关于Laravel5中的Container, Command Bus, Event

        $this->app->bind('App\DAO\UserDAO',function(){
        return new UserDAOImpl();
        });
        
        $this->app->bind('App\DAO\UserDAO','App\DAO\Impl\UserDAOImpl');

$this->app->bind(['dao.user' => 'App\DAO\UserDAO'],'App\DAO\Impl\UserDAOImpl');

$this->app->bind(['dao.user' => 'App\DAO\UserDAO'],'App\DAO\Impl\UserDAOImpl', true);

 php artisan make:command FirstCommand

 $this->dispatch(new FirstCommand());

    protected $listen = [
        'App\Events\FirstEvent' => [
            'App\Handlers\Events\FirstEventHandler',
        ],
    ];

 <span style="white-space:pre">	</span>\Event::fire(new FirstEvent()); 
        //or use the helper function
        event(new FirstEvent());

    $this->release(30);
    $this->delete(); 

    class ThirdEventHandler {
    
        /**
         * Create the event handler.
         *
         * @return void
         */
        public function __construct()
        {
            //
        }
    
        public function doSomething(){
            echo " ThirdEventHalder !!!..";
        }
    
        public function doSomethingToo(){
            echo "lalala, ThirdEventHalder again!!!..";
        }
    
        /**
         * 注册监听器给订阅者。
         *
         * @param  Illuminate\Events\Dispatcher  $events
         * @return array
         */
        public function subscribe($events)
        {
            $events->listen('App\Events\FirstEvent', 'App\Handlers\Events\ThirdEventHandler@doSomething');
    
            $events->listen('App\Events\FirstEvent', 'App\Handlers\Events\ThirdEventHandler@doSomethingToo');
        }
    
    }

    $subscriber = new App\Handlers\Events\ThirdEventHandler();
    Event::subscribe($subscriber);
    // or rely on IoC
    Event::subscribe('App\Handlers\Events\ThirdEventHandler');