def __init__(self):
self._dc = None
try:
self._dc = sdb.create_dc()
except SystemError:
raise SDBBaseError("Failed to alloc data center object",
const.SDB_OOM)
def __init__(self):
"""constructor of cursor
Exceptions:
pysequoiadb.error.SDBBaseError
"""
self._cursor = None
try:
self._cursor = sdb.create_cursor()
except SystemError:
raise SDBBaseError("Failed to alloc cursor", const.SDB_OOM)
def __init__(self):
"""invoked when a new object is producted.
Exceptions:
pysequoiadb.error.SDBBaseError
"""
#'cs' is short for collection space
try:
self._cs = sdb.create_cs()
except SystemError:
raise SDBBaseError("Failed to alloc collection space", const.SDB_OOM)
def __init__(self, client):
"""constructor of replica node
Exceptions:
pysequoiadb.error.SDBBaseError
"""
self._client = client
try:
self._node = sdb.create_node()
except SystemError:
raise SDBBaseError("Failed to alloc node", const.SDB_OOM)
def next(self):
"""Return the next document of current cursor, and move forward.
Return values:
a dict object of record
Exceptions:
pysequoiadb.error.SDBBaseError
pysequoiadb.error.SDBEndOfCursor
"""
try:
rc, bson_string = sdb.cr_next(self._cursor)
if const.SDB_OK != rc:
if const.SDB_DMS_EOC == rc:
raise SDBEndOfCursor
else:
raise SDBBaseError("Failed to get next record", rc)
else:
record, size = bson._bson_to_dict(bson_string, dict, False,
bson.OLD_UUID_SUBTYPE, True)
except SDBBaseError:
raise
return record