ae154dbc72
* Examples work * setup.py kinda updasted * Fork of txmongo but with new pymongo embedded
94 lines
2.8 KiB
Python
94 lines
2.8 KiB
Python
# Copyright 2009-2012 10gen, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""DEPRECATED - Different managers to handle when cursors are killed after
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they are closed.
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New cursor managers should be defined as subclasses of CursorManager and can be
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installed on a connection by calling
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`pymongo.connection.Connection.set_cursor_manager`.
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.. versionchanged:: 2.1+
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Deprecated.
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"""
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import weakref
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class CursorManager(object):
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"""The default cursor manager.
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This manager will kill cursors one at a time as they are closed.
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"""
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def __init__(self, connection):
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"""Instantiate the manager.
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:Parameters:
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- `connection`: a Mongo Connection
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"""
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self.__connection = weakref.ref(connection)
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def close(self, cursor_id):
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"""Close a cursor by killing it immediately.
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Raises TypeError if cursor_id is not an instance of (int, long).
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:Parameters:
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- `cursor_id`: cursor id to close
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"""
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if not isinstance(cursor_id, int):
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raise TypeError("cursor_id must be an instance of (int, long)")
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self.__connection().kill_cursors([cursor_id])
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class BatchCursorManager(CursorManager):
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"""A cursor manager that kills cursors in batches.
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"""
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def __init__(self, connection):
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"""Instantiate the manager.
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:Parameters:
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- `connection`: a Mongo Connection
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"""
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self.__dying_cursors = []
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self.__max_dying_cursors = 20
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self.__connection = weakref.ref(connection)
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CursorManager.__init__(self, connection)
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def __del__(self):
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"""Cleanup - be sure to kill any outstanding cursors.
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"""
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self.__connection().kill_cursors(self.__dying_cursors)
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def close(self, cursor_id):
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"""Close a cursor by killing it in a batch.
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Raises TypeError if cursor_id is not an instance of (int, long).
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:Parameters:
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- `cursor_id`: cursor id to close
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"""
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if not isinstance(cursor_id, int):
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raise TypeError("cursor_id must be an instance of (int, long)")
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self.__dying_cursors.append(cursor_id)
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if len(self.__dying_cursors) > self.__max_dying_cursors:
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self.__connection().kill_cursors(self.__dying_cursors)
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self.__dying_cursors = []
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