如何在 Symfony 2 中更改事件处理程序的优先级 [英] How to change event handler priority in Symfony 2

问题描述

我已经为name: kernel.event_listener, event: kernel.request"定义了2个事件监听器，但是我可以做我想做的事，我不能改变调用这个监听器的顺序.我尝试使用优先级"编号，但没有任何帮助.

I have defined 2 event listeners for "name: kernel.event_listener, event: kernel.request", but I can do what I want, I can't change the order of calling this listener. I try to use the "priority" number, but nothing helps.

这个事件总是调用@first:

This event is always calling @first:

  MyBundle.Foo.Listener.RequestListener:
    class: %MyBundle.Foo.Listener.request.class%
    arguments: [ @session, @liip_theme.active_theme, @Need.some.infos.service ]
    tags:
      - { name: kernel.event_listener, event: kernel.request, method: onRequest, priority: 100 }

而且这个事件永远不会调用，因为第一个事件使用的服务依赖于这个事件的信息，所以它在触发这个事件之前就崩溃了:

and this event is never calling, because the first event use a service that depends on a info of this event, so it crashes before this event is triggered:

  MyBundle.Bar.Listener.RequestListener:
    class: %MyBundle.Bar.Listener.request.class%
    arguments: [ @session ]
    tags:
      - { name: kernel.event_listener, event: kernel.request, method: onRequest, priority: 200 }

我也改变了优先级"，但没有任何改变:(

I have changed the "priority" too, but nothing changed :(

也许有人给我一个提示，我可以确保侦听器MyBundle.Bar.Listener.RequestListener"会在其他事件之前调用?

Maybe someone have a tip for me, that I can to ensure that listener "MyBundle.Bar.Listener.RequestListener" will call before the other event?

推荐答案

问题是事件监听器类将在 Symfony 启动时初始化，在任何事件触发之前.

The problem is that the event listener class will init at Symfony start, before any event triggers.

我不得不将我的 DI 更改为:

I had to change my DI to:

  MyBundle.Foo.Listener.RequestListener:
    class: %MyBundle.Foo.Listener.request.class%
    arguments: [ @session, @liip_theme.active_theme, @service_container ]
    tags:
      - { name: kernel.event_listener, event: kernel.request, method: onRequest, priority: 0 }

我使用了这个@service_container"服务，并在事件内部调用了目标服务@Need.some.infos.service"，一切正常.

I used this "@service_container" service, and call inside the event the target service "@Need.some.infos.service" and all works fine.

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