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Diffstat (limited to 'qpid/python/examples/direct/direct_consumer.py')
-rw-r--r-- | qpid/python/examples/direct/direct_consumer.py | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/qpid/python/examples/direct/direct_consumer.py b/qpid/python/examples/direct/direct_consumer.py new file mode 100644 index 0000000000..4e50dfbc2a --- /dev/null +++ b/qpid/python/examples/direct/direct_consumer.py @@ -0,0 +1,75 @@ +#!/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() |