hello every body!
I've got a 1-to-many relationship set up, but it's not working.
It's about polls and its answers.
So I have a session bean that creates the entity beans and, in a lopp,
assigns each answer to the poll.
that's the piece of code that makes it:
try{
System.out.println("Passei pelo session facade");
Context context = EJBClient.getJNDIContext();
Object refPoll= context.lookup(PollHome.JNDI_NAME);
PollHome pollHome = (PollHome) PortableRemoteObject.narrow(refPoll,
PollHome.class);
Poll poll = pollHome.create(pv);
Object refAnswer= context.lookup(AnswerHome.JNDI_NAME);
AnswerHome answerHome = (AnswerHome) PortableRemoteObject.narrow(refAnswer,
AnswerHome.class);
AnswerValue[] answers = pv.getAnswers();
for(int i=0; i<answers.length; i++){
Answer answer = answerHome.create(answers[i]);
poll.assignAnswer(answer);
}
return poll.getValueObject();
}catch(Exception e){
System.out.println("Nao foi poss�vel localizar objeto no servidor.");
e.printStackTrace();
return null;
}
So my PollEJB is a CMP 2.x one, and the piece of code reponsible for the
relationship is the following:
//CMR fields
public abstract void setAnswers(Set answers);
public abstract Set getAnswers();
//Business methods
public void assignAnswer(Answer a){
Set answers = getAnswers();
answers.add(a);
}
And the ejb-jar is the following:
<!-- Relationships -->
<relationships>
<ejb-relation>
<ejb-relation-name>Poll-Answers</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>poll-has-answers</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>cilix/ejb/Poll</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>answers</cmr-field-name>
<cmr-field-type>java.util.Set</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>answers-belongs-to-poll</ejb-relationship-role-n
ame>
<multiplicity>Many</multiplicity>
<cascade-delete/>
<relationship-role-source>
<ejb-name>cilix/ejb/Answer</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
</ejb-relation>
</relationships>
<!-- Assembly Descriptor -->
<assembly-descriptor >
<!-- finder permissions -->
<!-- transactions -->
<container-transaction >
<method >
<ejb-name>cilix/ejb/Poll</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
<container-transaction >
<method >
<ejb-name>cilix/ejb/Facade</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
<container-transaction >
<method >
<ejb-name>cilix/ejb/Answer</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
And when i try to run it, an exception inside the container implementation
is throwed:
16:46:41,684 ERROR [LogInterceptor] TransactionRolledbackException,
causedBy:
java.lang.NullPointerException
at
org.jboss.ejb.plugins.cmp.jdbc.bridge.RelationSet.add(RelationSet.java:86)
at
br.com.cilix.intranet.poll.ejb.entity.PollEJB.assignAnswer(PollEJB.java:54)
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.invoke(EntityContainer.ja
va:1194)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationIn
terceptor.java:95)
at
org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchron
izationInterceptor.java:308)
at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(Cach
edConnectionInterceptor.java:186)
at
org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInt
erceptor.java:90)
at
org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterce
ptor.java:152)
at
org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.jav
a:107)
at
org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterce
ptor.java:69)
at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor
.java:107)
at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.
java:178)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at
org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:13
0)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:203)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at
org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at
org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77
)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at org.jboss.proxy.ejb.EntityInterceptor.invoke(EntityInterceptor.java:116)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
at $Proxy50.assignAnswer(Unknown Source)
at
br.com.cilix.intranet.poll.ejb.session.stateless.FacadeBean.insertPoll(Facad
eBean.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(Stateles
sSessionContainer.java:660)
at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(Cach
edConnectionInterceptor.java:186)
at
org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSe
ssionInstanceInterceptor.java:77)
at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor
.java:107)
at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.
java:178)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at
org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:13
0)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:203)
at
org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.jav
a:313)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at
org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at
org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77
)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at
org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInter
ceptor.java:111)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
at $Proxy46.insertPoll(Unknown Source)
at
br.com.cilix.intranet.poll.ejb.session.stateless.BusinessDelegate.insertPoll
(BusinessDelegate.java:72)
at br.com.cilix.intranet.poll.servlet.NewPoll.service(NewPoll.java:56)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:260)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
46)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:643)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172
)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
at
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext(StandardPipeline.java:641)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.in
vokeNext(StandardPipeline.java:643)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1040)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151
)
at java.lang.Thread.run(Thread.java:536)
So i'd like to know what can I do to solve it. I think the problem is just a
little thing that is not right in my code.
with my best regards,
Fabiano
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