1 Reply Latest reply on Dec 10, 2002 2:14 PM by KimJohn Quinn

    Finder method returns a collection instead of a single objec

    KimJohn Quinn Newbie

      Hello all,

      Have a problem I've been struggling with for awhile now.

      I have a EJB with a finder method that is supposed to return a "single" argument in my remote home:

      public BusinessBeanRemote findByKey (String bizToken, PrimaryKey pk) throws FinderException, RemoteException;


      But when I call this method, it goes to the "findEntities" method in JBoss and tries to return to me a collection.

      As a temporary workaround, i have another finder that recieves that collection and extracts the element but I would like to fix this.

      So, my question is why am I dropping to a finder call that returns a collection as opposed to a single object?

      Any help on this would be appreciated...thanks.

      Here is the error returns without the hack...

      --------------------

      11:57:06,996 INFO [STDOUT] FindByPK
      11:57:07,016 ERROR [LogInterceptor] EJBException:
      javax.ejb.EJBException: result of finder method is not a valid return type: class com.x2.beans.testejb.TestPK
      at org.jboss.ejb.plugins.BMPPersistenceManager.findEntities(BMPPersistenceManager.java:378)
      at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.findEntities(CachedConnectionInterceptor.jav
      a:323)
      at org.jboss.ejb.EntityContainer.find(EntityContainer.java:665)
      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:324)
      at org.jboss.ejb.EntityContainer$ContainerInterceptor.invokeHome(EntityContainer.java:1119)
      at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invokeHome(EntitySynchronizationInterceptor.java:209)
      at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invokeHome(CachedConnectionInterceptor.java:
      215)
      at org.jboss.ejb.plugins.AbstractInterceptor.invokeHome(AbstractInterceptor.java:73)
      at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:88)
      at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
      at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
      at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:111)
      at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
      at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:52)
      at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:105)
      at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:129)
      at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
      at org.jboss.ejb.Container.invoke(Container.java:730)
      at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
      at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:381)
      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:324)
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
      at sun.rmi.transport.Transport$1.run(Transport.java:148)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
      at java.lang.Thread.run(Thread.java:536)