def get_resource(self, key, extras):
"""
Get single resource kind and call the
specific kind backend.
:param key: UUID of the resource
:param extras: any extras parameters of the call
:return Resource: OCCI Resource
"""
# Initialize PoP ID from extras
if 'pop_id' in extras:
pop_id = extras['pop_id']
else:
pop_id = None
pop_url = extras['pop_url']
result = None
splitted_url = key[1:].split('/')
# All resources, except PoPs and PoPs links
# require a PoP ID
if splitted_url[0] != 'pop' and not pop_id:
raise HTTPError(400, "Pop-Id missing")
# Get Resource
if len(splitted_url) == 2:
resource_type = splitted_url[0]
uuid = splitted_url[1]
uuids = EPARegistry.get_ids(resource_type, pop_url, pop_id)
if uuid not in uuids:
raise HTTPError(404, "Resource not found")
result = self.get_occi_resource(resource_type, uuid)
# Identify PoP Link
if resource_type == 'pop':
for target_link in epa_glue.get_pop_links_target_uuid(pop_url, uuid):
self.get_link(resource_type,
result,
target_link[0],
target_link[1],
target_link[2])
# Identify switch link
elif resource_type == 'switch':
for target_uuid in odl_glue.get_switch_interfaces_by_switch_id(pop_url, pop_id, uuid):
link_uuid = uuid + '->' + target_uuid
self.get_link(resource_type,
result,
target_uuid,
'switch-interface',
link_uuid)
# Identify switch interface link
# A switch interface is connected to the switch
# and can be connected to an osdev
elif resource_type == 'switch-interface':
switch_uuid = odl_glue.get_switch_by_interface(pop_url, pop_id, uuid)
# Link to the switch
if switch_uuid:
switch_link_uuid = uuid + '->' + switch_uuid
self.get_link(resource_type,
result,
switch_uuid,
'switch',
switch_link_uuid)
osdev_uuid = odl_glue.get_os_dev_by_switch_interface(pop_url, pop_id, uuid)
# Link to the osdev
if osdev_uuid:
osdev_link_uuid = uuid + '->' + osdev_uuid
self.get_link(resource_type,
result,
osdev_uuid,
'osdev',
osdev_link_uuid)
# Identify osdev link
# An osdev can be connected to a switch interface
elif resource_type == 'osdev':
mac = epa_glue.get_mac_by_osdev_uuid(pop_url, pop_id, uuid)
if mac:
switch_interface = odl_glue.get_switch_interface_by_mac(pop_url, pop_id, mac)
if switch_interface:
link_uuid = uuid + '->' + switch_interface
self.get_link(resource_type,
result,
switch_interface,
'switch-interface',
link_uuid)
# Indentify link for all other resources
else:
for target_link in epa_glue.get_links_target_uuid(extras['pop_url'], pop_id, uuid):
link_uuid = uuid + '->' + target_link[0]
self.get_link(resource_type,
result,
target_link[0],
target_link[1],
link_uuid)
# Get Link
elif len(splitted_url) == 3 and splitted_url[1] == 'link':
link_uuid = splitted_url[2]
# Not PoP Link
# Link UUID = source_uuid + '->' + target_uuid
if '->' in link_uuid:
source_type = splitted_url[0]
source_uuid = splitted_url[2].split('->')[0]
target_uuid = splitted_url[2].split('->')[1]
# if source_type is switch
# target type can be only switch interface
if source_type == 'switch':
link_prop = dict()
link_prop['target_type'] = 'switch-interface'
# if source_type is switch
# target type can be switch and eventually osdev
elif source_type == 'switch-interface':
link_prop = dict()
if target_uuid == odl_glue.get_switch_by_interface(pop_url, pop_id, source_uuid):
link_prop['target_type'] = 'switch'
elif target_uuid == odl_glue.get_os_dev_by_switch_interface(pop_url, pop_id, source_uuid):
link_prop['target_type'] = 'osdev'
# if source_type is switch
# and target_uuid is of openflow type
# target_type is a switch
elif source_type == 'osdev' and 'openflow' in target_uuid:
link_prop = dict()
link_prop['target_type'] = 'switch-interface'
else:
link_prop = epa_glue.get_link(extras['pop_url'], pop_id, source_uuid, target_uuid)
# if link_prop is not set
# the required link does not exist
if not link_prop:
raise HTTPError(404, "Resource Not Found")
source_entity = self.get_occi_resource(source_type, source_uuid)
result = self.get_link(source_type,
source_entity,
target_uuid,
link_prop['target_type'],
link_uuid)
# PoP Link
else:
link_result = epa_glue.get_pop_link_source_target(pop_url, link_uuid)
if link_result and len(link_result) == 2:
source = link_result[0]
target = link_result[1]
source_entity = self.get_occi_resource(splitted_url[0], source)
target_entity = self.get_occi_resource(splitted_url[0], target)
result = self.get_occi_link(splitted_url[0] + '_link', link_uuid, source_entity, target_entity)
# If requested resource does not exist
# raise Resource not found exception
if result:
if isinstance(result, Resource) and result.kind.term != 'pop':
EPARegistry.add_pop_id_to_resource(result, pop_id)
EPARegistry.add_pop_id_to_links(result.links, pop_id)
if isinstance(result, Link) and result.kind.term != 'poplink':
EPARegistry.add_pop_id_to_resource(result, pop_id)
EPARegistry.add_pop_id_to_link_source(result, pop_id)
EPARegistry.add_pop_id_to_link_target(result, pop_id)
return result
raise HTTPError(404, 'Resource not found: ' + str(key))
def get_resource_entities(pop_url, pop_id, openstack_types, query):
"""
Retrieve a list of entities and their links
for a given list of types
:param pop_url: Url of PoP DB
:param pop_id: PoP ID
:param openstack_types: list of type
:param query: optional query parameters
:return dict: keys resources' uuids, values resources' properties
"""
results = {}
for resource_type in openstack_types:
# For switches call Opendaylight
if resource_type == 'switch':
for uuid in odl_glue.get_switches_ids(pop_url, pop_id):
entity = EPARegistry.get_occi_resource(resource_type, uuid)
results[uuid] = entity
# For switches' interfaces call Opendaylight
elif resource_type == 'switch-interface':
for uuid in odl_glue.get_switch_interfaces(pop_url, pop_id):
entity = EPARegistry.get_occi_resource(resource_type, uuid)
results[uuid] = entity
# For all others resources query EPA DB
else:
for uuid in epa_glue.get_resource_openstack_ids(pop_url, pop_id, resource_type, query):
entity = EPARegistry.get_occi_resource(resource_type, uuid)
results[uuid] = entity
# Retrieve links for the resources that should be returned
links = {}
for source_uuid in results:
if results[source_uuid].kind.term == 'switch':
for target_uuid in odl_glue.get_switch_interfaces_by_switch_id(pop_url, pop_id, source_uuid):
target_type = 'switch-interface'
link_uuid = source_uuid + '->' + target_uuid
source_entity = results[source_uuid]
kind = source_entity.kind.term + '_link'
target_entity = EPARegistry.get_occi_resource(target_type, target_uuid)
links[link_uuid] = EPARegistry.get_occi_link(kind, link_uuid, source_entity, target_entity)
elif results[source_uuid].kind.term == 'switch-interface':
switch_uuid = odl_glue.get_switch_by_interface(pop_url, pop_id, source_uuid)
if switch_uuid:
switch_type = 'switch'
source_entity = results[source_uuid]
kind = source_entity.kind.term + '_link'
switch_entity = EPARegistry.get_occi_resource(switch_type, switch_uuid)
switch_link_uuid = uuid + '->' + switch_uuid
links[switch_link_uuid] = EPARegistry.get_occi_link(kind, switch_link_uuid,
results[source_uuid], switch_entity)
osdev_uuid = odl_glue.get_os_dev_by_switch_interface(pop_url, pop_id, source_uuid)
if osdev_uuid:
osdev_type = 'osdev'
osdev_entity = EPARegistry.get_occi_resource(osdev_type, osdev_uuid)
osdev_link_uuid = uuid + '->' + osdev_uuid
links[osdev_link_uuid] = EPARegistry.get_occi_link(kind, osdev_link_uuid,
results[source_uuid], osdev_entity)
elif results[source_uuid].kind.term == 'osdev':
mac = epa_glue.get_mac_by_osdev_uuid(pop_url, pop_id, source_uuid)
if mac:
switch_interface = odl_glue.get_switch_interface_by_mac(pop_url, pop_id, mac)
if switch_interface:
target_uuid = switch_interface
target_type = 'switch-interface'
link_uuid = source_uuid + '->' + target_uuid
source_entity = results[source_uuid]
kind = source_entity.kind.term + '_link'
target_entity = EPARegistry.get_occi_resource(target_type, target_uuid)
links[link_uuid] = EPARegistry.get_occi_link(kind, link_uuid, source_entity, target_entity)
else:
for target_link in epa_glue.get_links_target_uuid(pop_url, pop_id, source_uuid):
target_uuid = target_link[0]
target_type = target_link[1]
link_uuid = source_uuid + '->' + target_uuid
source_entity = results[source_uuid]
kind = source_entity.kind.term + '_link'
target_entity = EPARegistry.get_occi_resource(target_type, target_uuid)
links[link_uuid] = EPARegistry.get_occi_link(kind, link_uuid, source_entity, target_entity)
results.update(links)
EPARegistry.add_pop_id_to_resources(results, pop_id)
return results.values()
