1 files changed, 45 insertions, 0 deletions
diff --git a/Final/python/qpid/queue.py b/Final/python/qpid/queue.py
new file mode 100644
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+++ 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