README

Installation

composer require weldon/laravel-rabbit

After installing the package, publish its assets using the rabbit:install Artisan command.

php artisan rabbit:install

Settings

• config/amqp.php - RabbitMQ settings
• config/rabbit_events.php - Write methods what they are responsible for the events dispatched from another microservice
• app/Providers/RabbitServicePRovider - Write queues what to be declared at runtime

Examples

1. Consuming messages

<?php

use App\Rabbitmq\Rabbit\Client;
use PhpAmqpLib\Message\AMQPMessage;
    
$client = app(Client::class);
$client->consume('queue-one', function (AMQPMessage $message) {
            /**
             * Acknowledge a message
             */
            $message->ack(true);
            
            /**
             * @var Client $this
             */
            $this->dispatchEvents($message);
        })->wait(); // or waitForever();

?>

2. Publishing message

<?php

use App\Rabbitmq\Rabbit\Client;
use PhpAmqpLib\Message\AMQPMessage;
    
$client = app(Client::class);
$client->setMessage([
            'method' => $method,
            'params' => $object->all()
])->publish('queue-one');

?>

3. Publishing and consuming a message at once

<?php

use App\Rabbitmq\Rabbit\Client;
use PhpAmqpLib\Message\AMQPMessage;
    
$client = app(Client::class);
$result = $client->setMessage([
            'method' => 'methodName',
            'params' => ['param1' => 'value1']
])->request()->getResult(); # you can pass a queue name inside a request method, otherwise it uses the default queue

?>

Development

You can register your events in config/rabbit_events.php like that

<?php

use App\Rabbitmq\Dto\Products\ProductServiceObject;
use App\Rabbitmq\Services\ProductService;

return [
    'createProduct' => [
        'class' => ProductService::class,
        'method' => 'createProduct',
        'dto' => ProductServiceObject::class
    ]
];

Now you need a new service and DTO (Data Transfer Object) classes.

To create a new service class with a function, use the following command:

php artisan make:rabbit-service ProductService createProduct

This will create a new service class named ProductService with a function named createProduct.

It also creates DTO class which will accepted in createProduct function.

The generated files will be located in the following directories:

• Service class: App/Services/ProductService.php
• Data Transfer Object (DTO): App/Services/Dto/ProductServiceObject.php

If you want to change namespace of service and DTO classes, you can replace them in config/amqp.php.

<?php
    .
    .
    .
    /**
     * Namespace of data service classes
     *
     * It will be merged to root namespace which is App/config('amqp.service_namespace')
     */
    'service_namespace' => 'Services',

    /**
     * Namespace of data transfer object
     *
     * It will be merged to root namespace which is App/config('amqp.service_namespace')/config('amqp.dto_namespace')
     */
    'dto_namespace' => 'Dto',
];

Additional

While application is accepting message, if exception is happened.

The message will be sent to dead-letter-queue which is config('amqp.dead_letter_queue').

The message may not pass from validation, in it the message will be sent to invalid-queue-letter which is config('amqp.invalid_letter_queue').

If you don't define invalid_letter_queue in your 'config/amqp.php' file. The message will be deleted.

Note that: The both options only work in publisher and subscriber mode.

<?php
    .
    .
    . 
    /**
     * When error is out in service class, that message will be sent to config('amqp.dead-letter-queue')
     *
     * This works only subscriber and publisher mode
     */
    'dead_letter_queue' => 'dead-letter-queue',

    /**
     * When message cannot pass validation, the message will be sent to this queue
     * If name of this queue is null, the message will be deleted
     *
     * This works only subscriber and publisher mode
     */
    'invalid_letter_queue' => null,
];

Queues

You need to configure your queues in config/amqp.php.

    ...
    'config' => [

        'default_queue' => 'default',

        'is_multi_queue' => false,

        'queues' => ['default', 'foo', 'bar'],
    ],