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:
anonymous wrote :
|
| 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?
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