def delete_row(table, rowKey):
"""
deletes a complete row (rowKey) from a given table
"""
hasBinaryFiles = ["Elements"]
hasGraphData = ["Elements"]
transport = roboearth.openDBTransport()
client = transport['client']
try:
client.deleteAllRow(table, rowKey)
roboearth.closeDBTransport(transport)
if table in hasBinaryFiles:
hdfs.rm_dir(
os.path.join(roboearth.UPLOAD_DIR, table.lower(),
rowKey.replace('.', '/')))
if table in hasGraphData:
sesame.rm(rowKey, table)
except IOError, err:
roboearth.closeDBTransport(transport)
print table, rowKey
raise roboearth.DBWriteErrorException("Can't delete data: " +
err.__str__())
def update(id_, data, author):
"""
update an existing object description at the database
id_ : complete identifier (primary key) of the object
data: dictionary with the updated data ('description' (human readable) and
'object_description' (OWL))
author: author of the description
"""
transport = roboearth.openDBTransport()
client = transport['client']
try:
mutation_list = []
if data.has_key('description'):
mutation_list.append(
Mutation(column="info:description", value=data['description']))
if data.has_key('object_description'):
mutation_list.append(
Mutation(column="owl:description",
value=data['object_description']))
client.mutateRow("Elements", id_,
[Mutation(column="info:modified_by", value=author)] +
mutation_list)
if data.has_key('object_description'):
sesame.rm(id_, "Elements")
sesame.set(data['object_description'], id_, "Elements")
# push update to subscribers
scanner = client.scannerOpenWithPrefix("Elements", id_, [])
res = client.scannerGet(scanner)
for r in res[0].columns:
if r.startswith("subscriber:"):
client.mutateRow(
"Users", res[0].columns[r].value,
[Mutation(column="news:", value="Objects#" + id_)])
client.scannerClose(scanner)
roboearth.closeDBTransport(transport)
return True
except (IOError, IllegalArgument), err:
raise roboearth.DBWriteErrorException(
"Can't write data to Elements table: " + err.__str__())
def update(id_, data, author):
"""
update an existing object description at the database
id_ : complete identifier (primary key) of the object
data: dictionary with the updated data ('description' (human readable) and
'object_description' (OWL))
author: author of the description
"""
transport = roboearth.openDBTransport()
client = transport['client']
try:
mutation_list = [ ]
if data.has_key('description'):
mutation_list.append(Mutation(column="info:description", value=data['description']))
if data.has_key('object_description'):
mutation_list.append(Mutation(column="owl:description", value=data['object_description']))
client.mutateRow("Elements", id_,
[Mutation(column="info:modified_by", value=author)] +
mutation_list)
if data.has_key('object_description'):
sesame.rm(id_, "Elements")
sesame.set(data['object_description'], id_, "Elements")
# push update to subscribers
scanner = client.scannerOpenWithPrefix("Elements", id_, [ ])
res = client.scannerGet(scanner)
for r in res[0].columns:
if r.startswith("subscriber:"):
client.mutateRow("Users", res[0].columns[r].value,
[Mutation(column="news:", value="Objects#"+id_)])
client.scannerClose(scanner)
roboearth.closeDBTransport(transport)
return True
except (IOError, IllegalArgument), err:
raise roboearth.DBWriteErrorException("Can't write data to Elements table: " + err.__str__())
def delete_row(table, rowKey):
"""
deletes a complete row (rowKey) from a given table
"""
hasBinaryFiles = ["Elements"]
hasGraphData = ["Elements"]
transport = roboearth.openDBTransport()
client = transport['client']
try:
client.deleteAllRow(table, rowKey)
roboearth.closeDBTransport(transport)
if table in hasBinaryFiles:
hdfs.rm_dir(os.path.join(roboearth.UPLOAD_DIR, table.lower(), rowKey.replace('.', '/')))
if table in hasGraphData:
sesame.rm(rowKey, table)
except IOError, err:
roboearth.closeDBTransport(transport)
print table, rowKey
raise roboearth.DBWriteErrorException("Can't delete data: " + err.__str__())
def set(id_, class_, description, object_description, author, files=None):
"""
write a object description to the database
id_ : object identifier
class_: object class
description: human readable description
object_description: owl description
author: author of the description
files: dictionary of binary files (file identifier : file)
"""
logging.basicConfig(filename='example.log', level=logging.DEBUG)
transport = roboearth.openDBTransport()
client = transport['client']
identifier = class_.replace(' ',
'').lower().strip('.') + '.' + id_.replace(
' ', '').lower().strip('.')
#create paths
path = class_.replace(' ', '').lower().strip('.') + '.' + id_.replace(
' ', '').lower().strip('.')
wwwPath = roboearth.DOMAIN + os.path.join("data/", 'elements/',
path.replace('.', '/'))
path = os.path.join(roboearth.UPLOAD_DIR, 'elements/',
path.replace('.', '/'))
try:
# object already exists
if get(query=identifier, exact=True):
return None
# upload files and build file mutation list for hbase operation
file_mutation_list = []
if files:
for file_ID, file_ in files.items():
hdfs.upload_file(file_, path)
file_mutation_list.append(
Mutation(column="file:" + file_ID,
value=wwwPath + "/" + file_.name))
# now write to hbase
client.mutateRow("Elements", identifier, [
Mutation(column="info:description", value=description),
Mutation(column="info:author", value=author),
Mutation(column="info:rating", value="1"),
Mutation(column="info:type", value="object"),
Mutation(column="owl:description", value=object_description)
] + file_mutation_list)
#write data to sesame
sesame_ret = sesame.set(object_description, identifier, "elements")
if sesame_ret != "0":
hbase_op.delete_row("Elements", identifier)
print 'raising shit'
raise IllegalArgument(sesame_ret)
client.mutateRow("Users", author,
[Mutation(column="element:" + identifier, value="")])
roboearth.closeDBTransport(transport)
#if not roboearth.local_installation:
# roboearth.send_twitter_message("upload", "Object", identifier, author)
return {
'id': identifier,
'description': description,
'object_description': object_description
}
except (IOError, IllegalArgument), err:
try: # try clean up
hdfs.rm_dir(path)
hbase_op.delete_row("Elements", identifier)
sesame.rm(identifier, "Elements")
except:
sys.exc_clear()
import traceback
logging.info(traceback.format_exc())
raise roboearth.DBWriteErrorException(
"Can't write data to Object table: HEREEEEE " + err.__str__())
def set(id_, class_, description, object_description, author, files=None):
"""
write a object description to the database
id_ : object identifier
class_: object class
description: human readable description
object_description: owl description
author: author of the description
files: dictionary of binary files (file identifier : file)
"""
logging.basicConfig(filename='example.log',level=logging.DEBUG)
transport = roboearth.openDBTransport()
client = transport['client']
identifier = class_.replace(' ', '').lower().strip('.') + '.' + id_.replace(' ', '').lower().strip('.')
#create paths
path = class_.replace(' ', '').lower().strip('.') + '.' +id_.replace(' ', '').lower().strip('.')
wwwPath = roboearth.DOMAIN + os.path.join("data/", 'elements/', path.replace('.', '/'))
path = os.path.join(roboearth.UPLOAD_DIR, 'elements/', path.replace('.', '/'))
try:
# object already exists
if get(query=identifier, exact=True):
return None
# upload files and build file mutation list for hbase operation
file_mutation_list = [ ]
if files:
for file_ID, file_ in files.items():
hdfs.upload_file(file_, path)
file_mutation_list.append(Mutation(column="file:"+file_ID, value=wwwPath+"/"+file_.name))
# now write to hbase
client.mutateRow("Elements", identifier,
[Mutation(column="info:description", value=description),
Mutation(column="info:author", value=author),
Mutation(column="info:rating", value="1"),
Mutation(column="info:type", value="object"),
Mutation(column="owl:description", value=object_description)]+
file_mutation_list)
#write data to sesame
sesame_ret = sesame.set(object_description, identifier, "elements")
if sesame_ret != "0":
hbase_op.delete_row("Elements", identifier)
print 'raising shit'
raise IllegalArgument(sesame_ret)
client.mutateRow("Users", author,
[Mutation(column="element:"+identifier, value="")])
roboearth.closeDBTransport(transport)
#if not roboearth.local_installation:
# roboearth.send_twitter_message("upload", "Object", identifier, author)
return {'id' : identifier, 'description' : description, 'object_description' : object_description}
except (IOError, IllegalArgument), err:
try: # try clean up
hdfs.rm_dir(path)
hbase_op.delete_row("Elements", identifier)
sesame.rm(identifier, "Elements")
except:
sys.exc_clear()
import traceback
logging.info(traceback.format_exc())
raise roboearth.DBWriteErrorException("Can't write data to Object table: HEREEEEE " + err.__str__())
