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https://issues.apache.org/activemq/browse/CAMEL-3341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=63398#action_63398
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Caspar MacRae commented on CAMEL-3341:
--------------------------------------
Thanks Claus.
> ProxyHelper and JMS component - need to start producer or fails with NPE
> ------------------------------------------------------------------------
>
> Key: CAMEL-3341
> URL: https://issues.apache.org/activemq/browse/CAMEL-3341
> Project: Apache Camel
> Issue Type: Bug
> Components: camel-core, camel-jms
> Affects Versions: 2.5.0
> Environment: linux (debian) 2.6, maven 2.2.1, pax-exam 1.2.2 (using
> latest felix and equinox)
> Reporter: Caspar MacRae
> Assignee: Claus Ibsen
> Fix For: 2.6.0
>
> Attachments: ProxyHelper.diff
>
>
> I've a very simple unit test (based on
> http://camel.apache.org/using-camelproxy.html) that works fine when using
> endpoint uri "direct:start" but fails with the following exception when using
> "activemq:somequeue"
> java.lang.NullPointerException
> at
> org.apache.camel.component.jms.JmsProducer.processInOut(JmsProducer.java:140)
> at
> org.apache.camel.component.jms.JmsProducer.process(JmsProducer.java:90)
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:91)
> at
> org.apache.camel.impl.DefaultAsyncProducer.process(DefaultAsyncProducer.java:37)
> at
> org.apache.camel.component.bean.CamelInvocationHandler.invoke(CamelInvocationHandler.java:65)
> at $Proxy7.sayWordTo(Unknown Source)
> at
> net.earcam.cdosgi.remoteserviceadmin.CamelProxyTest.simpleArgTest(CamelProxyTest.java:93)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
> at
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
> Looks like the problem is simply that the producer isn't started so never
> creates a UuidGenerator (needed for the JMS Reply-To)
> org.apache.camel.component.bean.ProxyHelper - lines 45 - 51, needs to start
> producer (for JmsProducer)
> /**
> * Creates a Proxy which sends PojoExchange to the endpoint.
> */
> @SuppressWarnings("unchecked")
> public static <T> T createProxy(Endpoint endpoint, ClassLoader cl,
> Class[] interfaces, MethodInfoCache methodCache) throws Exception {
> return (T) createProxyObject(endpoint, endpoint.createProducer(), cl,
> interfaces, methodCache);
> }
> As a workaround, simply create the producer, start it and use the overloaded
> method createProxy that takes a producer parameter.
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