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https://issues.apache.org/jira/browse/WICKET-1848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12634503#action_12634503
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Igor Vaynberg commented on WICKET-1848:
---------------------------------------
are you using some sort of class reloading tool like javarebel? once your
environment starts messing wint your classloading all kinds of stuff will start
breaking. why would the class be loaded twice to start with between you losing
the reference and getting one again?
> IllegalArgumentException while invoking method on injected proxy object
> (object is not an instance of declaring class)
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: WICKET-1848
> URL: https://issues.apache.org/jira/browse/WICKET-1848
> Project: Wicket
> Issue Type: Bug
> Components: wicket, wicket-extensions
> Affects Versions: 1.4-M3
> Reporter: Maarten Billemont
> Assignee: Igor Vaynberg
>
> The problem description:
> I have some EJB service beans which I'd like to use in my wicket application.
> The service beans implement @Local interfaces which all have a public static
> final String BINDING field that contains the JNDI binding of the bean that
> implements them. I use this BINDING field to lookup the bean and inject it
> into my Wicket pages using the JavaEEComponentInjector.
> The problem, however, occurs when accessing methods of these injected bean
> proxy objects. I'm not entirely sure what the cause is and I've noticed the
> issue to be rather unpredictable - probably due to the fact that I really
> don't get what's going wrong.
> In any case; for some reason when I invoke methods on my proxy objects,
> Wicket's proxy object's reflection seems unable to actually perform the call
> on the target object. I know far too little of how proxy objects work
> internally to understand what exactly is going on and what exactly might be
> failing to give any more details than this.
> I'm not sure whether this is an issue in wicket-ioc or wicket-contrib-javaee
> though seeing as the exception originates from within LazyInitProxyFactory
> I'm betting on wicket-ioc (which isn't in the list of components of this
> JIRA?)
> The exception:
> org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of interface
> org.apache.wicket.markup.html.form.IFormSubmitListener targeted at component
> [Marku
> at
> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:193)
> at
> org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
> at
> org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)
> at
> org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1188)
> at org.apache.wicket.RequestCycle.step(RequestCycle.java:1265)
> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1366)
> at org.apache.wicket.RequestCycle.request(RequestCycle.java:499)
> at
> org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387)
> at
> org.apache.wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:145)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
> 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
> net.link.safeonline.sdk.auth.filter.ContainerLoginFilter.doFilter(ContainerLoginFilter.java:70)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> net.link.safeonline.sdk.auth.filter.JAASLoginFilter.doFilter(JAASLoginFilter.java:93)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
> at
> org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
> at
> org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
> 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:446)
> at java.lang.Thread.run(Thread.java:595)
> Caused by: java.lang.reflect.InvocationTargetException
> 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:585)
> at
> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:182)
> ... 34 more
> Caused by: java.lang.IllegalArgumentException: object is not an instance of
> declaring class
> 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:585)
> at
> org.apache.wicket.proxy.LazyInitProxyFactory$JdkHandler.invoke(LazyInitProxyFactory.java:416)
> at org.apache.wicket.proxy.$Proxy1013.createAccount(Unknown Source)
> at
> net.link.safeonline.demo.bank.webapp.NewAccountPage$AccountForm.onSubmit(NewAccountPage.java:74)
> at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1347)
> at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:797)
> ... 39 more
> The (relevant) Wicket code:
> public class AccountApplication extends WebApplication {
> @Override
> protected void init() {
> addComponentInstantiationListener(new JavaEEComponentInjector(this,
> new IJndiNamingStrategy() {
> private final StandardJndiNamingStrategy defaultStrategy
> = new StandardJndiNamingStrategy();
> @SuppressWarnings("unchecked")
> public String calculateName(String ejbName, Class
> ejbType) {
> try {
> Field bindingField =
> ejbType.getDeclaredField("BINDING");
> Object binding = bindingField.get(null);
> if (binding != null)
> return binding.toString();
> } catch (Exception e) {
> ...
> }
> return this.defaultStrategy.calculateName(ejbName,
> ejbType);
> }
> }));
> }
> ...
> }
> public abstract class LayoutPage extends WebPage {
> @EJB
> transient AccountService accountService;
> ...
> }
> public class NewAccountPage extends LayoutPage {
> ...
> class AccountForm extends Form<String> {
> ...
> @Override
> protected void onSubmit() {
> accountService.createAccount(...);
> }
> }
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