Hi,
i m developping a web application based on this example.
In order to make my application storing already-started/unfinished processes/sessions and being able to retrieve them later(which is an avantage of the jbpm framework..); i want that these processes to be persisted on the database and not to be erased and replaced by a new data when a new record is persisted ,so , it is clear that the problem is about the property "hibernate.hbm2ddl.auto" on the persistance.xml's persistance-unit configuration.. but i actually have a problem to do this. My persistance.xml looks like this :
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence version="1.0" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" xmlns:orm="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="org.jbpm.persistence.jpa" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:comp/env/jdbc/testDS1</jta-data-source>
<class>org.drools.persistence.info.SessionInfo</class>
<class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>
<class>org.jbpm.persistence.processinstance.ProcessInstanceEventInfo</class>
<class>org.drools.persistence.info.WorkItemInfo</class>
<class>org.jbpm.process.audit.ProcessInstanceLog</class>
<class>org.jbpm.process.audit.NodeInstanceLog</class>
<class>org.jbpm.process.audit.VariableInstanceLog</class>
<class>org.jbpm.task.Task</class>
<class>org.jbpm.task.Comment</class>
<class>org.jbpm.task.Attachment</class>
<class>org.jbpm.task.I18NText</class>
<class>org.jbpm.task.SubTasksStrategy</class>
<class>org.jbpm.task.Deadline</class>
<class>org.jbpm.task.Escalation</class>
<class>org.jbpm.task.Reassignment</class>
<class>org.jbpm.task.Notification</class>
<class>org.jbpm.task.BooleanExpression</class>
<class>org.jbpm.task.User</class>
<class>org.jbpm.task.PeopleAssignments</class>
<properties>
<!-- mysql dialect -->
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.autocommit" value="false"/>
<property name="hibernate.max_fetch_depth" value="3"/>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup"/>
</properties>
</persistence-unit>
<persistence-unit name="org.jbpm.task">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>org.jbpm.task.Attachment</class>
<class>org.jbpm.task.Content</class>
<class>org.jbpm.task.BooleanExpression</class>
<class>org.jbpm.task.Comment</class>
<class>org.jbpm.task.Deadline</class>
<class>org.jbpm.task.Comment</class>
<class>org.jbpm.task.Deadline</class>
<class>org.jbpm.task.Delegation</class>
<class>org.jbpm.task.Escalation</class>
<class>org.jbpm.task.Group</class>
<class>org.jbpm.task.I18NText</class>
<class>org.jbpm.task.Notification</class>
<class>org.jbpm.task.EmailNotification</class>
<class>org.jbpm.task.EmailNotificationHeader</class>
<class>org.jbpm.task.PeopleAssignments</class>
<class>org.jbpm.task.Reassignment</class>
<class>org.jbpm.task.Status</class>
<class>org.jbpm.task.Task</class>
<class>org.jbpm.task.TaskData</class>
<class>org.jbpm.task.SubTasksStrategy</class>
<class>org.jbpm.task.OnParentAbortAllSubTasksEndStrategy</class>
<class>org.jbpm.task.OnAllSubTasksEndParentEndStrategy</class>
<class>org.jbpm.task.User</class>
<class>org.drools.persistence.info.SessionInfo</class>
<class>org.jbpm.persistence.processinstance.ProcessInstanceInfo</class>
<class>org.jbpm.persistence.processinstance.ProcessInstanceEventInfo</class>
<class>org.drools.persistence.info.WorkItemInfo</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/jbpm5webexpl" />
<property name="hibernate.connection.username" value="root"/>
<property name="hibernate.connection.password" value="sdfsdf"/>
<property name="hibernate.connection.autocommit" value="false" />
<property name="hibernate.max_fetch_depth" value="3"/>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.show_sql" value="false" />
</properties>
</persistence-unit>
</persistence>
while initiating a servlet which is responsible for the starting of the human-task service, users must be added :
public class HumanTaskStartupServlet extends HttpServlet {
private static Log log = LogFactory.getLog(HumanTaskStartupServlet.class);
public void init() throws ServletException {
super.init();
try {
EntityManagerFactory emfTask = Persistence.createEntityManagerFactory( "org.jbpm.task" );
TaskService taskService = new TaskService(emfTask, SystemEventListenerFactory.getSystemEventListener());
/*
* Add the required users
*/
TaskServiceSession taskSession = taskService.createSession();
try {
taskSession.addUser(new User("Administrator"));
taskSession.addUser(new User("krisv"));
taskSession.addUser(new User("john"));
taskSession.addUser(new User("mary"));
} catch (Exception e) {
e.printStackTrace();
}
/* Start Mina server for HT*/
MinaTaskServer server = new MinaTaskServer(taskService);
Thread thread = new Thread(server);
thread.start();
log.debug("Mina Server started ...");
} catch (Throwable t) {
log.error(t.getMessage(), t.getCause());
throw new RuntimeException("can't start Mina server",t);
}
}
At the beginning, the property "hibernate.hbm2ddl.auto"was set to "create" so always only one record remain on the database when i changed it to "update"
i got this ERROR :
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:365)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137)
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:54)
at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:716)
at org.jbpm.task.service.TaskServiceSession.persistInTransaction(TaskServiceSession.java:682)
at org.jbpm.task.service.TaskServiceSession.addUser(TaskServiceSession.java:69)
at com.sample.taskserver.HumanTaskStartupServlet.init(HumanTaskStartupServlet.java:73)
at javax.servlet.GenericServlet.init(GenericServlet.java:160)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5027)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:963)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1600)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.BatchUpdateException: Duplicate entry 'Administrator' for key 'PRIMARY'
at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:2020)
at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1451)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
... 30 more
and unfortunatelly it should be a fatal error as the application coudn't continue : i also got this ERROR:
2012-12-26 01:45:33,559 (TaskProcessServlet.java:81) ERROR com.sample.processserver.TaskProcessServlet - Could not connect task client
i need your help for this issue, CHEERS !