7:38 a.m.
I want to have an container-managed EJB which wraps the calls to jBpm, below is an example
of one of the methods i have created.
However, I do get this message from Hibernate(?), and cant see how I should correct my
code, isn't I closing correctly?
Any suggestions in general on how to build the EJB (should I throw other stuff into the
create/remove methods?)
| private JbpmConfiguration jbpmConfiguration = null;
|
| public void ejbCreate() throws CreateException {
| jbpmConfiguration = JbpmConfiguration.getInstance();
| }
|
| public void ejbRemove() throws EJBException, RemoteException {
| jbpmConfiguration = null;
| }
|
|
| public TaskTO getTaskInformation(long taskid) throws WorkflowEngineException,
DataNotFoundException {
| String logPrefix2 = logPrefix + ".getTaskInformation() ";
| log.debug(logPrefix2 + "Started. taskid=" + taskid);
|
| JbpmContext jbpmContext = null;
| TaskInstance myTaskInstance = null;
|
| try {
| jbpmContext = jbpmConfiguration.createJbpmContext();
| if (jbpmContext == null) {
| log.warn(logPrefix2 + "jbpmContext is null!");
| }
| } catch (Exception e) {
| String errMsg = "taskid=" + taskid + ", exception thrown by
createJbpmContext: " + e;
| log.error(logPrefix2 + errMsg);
| throw new WorkflowEngineException(errMsg);
| }
|
| TaskTO myTask = null;
|
| try {
| TaskMgmtSession taskMgmtSession = jbpmContext.getTaskMgmtSession();
| if (taskMgmtSession == null) {
| log.warn(logPrefix2 + "taskMgmtSession is null!");
| }
|
| myTaskInstance = taskMgmtSession.loadTaskInstance(taskid);
|
| if (myTaskInstance != null) {
| myTask = this.taskInstance2TaskTO(myTaskInstance);
| } else {
| log.warn(logPrefix2 + "myTaskInstance is null!");
| }
| } catch (Exception e) {
| String errMsg = "taskid=" + taskid + ", exception thrown by
getTaskMgmtSession/findTaskInstances: " + e;
| log.error(logPrefix2 + errMsg);
| throw new WorkflowEngineException(errMsg);
| } finally {
| jbpmContext.close();
| }
| return myTask;
| }
|
| 14:15:46,064 INFO : Closing a connection for you. Please close them yourself:
org.jboss.resource.adapter.jdbc.WrappedConnection@718c0c
| java.lang.Throwable: STACKTRACE
|
| at
org.jboss.resource.connectionmanager.CachedConnectionManager.registerConnection(CachedConnectionManager.java:333)
|
| at
org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:482)
|
| at
org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:894)
|
| at
org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:73)
|
| at
org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:69)
|
| at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:304)
|
| at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:109)
|
| at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:134)
|
| at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
|
| at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1236)
|
| at
org.jbpm.persistence.db.DbPersistenceService.getSession(DbPersistenceService.java:98)
|
| at
org.jbpm.persistence.db.DbPersistenceService.getTaskMgmtSession(DbPersistenceService.java:262)
|
| at org.jbpm.JbpmContext.getTaskMgmtSession(JbpmContext.java:545)
|
| at mystuff.WorkflowManagerBean.getTaskInformation(WorkflowManagerBean.java:362)
|
| at mystuff.WorkflowManagerBean.getUserHistory(WorkflowManagerBean.java:441)
|
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
|
| at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
|
| at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
|
| at java.lang.reflect.Method.invoke(Method.java:585)
|
| at org.jboss.invocation.Invocation.performCall(Invocation.java:345)
|
| at
org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:214)
|
| at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:149)
|
| at
org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:154)
|
| at
org.jboss.webservice.server.ServiceEndpointInterceptor.invoke(ServiceEndpointInterceptor.java:54)
|
| at
org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:48)
|
| at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:106)
|
| at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:335)
|
| at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:166)
|
| at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:153)
|
| at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192)
|
|
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