Wierd Problem in Hibernate session
I have to following code:
protected TaskInstance locateTask(ContextInstance ctx, JbpmContext jbpmContext) throws ApplicationException {
String searchValue = (String) ctx.getVariable(contextKey);
if (searchValue == null || searchValue.trim().equals(""))
return null;
String query = String.format("select t.ID_ TASK_ID from JBPM_TASKINSTANCE t , JBPM_VARIABLEINSTANCE vi "
+ "where vi.STRINGVALUE_ = '%s' and vi.TOKEN_ = t.TOKEN_ and (t.ISOPEN_ = 1 or t.ISSUSPENDED_ = 1)"
+ " and t.END_ is null and t.NAME_ ", new Object[] {searchValue});
String inString;
if (!notInTaskType) {
inString = String.format("in ( %s )", new Object[] {taskName});
}
else {
// we're looking for tasks which are not of types given
inString = String.format("not in ( %s )", new Object[] {taskName});
}
query += inString;
SQLQuery sqlQuery = jbpmContext.getSession().createSQLQuery(query).addScalar("TASK_ID", Hibernate.LONG);
List result = sqlQuery.list();
// Collection<DbaseFieldList> result = JDBCHelper.getInstance().runSelectStatement(query,
// (Connection) ctx.getTransientVariable(FlowVariables.CONNECTION));
if (result == null || result.isEmpty()) {
return null;
}
// always take the first one found! usually there should be only one task in existence
// long taskId = Long.parseLong(result.iterator().next().get("ID_").getValueAsString());
Long taskId = (Long) result.get(0);
if (logger.isLoggable(Level.FINEST))
logger.finest("Found a Task with ID: " + taskId);
TaskInstance task;
try {
task = TaskManager.loadInstance(taskId, jbpmContext);
if (logger.isLoggable(Level.FINEST))
logger.finest(task.toString());
}
catch (ApplicationException ae) {
// the task is either being opened by a user of is being finished by a user.
Long userId = (Long) ctx.getTransientVariable(FlowVariables.USER_ID);
if (userId != null) {
String folderId = (String) ctx.getVariable(FlowVariables.FOLDER_ID);
String text = ServerSideResources.translate("Msg38") + " " + folderId;
Set<String> users = new HashSet<String>();
users.add(userId.toString());
MessageManager.getInstance().sendMessageToUsers(users, text);
}
return null;
}
return task;
}
public static EmiTaskInstance loadInstance(long taskId, JbpmContext ctx) throws ApplicationException {
EmiTaskMgmntSession mgmtSession = (EmiTaskMgmntSession) ctx.getTaskMgmtSession();
try {
return (EmiTaskInstance) mgmtSession.loadTaskInstance(taskId);
}
catch (JbpmException e) {
throw new ApplicationException("ALREADY_ASSIGNED", e.getMessage());
}
}
In one process I call a subprocess. Before the subprocess is called I run an action which closes a Task (Hence Task A). At the beginning of the subprocess I run an action which runs the locateTask from above to locate open tasks that have a certain value. The select I run using the open hibernate session returns finding Task A although Task A is closed i.e has an end date, and is not marked as open or suspended. More over, on the next couple of lines of code I load the task with the id the select returned and try to resume it, this fails on exception that says I can't resume a task that has been closed. How can the select find this task if it closed?
I'm running a Jbpm 3.2 in a clustered environment, which means I'm using an XA DataSource and XA transactions. A Transaction is opened before I begin and the commit is only after The subprocess has reached a blocking state.
The only thing I can think of is that for some reason the connection used for the query is not the connection used for loading and closing the task. I also want to mention that the same exact code does not fail in a non clusterd environment.
I'll be happy to read any thoughts on this matter that can point me to a direction....
