RabbitMQ in PHP

RabbitMQ in PHP
use message broker rabbitmq in php
Sergio Sicari <sergiosicari@gmail.com>

What is a RabbitMQ?
RabbitMQ is a messaging broker, a service
platform to send and receive messages
implementing the Advanced Message
Queueing Protocol (AMQP).

It's write in Erlang and open source.

It's official supported on a number of operating
system and language (through API)

Install the service
On Ubuntu from repository:

1) Add the following line to your /etc/apt/sources.list:
deb http://www.rabbitmq.com/debian/ testing main
2) $ apt-get update
3) $ sudo apt-get install rabbitmq-server

You managing the service with 'rabbitmqctl'
$ rabbitmqctl stop/start
$ rabbitmqctl status

Managment (rabbitmqadmin*)
The rabbitmq-management plugin provides an HTTP-based
API for management and monitoring of your RabbitMQ
server, along with a browser-based UI and a command line
tool.

You can install with follow command:
$ rabbitmq-plugins enable rabbitmq_management

Now you can manage RabbitMQ from web gui at:
http://localhost:55672 **

* rabbitmqadmin require Mochiweb web server
** username: guest password: guest

Use php 5.3*
Use php-amqplib, a php implementation of
amqp protocol from
https://github.com/videlalvaro/php-amqplib

$ git clone git://github.com/videlalvaro/php-amqplib.git

use composer to resolve depencies
$ curl --silent https://getcomposer.org/installer | php
$ php composer.phar install

* this version of lib require php 5.3 because it use namespaces feature for use it on php 5.2 checkout
from http://code.google.com/p/php-amqplib/ and use require_once instead of namespaces

Example:
I have a process that execute two operation:

1. Download and process some data (fast)
2. Download image from web (slow)

I don't want to wait for second operation,
because it's slow!

I delegate the second operation to RabbitMQ

Solve with RabbitMQ
Standard RabbitMQ
init init

download data download data
Queue
download images processing data

processing data end

end C
Consumer: consumes the queued data

"Processing data" step insert link in queue
It will be disposed of by the consumer regardless

Publisher

Connection + Channel for AMQP

Fast operation, run directly

Put (publish) in Queue
link for download image

Consumer

Connection + Channel for AMQP

Process function (download images)
this is a callback function used by
basic_consume method for queue consume
*

When the process is completed consumer
return an acknowledge to publisher
*

References

http://www.rabbitmq.com/ Official Site
https://github.com/videlalvaro/php-amqplib Php API (5.3)
http://code.google.com/p/php-amqplib/ Php API (5.2)

Sergio Sicari <sergiosicari@gmail.com>

RabbitMQ in PHP

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