是否可以在JBoss定时服务中使用Seam？ [英] Is it possible to use Seam in a JBoss timed service?

问题描述

我已经开始编写一些新的JBoss定时服务，该服务旨在使用一些现有的接缝组件。但由于不存在的上下文，我似乎无法访问这些组件。是否可以在JSF的典型情况下使用它们？

I've started to write some new JBoss timed service that was meant to use some existing seam components. But it seems that I can't access these components because of non-existing contexts. Is it possible to use them other than in the typical situation with JSF?

一个小片段来展示我想要做的事情......

A little snippet to demonstrate what I want to do...

@Service
public class MyService extends DefaultTimedService implements TimedObject, DefaultServiceInterface {
    @Timeout
    public void ejbTimeout(Timer timer) {
        MyInterface loader = (MyInterface) Component.getInstance(MyInterface.SEAM_NAME, true);
        // throws no context!
    }
}

例如：抛出以下异常：

java.lang.IllegalStateException: No application context active
    at org.jboss.seam.Component.forName(Component.java:1945)
    at org.jboss.seam.Component.getInstance(Component.java:2005)

推荐答案

有一种方法有点脏，有很多开发人员不会使用这样的黑客，但它会解决你的问题：

There is one way that is a little dirty and there are many developers that would not use such a hack ever but it will solve your problem:

import org.jboss.seam.contexts.Lifecycle;

@Service
public class MyService extends DefaultTimedService implements TimedObject, DefaultServiceInterface {
    @Timeout
    public void ejbTimeout(Timer timer) {
        Lifecycle.beginCall();

        MyInterface loader = (MyInterface) Component.getInstance(MyInterface.SEAM_NAME, true);
        // will not throw no context!
        // also the Component.getInstance(MyInterface.SEAM_NAME, true,true); call
        // is another way you could inject that component. 

        Lifecycle.endCall();
    }
}

我在一个项目中使用它，我无法'找到其他有用的东西。如果有人有另一个解决方案，我期待在这里看到它:)。

I have used it in one project where I couldn't find anything else that worked. If anybody has another solution I am looking forward to seeing it here :).

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