diff options
Diffstat (limited to 'python/examples/request-response')
-rwxr-xr-x | python/examples/request-response/client.py | 89 | ||||
-rwxr-xr-x | python/examples/request-response/server.py | 48 | ||||
-rw-r--r-- | python/examples/request-response/verify.in | 2 |
3 files changed, 80 insertions, 59 deletions
diff --git a/python/examples/request-response/client.py b/python/examples/request-response/client.py index 8f7d430d1b..0fcd256d49 100755 --- a/python/examples/request-response/client.py +++ b/python/examples/request-response/client.py @@ -18,18 +18,7 @@ from qpid.queue import Empty def dump_queue(queue_name): - print "Messages queue: " + queue_name - - consumer_tag = queue_name # Use the queue name as the consumer tag - need a unique tag - queue = session.incoming(consumer_tag) - - # Call message_subscribe() to tell the broker to deliver messages - # from the AMQP queue to a local client queue. The broker will - # start delivering messages as soon as message_subscribe() is called. - - session.message_subscribe(queue=queue_name, destination=consumer_tag) - session.message_flow(consumer_tag, 0, 0xFFFFFFFF) - session.message_flow(consumer_tag, 1, 0xFFFFFFFF) + print "Messages on queue: " + queue_name message = 0 @@ -47,25 +36,27 @@ def dump_queue(queue_name): break - # Messages are not removed from the queue until they - # are acknowledged. Using cumulative=True, all messages - # in 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. - - #if message != 0: - # message.complete(cumulative=True) - - #----- Initialization -------------------------------------- + # Set parameters for login -host=len(sys.argv) > 1 and sys.argv[1] or "127.0.0.1" -port=len(sys.argv) > 2 and int(sys.argv[2]) or 5672 +host="127.0.0.1" +port=5672 user="guest" password="guest" -amqp_spec="" +amqp_spec="/usr/share/amqp/amqp.0-10.xml" + +# If an alternate host or port has been specified, use that instead +# (this is used in our unit tests) +# +# If AMQP_SPEC is defined, use it to locate the spec file instead of +# looking for it in the default location. + +if len(sys.argv) > 1 : + host=sys.argv[1] +if len(sys.argv) > 2 : + port=int(sys.argv[2]) try: amqp_spec = os.environ["AMQP_SPEC"] @@ -73,11 +64,11 @@ except KeyError: amqp_spec="/usr/share/amqp/amqp.0-10.xml" # Create a connection. -conn = Connection (connect (host,port), qpid.spec.load(amqp_spec)) -conn.start() +socket = connect(host, port) +connection = Connection (sock=socket, spec=qpid.spec.load(amqp_spec)) +connection.start() +session = connection.session(str(uuid4())) -session_id = str(uuid4()) -session = conn.session(session_id) #----- Main Body -- ---------------------------------------- @@ -85,9 +76,23 @@ session = conn.session(session_id) # same string as the name of the queue and the name of the routing # key. -replyTo = "ReplyTo:" + session_id -session.queue_declare(queue=replyTo, exclusive=True) -session.exchange_bind(exchange="amq.direct", queue=replyTo, binding_key=replyTo) +reply_to = "reply_to:" + session.name +session.queue_declare(queue=reply_to, exclusive=True) +session.exchange_bind(exchange="amq.direct", queue=reply_to, binding_key=reply_to) + +# Create a local queue and subscribe it to the response queue + +local_queue_name = "local_queue" +queue = session.incoming(local_queue_name) + +# Call message_subscribe() to tell the broker to deliver messages from +# the server's reply_to queue to our local client queue. The server +# will start delivering messages as soon as message credit is +# available. + +session.message_subscribe(queue=reply_to, destination=local_queue_name) +session.message_flow(local_queue_name, session.credit_unit.message, 0xFFFFFFFF) +session.message_flow(local_queue_name, session.credit_unit.byte, 0xFFFFFFFF) # Send some messages to the server's request queue @@ -96,16 +101,20 @@ lines = ["Twas brilling, and the slithy toves", "All mimsy were the borogroves,", "And the mome raths outgrabe."] -for ln in lines: - print "Request: " + ln - mp = session.message_properties() - mp.reply_to = session.reply_to("amq.direct", replyTo) - dp = session.delivery_properties(routing_key="request") - session.message_transfer("amq.direct", None, None, Message(mp,dp,ln)) +# We will use the same reply_to and routing key +# for each message + +message_properties = session.message_properties() +message_properties.reply_to = session.reply_to("amq.direct", reply_to) +delivery_properties = session.delivery_properties(routing_key="request") + +for line in lines: + print "Request: " + line + session.message_transfer(destination="amq.direct", message=Message(message_properties, delivery_properties, line)) -# Now see what messages the server sent to our replyTo queue +# Now see what messages the server sent to our reply_to queue -dump_queue(replyTo) +dump_queue(reply_to) #----- Cleanup ------------------------------------------------ diff --git a/python/examples/request-response/server.py b/python/examples/request-response/server.py index 4377571248..7b182723b9 100755 --- a/python/examples/request-response/server.py +++ b/python/examples/request-response/server.py @@ -4,6 +4,7 @@ Server for a client/server example """ + import qpid import sys import os @@ -22,31 +23,42 @@ def respond(session, request): message_properties = request.get("message_properties") reply_to = message_properties.reply_to if reply_to == None: - raise Exception("reply to property needs to be there") - - props = session.delivery_properties(routing_key=reply_to["routing_key"]) - session.message_transfer(reply_to["exchange"],None, None, Message(props,request.body.upper())) + raise Exception("This message is missing the 'reply_to' property, which is required") + + props = session.delivery_properties(routing_key=reply_to["routing_key"]) + session.message_transfer(destination=reply_to["exchange"], message=Message(props,request.body.upper())) #----- Initialization -------------------------------------- + # Set parameters for login -host=len(sys.argv) > 1 and sys.argv[1] or "127.0.0.1" -port=len(sys.argv) > 2 and int(sys.argv[2]) or 5672 + +host="127.0.0.1" +port=5672 user="guest" password="guest" -amqp_spec="" +amqp_spec="/usr/share/amqp/amqp.0-10.xml" + +# If an alternate host or port has been specified, use that instead +# (this is used in our unit tests) +# +# If AMQP_SPEC is defined, use it to locate the spec file instead of +# looking for it in the default location. + +if len(sys.argv) > 1 : + host=sys.argv[1] +if len(sys.argv) > 2 : + port=int(sys.argv[2]) try: amqp_spec = os.environ["AMQP_SPEC"] except KeyError: amqp_spec="/usr/share/amqp/amqp.0-10.xml" -# Create a connection. -conn = Connection (connect (host,port), qpid.spec.load(amqp_spec)) -conn.start() - -session_id = str(uuid4()) -session = conn.session(session_id) +socket = connect(host, port) +connection = Connection (sock=socket, spec=qpid.spec.load(amqp_spec)) +connection.start() +session = connection.session(str(uuid4())) #----- Main Body -- ---------------------------------------- @@ -55,11 +67,11 @@ session = conn.session(session_id) session.queue_declare(queue="request", exclusive=True) session.exchange_bind(exchange="amq.direct", queue="request", binding_key="request") -dest = "request_destination" +local_queue_name = "local_queue" -session.message_subscribe(queue="request", destination=dest) -session.message_flow(dest, 0, 0xFFFFFFFF) -session.message_flow(dest, 1, 0xFFFFFFFF) +session.message_subscribe(queue="request", destination=local_queue_name) +session.message_flow(local_queue_name, session.credit_unit.message, 0xFFFFFFFF) +session.message_flow(local_queue_name, session.credit_unit.byte, 0xFFFFFFFF) # Remind the user to start the client program @@ -70,7 +82,7 @@ sys.stdout.flush() # Respond to each request -queue = session.incoming(dest) +queue = session.incoming(local_queue_name) # If we get a message, send it back to the user (as indicated in the # ReplyTo property) diff --git a/python/examples/request-response/verify.in b/python/examples/request-response/verify.in index 8d7f732ec8..6c24366722 100644 --- a/python/examples/request-response/verify.in +++ b/python/examples/request-response/verify.in @@ -3,7 +3,7 @@ Request: Twas brilling, and the slithy toves Request: Did gyre and gimble in the wabe. Request: All mimsy were the borogroves, Request: And the mome raths outgrabe. -Messages queue: ReplyTo: +Messages on queue: reply_to: Response: TWAS BRILLING, AND THE SLITHY TOVES Response: DID GYRE AND GIMBLE IN THE WABE. Response: ALL MIMSY WERE THE BOROGROVES, |