README

LaravelKafka is a simple yet powerful library for producing messages to Apache Kafka from your Laravel applications. It builds upon php-rdkafka and adheres to Laravel conventions, including Service Providers, Facades, Queueable Jobs, Artisan commands, dependency injection, and configuration.

🔧 Maintained by OpenNebel

🧩 Features

• ✅ Synchronous Kafka message sending
• 🔁 Asynchronous support via Laravel's queue system
• 🧱 Modular structure (producers, config, jobs, DLQ)
• 🧠 Support for headers, keys, partitions, msgflags
• 🛠 Error handling (Dead Letter Queue with full Kafka options)
• 🧪 Integrated Artisan commands (status, retry-failed)
• 📦 Compatible with Laravel Horizon, Telescope, Docker, CI/CD

🚀 Installation

1. Install the PHP Kafka extension

pecl install rdkafka

📌 Ensure php.ini loads the extension: extension=rdkafka

2. Install the library

composer require opennebel/laravel-kafka

⚙️ Configuration

Method 1 – Full Publication (config + migration)

php artisan vendor:publish --tag=laravel-kafka

Method 2 – Separate Publication

# Only the config
php artisan vendor:publish --tag=laravel-kafka-config

# Only the DLQ migration
php artisan vendor:publish --tag=laravel-kafka-migrations

.env File

KAFKA_BROKERS=localhost:9092
KAFKA_DEFAULT_TOPIC=notification-events

# For asynchronous sending via Laravel Queue
KAFKA_ASYNC_ENABLED=true
KAFKA_ASYNC_QUEUE=default

✉️ Sending Messages

🔹 Synchronous Sending

use OpenNebel\LaravelKafka\Facades\Kafka;

// Raw message with options
Kafka::produce('notification-events', 'Hello Kafka', [
    'key' => 'user:123',
    'headers' => ['x-app' => 'mondialgp'],
    'partition' => 0,
    'flag' => 0
]);

// JSON message
Kafka::produceJson('notification-events', [
    'type' => 'email',
    'to' => 'user@example.com',
    'subject' => 'Welcome',
    'variables' => ['name' => 'John']
]);

🔸 Asynchronous Sending (Laravel Queue)

Kafka::produceAsync('notification-events', [
    'type' => 'sms',
    'to' => '+33600000000',
    'message' => 'Your code is 1234'
], [
    'key' => 'job:456',
    'headers' => ['x-job' => 'welcome']
]);

Kafka::produceAsyncToDefault([
    'type' => 'sms',
    'to' => '+33600000000',
    'message' => 'Your code is 1234'
], [
    'key' => 'default-key'
]);

Start the worker to process jobs:

php artisan queue:work

🧩 Usage with Dependency Injection

use OpenNebel\LaravelKafka\KafkaService;

public function handle(KafkaService $kafka)
{
    $kafka->produceToDefault('message via DI', [
        'headers' => ['x-di' => 'used']
    ]);
}

💥 Error Handling (DLQ)

If flush() fails or the broker is unreachable, the message is:

• recorded in the kafka_failed_messages table
• all Kafka options are stored as JSON
• accessible via Artisan command
• manually re-attemptable

Migration:

php artisan migrate

Retry Failed Messages:

php artisan kafka:retry-failed

🛠 Artisan Commands

These commands are auto-registered via KafkaServiceProvider.

🧰 Service API

📂 Configuration (config/kafka.php)

return [
    'brokers' => env('KAFKA_BROKERS', 'localhost:9092'),
    'default_topic' => env('KAFKA_DEFAULT_TOPIC', 'notification-events'),

    'async' => [
        'enabled' => env('KAFKA_ASYNC_ENABLED', true),
        'queue' => env('KAFKA_ASYNC_QUEUE', 'default'),
    ],

    'options' => [
        // Kafka global options (passed to php-rdkafka Producer config)
        // e.g. 'compression.codec' => 'snappy'
    ],
];

✅ Prerequisites

• PHP >= 8.0
• Laravel >= 9.x
• ext-rdkafka PHP extension
• Kafka broker (local, Docker, or cloud)

🧠 Recommendations

• Use Laravel Horizon to manage async jobs
• Monitor failures with Telescope or Sentry
• Track Kafka logs via storage/logs/laravel.log

📄 License

MIT © OpenNebel