3 Replies Latest reply on Nov 18, 2010 6:56 AM by robsonximenes

    Another Interceptor Problem

    cleverson.sacramento
    cleverson.sacramento Aug 12, 2010 9:45 AM

      I'm getting the following error when I try to use my Interceptor: Duplicate interceptor class definition...


      I will provide a example to simulate the error. At first step, I created my InterceptorBinding like this:


      @InterceptorBinding @Target(TYPE) @Retention(RUNTIME)
public @interface MyInterceptorBinding {
}



      Then I created my Interceptor:


      @Interceptor @MyInterceptorBinding
public class MyInterceptor {

     @AroundInvoke
     public Object manage(final InvocationContext ctx) throws Exception {
          return ctx.proceed();
     }
}



      ... and my Stereotype annotation.


      @Stereotype @Named @MyInterceptorBinding @Target(TYPE) @Retention(RUNTIME)
public @interface MyStereotype {
}



      The fail occurs when I use my own object.


      public class MyObject {
}



      This is my managed bean:


      @MyStereotype
public class MyManagedBean extends MySuperClass<MyObject> {

     @Override
     public MyObject perform() {
          return null;
     }
}



      And this is its super class:


      public abstract class MySuperClass<T> {

     public T perform() {
          return null;
     }
}




      I registered my interceptor in bean.xml.


      <?xml version="1.0"?>
<beans xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/beans_1_0.xsd">

     <interceptors>
          <class>MyInterceptor</class>
     </interceptors>
</beans>




      When I try to start my servlet container, I get this stack trace:



      # SEVERE: Exception sending context initialized event to listener instance of class org.jboss.weld.environment.servlet.Listener
org.jboss.interceptor.InterceptorException: Duplicate interceptor class definition when bindingorg.jboss.weld.bean-flat-Interceptor-MyInterceptor on AROUND_INVOKE
     at org.jboss.interceptor.model.InterceptionModelImpl.validateDuplicateInterceptors(InterceptionModelImpl.java:150)
     at org.jboss.interceptor.model.InterceptionModelImpl.appendInterceptorClassesToList(InterceptionModelImpl.java:138)
     at org.jboss.interceptor.model.InterceptionModelImpl.appendInterceptors(InterceptionModelImpl.java:131)
     at org.jboss.interceptor.model.InterceptionModelBuilder$MethodInterceptorDescriptor.with(InterceptionModelBuilder.java:111)
     at org.jboss.weld.bean.AbstractClassBean.initCdiBoundInterceptors(AbstractClassBean.java:435)
     at org.jboss.weld.bean.AbstractClassBean.initialize(AbstractClassBean.java:178)
     at org.jboss.weld.bean.ManagedBean.initialize(ManagedBean.java:365)
     at org.jboss.weld.bootstrap.AbstractBeanDeployer.deploy(AbstractBeanDeployer.java:110)
     at org.jboss.weld.bootstrap.BeanDeployment.deployBeans(BeanDeployment.java:151)
     at org.jboss.weld.bootstrap.WeldBootstrap.deployBeans(WeldBootstrap.java:377)
     at org.jboss.weld.environment.servlet.Listener.contextInitialized(Listener.java:171)
     at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
     at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
     at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
     at org.apache.catalina.core.StandardService.start(StandardService.java:516)
     at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
     at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
     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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
     at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)



      But, if I comment the super class method, it works! :P


      public abstract class MySuperClass<T> {

     // public T perform() {
     //      return null;
     // }
}




      If I use a java bluit-in class (like Object, String, Integer) instead of MyObject class, it works too! :P :P




      @MyStereotype
public class MyManagedBean extends MySuperClass<Object> {

     @Override
     public Object perform() {
          return null;
     }
}



      public abstract class MySuperClass<T> {

     public T perform() {
          return null;
     }
}




      On my tests, I used the folowing Weld version:


      <dependency>
     <groupId>org.jboss.weld</groupId>
     <artifactId>weld-core</artifactId>
     <version>1.0.1-SP4</version>
     <scope>compile</scope>
</dependency>
<dependency>
     <groupId>org.jboss.weld.servlet</groupId>
     <artifactId>weld-servlet</artifactId>
     <version>1.0.1-Final</version>
     <scope>compile</scope>
</dependency>




      ...and this too:


      <dependency>
     <groupId>org.jboss.weld</groupId>
     <artifactId>weld-core</artifactId>
     <version>1.1.0-SNAPSHOT</version>
     <scope>compile</scope>
</dependency>
<dependency>
     <groupId>org.jboss.weld.servlet</groupId>
     <artifactId>weld-servlet</artifactId>
     <version>1.1.0-SNAPSHOT</version>
     <scope>compile</scope>
</dependency>




      Both generate the fail.