1 Reply Latest reply on Dec 3, 2007 12:10 PM by Pete Muir

    Backing and session bean communication error

    Vasilis BnUser Newbie

      I have implemented a session bean to keep parameter values that will be used by the entire application.This is the simplest form of my session bean:

      @Stateful
      @Name("cart")
      @Scope(SESSION)
      public class Brtest implements BrtestI,Serializable{
      
       static final long serialVersionUID = 8722576722482084467L;
      
       @PersistenceContext(type=PersistenceContextType.EXTENDED)
       EntityManager em;
      
       public String getCart() {
       return "hello";
       }
      
       @Destroy
       @Remove
       public void destroy() {}
      
      }
      


      I have to inject an instance of the previous session bean in one of my backing beam following the dvd store example of the seam examples and this is my code:

      @Stateful
      @Name("testSession")
      public class TestSessionManager extends TestSessionManager implements serialisable{
      
       @In(create=true) Brtest cart;
      
       @PersistenceContext(type=PersistenceContextType.EXTENDED)
       private EntityManager em;
      
       static final long serialVersionUID = -6536629890251170098L;
      
       @In
       protected FacesContext facesContext;
      
       protected void getValueFromSession(){
       cart.getCart();
       }
      
      


      The exception thrown is this:


      Caused by: javax.ejb.EJBTransactionRolledbackException: java.lang.IllegalArgumentException: could not set field value: testSession.cart
      at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:93)
      at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130)
      at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
      at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:203)
      at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98)
      at $Proxy341.getUsername(Unknown Source)
      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.jboss.seam.util.Reflections.invoke(Reflections.java:20)
      at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
      at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:72)
      at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57)
      at org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40)
      at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
      at org.jboss.seam.interceptors.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:31)
      at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
      at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
      at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:50)
      at org.javassist.tmp.java.lang.Object_$$_javassist_290.getUsername(Object_$$_javassist_290.java)
      ... 73 more
      Caused by: java.lang.IllegalArgumentException: could not set field value: testSession.cart
      at org.jboss.seam.Component.setFieldValue(Component.java:1559)
      at org.jboss.seam.Component.access$500(Component.java:135)
      at org.jboss.seam.Component$BijectedField.set(Component.java:2285)
      at org.jboss.seam.Component.injectAttributes(Component.java:1368)
      at org.jboss.seam.Component.inject(Component.java:1195)
      at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
      at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
      at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27)
      at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69)
      at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103)
      at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:53)
      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.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118)
      at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:71)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:46)
      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
      at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
      ... 104 more
      Caused by: java.lang.IllegalArgumentException: Could not set field value by reflection: TestSessionManager.cart on: twp.session.TestSessionManager with value: class org.javassist.tmp.java.lang.Object_$$_javassist_291
      at org.jboss.seam.util.Reflections.set(Reflections.java:77)
      at org.jboss.seam.Component.setFieldValue(Component.java:1555)
      ... 128 more
      Caused by: java.lang.IllegalArgumentException
      at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)
      at java.lang.reflect.Field.set(Field.java:656)
      at org.jboss.seam.util.Reflections.set(Reflections.java:63)
      ... 129 more



      Does anyone know what may cause this exception? Is there any additional configuration to be made (such as property files) in order a backing bean to communicate with the session bean?