Hi,
I have following process definition.
<?xml version="1.0" encoding="UTF-8"?>
<process-definition xmlns="urn:jbpm.org:jpdl-3.2" name="simple">
<start-state name="start">
<transition name="Start" to="Step1"></transition>
</start-state>
<end-state name="end"></end-state>
<task-node name="Step1">
<task name="Step1">
<assignment class="com.sample.SimpleAssignmentHandler"></assignment>
</task>
<transition name="Step2" to="Step2"></transition>
</task-node>
<task-node name="Step2">
<task name="Step2"></task>
<transition name="End" to="end"></transition>
</task-node>
</process-definition>
i had deployed the process definition using below code.
JbpmContext jbpmContext = JbpmConfiguration.getInstance().createJbpmContext();
String businessKey="";
FileInputStream fis=new FileInputStream("D:/java_pro/simple.zip");
ZipInputStream zis=new ZipInputStream(new BufferedInputStream(fis));
ProcessDefinition processDefinition=ProcessDefinition.parseParZipInputStream(zis);
GraphSession gs=jbpmContext.getGraphSession();
gs.deployProcessDefinition(processDefinition);
for(int i=0;i<=5;i++){
ProcessInstance processInstance=jbpmContext.newProcessInstance(processDefinition.getName());
businessKey="KEY15102010"+i;
processInstance.setKey(businessKey);
//processInstance=jbpmContext.getProcessInstance(processInstance.getId());
Token token=processInstance.getRootToken();
Transition transition=(Transition)token.getAvailableTransitions().iterator().next();
token.signal(transition);
//jbpmContext.save(processInstance);
}
jbpmContext.close();
and i have writen the following code to end a process instance
JbpmContext jbpmContext = JbpmConfiguration.getInstance().createJbpmContext();
TaskInstance taskInstance=jbpmContext.getTaskInstance(2900);
ProcessInstance processInstance=taskInstance.getProcessInstance();
taskInstance.start();
Token token=taskInstance.getToken();
Transition transition=(Transition)token.getAvailableTransitions().iterator().next();
token.signal(transition);
taskInstance.end(transition);
jbpmContext.close();
but i am getting the following error if i am trying to execute above program.
22:58:40,656 [main] DEBUG GraphElement : event 'task-start' on 'Task(Step1)' for 'Token(/)'
22:58:41,562 [main] DEBUG GraphElement : event 'before-signal' on 'TaskNode(Step1)' for 'Token(/)'
22:58:41,609 [main] DEBUG GraphElement : event 'node-leave' on 'TaskNode(Step1)' for 'Token(/)'
22:58:41,609 [main] DEBUG GraphElement : event 'transition' on 'Transition(Step2)' for 'Token(/)'
22:58:41,734 [main] DEBUG GraphElement : event 'node-enter' on 'TaskNode(Step2)' for 'Token(/)'
22:58:41,796 [main] WARN StatefulPersistenceContext : Narrowing proxy to class org.jbpm.graph.node.TaskNode - this operation breaks ==
org.jbpm.persistence.JbpmPersistenceException: couldn't assign id to TaskInstance[Step2]
22:58:42,828 [main] WARN JDBCExceptionReporter : SQL Error: 1400, SQLState: 23000
22:58:42,828 [main] ERROR JDBCExceptionReporter : ORA-01400: cannot insert NULL into ("WORKFLOW"."JBPM_TASKINSTANCE"."ID_")
at org.jbpm.persistence.db.DbPersistenceService.assignId(DbPersistenceService.java:333)
at org.jbpm.svc.Services.assignId(Services.java:257)
at org.jbpm.taskmgmt.exe.TaskMgmtInstance.createTaskInstance(TaskMgmtInstance.java:116)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.taskmgmt.exe.TaskMgmtInstance$$EnhancerByCGLIB$$2c2b22b2.createTaskInstance(<generated>)
at org.jbpm.graph.node.TaskNode.execute(TaskNode.java:168)
at org.jbpm.graph.def.Node.enter(Node.java:319)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.graph.def.Node$$EnhancerByCGLIB$$d655f97c.enter(<generated>)
at org.jbpm.graph.def.Transition.take(Transition.java:151)
at org.jbpm.graph.def.Node.leave(Node.java:394)
at org.jbpm.graph.node.TaskNode.leave(TaskNode.java:209)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.graph.node.TaskNode$$EnhancerByCGLIB$$109befc6.leave(<generated>)
at org.jbpm.graph.exe.Token.signal(Token.java:195)
at org.jbpm.graph.exe.Token.signal(Token.java:166)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.graph.exe.Token$$EnhancerByCGLIB$$82e4a010.signal(<generated>)
at com.leavemanagement.TestFlow.main(TestFlow.java:28)
Caused by: org.hibernate.exception.ConstraintViolationException: could not insert: [org.jbpm.taskmgmt.exe.TaskInstance]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at org.jbpm.persistence.db.DbPersistenceService.assignId(DbPersistenceService.java:330)
... 34 more
Caused by: java.sql.SQLException: ORA-01400: cannot insert NULL into ("WORKFLOW"."JBPM_TASKINSTANCE"."ID_")
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1169)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3285)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3368)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
... 50 more
Note: i am able to end a task instance if there is only one task node.
Please suggest a solution.thanks.