Laravel 5.1中定义事件、事件监听器以及触发事件例子

protected $listen = [
    'App\Events\PostSaved'=>[
        'App\Listeners\SaveDataToCache'
    ]
];

namespace App\Events;

use App\Events\Event;
use App\Models\Post;
use Illuminate\Queue\SerializesModels;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;

class PostSaved extends Event
{
    use SerializesModels;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct(Post $post)
    {
        $this->post = $post;
    }

    /**
     * Get the channels the event should be broadcast on.
     *
     * @return array
     */
    public function broadcastOn()
    {
        return [];
    }
}

namespace App\Listeners;

use App\Events\PostSaved;
use Cache;
use Log;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;

class SaveDataToCache
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param PostSaved $event
     * @return void
     */
    public function handle(PostSaved $event)
    {
        $post = $event->post;
        $key = 'post_'.$post->id;
        Cache::put($key,$post,60*24*7);
        Log::info('保存文章到缓存成功！',['id'=>$post->id,'title'=>$post->title]);
    }
}

public function store(Request $request)
{
    $title = $request->input('title');
    $content = $request->input('content');

    $post = new Post;
    $post->title = $title;
    $post->content = $content;
    $post->save();

    Event::fire(new PostSaved($post));

    return redirect()->route('post.show',['post'=>$post]);
}

public function update(Request $request, $id)
{
    $post = Post::find($id);
    if(!$post)
        exit('指定文章不存在！');

    $title = $request->input('title');
    $content = $request->input('content');

    $post->title = $title;
    $post->content = $content;
    $post->save();

    Event::fire(new PostSaved($post));

    return redirect()->route('post.show',['post'=>$post]);
}