp)
if resp.results:
resp.set_index_name(index_name)
return resp
def delete_vertex_index(self,name):
"""Deletes the vertex index with the index_name."""
message = self.message.delete_vertex_index(name)
return self.request.send(message)
# Index Proxy - Edge
def create_edge_index(self,index_name,*args,**kwds):
"""Creates a edge index with the specified params."""
message = self.message.create_edge_index(index_name,*args,**kwds)
resp = self.request.send(message)
resp.set_index_name(index_name)
return resp
def get_edge_indices(self):
"""Returns a map of all the vertex indices."""
message = self.message.get_edge_indices()
return self.request.send(message)
def get_edge_index(self,index_name):
"""Returns the edge index with the index_name."""
resp = self.get_edge_indices()
resp.results = self._get_index_results(index_name,resp)
if resp.results:
resp.set_index_name(index_name)
return resp
def delete_edge_index(self,name):
"""Deletes the edge index with the index_name."""
message = self.message.delete_edge_index(name)
return self.request.send(message)
# Index Container - Vertex
def put_vertex(self,name,key,value,_id):
"""Adds a vertex to the index with the index_name."""
message = self.message.put_vertex(name,key,value,_id)
return self.request.send(message)
def lookup_vertex(self,name,key,value):
"""Returns the vertices indexed with the key and value."""
message = self.message.lookup_vertex(name,key,value)
return self.request.send(message)
def query_vertex(self,name,params):
"""Returns the vertices for the index query."""
message = self.message.query_vertex(name,params)
return self.request.send(message)
def remove_vertex(self,name,_id,key=None,value=None):
"""Removes a vertex from the index and returns the Response."""
message = self.message.remove_vertex(name,_id,key,value)
return self.request.send(message)
# Index Container - Edge
def put_edge(self,name,key,value,_id):
"""Adds an edge to the index and returns the Response."""
message = self.message.put_edge(name,key,value,_id)
return self.request.send(message)
def lookup_edge(self,name,key,value):
"""Looks up an edge in the index and returns the Response."""
message = self.message.lookup_edge(name,key,value)
return self.request.send(message)
def query_edge(self,name,params):
"""Queries for an edge in the index and returns the Response."""
message = self.message.query_edge(name,params)
return self.request.send(message)
def remove_edge(self,name,_id,key=None,value=None):
"""Removes an edge from the index and returns the Response."""
message = self.message.remove_edge(name,_id,key,value)
return self.request.send(message)
# Model Proxy - Vertex
def create_indexed_vertex(self,data,index_name,keys=None):
"""Creates a vertex, indexes it, and returns the Response."""
message = self.message.create_indexed_vertex(data,index_name,keys)
return self.request.send(message)
# Batch try...
#def create_indexed_vertex(self,data,index_name,keys=None):
# """Creates a vertex, indexes it, and returns the Response."""
# batch = Neo4jBatch(self.resource)
# placeholder = batch.add(self.message.create_vertex(data))
# for key in keys:
# value = data.get(key)
# if value is None: continue
# batch.add(self.message.put_vertex(index_name,key,value,placeholder))
# resp = batch.send()
# #for result in resp.results:
def update_indexed_vertex(self,_id,data,index_name,keys=None):
"""Updates an indexed vertex and returns the Response."""
message = self.message.update_indexed_vertex(_id,data,index_name,keys)
return self.request.send(message)
# Model Proxy - Edge
def create_indexed_edge(self,outV,label,inV,data,index_name,keys=None):
"""Creates a edge, indexes it, and returns the Response."""
message = self.message.create_indexed_edge(outV,label,inV,data,index_name,keys)
return self.request.send(message)
def update_indexed_edge(self,_id,data,index_name,keys=None):
"""Updates an indexed edge and returns the Response."""
message = self.message.update_indexed_edge(_id,data,index_name,keys)
return self.request.send(message)
# Utils
def warm_cache(self):
"""Warms the server cache by loading elements into memory."""
message = self.message.warm_cache()
return self.request.send(message)
# Private
def _get_scripts_file(self,file_name):
"""Returns the full file path for the scripts file."""
dir_name = os.path.dirname(__file__)
file_path = get_file_path(dir_name,file_name)
return file_path
def _get_index_results(self,index_name,resp):
"""Returns the index from a map of indicies."""
if resp.content and index_name in resp.content:
result = resp.content[index_name]
return Neo4jResult(result, self.config)
class Neo4jClient(Client):
"""
Low-level client that sends a request to Neo4j Server and returns a response.
:param config: Optional Config object. Defaults to default Config.
:type config: bulbs.config.Config
:ivar config: Config object.
:ivar registry: Registry object.
:ivar scripts: GroovyScripts object.
:ivar type_system: JSONTypeSystem object.
:ivar request: Neo4jRequest object.
Example:
>>> from bulbs.neo4jserver import Neo4jClient
>>> client = Neo4jClient()
>>> response = client.get_all_vertices()
>>> result = response.results.next()
"""
#: Default URI for the database.
default_uri = NEO4J_URI
#: Request class for the Client.
request_class = Neo4jRequest
def __init__(self, config=None):
self.config = config or Config(self.default_uri)
self.registry = Registry(self.config)
self.type_system = JSONTypeSystem()
self.request = self.request_class(self.config, self.type_system.content_type)
# Neo4j supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts()
# Also include the Neo4j Server-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
# Gremlin
def gremlin(self, script, params=None):
"""
Executes a Gremlin script and returns the Response.
:param script: Gremlin script to execute.
:type script: str
:param params: Param bindings for the script.
:type params: dict
:rtype: Neo4jResponse
"""
path = gremlin_path
params = dict(script=script, params=params)
return self.request.post(path, params)
# Cypher
def cypher(self, query, params=None):
"""
Executes a Cypher query and returns the Response.
:param query: Cypher query to execute.
:type query: str
:param params: Param bindings for the query.
:type params: dict
:rtype: Neo4jResponse
"""
path = cypher_path
params = dict(query=query, params=params)
resp = self.request.post(path, params)
# Cypher data hack
resp.total_size = len(resp.results.data)
resp.results = (Neo4jResult(result[0], self.config) for result in resp.results.data)
return resp
# Vertex Proxy
def create_vertex(self, data):
"""
Creates a vertex and returns the Response.
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.vertex_index
return self.create_indexed_vertex(data, index_name, keys=None)
path = vertex_path
params = self._remove_null_values(data)
return self.request.post(path, params)
def get_vertex(self, _id):
"""
Gets the vertex with the _id and returns the Response.
:param data: Vertex ID.
:type data: int
:rtype: Neo4jResponse
"""
path = build_path(vertex_path, _id)
params = None
return self.request.get(path, params)
def get_all_vertices(self):
"""
Returns a Response containing all the vertices in the Graph.
:rtype: Neo4jResponse
"""
script = self.scripts.get("get_vertices")
params = None
return self.gremlin(script, params)
def update_vertex(self, _id, data):
"""
Updates the vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.vertex_index
return self.update_indexed_vertex(_id, data, index_name, keys=None)
path = self._build_vertex_path(_id, "properties")
params = self._remove_null_values(data)
return self.request.put(path, params)
def delete_vertex(self, _id):
"""
Deletes a vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:rtype: Neo4jResponse
"""
script = self.scripts.get("delete_vertex")
params = dict(_id=_id)
return self.gremlin(script, params)
# Edge Proxy
def create_edge(self, outV, label, inV, data=None):
"""
Creates a edge and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict or None
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.edge_index
return self.create_indexed_edge(outV, label, inV, data, index_name, keys=None)
data = self._remove_null_values(data)
inV_uri = self._build_vertex_uri(inV)
path = build_path(vertex_path, outV, "relationships")
params = {"to": inV_uri, "type": label, "data": data}
return self.request.post(path, params)
def get_edge(self, _id):
"""
Gets the edge with the _id and returns the Response.
:param data: Edge ID.
:type data: int
:rtype: Neo4jResponse
"""
path = build_path(edge_path, _id)
params = None
return self.request.get(path, params)
def get_all_edges(self):
"""
Returns a Response containing all the edges in the Graph.
:rtype: Neo4jResponse
"""
script = self.scripts.get("get_edges")
params = None
return self.gremlin(script, params)
def update_edge(self, _id, data):
"""
Updates the edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.edge_index
return self.update_indexed_edge(_id, data, index_name, keys=None)
path = build_path(edge_path, _id, "properties")
params = self._remove_null_values(data)
return self.request.put(path, params)
def delete_edge(self, _id):
"""
Deletes a edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:rtype: Neo4jResponse
"""
path = build_path(edge_path, _id)
params = None
return self.request.delete(path, params)
# Vertex Container
def outE(self, _id, label=None):
"""
Returns the outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("outE")
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def inE(self, _id, label=None):
"""
Returns the incoming edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("inE")
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def bothE(self, _id, label=None):
"""
Returns the incoming and outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("bothE")
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def outV(self, _id, label=None):
"""
Returns the out-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("outV")
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def inV(self, _id, label=None):
"""
Returns the in-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("inV")
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def bothV(self, _id, label=None):
"""
Returns the incoming- and outgoing-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("bothV")
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
#: Index Proxy - Vertex
def create_vertex_index(self, index_name, *args, **kwds):
"""
Creates a vertex index with the specified params.
:param index_name: Name of the index to create.
:type index_name: str
:rtype: Neo4jResponse
"""
index_type = kwds.pop("index_type", "exact")
provider = kwds.pop("provider", "lucene")
# keys = kwds.pop("keys",None)
# config = {'type':index_type,'provider':provider,'keys':str(keys)}
config = {"type": index_type, "provider": provider}
path = build_path(index_path, "node")
params = dict(name=index_name, config=config)
resp = self.request.post(path, params)
resp._set_index_name(index_name)
return resp
def get_vertex_indices(self):
"""
Returns all the vertex indices.
:rtype: Neo4jResponse
"""
path = build_path(index_path, "node")
params = None
return self.request.get(path, params)
def get_vertex_index(self, index_name):
"""
Returns the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
resp = self.get_vertex_indices()
resp.results = self._get_index_results(index_name, resp)
if resp.results:
resp._set_index_name(index_name)
return resp
def delete_vertex_index(self, index_name):
"""
Deletes the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, "node", index_name)
params = None
return self.request.delete(path, params)
# Index Proxy - Edge
def create_edge_index(self, index_name, *args, **kwds):
"""
Creates a edge index with the specified params.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path)
params = dict(name=index_name)
resp = self.request.post(path, params)
resp._set_index_name(index_name)
return resp
def get_edge_indices(self):
"""
Returns a dict of all the vertex indices.
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path)
params = None
return self.request.get(path, params)
def get_edge_index(self, index_name):
"""
Returns the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
resp = self.get_edge_indices()
resp.results = self._get_index_results(index_name, resp)
if resp.results:
resp._set_index_name(index_name)
return resp
def delete_edge_index(self, index_name):
"""
Deletes the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
path = build_path(index_path, edge_path, index_name)
params = None
return self.request.delete(path, params)
# Index Container - Vertex
def put_vertex(self, index_name, key, value, _id):
"""
Adds a vertex to the index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Vertex ID
:type _id: int
:rtype: Neo4jResponse
"""
uri = "%s/%s/%d" % (self.config.root_uri, "node", _id)
path = build_path(index_path, "node", index_name)
params = dict(key=key, value=value, uri=uri)
return self.request.post(path, params)
def lookup_vertex(self, index_name, key, value):
"""
Returns the vertices indexed with the key and value.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
# converting all values to strings because that's how they're stored
key, value = quote(key), quote(str(value))
path = build_path(index_path, "node", index_name, key, value)
params = None
return self.request.get(path, params)
def remove_vertex(self, index_name, _id, key=None, value=None):
"""
Removes a vertex from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
key, value = quote(key), quote(value)
path = build_path(index_path, "node", index_name, key, value, _id)
params = None
return self.request.delete(path, params)
# Index Container - Edge
def put_edge(self, index_name, key, value, _id):
"""
Adds an edge to the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Edge ID
:type _id: int
:rtype: Neo4jResponse
"""
uri = "%s/%s/%d" % (self.config.root_uri, edge_path, _id)
path = build_path(index_path, edge_path, index_name)
params = dict(key=key, value=value, uri=uri)
return self.request.post(path, params)
def lookup_edge(self, index_name, key, value):
"""
Looks up an edge in the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
# converting all values to strings because that's how they're stored
key, value = quote(key), quote(str(value))
path = build_path(index_path, edge_path, index_name, key, value)
params = None
return self.request.get(path, params)
def remove_edge(self, index_name, _id, key=None, value=None):
"""
Removes an edge from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param _id: Edge ID
:type _id: int
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
key, value = quote(key), quote(value)
path = build_path(index_path, edge_path, index_name, key, value, _id)
params = None
return self.request.delete(path, params)
# Model Proxy - Vertex
def create_indexed_vertex(self, data, index_name, keys=None):
"""
Creates a vertex, indexes it, and returns the Response.
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
params = dict(data=data, index_name=index_name, keys=keys)
script = self.scripts.get("create_indexed_vertex")
return self.gremlin(script, params)
def update_indexed_vertex(self, _id, data, index_name, keys=None):
"""
Updates an indexed vertex and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script, params)
# Model Proxy - Edge
def create_indexed_edge(self, outV, label, inV, data, index_name, keys=None):
"""
Creates a edge, indexes it, and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
edge_params = dict(outV=outV, label=label, inV=inV, label_var=self.config.label_var)
params = dict(data=data, index_name=index_name, keys=keys)
params.update(edge_params)
script = self.scripts.get("create_indexed_edge")
return self.gremlin(script, params)
def update_indexed_edge(self, _id, data, index_name, keys=None):
"""
Updates an indexed edge and returns the Response.
:param _id: Edge ID.
:type _id: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: Neo4jResponse
"""
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script, params)
# Metadata
def set_metadata(self, key, value):
"""
Sets the metadata key to the supplied value.
:param key: Metadata key
:type key: str
:param value: Metadata value.
:type value: str, int, or list
:rtype: Neo4jResponse
"""
script = self.scripts.get("set_metadata")
params = dict(key=key, value=value)
return self.gremlin(script, params)
def get_metadata(self, key, default_value=None):
"""
Returns the value of metadata for the key.
:param key: Metadata key
:type key: str
:param default_value: Default value to return if the key is not found.
:type default_value: str, int, or list
:rtype: Neo4jResponse
"""
script = self.scripts.get("get_metadata")
params = dict(key=key, default_value=default_value)
return self.gremlin(script, params)
def remove_metadata(self, key):
"""
Removes the metadata key and value.
:param key: Metadata key
:type key: str
:rtype: Neo4jResponse
"""
script = self.scripts.get("remove_metadata")
params = dict(key=key)
return self.gremlin(script, params)
# Private
def _remove_null_values(self, data):
"""Removes null property values because they aren't valid in Neo4j."""
# Neo4j Server uses PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
data = data or {}
clean_data = [(k, data[k]) for k in data if data[k] is not None] # Python 3
return dict(clean_data)
def _get_index_results(self, index_name, resp):
"""
Returns the index from a dict of indicies.
"""
if resp.content and index_name in resp.content:
result = resp.content[index_name]
return Neo4jResult(result, self.config)
# Batch related
def _placeholder(self, _id):
pattern = "^{.*}$"
match = re.search(pattern, str(_id))
if match:
placeholder = match.group()
return placeholder
def _build_vertex_path(self, _id, *args):
# if the _id is a placeholder, return the placeholder;
# othewise, return a normal vertex path
placeholder = self._placeholder(_id)
if placeholder:
segments = [placeholder]
else:
segments = [vertex_path, _id]
segments = segments + list(args)
return build_path(*segments)
def _build_vertex_uri(self, _id, *args):
placeholder = self._placeholder(_id)
if placeholder:
return placeholder
root_uri = self.config.root_uri.rstrip("/")
segments = [vertex_path, _id] + list(args)
path = build_path(*segments)
uri = "%s/%s" % (root_uri, path)
return uri
def _build_edge_path(self, _id):
# if the _id is a placeholder, return the placeholder;
# othewise, return a normal edge path
return self._placeholder(_id) or build_path(edge_path, _id)
def _build_edge_uri(self, _id):
pass
class Neo4jClient(Client):
"""
Low-level client that sends a request to Neo4j Server and returns a response.
:param config: Optional Config object. Defaults to default Config.
:type config: Config
:ivar config: Config object.
:ivar scripts: GroovyScripts object.
:ivar type_system: JSONTypeSystem object.
:ivar request: Neo4jRequest object.
:ivar message: RequestMessage object.
Example:
>>> from bulbs.neo4jserver import Neo4jClient
>>> client = Neo4jClient()
>>> script = client.scripts.get("get_vertices")
>>> response = client.gremlin(script, params=None)
>>> result = response.results.next()
"""
#: Default URI for the database.
default_uri = NEO4J_URI
def __init__(self, config=None):
self.config = config or Config(self.default_uri)
self.registry = Registry(self.config)
# Neo4j supports Gremlin so include the Gremlin-Groovy script library
self.scripts = GroovyScripts()
# Also include the Neo4j Server-specific Gremlin-Groovy scripts
scripts_file = get_file_path(__file__, "gremlin.groovy")
self.scripts.update(scripts_file)
# Add it to the registry. This allows you to have more than one scripts namespace.
self.registry.add_scripts("gremlin", self.scripts)
self.type_system = JSONTypeSystem()
self.request = Neo4jRequest(self.config, self.type_system.content_type)
self.message = RequestMessage(self.config, self.scripts)
#: Gremlin
def gremlin(self, script, params=None):
"""
Executes a Gremlin script and returns the Response.
:param script: Gremlin script to execute.
:type script: str
:param params: Param bindings for the script.
:type params: dict
:rtype: Neo4jResponse
"""
message = self.message.gremlin(script,params)
return self.request.send(message)
# Cypher
def cypher(self, query, params=None):
"""
Executes a Cypher query and returns the Response.
:param query: Cypher query to execute.
:type query: str
:param params: Param bindings for the query.
:type params: dict
:rtype: Neo4jResponse
"""
message = self.message.cypher(query,params)
resp = self.request.send(message)
# Cypher data hack
resp.results = (self.result_class(result[0], self.config) for result in resp.results.data)
resp.total_size = len(resp.results.data)
return resp
#: Vertex Proxy
def create_vertex(self, data):
"""
Creates a vertex and returns the Response.
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.vertex_index
return self.create_indexed_vertex(data,index_name,keys=None)
message = self.message.create_vertex(data)
return self.request.send(message)
def get_vertex(self, _id):
"""
Gets the vertex with the _id and returns the Response.
:param data: Vertex ID.
:type data: int
:rtype: Neo4jResponse
"""
message = self.message.get_vertex(_id)
return self.request.send(message)
def update_vertex(self, _id, data):
"""
Updates the vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.vertex_index
return self.update_indexed_vertex(_id,data,index_name,keys=None)
message = self.message.update_vertex(_id,data)
return self.request.send(message)
def delete_vertex(self, _id):
"""
Deletes a vertex with the _id and returns the Response.
:param _id: Vertex ID.
:type _id: dict
:rtype: Neo4jResponse
"""
message = self.message.delete_vertex(_id)
return self.request.send(message)
#: Edge Proxy
def create_edge(self, outV, label, inV, data={}):
"""
Creates a edge and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.edge_index
return self.create_indexed_edge(outV,label,inV,data,index_name,keys=None)
message = self.message.create_edge(outV,label,inV,data)
return self.request.send(message)
def get_edge(self, _id):
"""
Gets the edge with the _id and returns the Response.
:param data: Edge ID.
:type data: int
:rtype: Neo4jResponse
"""
message = self.message.get_edge(_id)
return self.request.send(message)
def update_edge(self, _id, data):
"""
Updates the edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:param data: Property data.
:type data: dict
:rtype: Neo4jResponse
"""
if self.config.autoindex is True:
index_name = self.config.edge_index
return self.update_indexed_edge(_id,data,index_name,keys=None)
message = self.message.update_edge(_id, data)
return self.request.send(message)
def delete_edge(self, _id):
"""
Deletes a edge with the _id and returns the Response.
:param _id: Edge ID.
:type _id: dict
:rtype: Neo4jResponse
"""
message = self.message.delete_edge(_id)
return self.request.send(message)
# Vertex Container
def outE(self, _id, label=None):
"""
Returns the outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
message = self.message.outE(_id,label)
return self.request.send(message)
def inE(self, _id, label=None):
"""
Returns the incoming edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
message = self.message.inE(_id,label)
return self.request.send(message)
def bothE(self, _id, label=None):
"""
Returns the incoming and outgoing edges of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
message = self.message.bothE(_id,label)
return self.request.send(message)
def outV(self, _id, label=None):
"""
Returns the out-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
message = self.message.outV(_id,label)
return self.request.send(message)
def inV(self, _id, label=None):
"""
Returns the in-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
message = self.message.inV(_id,label)
return self.request.send(message)
def bothV(self, _id, label=None):
"""
Returns the incoming- and outgoing-adjacent vertices of the vertex.
:param _id: Vertex ID.
:type _id: dict
:param label: Optional edge label. Defaults to None.
:type label: str
:rtype: Neo4jResponse
"""
message = self.message.bothV(_id,label)
return self.request.send(message)
#: Index Proxy - Vertex
def create_vertex_index(self, index_name, *args, **kwds):
"""
Creates a vertex index with the specified params.
:param index_name: Name of the index to create.
:type index_name: str
:rtype: Neo4jResponse
"""
message = self.message.create_vertex_index(index_name,*args,**kwds)
resp = self.request.send(message)
resp._set_index_name(index_name)
return resp
def get_vertex_indices(self):
"""
Returns a map of all the vertex indices.
:rtype: Neo4jResponse
"""
message = self.message.get_vertex_indices()
return self.request.send(message)
def get_vertex_index(self, index_name):
"""
Returns the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
resp = self.get_vertex_indices()
resp.results = self._get_index_results(index_name,resp)
if resp.results:
resp._set_index_name(index_name)
return resp
def delete_vertex_index(self, index_name):
"""
Deletes the vertex index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
message = self.message.delete_vertex_index(index_name)
return self.request.send(message)
# Index Proxy - Edge
def create_edge_index(self, index_name, *args, **kwds):
"""
Creates a edge index with the specified params.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
message = self.message.create_edge_index(index_name,*args,**kwds)
resp = self.request.send(message)
resp._set_index_name(index_name)
return resp
def get_edge_indices(self):
"""
Returns a map of all the vertex indices.
:rtype: Neo4jResponse
"""
message = self.message.get_edge_indices()
return self.request.send(message)
def get_edge_index(self, index_name):
"""
Returns the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
resp = self.get_edge_indices()
resp.results = self._get_index_results(index_name, resp)
if resp.results:
resp._set_index_name(index_name)
return resp
def delete_edge_index(self, index_name):
"""
Deletes the edge index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:rtype: Neo4jResponse
"""
message = self.message.delete_edge_index(index_name)
return self.request.send(message)
# Index Container - Vertex
def put_vertex(self, index_name, key, value, _id):
"""
Adds a vertex to the index with the index_name.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Vertex ID
:type _id: int
:rtype: Neo4jResponse
"""
message = self.message.put_vertex(index_name,key,value,_id)
return self.request.send(message)
def lookup_vertex(self, index_name, key, value):
"""
Returns the vertices indexed with the key and value.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
message = self.message.lookup_vertex(index_name,key,value)
return self.request.send(message)
def query_vertex(self, index_name, params):
"""
Returns the vertices for the index query.
:param index_name: Name of the index.
:type index_name: str
:param params: Query params.
:type params: dict
:rtype: Neo4jResponse
"""
message = self.message.query_vertex(index_name,params)
return self.request.send(message)
def remove_vertex(self, index_name, _id, key=None, value=None):
"""
Removes a vertex from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
message = self.message.remove_vertex(index_name,_id,key,value)
return self.request.send(message)
# Index Container - Edge
def put_edge(self, index_name, key, value, _id):
"""
Adds an edge to the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:param _id: Edge ID
:type _id: int
:rtype: Neo4jResponse
"""
message = self.message.put_edge(index_name,key,value,_id)
return self.request.send(message)
def lookup_edge(self, index_name, key, value):
"""
Looks up an edge in the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param key: Name of the key.
:type key: str
:param value: Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
message = self.message.lookup_edge(index_name,key,value)
return self.request.send(message)
def query_edge(self, index_name, params):
"""
Queries for an edge in the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param params: Query params.
:type params: dict
:rtype: Neo4jResponse
"""
message = self.message.query_edge(index_name,params)
return self.request.send(message)
def remove_edge(self, index_name, _id, key=None, value=None):
"""
Removes an edge from the index and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param _id: Edge ID
:type _id: int
:param key: Optional. Name of the key.
:type key: str
:param value: Optional. Value of the key.
:type value: str
:rtype: Neo4jResponse
"""
message = self.message.remove_edge(index_name,_id,key,value)
return self.request.send(message)
# Model Proxy - Vertex
def create_indexed_vertex(self, data, index_name, keys=None):
"""
Creates a vertex, indexes it, and returns the Response.
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: Neo4jResponse
"""
message = self.message.create_indexed_vertex(data,index_name,keys)
return self.request.send(message)
# Batch try...
#def create_indexed_vertex(self,data,index_name,keys=None):
# """Creates a vertex, indexes it, and returns the Response."""
# batch = Neo4jBatch(self.client)
# placeholder = batch.add(self.message.create_vertex(data))
# for key in keys:
# value = data.get(key)
# if value is None: continue
# batch.add(self.message.put_vertex(index_name,key,value,placeholder))
# resp = batch.send()
# #for result in resp.results:
def update_indexed_vertex(self, _id, data, index_name, keys=None):
"""
Updates an indexed vertex and returns the Response.
:param index_name: Name of the index.
:type index_name: str
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index.
:type keys: list
:rtype: Neo4jResponse
"""
message = self.message.update_indexed_vertex(_id,data,index_name,keys)
return self.request.send(message)
# Model Proxy - Edge
def create_indexed_edge(self, outV, label, inV, data, index_name, keys=None):
"""
Creates a edge, indexes it, and returns the Response.
:param outV: Outgoing vertex ID.
:type outV: int
:param label: Edge label.
:type label: str
:param inV: Incoming vertex ID.
:type inV: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: Neo4jResponse
"""
message = self.message.create_indexed_edge(outV,label,inV,data,index_name,keys)
return self.request.send(message)
def update_indexed_edge(self, _id, data, index_name, keys=None):
"""
Updates an indexed edge and returns the Response.
:param _id: Edge ID.
:type _id: int
:param data: Property data.
:type data: dict
:param index_name: Name of the index.
:type index_name: str
:param keys: Property keys to index. Defaults to None (indexes all properties).
:type keys: list
:rtype: Neo4jResponse
"""
message = self.message.update_indexed_edge(_id, data, index_name, keys)
return self.request.send(message)
# Batch
def batch(self, messages):
path = "batch"
params = messages
return self.request.post(path, params)
# Metadata
def get_metadata(self, key, default_value=None):
script = self.scripts.get("get_metadata")
params = dict(key=key, default_value=default_value)
return self.gremlin(script, params)
def set_metadata(self, key, value):
script = self.scripts.get("set_metadata")
params = dict(key=key, value=value)
return self.gremlin(script, params)
def remove_metadata(self, key):
script = self.scripts.get("remove_metadata")
params = dict(key=key)
return self.gremlin(script, params)
# Private
def _get_index_results(self, index_name, resp):
"""
Returns the index from a map of indicies.
"""
if resp.content and index_name in resp.content:
result = resp.content[index_name]
return Neo4jResult(result, self.config)
class Neo4jResource(Resource):
vertex_path = "node"
edge_path = "relationships"
index_path = "index"
gremlin_path = "ext/GremlinPlugin/graphdb/execute_script"
cypher_path = "ext/CypherPlugin/graphdb/execute_query"
#cypher_path = "cypher"
def __init__(self, config):
"""
Initializes a resource object.
:param root_uri: the base URL of Rexster.
"""
self.config = config
self.registry = Registry(config)
self.scripts = Scripts()
dir_name = os.path.dirname(__file__)
self.scripts.override(get_file_path(dir_name, "gremlin.groovy"))
self.registry.add_scripts("gremlin", self.scripts)
self.type_system = self._get_type_system()
self.request = Neo4jRequest(config, self.type_system.content_type)
# Gremlin
def gremlin(self, script, params=None):
params = dict(script=script, params=params)
return self.request.post(self.gremlin_path, params)
# Cypher
def cypher(self, query, params=None):
params = dict(query=query, params=params)
return self.request.post(self.cypher_path, params)
# Vertex Proxy
def create_vertex(self, data):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.vertex_autoindex
return self.create_indexed_vertex(data, index_name, keys=None)
return self.request.post(self.vertex_path, data)
def get_vertex(self, _id):
path = build_path(self.vertex_path, _id)
return self.request.get(path, params=None)
def update_vertex(self, _id, data):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.vertex_autoindex
return self.update_indexed_vertex(_id, data, index_name, keys=None)
path = build_path(self.vertex_path, _id, "properties")
return self.request.put(path, data)
def delete_vertex(self, _id):
# Neo4j requires you delete all adjacent edges first.
# But the Neo4jServer DELETE URI doesn't do this so
# I created a Gremlin method for it. - James
params = dict(_id=_id)
script = self.scripts.get("delete_vertex")
return self.gremlin(script, params)
# Edge Proxy
def create_edge(self, outV, label, inV, data={}):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.edge_autoindex
return self.create_indexed_edge(outV,
label,
inV,
data,
index_name,
keys=None)
path = build_path(self.vertex_path, outV, self.edge_path)
inV_uri = "%s/node/%s" % (self.config.root_uri.rstrip("/"), inV)
params = {'to': inV_uri, 'type': label, 'data': data}
return self.request.post(path, params)
def get_edge(self, _id):
path = build_path("relationship", _id)
return self.request.get(path, params=None)
def update_edge(self, _id, data):
data = self._remove_null_values(data)
if self.config.autoindex is True:
index_name = self.config.edge_autoindex
return self.update_indexed_edge(_id, data, index_name, keys=None)
path = build_path("relationship", _id, "properties")
return self.request.put(path, data)
def delete_edge(self, _id):
# note relationship path is singular, not plural
path = build_path("relationship", _id)
return self.request.delete(path, params=None)
# Vertex Container
def outE(self, _id, label=None):
"""Return the outgoing edges of the vertex."""
script = self.scripts.get('outE')
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def inE(self, _id, label=None):
"""Return the incoming edges of the vertex."""
script = self.scripts.get('inE')
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def bothE(self, _id, label=None):
"""Return all incoming and outgoing edges of the vertex."""
script = self.scripts.get('bothE')
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def outV(self, _id, label=None):
"""Return the out-adjacent vertices to the vertex."""
script = self.scripts.get('outV')
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def inV(self, _id, label=None):
"""Return the in-adjacent vertices of the vertex."""
script = self.scripts.get('inV')
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
def bothV(self, _id, label=None):
"""Return all incoming- and outgoing-adjacent vertices of vertex."""
script = self.scripts.get('bothV')
params = dict(_id=_id, label=label)
return self.gremlin(script, params)
# Index Proxy - Vertex
def create_vertex_index(self, index_name, *args, **kwds):
index_type = kwds.pop("index_type", "exact")
provider = kwds.pop("provider", "lucene")
#keys = kwds.pop("keys",None)
#keys = json.dumps(keys) if keys else "null"
#config = {'type':index_type,'provider':provider,'keys':str(keys)}
config = {'type': index_type, 'provider': provider}
path = build_path(self.index_path, "node")
params = dict(name=index_name, config=config)
return self.request.post(path, params)
def get_vertex_indices(self):
# returns a map of indices
path = build_path(self.index_path, "node")
return self.request.get(path, params=None)
def get_vertex_index(self, index_name):
resp = self.get_vertex_indices()
resp.results = self._get_index_results(index_name, resp)
return resp
def delete_vertex_index(self, name):
path = build_path(self.index_path, "node", name)
return self.request.delete(path, params=None)
# Index Proxy - Edge
def create_edge_index(self, index_name, *args, **kwds):
path = build_path(self.index_path, "relationship")
params = dict(name=index_name)
return self.request.post(path, params)
def get_edge_indices(self):
path = build_path(self.index_path, "relationship")
return self.request.get(path, params=None)
def get_edge_index(self, index_name):
resp = self.get_edge_indices()
resp.results = self._get_index_results(index_name, resp)
return resp
def delete_edge_index(self, name):
pass
def _get_index_results(self, index_name, resp):
# this is pretty much a hack becuase the way neo4j does this is inconsistent
results = None # for clarity
content = resp.content
if content and index_name in content:
result = content[index_name]
result['name'] = index_name
results = Neo4jResult(result)
return results
# Model Proxy - Vertex
def create_indexed_vertex(self, data, index_name, keys=None):
data = self._remove_null_values(data)
params = dict(data=data, index_name=index_name, keys=keys)
script = self.scripts.get("create_indexed_vertex")
return self.gremlin(script, params)
def update_indexed_vertex(self, _id, data, index_name, keys=None):
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_vertex")
return self.gremlin(script, params)
# Model Proxy - Edge
def create_indexed_edge(self,
outV,
label,
inV,
data,
index_name,
keys=None):
data = self._remove_null_values(data)
edge_params = dict(outV=outV, label=label, inV=inV)
params = dict(data=data, index_name=index_name, keys=keys)
params.update(edge_params)
script = self.scripts.get("create_indexed_edge")
return self.gremlin(script, params)
def update_indexed_edge(self, _id, data, index_name, keys=None):
data = self._remove_null_values(data)
params = dict(_id=_id, data=data, index_name=index_name, keys=keys)
script = self.scripts.get("update_indexed_edge")
return self.gremlin(script, params)
# Utils
def warm_cache(self):
script = self.scripts.get('warm_cache')
return self.gremlin(script, params=None)
def _remove_null_values(self, data):
# You could do this at the Model._get_property_data(),
# but this may not be needed for all databases.
# Moreover, Neo4j Server uses PUTs to overwrite all properties so no need
# to worry about deleting props that are being set to null.
clean_data = [(k, v) for k, v in data.items() if v is not None]
return dict(clean_data)
#
# Deprecated
#
# Indexed vertices
def put_vertex(self, name, key, value, _id):
path = build_path(self.index_path, "node", name)
uri = "%s/%s/%d" % (self.config.root_uri, "node", _id)
params = dict(key=key, value=value, uri=uri)
return self.request.post(path, params)
def lookup_vertex(self, name, key, value):
path = build_path(self.index_path, "node", name, key, value)
return self.request.get(path, params=None)
def query_vertex(self, name, params):
path = build_path(self.index_path, "node", name)
return self.request.get(path, params)
def remove_vertex_from_index(self, name, _id, key=None, value=None):
#if key is not None and value is not None:
# path = build_path("node",name,key,value,_id)
#elif key is not None:
# path = build_path("node",name,key,_id)
#else:
# path = build_path("node",name,_id)
path = build_path("node", name, key, value, _id)
return self.request.delete(path, params=None)
def put_edge(self, name, key, value, _id):
path = build_path(self.index_path, "relationship", name)
uri = "%s/%s/%d" % (self.config.root_uri, "relationship", _id)
params = dict(key=key, value=value, uri=uri)
return self.request.post(path, params)
def _get_type_system(self):
type_system_map = dict(json=JSONTypeSystem)
type_system = type_system_map[self.config.type_system]
return type_system()