bunny/bunny

Performant pure-PHP AMQP (RabbitMQ) sync/async (ReactPHP) library

v0.4.1 2018-08-15 13:25 UTC

README

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Performant pure-PHP AMQP (RabbitMQ) sync/async (ReactPHP) library

Requirements

BunnyPHP requires PHP 7.0 and newer.

Installation

Add as Composer dependency:

$ composer require bunny/bunny:@dev

Comparison

You might ask if there isn't a library/extension to connect to AMQP broker (e.g. RabbitMQ) already. Yes, there are multiple options:

Why should you want to choose BunnyPHP instead?

  • You want nice idiomatic PHP API to work with (I'm looking at you, php-amqplib). BunnyPHP interface follows PHP's common coding standards and naming conventions. See tutorial.

  • You can't (don't want to) install PECL extension that has latest stable version in 2014. BunnyPHP isn't as such marked as stable yet. But it is already being used in production.

  • You have both classic CLI/FPM and ReactPHP applications and need to connect to RabbitMQ. BunnyPHP comes with both synchronous and asynchronous clients with same PHP-idiomatic interface. Async client uses react/promise.

Apart from that BunnyPHP is more performant than main competing library, php-amqplib. See benchmark/ directory and php-amqplib's benchmark/.

Benchmarks were run as:

$ php benchmark/producer.php N & php benchmark/consumer.php
Library N (# messages) Produce sec Produce msg/sec Consume sec Consume msg/sec
php-amqplib 100 0.0131 7633 0.0446 2242
bunnyphp 100 0.0128 7812 0.0488 2049
bunnyphp +/- +2.3% -8.6%
php-amqplib 1000 0.1218 8210 0.4801 2082
bunnyphp 1000 0.1042 9596 0.2919 3425
bunnyphp +/- +17% +64%
php-amqplib 10000 1.1075 9029 5.1824 1929
bunnyphp 10000 0.9078 11015 2.9058 3441
bunnyphp +/- +22% +78%
php-amqplib 100000 20.7005 4830 69.0360 1448
bunnyphp 100000 9.7891 10215 35.7305 2789
bunnyphp +/- +111% +92%

Tutorial

Connecting

When instantiating the BunnyPHP Client accepts an array with connection options:

$connection = [
    'host'      => 'HOSTNAME',
    'vhost'     => 'VHOST',    // The default vhost is /
    'user'      => 'USERNAME', // The default user is guest
    'password'  => 'PASSWORD', // The default password is guest
];

$bunny = new Client($connection);
$bunny->connect();

Publish a message

Now that we have a connection with the server we need to create a channel and declare a queue to communicate over before we can publish a message, or subscribe to a queue for that matter.

$channel = $bunny->channel();
$channel->queueDeclare('queue_name'); // Queue name

With a communication channel set up, we can now publish a message to the queue:

$channel->publish(
    $message,    // The message you're publishing as a string
    [],          // Any headers you want to add to the message
    '',          // Exchange name
    'queue_name' // Routing key, in this example the queue's name
);

Subscribing to a queue

Subscribing to a queue can be done in two ways. The first way will run indefinitely:

$channel->run(
    function (Message $message, Channel $channel, Client $bunny) {
        $success = handleMessage($message); // Handle your message here

        if ($success) {
            $channel->ack($message); // Acknowledge message
            return;
        }

        $channel->nack($message); // Mark message fail, message will be redelivered
    },
    'queue_name'
);

The other way lets you run the client for a specific amount of time consuming the queue before it stops:

$channel->consume(
    function (Message $message, Channel $channel, Client $client){
        $channel->ack($message); // Acknowledge message
    },
    'queue_name'
);
$bunny->run(12); // Client runs for 12 seconds and then stops

Pop a single message from a queue

$message = $channel->get('queue_name');

// Handle message

$channel->ack($message); // Acknowledge message

Prefetch count

A way to control how many messages are prefetched by BunnyPHP when consuming a queue is by using the channel's QOS method. In the example below only 5 messages will be prefetched. Combined with acknowledging messages this turns into an effective flow control for your applications, especially asynchronous applications. No new messages will be fetched unless one has been acknowledged.

$channel->qos(
    0, // Prefetch size
    5  // Prefetch count
);

Asynchronous usage

Bunny supports both synchronous and asynchronous usage utilizing ReactPHP. The following example shows setting up a client and consuming a queue indefinitely.

(new Async\Client($eventLoop, $options))->connect()->then(function (Client $client) {
   return $client->channel();
})->then(function (Channel $channel) {
   return $channel->qos(0, 5)->then(function () use ($channel) {
       return $channel;
   });
})->then(function (Channel $channel) use ($event) {
   $channel->consume(
       function (Message $message, Channel $channel, Client $client) use ($event) {
           // Handle message

           $channel->ack($message);
       },
       'queue_name'
   );
});

AMQP interop

There is amqp interop compatible wrapper(s) for the bunny library.

Contributing

  • Large part of the PHP code (almost everything in Bunny\Protocol namespace) is generated from spec in file spec/amqp-rabbitmq-0.9.1.json. Look for DO NOT EDIT! in doc comments.

    To change generated files change spec/generate.php and run:

    $ php ./spec/generate.php

Broker compatibility

Works well with RabbitMQ

Does not work with ActiveMQ because it requires AMQP 1.0 which is a completely different protocol (Bunny is implementing AMQP 0.9.1)

License

BunnyPHP is licensed under MIT license. See LICENSE file.