From 79c1bec8dd57875c2dca25bcfa500ecbf19aab5e Mon Sep 17 00:00:00 2001 From: Gordon Sim Date: Wed, 19 Dec 2007 16:01:28 +0000 Subject: File rename to better fit the pubsub nomenclature (from jrobie@redhat.com) git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@605599 13f79535-47bb-0310-9956-ffa450edef68 --- python/examples/pubsub/topic_consumer.py | 118 --------------------------- python/examples/pubsub/topic_producer.py | 96 ---------------------- python/examples/pubsub/topic_publisher.py | 80 +++++++++++++++++++ python/examples/pubsub/topic_subscriber.py | 124 +++++++++++++++++++++++++++++ 4 files changed, 204 insertions(+), 214 deletions(-) delete mode 100644 python/examples/pubsub/topic_consumer.py delete mode 100644 python/examples/pubsub/topic_producer.py create mode 100644 python/examples/pubsub/topic_publisher.py create mode 100644 python/examples/pubsub/topic_subscriber.py (limited to 'python/examples') diff --git a/python/examples/pubsub/topic_consumer.py b/python/examples/pubsub/topic_consumer.py deleted file mode 100644 index afe8bba91e..0000000000 --- a/python/examples/pubsub/topic_consumer.py +++ /dev/null @@ -1,118 +0,0 @@ -#!/usr/bin/env python -""" - topic_consumer.py - - This AMQP client reads all messages from the - "news", "weather", "usa", and "europe" queues - created and bound by config_topic_exchange.py. -""" - -import base64 - -import qpid -from qpid.client import Client -from qpid.content import Content -from qpid.queue import Empty - -#----- Functions ------------------------------------------- - -def dump_queue(client, queue_name): - - print "Messages queue: " + queue_name - - consumer_tag = queue_name # Use the queue name as the consumer tag - need a unique tag - queue = client.queue(consumer_tag) - - # Call basic_consume() 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 basic_consume() 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) - - content = "" # Content of the last message read - final = "That's all, folks!" # In a message body, signals the last message - message = 0 - - while content != final: - try: - message = queue.get() - content = message.content.body - print content - except Empty: - if message != 0: - message.complete(cumulative=True) - print "No more messages!" - return - - - # Messages are not removed from the queue until they - # are acknowledged. Using multiple=True, all messages - # in the channel 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="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. - -spec = qpid.spec.load(amqp_spec) -client = Client(host, port, spec) -client.start({"LOGIN": user, "PASSWORD": password}) - -session = client.session() -session_info = session.session_open() -session_id = session_info.session_id - -#----- Main Body -- ---------------------------------------- - - -news = "news" + base64.urlsafe_b64encode(session_id) -weather = "weather" + base64.urlsafe_b64encode(session_id) -usa = "usa" + base64.urlsafe_b64encode(session_id) -europe = "europe" + base64.urlsafe_b64encode(session_id) - -session.queue_declare(queue=news, exclusive=True) -session.queue_declare(queue=weather, exclusive=True) -session.queue_declare(queue=usa, exclusive=True) -session.queue_declare(queue=europe, exclusive=True) - -# Routing keys may be "usa.news", "usa.weather", "europe.news", or "europe.weather". - -# The '#' symbol matches one component of a multipart name, e.g. "#.news" matches -# "europe.news" or "usa.news". - -session.queue_bind(exchange="amq.topic", queue=news, routing_key="#.news") -session.queue_bind(exchange="amq.topic", queue=weather, routing_key="#.weather") -session.queue_bind(exchange="amq.topic", queue=usa, routing_key="usa.#") -session.queue_bind(exchange="amq.topic", queue=europe, routing_key="europe.#") - -# Remind the user to start the topic producer - -print "Queues create - please start the topic producer" - -# Call dump_queue to print messages from each queue - -dump_queue(client, news) -dump_queue(client, weather) -dump_queue(client, usa) -dump_queue(client, europe) - -#----- Cleanup ------------------------------------------------ - -# Clean up before exiting so there are no open threads. - -session.session_close() diff --git a/python/examples/pubsub/topic_producer.py b/python/examples/pubsub/topic_producer.py deleted file mode 100644 index c3b13cd82c..0000000000 --- a/python/examples/pubsub/topic_producer.py +++ /dev/null @@ -1,96 +0,0 @@ -#!/usr/bin/env python -""" - topic_producer.py - - This is a simple AMQP publisher application that uses a - Topic exchange. The publisher specifies the routing key - and the exchange for each message. -""" - -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. - -spec = qpid.spec.load(amqp_spec) -client = Client(host, port, spec) -client.start({"LOGIN": user, "PASSWORD": password}) - -session = client.session() -session.session_open() - -#----- Publish some messages ------------------------------ - -# Create some messages and put them on the broker. Use the -# topic exchange. The routing keys are "usa.news", "usa.weather", -# "europe.news", and "europe.weather". - -final = "That's all, folks!" - -# We'll use the same routing key for all messages in the loop, and -# also for the terminating message. - -# usa.news - -for i in range(5): - message = Content("message " + str(i)) - message["routing_key"] = "usa.news" - session.message_transfer(destination="amq.topic", content=message) - -message = Content(final) -message["routing_key"] = "usa.news" -session.message_transfer(destination="amq.topic", content=message) - -# usa.weather - - -for i in range(5): - message = Content("message " + str(i)) - message["routing_key"] = "usa.weather" - session.message_transfer(destination="amq.topic", content=message) - -message = Content(final) -message["routing_key"] = "usa.weather" -session.message_transfer(destination="amq.topic", content=message) - -# europe.news - -for i in range(5): - message = Content("message " + str(i)) - message["routing_key"] = "europe.news" - session.message_transfer(destination="amq.topic", content=message) - -message = Content(final) -message["routing_key"] = "europe.news" -session.message_transfer(destination="amq.topic", content=message) - - -# europe.weather - -for i in range(5): - message = Content("message " + str(i)) - message["routing_key"] = "europe.weather" - session.message_transfer(destination="amq.topic", content=message) - -message = Content(final) -message["routing_key"] = "europe.weather" -session.message_transfer(destination="amq.topic", content=message) - - -#----- Cleanup -------------------------------------------- - -# Clean up before exiting so there are no open threads. - -session.session_close() diff --git a/python/examples/pubsub/topic_publisher.py b/python/examples/pubsub/topic_publisher.py new file mode 100644 index 0000000000..1ff983b315 --- /dev/null +++ b/python/examples/pubsub/topic_publisher.py @@ -0,0 +1,80 @@ +#!/usr/bin/env python +""" + topic_publisher.py + + This is a simple AMQP publisher application that uses a + Topic exchange. The publisher specifies the routing key + and the exchange for each message. +""" + +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. + +spec = qpid.spec.load(amqp_spec) +client = Client(host, port, spec) +client.start({"LOGIN": user, "PASSWORD": password}) + +session = client.session() +session.session_open() + +#----- Publish some messages ------------------------------ + +# Create some messages and put them on the broker. Use the +# topic exchange. The routing keys are "usa.news", "usa.weather", +# "europe.news", and "europe.weather". + + +# usa.news + +for i in range(5): + message = Content("message " + str(i)) + message["routing_key"] = "usa.news" + session.message_transfer(destination="amq.topic", content=message) + +# usa.weather + +for i in range(5): + message = Content("message " + str(i)) + message["routing_key"] = "usa.weather" + session.message_transfer(destination="amq.topic", content=message) + +# europe.news + +for i in range(5): + message = Content("message " + str(i)) + message["routing_key"] = "europe.news" + session.message_transfer(destination="amq.topic", content=message) + +# europe.weather + +for i in range(5): + message = Content("message " + str(i)) + message["routing_key"] = "europe.weather" + session.message_transfer(destination="amq.topic", content=message) + +# Signal termination + +message = Content("That's all, folks!") +message["routing_key"] = "control" +session.message_transfer(destination="amq.topic", content=message) + + +#----- Cleanup -------------------------------------------- + +# Clean up before exiting so there are no open threads. + +session.session_close() diff --git a/python/examples/pubsub/topic_subscriber.py b/python/examples/pubsub/topic_subscriber.py new file mode 100644 index 0000000000..08682f0674 --- /dev/null +++ b/python/examples/pubsub/topic_subscriber.py @@ -0,0 +1,124 @@ +#!/usr/bin/env python +""" + topic_subscriber.py + + This subscriber creates private queues and binds them + to the topics "usa.#", "europe.#", "#.news", and "#.weather". +""" + +import base64 + +import qpid +from qpid.client import Client +from qpid.content import Content +from qpid.queue import Empty + +#----- Functions ------------------------------------------- + +def dump_queue(client, queue_name): + + print "Messages queue: " + queue_name + + consumer_tag = queue_name # Use the queue name as the consumer tag - need a unique tag + queue = client.queue(consumer_tag) + + # Call basic_consume() 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 basic_consume() 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) + + content = "" # Content of the last message read + final = "That's all, folks!" # In a message body, signals the last message + message = 0 + + while content != final: + try: + message = queue.get() + content = message.content.body + print content + except Empty: + if message != 0: + message.complete(cumulative=True) + print "No more messages!" + return + + + # Messages are not removed from the queue until they + # are acknowledged. Using multiple=True, all messages + # in the channel 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="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. + +spec = qpid.spec.load(amqp_spec) +client = Client(host, port, spec) +client.start({"LOGIN": user, "PASSWORD": password}) + +session = client.session() +session_info = session.session_open() +session_id = session_info.session_id + +#----- Main Body -- ---------------------------------------- + + +news = "news" + base64.urlsafe_b64encode(session_id) +weather = "weather" + base64.urlsafe_b64encode(session_id) +usa = "usa" + base64.urlsafe_b64encode(session_id) +europe = "europe" + base64.urlsafe_b64encode(session_id) + +session.queue_declare(queue=news, exclusive=True) +session.queue_declare(queue=weather, exclusive=True) +session.queue_declare(queue=usa, exclusive=True) +session.queue_declare(queue=europe, exclusive=True) + +# Routing keys may be "usa.news", "usa.weather", "europe.news", or "europe.weather". + +# The '#' symbol matches one component of a multipart name, e.g. "#.news" matches +# "europe.news" or "usa.news". + +session.queue_bind(exchange="amq.topic", queue=news, routing_key="#.news") +session.queue_bind(exchange="amq.topic", queue=weather, routing_key="#.weather") +session.queue_bind(exchange="amq.topic", queue=usa, routing_key="usa.#") +session.queue_bind(exchange="amq.topic", queue=europe, routing_key="europe.#") + +# Bind each queue to the control queue so we know when to stop + +session.queue_bind(exchange="amq.topic", queue=news, routing_key="control") +session.queue_bind(exchange="amq.topic", queue=weather, routing_key="control") +session.queue_bind(exchange="amq.topic", queue=usa, routing_key="control") +session.queue_bind(exchange="amq.topic", queue=europe, routing_key="control") + +# Remind the user to start the topic producer + +print "Queues create - please start the topic producer" + +# Call dump_queue to print messages from each queue + +dump_queue(client, news) +dump_queue(client, weather) +dump_queue(client, usa) +dump_queue(client, europe) + +#----- Cleanup ------------------------------------------------ + +# Clean up before exiting so there are no open threads. + +session.session_close() -- cgit v1.2.1