5.1 事件Event
Minor的 Event 类提供一个简单的观察者实现，允许您在应用程序里订阅与监听事件。
5.1.1 订阅事件
首先创建一个事件类：
<?<span>php
namespace App\Event;
</span><span>use</span><span> Minor\Event\Event;
</span><span>class</span> DemoEvent <span>extends</span><span> Event
{
</span><span>private</span> <span>$name</span><span>;
</span><span>public</span> <span>function</span> __construct(<span>$name</span><span>)
{
</span><span>$this</span>->name = <span>$name</span><span>;
}
</span><span>public</span> <span>function</span> setName(<span>$name</span><span>)
{
</span><span>$this</span>->name = <span>$name</span><span>;
}
</span><span>public</span> <span>function</span><span> getName()
{
</span><span>return</span> <span>$this</span>-><span>name;
}
}</span>然后在配置文件中注册这个事件：
<?<span>php
</span><span>return</span> <span>$events</span> =<span> [
</span>'App\Event\DemoEvent' =><span> [
</span>'App\Listener\DemoListener' => 'handle',<span>
]</span>,<span>
];</span>5.1.2 触发事件
Minor提供了一个事件管理类:Minor\Event\EventManger,通过调用该类的静态方法fire：EventManager::fire($event)就可以触发这个事件,例：
<span>class</span> FooController <span>extends</span><span> Controller
{
</span><span>public</span> <span>function</span> bar(<span>$productName</span><span>)
{
</span><span>$event</span> = <span>new</span> DemoEvent('DemoEvent'<span>);
EventManager</span>::fire(<span>$event</span><span>);
</span>...<span>
}
}</span>
5.2 监听器
当触发事件后事件管理器EventManager就会通过配置文件去触发监听器的制定方法。在5.1.1配置文件中我们配置了DemoEvent的监听器为App\Listener\DemoListener的handle方法，可以看一下这个类的实现：
<?<span>php
namespace App\Listener;
</span><span>use</span><span> App\Event\DemoEvent;
</span><span>use</span><span> Minor\Event\Listener;
</span><span>class</span> DemoListener <span>extends</span><span> Listener
{
</span><span>public</span> <span>function</span> handle(DemoEvent <span>$event</span><span>)
{
</span><span>echo</span> '[DemoListener] handle the event:[' . <span>$event</span>->getName() .'] success!<br/><br/>'<span>;
}
}</span>
