Hi all,
I am using JBoss 4.2.2GA and Java(TM) SE Runtime Environment (build
1.6.0_05-b13) for my development environment.
I have a stateless session bean called UtilityBean and an interfaces called
UtilityBeanLocal, marked with @Local and the bean marked with @stateless and
implements serializable and the local-interface.
When I try to make a lookup through InitalContext I get a Proxy-Object, which
cannot be casted to the local interface.
Stacktrace:
anonymous wrote :
| 20:05:44,843 ERROR [STDERR] java.lang.ClassCastException: $Proxy94 cannot
be cast to test.ejb.stateless.UtilityBeanLocal
| 20:05:44,843 ERROR [STDERR] at
test.service.helper.ApplicationHelper.getApplicationSettings(ApplicationHelper.java:23)
| 20:05:44,843 ERROR [STDERR] at
test.service.helper.RegistrationHelper.isUsernameLongEnough(RegistrationHelper.java:32)
| 20:05:44,843 ERROR [STDERR] at
test.web.beans.RegistrationBean.checkUserComplete(RegistrationBean.java:395)
| 20:05:44,843 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| 20:05:44,843 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| 20:05:44,843 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| 20:05:44,843 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
| 20:05:44,843 ERROR [STDERR] at
org.apache.el.parser.AstValue.invoke(AstValue.java:131)
| 20:05:44,843 ERROR [STDERR] at
org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
| 20:05:44,843 ERROR [STDERR] at
org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68)
| 20:05:44,843 ERROR [STDERR] at
javax.faces.validator.MethodExpressionValidator.validate(MethodExpressionValidator.java:84)
| 20:05:44,843 ERROR [STDERR] at
javax.faces.component.UIInput.validateValue(UIInput.java:1013)
| 20:05:44,843 ERROR [STDERR] at
javax.faces.component.UIInput.validate(UIInput.java:867)
| 20:05:44,843 ERROR [STDERR] at
javax.faces.component.UIInput.executeValidate(UIInput.java:1065)
| 20:05:44,843 ERROR [STDERR] at
javax.faces.component.UIInput.processValidators(UIInput.java:666)
| 20:05:44,843 ERROR [STDERR] at
org.ajax4jsf.component.AjaxViewRoot.processValidators(AjaxViewRoot.java:335)
| 20:05:44,843 ERROR [STDERR] at
com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:100)
| 20:05:44,843 ERROR [STDERR] at
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
| 20:05:44,843 ERROR [STDERR] at
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
| 20:05:44,843 ERROR [STDERR] at
javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
| 20:05:44,843 ERROR [STDERR] at
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
| 20:05:44,843 ERROR [STDERR] at
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
| 20:05:44,843 ERROR [STDERR] at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
| 20:05:44,843 ERROR [STDERR] at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
| 20:05:44,843 ERROR [STDERR] at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
| 20:05:44,843 ERROR [STDERR] at
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
| 20:05:44,843 ERROR [STDERR] at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
| 20:05:44,843 ERROR [STDERR] at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
| 20:05:44,843 ERROR [STDERR] at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
| 20:05:44,843 ERROR [STDERR] at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
| 20:05:44,843 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)
The following code shows the part, which displays all implemented interfaces of
the object:
| System.out.println(obj.getClass().getName());
| Class[] interfaces = obj.getClass().getInterfaces();
| for (int i = 0; i < interfaces.length; ++i) {
| System.out.println(interfaces.getName());
| }
Output:anonymous wrote : 20:05:44,843 INFO [STDOUT] $Proxy94
| 20:05:44,843 INFO [STDOUT] test.ejb.stateless.UtilityBeanLocal
| 20:05:44,843 INFO [STDOUT] org.jboss.ejb3.JBossProxy
Stateless Bean:
| @Stateless
| public class UtilityBean implements UtilityBeanLocal, Serializable,
Constants {
| private static final long serialVersionUID = 1L;
| ......
|
Interface:
| @Local
| public interface UtilityBeanLocal {
| public static final String JNDI_NAME = "UtilityBeanLocal";
| public ApplicationSettings getApplicationSettings();
| }
Context-Lookup:
| public class BeanLocator {
| public static final String JNDI_PREFIX = "java:comp/env/ejb/";
| private static transient BeanLocator instance = null;
| private InitialContext initialcontext = null;
|
|
//--------------------------------------------------------------------------
| private BeanLocator() {
| try {
| Properties props = new Properties();
|
props.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
| props.put(Context.PROVIDER_URL,"jnp://localhost:1099");
|
props.put(Context.URL_PKG_PREFIXES,"org.jboss.naming.jnp.interfaces");
| //Context ctx = new InitialContext(props);
| this.initialcontext = new InitialContext(props);
| } catch (NamingException e) {
| //e.printStackTrace();
| this.initialcontext = null;
| }
| }
|
|
//--------------------------------------------------------------------------
| public static BeanLocator getInstance() {
| if (instance == null) {
| instance = new BeanLocator();
| }
| return instance;
| }
|
|
//--------------------------------------------------------------------------
| public Object locate(String jndiName, Class<?> clazz) throws
NamingException {
| Object obj = null;
| if (this.initialcontext != null) {
| //obj =
PortableRemoteObject.narrow(initialcontext.lookup(jndiName), clazz);
| obj = initialcontext.lookup(jndiName);
|
| System.out.println(obj.getClass().getName());
| Class[] interfaces = obj.getClass().getInterfaces();
| for (int i = 0; i < interfaces.length; ++i) {
| System.out.println(interfaces.getName());
| }
| }
| return obj;
| }
| }
It is not working with or without passing the properties to the context.
The main question is, why I cannot cast, even if the interface is implemented???
What am I missing? Does anybody has a clue?
Thanks in advance and best regards,
Thomas
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