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Inter-Process/Task Communication With Message Queues
- 1. Inter-Process/Task Communication With Message Queues William McVey < [email_address] > PyOhio July 26, 2009
- 4. Architecture
- 6. Lesson learned Do not screw with Apache's process model.
- 13. AMQP
- 14. AMQP Message Routing Image from: Messaging Tutorial - AMQP Programming Tutorial for C++, Java, Python, and C# Copyright © 2008 Red Hat, Inc. Under the Open Publication License
- 17. amqplib / carrot py-amqplib is a client library around the AMQP protocol.Fairly low level for my needs though, so a little digging found carrot
- 18. carrot sample >>> from carrot.messaging import Publisher, Consumer >>> class PostOfficePublisher (Publisher): ... exchange = "sorting_room" ... routing_key = "jason" >>> class PostOfficeConsumer (Consumer): ... queue = "po_box" ... exchange = "sorting_room" ... routing_key = "jason" ... ... def receive ( self , message_data, message): ... """Called when we receive a message.""" ... print ( "Received: %s " % message_data)
- 19. carrot sample >>> from ConfigParser import ConfigParser >>> config = ConfigParser() >>> config . read( "application.ini" ) >>> from carrot.connection import AMQPConnection >>> amqpconn = AMQPConnection( ... hostname = config . get( "broker" , "host" ), ... port = config . get( "broker" , "port" ), ... userid = config . get( "broker" , "userid" ), ... password = config . get( "broker" , "password" ), ... vhost = config . get( "broker" , "vhost" )) >>> PostOfficePublisher(connection = amqpconn) . send( ... { "My message" : [ "foo" , "bar" , "baz" ]}) >>> PostOfficeConsumer(connection = amqpconn) . next() Received: { "My message" : [ "foo" , "bar" , "baz" ]}