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laravel-trigger

Subscribe to MySQL events like jQuery, based on php-mysql-replication

中文说明

Quick Start

1. Install the package: composer require "huangdijia/laravel-trigger:^4.0"
2. Configure your MySQL server for replication (see MySQL Server Configuration)
3. Publish the config: php artisan vendor:publish --provider="Huangdijia\Trigger\TriggerServiceProvider"
4. Configure your .env file with database credentials
5. Start listening: php artisan trigger:start

Table of Contents

• Quick Start
• MySQL Server Configuration
• Installation
• Usage
• Event Subscribers
• Event Routes
• Management Commands
• Thanks to

MySQL Server Configuration

Replication Settings

In your MySQL server configuration file, you need to enable replication:

[mysqld]
server-id        = 1
log_bin          = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size  = 100M
binlog_row_image = full
binlog-format    = row #Very important if you want to receive write, update and delete row events

For more information: MySQL replication events explained

User Privileges

Grant the necessary privileges to your MySQL user:

GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'user'@'host';

GRANT SELECT ON `dbName`.* TO 'user'@'host';

Installation

Laravel

Install via Composer:

composer require "huangdijia/laravel-trigger:^4.0"

Publish the configuration file:

php artisan vendor:publish --provider="Huangdijia\Trigger\TriggerServiceProvider"

Lumen

Install via Composer:

composer require "huangdijia/laravel-trigger:^4.0"

Edit bootstrap/app.php and add:

$app->register(Huangdijia\Trigger\TriggerServiceProvider::class);
...
$app->configure('trigger');

Publish configuration and routes:

php artisan trigger:install [--force]

Configure

Edit your .env file and add the following configuration:

TRIGGER_HOST=192.168.xxx.xxx
TRIGGER_PORT=3306
TRIGGER_USER=username
TRIGGER_PASSWORD=password
...

Connection Timeouts (Recommended)

If your MySQL server (or a proxy in front of it) disconnects idle clients (low wait_timeout / interactive_timeout), the trigger process may crash with errors like:

SQLSTATE[HY000] ... 4031 The client was disconnected by the server because of inactivity.

To improve stability, enable a keepalive ping and/or set session variables for the trigger's MySQL metadata connection:

# Ping MySQL periodically (seconds). Set to 0 to disable.
TRIGGER_KEEPALIVE=60

# Session variables applied on connect (comma-separated key=value pairs).
TRIGGER_SESSION_VARIABLES=wait_timeout=7200,interactive_timeout=7200,net_read_timeout=3600,net_write_timeout=3600

Usage

Start the trigger service to begin listening for MySQL events:

php artisan trigger:start [-R=xxx]

The service will monitor your MySQL binary log and trigger registered event handlers when database changes occur.

Event Subscribers

Create a custom event subscriber by extending the EventSubscriber class:

For more subscriber usage examples, see: EventSubscribers

Event Routes

Basic Usage

$trigger->on('database.table', 'write', function($event) { /* do something */ });

Multi-tables and Multi-events

$trigger->on('database.table1,database.table2', 'write,update', function($event) { /* do something */ });

Multi-events

$trigger->on('database.table1,database.table2', [
    'write'  => function($event) { /* do something */ },
    'update' => function($event) { /* do something */ },
]);

Action as Controller

$trigger->on('database.table', 'write', 'App\\Http\\Controllers\\ExampleController'); // calls default method 'handle'
$trigger->on('database.table', 'write', 'App\\Http\\Controllers\\ExampleController@write');

Action as Callable

class Foo
{
    public static function bar($event)
    {
        dump($event);
    }
}

$trigger->on('database.table', 'write', 'Foo@bar');
$trigger->on('database.table', 'write', ['Foo', 'bar']);

Action as Job

Define your job class:

namespace App\Jobs;

class ExampleJob extends Job
{
    private $event;

    public function __construct($event)
    {
        $this->event = $event;
    }

    public function handle()
    {
        dump($this->event);
    }
}

Register the job route:

$trigger->on('database.table', 'write', 'App\Jobs\ExampleJob'); // calls default method 'dispatch'
$trigger->on('database.table', 'write', 'App\Jobs\ExampleJob@dispatch_now');

Management Commands

List Events

View all registered event listeners:

php artisan trigger:list [-R=xxx]

Terminate Service

Stop the trigger service gracefully:

php artisan trigger:terminate [-R=xxx]

Thanks to

JetBrains