带有CDI bean和@ConversationScoped的AJAX页面 [英] AJAX pages with CDI beans and @ConversationScoped

问题描述

我很感兴趣，当我使用CDI时，将JSF页面与AJAX一起使用的正确方法是什么? 我测试了使用@SessionScoped配置CDI Bean，但是我发现AJAX存在问题.

I'm interested What is the proper way to use JSF pages with AJAX when I use CDI. I tested to configure the CDI beans with @SessionScoped but I found that there is a problem with AJAX.

将AJAX与配置了@ConversationScoped的CDI bean一起使用是否合适?

Is it proper to use AJAX with CDI beans configured with @ConversationScoped?

我发现必须将conversation.begin();放入Bean构造函数中，并将conversation.end();放入Java方法中，这必须在会话完成时进行.我可以以某种方式自动执行此操作吗?

And I found that I have to put conversation.begin(); into the Bean constructor and conversation.end(); into Java method which must be when the session is completed. Can I somehow do this automatically?

P.S当用户关闭页面时，我可以使用此代码自动释放资源吗?

P.S Can I use this code to automatically free the resource when the user closes the page?

@Remove
public void finishIt(){
     conversation.end();
}

推荐答案

我发现我必须将conversation.begin();放入Bean构造函数中，并将conversation.end();放入Java方法中，这必须在会话完成时进行.

And I found that I have to put conversation.begin(); into the Bean constructor and conversation.end(); into Java method which must be when the session is completed.

是正确的.另请参见如何用CDI替换@ManagedBean/@ViewScope JSF 2.0/2.1 中的代码示例.

That's correct. See also among others How to replace @ManagedBean / @ViewScope by CDI in JSF 2.0/2.1 for a concrete code example.

我能以某种方式自动执行此操作吗?

不.考虑安装 MyFaces CODI .它将把JSF @ViewScoped桥接到CDI.这样，您可以只使用@Named @ViewScoped.但是，缺点是它会使用windowId请求参数来污染URL.

No. Consider installing MyFaces CODI. It will bridge the JSF @ViewScoped to CDI. This way you can just use @Named @ViewScoped. A disadvantage is however that it pollutes the URL with windowId request parameter.

MyFaces CODI还提供了@ViewAccessScoped，只要您在视图中引用所需的bean，无论您坐在哪个视图，它都将一直存在.一旦导航到一个在任何地方都没有引用bean的视图， ，它将被丢弃.

MyFaces CODI also offers the @ViewAccessScoped which will live as long as you reference the desired bean in a view, regardless of the view you're sitting in. Once you navigate to a view which doesn't reference the bean anywhere, it will be trashed.

或者，如果有耐心，请等待JSF 2.2发布.它将附带与CDI兼容的@ViewScoped ，因此您不需要MyFaces CODI

Or, if you have patience, wait for JSF 2.2 to be released. It will come with a CDI compatible @ViewScoped so that you don't need MyFaces CODI.

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