README

This package provides a Kafka-based queue driver for Laravel, allowing you to use Apache Kafka as a message queue for your Laravel applications. It integrates seamlessly with Laravel's queue system, enabling you to push jobs to Kafka and process them using Kafka consumers.

Features

• Kafka Queue Driver: Use Kafka as a queue driver in Laravel.
• Producer and Consumer Support: Easily produce and consume messages from Kafka topics.
• Configuration: Customize Kafka connection settings via Laravel's configuration files.
• Service Provider: Automatically registers Kafka connectors and dependencies.
• Job Handling: Process jobs using Laravel's job handling system.

Installation

You can install the package via Composer:

composer require smartcoder01/laravel-kafka-queue

Configuration

1. Publish Configuration File

Publish the configuration file to your Laravel application:

php artisan vendor:publish --provider="Smartcoder01\Queue\Kafka\KafkaQueueServiceProvider"

This will create a kafka.php file in your config directory.

2. Update .env

Add the following Kafka configuration to your .env file:

QUEUE_CONNECTION=kafka

KAFKA_BROKER_LIST=localhost:9092
KAFKA_GROUP_ID=laravel-queue-group
KAFKA_AUTO_OFFSET_RESET=earliest
KAFKA_QUEUE=default

3. Configure Kafka Connection

Update the config/kafka.php file to match your Kafka setup:

return [
    'connections' => [
        'kafka' => [
            'broker_list' => env('KAFKA_BROKER_LIST', 'localhost:9092'),
            'group_id' => env('KAFKA_GROUP_ID', 'laravel-queue-group'),
            'auto_offset_reset' => env('KAFKA_AUTO_OFFSET_RESET', 'earliest'),
            'queue' => env('KAFKA_QUEUE', 'default'),
            'default_configuration' => [
                'enable.auto.commit' => 'true',
                // Add other Kafka configuration options here
            ],
        ],
    ],
];

Usage

1. Setting Up Queues

To use Kafka as your queue driver, update the QUEUE_CONNECTION variable in your .env file:

QUEUE_CONNECTION=kafka

2. Pushing Jobs to Kafka

You can push jobs to Kafka just like you would with any other Laravel queue driver:

dispatch(new \App\Jobs\ProcessOrder($order));

Alternatively, you can use the Queue facade:

use Illuminate\Support\Facades\Queue;

Queue::push(new \App\Jobs\ProcessOrder($order));

3. Consuming Jobs

To process jobs from Kafka, run the Laravel queue worker:

php artisan queue:work

This will start a worker that listens to the Kafka topic specified in your configuration.

Advanced Configuration

Customizing Kafka Producer and Consumer

You can customize the Kafka producer and consumer by modifying the registerDependencies method in the KafkaQueueServiceProvider:

$this->app->bind('queue.kafka.producer', function ($app, $parameters) {
    $conf = new \RdKafka\Conf();
    $conf->set('metadata.broker.list', env('KAFKA_BROKER_LIST', 'localhost:9092'));
    return new \RdKafka\Producer($conf);
});

$this->app->bind('queue.kafka.consumer', function ($app, $parameters) {
    $conf = new \RdKafka\Conf();
    $conf->set('metadata.broker.list', env('KAFKA_BROKER_LIST', 'localhost:9092'));
    $conf->set('group.id', env('KAFKA_GROUP_ID', 'laravel-queue-group'));
    $conf->set('auto.offset.reset', env('KAFKA_AUTO_OFFSET_RESET', 'earliest'));
    return new \RdKafka\KafkaConsumer($conf);
});

Handling Deadlocks

The package includes basic deadlock handling for job processing. If a deadlock is detected, the worker will retry the job after a short delay.

Troubleshooting

1. Kafka Broker Not Reachable

Ensure that your Kafka broker is running and accessible. Check the KAFKA_BROKER_LIST configuration in your .env file.

2. Consumer Not Receiving Messages

• Verify that the group.id and auto.offset.reset settings are correct.
• Ensure that the Kafka topic exists and that the consumer is subscribed to the correct topic.

3. Producer Timeout

If the producer times out while waiting for acknowledgment, increase the timeout in the waitForAck method:

protected function waitForAck()
{
    $timeout = 30 * 1000; // Increase timeout to 30 seconds
    // ...
}

Contributing

Contributions are welcome! Please open an issue or submit a pull request if you have any improvements or bug fixes.

License

This package is open-source software licensed under the MIT License.

Credits

• SmartCoder01
• Laravel
• php-rdkafka

Enjoy using Kafka with Laravel! 🚀