Java.lang.UnsupportedOperationException in JPA transaction
I'm sure I don't understand something about JPA (I am using OpenJPA) and this is causing this problem. I want to make a copy of a Job object.
@Entity
@Table(name="Job")
public class Job implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
@ManyToOne
private Job job;
@OneToMany(fetch = FetchType.EAGER)
private Set<Job> jobCollection;
...
public Job getJob() {
return this.job;
}
public void setJob(Job job) {
this.job = job;
}
public Set<Job> getCopies() {
return this.jobCollection;
}
public void setCopies(Set<Job> jobCollection) {
this.jobCollection = jobCollection;
}
}
Executing the following code works as I expected when creating the first copy.
public void testCopyJob(){
Job job = jobManager.findJobById(100);
Job jobWithCopies = null;
try {
jobWithCopies = jobManager.copyJob(job, "test copy");
} catch (Exception e) {
fail(e.getMessage());
}
Set<Job> copies = jobWithCopies.getCopies();
assertEquals("num copies", 1, copies.size());
//make a second copy
Job jobWithCopies2 = null;
try {
jobWithCopies2 = jobManager.copyJob(jobWithCopies, "test copy");
assertEquals("multiple copies", 2, jobWithCopies2.getCopies().size());
} catch (Exception e) {
e.printStackTrace();
fail(e.getMessage());
}
}
Trying to create a second copy will not work with ...
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R <openjpa-1.2.1-SNAPSHOT-r422266:686069 fatal general error> org.apache.openjpa.persistence.PersistenceException: null
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1688)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.StateManagerImpl.assignObjectId(StateManagerImpl.java:523)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.StateManagerImpl.assignField(StateManagerImpl.java:608)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.StateManagerImpl.beforeAccessField(StateManagerImpl.java:1494)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.StateManagerImpl.accessingField(StateManagerImpl.java:1477)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at entities.Job.pcGetid(Job.java)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at entities.Job.hashCode(Job.java:402)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at java.util.HashMap.putImpl(Unknown Source)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at java.util.HashMap.put(Unknown Source)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at java.util.HashSet.add(Unknown Source)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.util.java$util$HashSet$proxy.add(Unknown Source)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at entities.controller.JobManager.copyJob(JobManager.java:140)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at entities.controller.JobManagerTest.testCopyJob(JobManagerTest.java:55)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:45)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at java.lang.reflect.Method.invoke(Method.java:599)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestCase.runTest(TestCase.java:154)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestCase.runBare(TestCase.java:127)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestResult$1.protect(TestResult.java:106)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestResult.runProtected(TestResult.java:124)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestResult.run(TestResult.java:109)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestCase.run(TestCase.java:118)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestSuite.runTest(TestSuite.java:208)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at junit.framework.TestSuite.run(TestSuite.java:203)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.cactus.server.runner.ServletTestRunner.run(ServletTestRunner.java:309)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.cactus.server.runner.ServletTestRunner.doGet_aroundBody0(ServletTestRunner.java:187)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.cactus.server.runner.ServletTestRunner.doGet_aroundBody1$advice(ServletTestRunner.java:225)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.cactus.server.runner.ServletTestRunner.doGet(ServletTestRunner.java:1)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1449)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:790)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:443)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3610)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:274)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:926)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1557)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:173)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:272)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:202)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:766)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:896)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R Caused by: java.lang.UnsupportedOperationException
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.DetachedStateManager.getMetaData(DetachedStateManager.java:696)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.meta.strats.UntypedPCValueHandler.toRelationDataStoreValue(UntypedPCValueHandler.java:121)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.sql.RowImpl.setRelationId(RowImpl.java:327)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.sql.SecondaryRow.setRelationId(SecondaryRow.java:106)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.meta.strats.HandlerStrategies.set(HandlerStrategies.java:150)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.meta.strats.HandlerStrategies.set(HandlerStrategies.java:104)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.meta.strats.HandlerCollectionTableFieldStrategy.insert(HandlerCollectionTableFieldStrategy.java:154)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.meta.strats.HandlerCollectionTableFieldStrategy.insert(HandlerCollectionTableFieldStrategy.java:130)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.meta.FieldMapping.insert(FieldMapping.java:579)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.insert(AbstractUpdateManager.java:197)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.populateRowManager(AbstractUpdateManager.java:139)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.persistence.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:73)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at com.ibm.ws.persistence.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:60)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.flush(JDBCStoreManager.java:655)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.DelegatingStoreManager.flush(DelegatingStoreManager.java:130)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2010)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:1908)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1679)
[11/25/08 8:46:56:546 EST] 00000018 SystemErr R ... 52 more
This exception is thrown in the JobManager.copyJob () method (in the line: attachJob.getCopies (). Add (newJob);) ...
@JPAManager(targetEntity=entities.Job.class)
public class JobManager {
private EntityManager getEntityManager() {
EntityManagerFactory emf = Persistence
.createEntityManagerFactory("import");
return emf.createEntityManager();
}
@Action(Action.ACTION_TYPE.FIND)
public Job findJobById(int id) {
EntityManager em = getEntityManager();
Job job = null;
try {
job = (Job) em.find(Job.class, id);
} finally {
em.close();
}
return job;
}
public Job copyJob(Job job, String newJobName) throws Exception {
EntityManager em = getEntityManager();
Job attachedJob = null;
try {
em.getTransaction().begin();
//merge any changes made to job
attachedJob = em.merge(job);
//copy the job and establish bi-directional relationship
Job newJob = new Job(job);
newJob.setName(newJobName);
newJob.setJob(attachedJob);
em.persist(newJob);
attachedJob.getCopies().add(newJob);
em.getTransaction().commit(); //commit changes to original job
} catch (Exception ex) {
try {
if (em.getTransaction().isActive()) {
em.getTransaction().rollback();
}
} catch (Exception e) {
ex.printStackTrace();
throw e;
}
throw ex;
} finally {
em.close();
}
return attachedJob;
}
}
This is the generated DB schema that I am using ...
CREATE TABLE Job (id INTEGER NOT NULL GENERATED BY DEFAULT AS IDENTITY, JOB_ID INTEGER, PRIMARY KEY (id));
CREATE TABLE Job_jobCollection (JOB_ID INTEGER, element VARCHAR(254));
ALTER TABLE Job ADD FOREIGN KEY (JOB_ID) REFERENCES Job (id);
ALTER TABLE Job_jobCollection ADD FOREIGN KEY (JOB_ID) REFERENCES Job (id);
A glance at the OpenJPA 1.2 source code shows that the DetachedStateManager.getMetaData () method is not implemented, so I wonder why it is being called. Any advice?
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2 answers
You are not showing what your implementation of the copy constructor is for a Job, but if you copy an id from one Job as the copy id of that job, then the attempt to save the copy job will fail because JPA will know that the Job instance with that Id lives in another object, and this original object must be preserved.
It looks like your problem is actually hashCode and your example shows that you don't have a hashCode implementation. Looks like openjpa has instructed you to implement hashCode based on Id value. When you add something to a Set, the Set calls hashCode () on your object as part of the process of determining if the object is in the Set.
I would try to change id from int to Integer (openjpa seems to be trying to assign from an object, which might just be a nested Integer). Or implement your own hash code that simply returns the Id value.
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