Python examples

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk@599876 13f79535-47bb-0310-9956-ffa450edef68

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diff --git a/qpid/python/examples/direct/direct_consumer.py b/qpid/python/examples/direct/direct_consumer.py
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+#!/usr/bin/env python
+"""
+ direct_consumer.py
+
+ This AMQP client reads messages from a message
+ queue named "message_queue".
+"""
+
+import qpid
+from qpid.client import Client
+from qpid.content import Content
+from qpid.queue import Empty
+
+
+#----- Initialization --------------------------------------
+
+#  Set parameters for login
+
+host="127.0.0.1"
+port=5672
+amqp_spec="/usr/share/amqp/amqp.0-10-preview.xml"
+user="guest"
+password="guest"
+
+#  Create a client and log in to it.
+
+client = Client(host, port, qpid.spec.load(amqp_spec))
+client.start({"LOGIN": user, "PASSWORD": password})
+
+session = client.session()
+session.session_open()
+
+#----- Read from queue --------------------------------------------
+
+# Now let's create a local client queue and tell it to read
+# incoming messages.
+
+# The consumer tag identifies the client-side queue.
+
+consumer_tag = "consumer1"
+queue = client.queue(consumer_tag)
+
+# Call message_consume() to tell the broker to deliver messages
+# from the AMQP queue to this local client queue. The broker will
+# start delivering messages as soon as message_consume() is called.
+
+session.message_subscribe(queue="message_queue", destination=consumer_tag)
+session.message_flow(consumer_tag, 0, 0xFFFFFFFF)  # Kill these?
+session.message_flow(consumer_tag, 1, 0xFFFFFFFF) # Kill these?
+
+#  Initialize 'final' and 'content', variables used to identify the last message.
+
+final = "That's all, folks!"   # In a message body, signals the last message
+content = ""		       # Content of the last message read
+
+message = None
+while content != final:
+	message = queue.get(timeout=10)
+	content = message.content.body
+	print content
+
+#  Messages are not removed from the queue until they are
+#  acknowledged. Using cumulative=True, all messages from the session
+#  up to and including the one identified by the delivery tag are
+#  acknowledged. This is more efficient, because there are fewer
+#  network round-trips.
+
+message.complete(cumulative=True)
+
+#----- Cleanup ------------------------------------------------
+
+# Clean up before exiting so there are no open threads.
+#
+
+# session.session_close()