如何从另一个线程更新GUI? [英] How to update the GUI from another thread?

问题描述

我的 JSF 应用程序中的线程有问题，也许有人可以帮助我.

I have a problem with threads in my JSF application, maybe somebody could help me.

启动后，我运行新线程，该线程正在执行一些后台操作.该线程在while(true)循环中工作，但是当它无能为力时，它将调用wait().之所以处于循环状态，是因为我必须在执行某些用户操作后调用notify().

After the start I run new thread which is making some background operations. This thread is working in while(true)-loop but when there is nothing it can do it calls wait(). It's working in loop because I have to call notify() after some user actions.

现在我要完成的事情是:我希望线程通知主线程作业的一部分已经完成，因此我可以更新UI中的某些元素.有什么想法吗?

So now what I want to acomplish: I would like the thread to inform the main thread that the part of the job is finished, so I can update some elements in UI. Any ideas?

我也想显示FacesMessage，但是不可能从另一个线程显示(即使使用观察者模式)

I would also like to display FacesMessage, but it's imposible to do so from another thread (even using Observer pattern)

推荐答案

也许您可以使用ICEfaces服务器端推送进行异步后台工作来解决您的问题.
请查看 http://auctionmonitor.icefaces.org/auctionMonitor/auctionMonitor.jsf以推技术为例.

Maybe you can solve your problem with asynchronous background work with ICEfaces server side push.
Pleas take a look at http://auctionmonitor.icefaces.org/auctionMonitor/auctionMonitor.jsf for an example of the push technology.

您的后台工作线程可以执行推送"，这将通知"某些页面进行更新(部分)并显示您的消息.

Your background working thread could perform a "push", which will "notify" certain pages to update (partially) and display your message.

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