Laravel给生产环境添加监听事件代码分享

laravel版本：5.2.*

一、创建监听器

php artisan make:listener QueryListener --event=Illuminate\\Database\\Events\\QueryExecuted

or

sudo /usr/local/bin/php artisan make:listener QueryListener --event=Illuminate\\Database\\Events\\QueryExecuted

会自动生成文件 app/Listeners/QueryListener.php

二、注册事件

打开 app/Providers/EventServiceProvider.php，在 $listen 中添加 Illuminate\Database\Events\QueryExecuted 事件的监听器为 QueryListener

protected $listen = [ 
 'Illuminate\Database\Events\QueryExecuted' => [
  'App\Listeners\QueryListener',
 ],
];

最终代码如下

namespace App\Providers;
use Illuminate\Contracts\Events\Dispatcher as DispatcherContract;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
class EventServiceProvider extends ServiceProvider
{
 /**
  * The event listener mappings for the application.
  *
  * @var array
  */
 protected $listen = [
  'App\Events\SomeEvent' => [
   'App\Listeners\EventListener',
  ],
  'Illuminate\Database\Events\QueryExecuted' => [
   'App\Listeners\QueryListener',
  ],
 ];
 /**
  * Register any other events for your application.
  *
  * @param \Illuminate\Contracts\Events\Dispatcher $events
  * @return void
  */
 public function boot(DispatcherContract $events)
 {
  parent::boot($events);
  //
 }
}

三、添加逻辑

打开 app/Listeners/QueryListener.php

光有一个空的监听器是不够的，我们需要自己实现如何把 $sql 记录到日志中。为此，对 QueryListener 进行改造，完善其 handle 方法如下:

$sql = str_replace("?", "'%s'", $event->sql);
$log = vsprintf($sql, $event->bindings);
Log::info($log);

最终代码如下

namespace App\Listeners;
use Log;
use Illuminate\Database\Events\QueryExecuted;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
class QueryListener
{
 /**
  * Create the event listener.
  *
  * @return void
  */
 public function __construct()
 {
  //
 }
 /**
  * Handle the event.
  *
  * @param QueryExecuted $event
  * @return void
  */
 public function handle(QueryExecuted $event)
 {
  $sql = str_replace("?", "'%s'", $event->sql);
  $log = vsprintf($sql, $event->bindings);
  Log::info($log);
 }
}

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