事件注册

swoft提供了简便的事件使用

注解

Listener

事件监听器类注解tag @Listener

• 注解类： Swoft\Event\Annotation\Mapping\Listener
• 作用范围： CLASS
• 拥有属性：
  • event string 要监听的事件名称
  • priority int 此监听器的优先级，值越大越先被调用

注意你的类必须实现接口: Swoft\Event\EventHandlerInterface

Subscriber

事件监听器类注解tag @Subscriber，与 @Listener 不同的是，允许在同一个类里处理多个事件。

• 注解类： Swoft\Event\Annotation\Mapping\Subscriber
• 作用范围： CLASS

注意你的类必须实现接口: Swoft\Event\EventSubscriberInterface

示例

Listener示例

<?php declare(strict_types=1);
namespace SwoftTest\Event\Testing;
use Swoft\Event\Annotation\Mapping\Listener;
use Swoft\Event\EventHandlerInterface;
use Swoft\Event\EventInterface;
/**
 * Class TestHandler
 * @Listener("test.evt")
 */
class TestHandler implements EventHandlerInterface
{
    /**
     * @param EventInterface $event
     */
    public function handle(EventInterface $event): void
    {
        $pos = __METHOD__;
        echo "handle the event '{$event->getName()}' on the: $pos\n";
    }
}

Subscriber示例

<?php declare(strict_types=1);
namespace SwoftTest\Event\Testing;
use Swoft\Event\Annotation\Mapping\Subscriber;
use Swoft\Event\EventInterface;
use Swoft\Event\EventSubscriberInterface;
use Swoft\Event\Listener\ListenerPriority;
/**
 * Class TestSubscriber
 * @Subscriber()
 */
class TestSubscriber implements EventSubscriberInterface
{
    public const EVENT_ONE = 'test.event1';
    public const EVENT_TWO = 'test.event2';
    /**
     * Configure events and corresponding processing methods (you can configure the priority)
     * @return array
     * [
     *  'event name' => 'handler method'
     *  'event name' => ['handler method', priority]
     * ]
     */
    public static function getSubscribedEvents(): array
    {
        return [
            self::EVENT_ONE => 'handleEvent1',
            self::EVENT_TWO => ['handleEvent2', ListenerPriority::HIGH],
        ];
    }
    public function handleEvent1(EventInterface $evt): void
    {
        $evt->setParams(['msg' => 'handle the event: test.event1 position: TestSubscriber.handleEvent1()']);
    }
    public function handleEvent2(EventInterface $evt): void
    {
        $evt->setParams(['msg' => 'handle the event: test.event2 position: TestSubscriber.handleEvent2()']);
    }
}

触发事件

事件名称管理推荐放置在一个单独类的常量里面，方便管理和维护

\Swoft::trigger('event name', null, $arg0, $arg1);