From 45d36f36ad0aa45040e997f53c465b034d49d1d9 Mon Sep 17 00:00:00 2001 From: Rajith Muditha Attapattu Date: Fri, 16 Nov 2007 17:33:34 +0000 Subject: Creating a new tag for M2 final release git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/tags/M2@595753 13f79535-47bb-0310-9956-ffa450edef68 --- Final/python/qpid/queue.py | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Final/python/qpid/queue.py (limited to 'Final/python/qpid/queue.py') diff --git a/Final/python/qpid/queue.py b/Final/python/qpid/queue.py new file mode 100644 index 0000000000..5438b328ab --- /dev/null +++ b/Final/python/qpid/queue.py @@ -0,0 +1,45 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# + +""" +This module augments the standard python multithreaded Queue +implementation to add a close() method so that threads blocking on the +content of a queue can be notified if the queue is no longer in use. +""" + +from Queue import Queue as BaseQueue, Empty, Full + +class Closed(Exception): pass + +class Queue(BaseQueue): + + END = object() + + def close(self): + self.put(Queue.END) + + def get(self, block = True, timeout = None): + result = BaseQueue.get(self, block, timeout) + if result == Queue.END: + # this guarantees that any other waiting threads or any future + # calls to get will also result in a Closed exception + self.put(Queue.END) + raise Closed() + else: + return result -- cgit v1.2.1