Alternative扩展具体类

Alternative扩展具体类

本文介绍了如何在网络应用程序中使用@Alternative扩展具体类?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试禁用位于bean存档罐中的类的2个观察者方法(更具体地说,是Seam 3 Faces模块的类LoginListener),并改用我的地雷.

I'm trying to disable 2 observer methods of a class which is in a beans archive jar (more specifically, the class LoginListener of Seam 3 Faces module), and use mines instead.

我有一个Web项目,其中有一个bean存档:

I have a web project, with a beans archive in it :

app.war
\- WEB-INF
  \- lib
    \- seam-faces-3.1.0.Final.jar
    |- my-beans.jar

my-beans.jar中,我有那个课:

@Alternative
public class MyLoginListener extends LoginListener {
    @Override
    public void observePostLoginEvent(final PostLoginEvent event) {
    }

    @Override
    public void observePreLoginEvent(final PreLoginEvent event) {
    }
}

然后,在my-beans.jar/META-INF/beans.xml中,我将其激活:

Then, in my-beans.jar/META-INF/beans.xml I activate it :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/beans_1_0.xsd">
    <alternatives>
        <class>com.mycompagny.MyLoginListener</class>
    </alternatives>
</beans>

而且,app.war/WEB-INF/beans.xml中的内容相同.

这里我不明白为什么,但是仍然是原始的LoginListener observePostLoginEvent(@Observes PostLoginEvent event)observePreLoginEvent被称为...有人知道为什么吗?

Here I don't understand why, but it's still the original LoginListener observePostLoginEvent(@Observes PostLoginEvent event) and observePreLoginEvent which are called... does somebody know why ?

推荐答案

您是否也尝试使用@Specializes(@Alternative @Specializes)注释您的课程?根据焊接参考这样您可以完全隐藏"另一个bean(及其生产者和观察者)

Did you try to annotate your class also with @Specializes (@Alternative @Specializes)?According to Weld Reference this way you can completely "hide" the other bean (with its producers and observers)

这篇关于如何在网络应用程序中使用@Alternative扩展具体类?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-12 23:10