运行CXF JAX-RS 2.0客户端“目标"时出现NullPointerException.线程下的Liberty Profile中的方法 [英] NullPointerException when running CXF JAX-RS 2.0 client "target" method in Liberty Profile under a Thread

问题描述

我在Liberty Profile 8.5.5.6中有一些运行正常的JAX-RS 2.0客户端.它们都可以按顺序正常工作，但是我想在一个线程中执行其中的一些，以便它们同时运行.当我尝试通过以下方式在FutureTask中获取目标"时:

I have some JAX-RS 2.0 clients running ok in Liberty Profile 8.5.5.6. They are all working ok sequentially, but I want to execute some of them in a Thread so they run concurrently. When I try to get a "target" inside a FutureTask with:

 WebTarget myResource = client.target(apiURLBase + ...);

在此com.ibm.ws ...类中，我得到了NullPointerExcepton:

I get NullPointerExcepton in this com.ibm.ws... class:

Caused by: java.lang.NullPointerException
     at com.ibm.ws.jaxrs20.client.bus.LibertyJAXRSClientBusFactory.getClientScopeBus(LibertyJAXRSClientBusFactory.java:89)
     at com.ibm.ws.jaxrs20.client.JAXRSClientImpl.target(JAXRSClientImpl.java:109)
     at org.apache.cxf.jaxrs.client.spec.ClientImpl.target(ClientImpl.java:100)
     at com.servengine.watson.naturallanguageclassifier.NaturalLanguageClassifierRESTClient.classify(NaturalLanguageClassifierRESTClient.java:161)
     at com.servengine.watson.naturallanguageclassifier.NaturalLanguageClassifierRESTClient$Proxy$_$$_WeldClientProxy.classify(Unknown Source)
     at com.skios.eliza.nlq.NaturalLanguageQueryFlowView$1.call(NaturalLanguageQueryFlowView.java:66)
     at com.skios.eliza.nlq.NaturalLanguageQueryFlowView$1.call(NaturalLanguageQueryFlowView.java:1)
     at java.util.concurrent.FutureTask.run(FutureTask.java:266)

不能在主"线程中使用CXF吗?我想念什么?

CXF cannot be used out of "main" Thread? What am I missing?

感谢您的帮助.

推荐答案

如果要在派生的新线程中使用客户端API，则需要确保新线程是容器托管的.您可以启用并发1.0功能.然后使用:

If you want to use the client API in a forked new thread, you need to make sure the new thread is a container managed one. In your case, you can enable concurrent-1.0 feature. Then use:

@Resource(name ="java:comp/DefaultManagedExecutorServcie") ManagedExecutorService执行程序；

@Resource(name="java:comp/DefaultManagedExecutorServcie") ManagedExecutorService executor;

 Task task = new Task();    
 Future<String> result = executor.submit(task);

在您的Task类中，您可以做与以前相同的事情:WebTarget myResource = client.target(apiURLBase + ...);

In Your Task class, you can do the same thing with what you done before: WebTarget myResource = client.target(apiURLBase + ...);

这篇关于运行CXF JAX-RS 2.0客户端“目标"时出现NullPointerException.线程下的Liberty Profile中的方法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IT屋！