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
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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