[Persistence, JBoss/CMP, Hibernate, Database] - setParameter: weird query behaviour
by mgombocz
Hi folks,
I am using Seam, JBoss AS, Facelets, MyFaces and would like to create application-scoped components (lists with salutations, titles etc.) for filling dropdown lists.
I am doing that by having a SLSB with a @Factory method that initially fills my outjected variable "salutationItems".
In the @Factory method I call "createQuery":
Query query = em.createQuery("SELECT new javax.faces.model.SelectItem(s.value, s.label) FROM StringListItem s WHERE s.listType = '
| SALUTATION' ORDER BY s.label");
| salutationItems = query.getResultList();In this case everything works fine!
But, as soon as I want to use "setParameter" instead of the hardcoded Select statement...Query query = em.createQuery("SELECT new javax.faces.model.SelectItem(s.value, s.label) FROM StringListItem s WHERE s.listType = :lType ORDER BY s.label");
| query.setParameter("lType", "SALUTATION");
| salutationItems = query.getResultList();
...I get the error when I call the JSF page:javax.ejb.EJBTransactionRolledbackException: java.lang.ClassCastException: java.lang.String
| 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: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.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:6
| 2)
| 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.stateless.StatelessContainer.localInvoke(StatelessContainer.java:181)
| at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:79)
| at $Proxy496.loadSalutations(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:13)
| at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:32)
| at org.jboss.seam.Component.callComponentMethod(Component.java:1334)
| at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1293)
| at org.jboss.seam.Component.getInstance(Component.java:1260)
| ...
At the end of a bunch of exception stack traces there is a last log info:
01:18:13,375 INFO [ConnectionManager] forcing batcher resource cleanup on transaction completion;
| forgot to close ScrollableResults/Iterator?
I am trying on my own for days now and give up...
Could anyone of you please help me?
Thanks!
PS. Here's the complete code:
@Stateless
| @Name("stringLists")
| public class StringListManager implements StringListManagerLocal {
|
| @Logger
| Log log;
|
| @PersistenceContext
| private EntityManager em;
|
| @Out(scope = ScopeType.APPLICATION)
| private List<SelectItem> salutationItems;
|
| @Factory("salutationItems")
| public void loadSalutations() {
| log.info("Start loading salutationItem");
|
| Query query = em
| .createQuery("SELECT new javax.faces.model.SelectItem(s.value, s.label) FROM StringListItem s WHERE s.listType = :
| lType ORDER BY s.label");
| query.setParameter("lType", "SALUTATION");
|
| salutationItems = query.getResultList();
|
| log.info("End loading salutationItem. Count: "+ salutationItems.size());
| }
| }
Part of the JSF page:
| <h:selectOneMenu id="salut">
| <f:selectItems value="#{salutationItems}" />
| </h:selectOneMenu>
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19 years, 7 months