Catching persistence exceptions within component methods
I have the following code that performs the creation of one User entity:
@Stateful
@Name("userManager")
@Scope(ScopeType.EVENT)
public class UserManagerAction implements UserManager {
@In
private User user;
@PersistenceContext
private EntityManager em;
public String create() {
try {
em.persist(user);
} catch(EntityExistsException e) {
facesMessages.add("Username already exists");
return Outcome.REDISPLAY;
}
}
In the above code, when the create method was executed, then the EntityExistsException was never caught. I only got a full stacktrace error in the console, and of course the message is not displayed.
After trying for a while to found the reason for this behaviour, I remember some issue I had when saving and trying to catch exceptions in a DAO using spring and Hibernate. The solution for this was execute the flush() method after every entity interaction. Then I added the line to the above code, and I had:
@Stateful
@Name("userManager")
@Scope(ScopeType.EVENT)
public class UserManagerAction implements UserManager {
@In
private User user;
@PersistenceContext
private EntityManager em;
public String create() {
try {
em.persist(user);
em.flush();
} catch(EntityExistsException e) {
facesMessages.add("Username already exists");
return Outcome.REDISPLAY;
}
}
After adding the em.flush() line , EntityExistsException was caught, the message added and the outcome correctly invoked. But in the console I still have the stacktrace:
Hibernate: insert into users (password, firstname, lastname, email, version, country, city, province, street, enabled, accountexpired, accountlocked, credentialsexpired, username) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) 18:36:46,823 WARN [JDBCExceptionReporter] SQL Error: 1062, SQLState: 23000 18:36:46,823 ERROR [JDBCExceptionReporter] Duplicate entry 'fer' for key 1 18:36:46,823 ERROR [AbstractFlushingEventListener] Could not synchronize database state with session org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:249) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:139) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:993) at org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:267) at org.jboss.ejb3.entity.TransactionScopedEntityManager.flush(TransactionScopedEntityManager.java:204) at com.jatun.jrbundler.action.UserManagerAction.create(UserManagerAction.java:55) 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.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112) at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166) at org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:37) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55) at org.jboss.seam.interceptors.BijectionInterceptor.bijectTargetComponent(BijectionInterceptor.java:51) at sun.reflect.GeneratedMethodAccessor70.invoke(Unknown Source) 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:18) at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) at org.jboss.seam.interceptors.OutcomeInterceptor.interceptOutcome(OutcomeInterceptor.java:23) at sun.reflect.GeneratedMethodAccessor69.invoke(Unknown Source) 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:18) at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) at org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:51) at sun.reflect.GeneratedMethodAccessor68.invoke(Unknown Source) 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:18) at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144) at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102) at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:49) at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source) 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:57) 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:47) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:201) 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:81) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78) 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:189) at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) at $Proxy51.create(Unknown Source) at com.jatun.jrbundler.action.UserManager$$FastClassByCGLIB$$9d570455.invoke(<generated>) at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45) at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:73) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55) at org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:39) at sun.reflect.GeneratedMethodAccessor72.invoke(Unknown Source) 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:18) at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) at org.jboss.seam.interceptors.ExceptionInterceptor.handleExceptions(ExceptionInterceptor.java:38) at sun.reflect.GeneratedMethodAccessor66.invoke(Unknown Source) 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:18) at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144) at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102) at org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:82) at org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:51) at com.jatun.jrbundler.action.UserManager$$EnhancerByCGLIB$$e4d9e3d0.create(<generated>) 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 com.sun.el.parser.AstValue.invoke(AstValue.java:151) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69) at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63) at javax.faces.component.UICommand.broadcast(UICommand.java:106) at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:94) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:168) at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343) at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86) at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.renderCycle(BlockingServlet.java:435) at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.receiveUpdates(BlockingServlet.java:423) at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:277) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Caused by: java.sql.BatchUpdateException: Duplicate entry 'fer' for key 1 at com.mysql.jdbc.ServerPreparedStatement.executeBatch(ServerPreparedStatement.java:652) at org.jboss.resource.adapter.jdbc.WrappedStatement.executeBatch(WrappedStatement.java:517) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:58) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242) ... 132 more
Is there some way this exception stacktrace don't be thrown?
By the way. In the example code I wrote above, should I use the sessionContext.setRollbackOnly() every time I catch persistence exceptions?
will the transaction rollback even when I catch the exception like I did (for the example it seem it works)?
Any help will be appreciated a lot.
Tkanks in advance.
