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Nullpointer issue in 3.0-FL-2011-04-07 #18

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
It seems that with every access to an autowired component in 3.0-FL-2011-04-07 
causes a nullpointer exception.

The stacktrace is:

SEVERE: Servlet.service() for servlet zkLoader threw exception
java.lang.NullPointerException
    at org.zkoss.zk.ui.AbstractComponent$$FastClassByCGLIB$$e766a364.invoke(<generated>)
    at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
    at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:688)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
    at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:621)
    at org.zkoss.zul.Div$$EnhancerByCGLIB$$e59ed576.getChildren(<generated>)
    at org.zkoss.test.springcomposer.NullpointerTestController.doAfterCompose(NullpointerTestController.java:24)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:740)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:686)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:630)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:597)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:383)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:306)
    at org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:225)
    at org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:146)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:680)

I've attached a sample zul/java file that reproduces the problem.

Thanks & Bye,
    chris

Original issue reported on code.google.com by Christia...@gmail.com on 8 Apr 2011 at 3:10

Attachments:

GoogleCodeExporter commented 9 years ago 
Hi Chris,
ZK component injection with @Autowired annotation is done by 
GenericSpringComposer. Please extend your class from it and see this article 
http://books.zkoss.org/wiki/ZK%20Spring%20Essentials/Working%20with%20ZK%20Sprin
g/Working%20with%20ZK%20Spring%20Core/Inject%20ZK%20Components%20in%20Spring%20B
eans

Original comment by ashish.dasnurkar on 11 Apr 2011 at 1:44