8:29 a.m.
jnorris [https://community.jboss.org/people/jnorris] created the discussion
"Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755792#755792
--------------------------------------------------------------
Hi All,
Is there a way to get the active tasks for a process instance? Can this information be
retrieved from the node instances for a WorkflowProcessInstance? I don't see the
correlation between the HumanTaskNodeInstance/HumanTaskNode and a Task unless the getId
method returns the task id which is not clear from the javadocs and is likely the id from
the nodeinstancelog table.
Thanks,
Jim
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755792#755792]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
8:43 a.m.
New subject: [jBPM] - Re: Active tasks for process instance
jnorris [https://community.jboss.org/people/jnorris] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755799#755799
--------------------------------------------------------------
Here's what I'm thinking might work:
Get the list of NodeInstances for the process instance
For each node that is a HumanTaskNodeInstance get the workitemid for the node
Get the task using localTaskService.getTaskByWorkItemId(workitemid)
Jim
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755799#755799]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
8:56 a.m.
New subject: [jBPM] - Re: Active tasks for process instance
Esteban Aliverti [https://community.jboss.org/people/eaa] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755805#755805
--------------------------------------------------------------
The best way to get this information is to use jbpm-bam module (basically it logs all the
activities of your processes into a db) and to query NodeInstanceLog table.
This is a query you can use:
SELECT
n
FROM
NodeInstanceLog n
WHERE
n.processInstanceId = :processInstanceId and
n.nodeName != ''
GROUP BY n.nodeName
HAVING MOD(COUNT(n), 2) = 1
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755805#755805]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
9:36 a.m.
New subject: [jBPM] - Re: Active tasks for process instance
jnorris [https://community.jboss.org/people/jnorris] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755821#755821
--------------------------------------------------------------
Hi Esteban,
We are using persistence and logging activity to the DB. We are trying to avoid directly
querying the DB and sticking to using the API methods. Also from the query you suggest I
don't see how that gives me the list active Tasks for the process instance which is
what the use case I'm trying to implement requires.
Regards,
Jim
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755821#755821]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
9:54 a.m.
New subject: [jBPM] - Re: Active tasks for process instance
Esteban Aliverti [https://community.jboss.org/people/eaa] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755825#755825
--------------------------------------------------------------
AFAIK, there is no API to query history log.
jbpm-bam module inserts a row in NodeInstanceLog each time a node is entered and a
different row each time a node is exited. What the query does is to check for odd
occurences of a node (using its name) in NodeInstanceLog.
So, if the node is entered but not exited yet, you will have 1 row in NodeInstanceLog
table for a particular process instance id and a particular node (assuming the names of
your tasks are unique in a process). When the task is exited, a new row is inserted so the
total number of rows for that particual node is even (not returned by the query). If it
happens that the node is entered again (some kind of recursion in your process), then the
row count will be odd again (3).
Best Regards,
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755825#755825]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
10:23 a.m.
New subject: [jBPM] - Re: Active tasks for process instance
jnorris [https://community.jboss.org/people/jnorris] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755835#755835
--------------------------------------------------------------
Hi Esteban,
I implemented code which appears to work for a simple test case:
List<Task> activeTasks = new ArrayList<Task>();
StatefulKnowledgeSession ksession = createKnowledgeSession();
org.jbpm.task.TaskService localTaskService = this.getTaskService();
JPAWorkingMemoryDbLogger jpaLogger = new JPAWorkingMemoryDbLogger( ksession );
KnowledgeRuntimeLoggerFactory.newConsoleLogger( ksession );
WorkflowProcessInstance processInstance = (WorkflowProcessInstance)
ksession.getProcessInstance( piId );
Collection<NodeInstance> nodes = processInstance.getNodeInstances();
Task jbpmTask;
for ( NodeInstance nodeInstance : nodes )
{
if( nodeInstance instanceof HumanTaskNodeInstance )
{
jbpmTask = localTaskService.getTaskByWorkItemId( ((HumanTaskNodeInstance)
nodeInstance ).getWorkItemId() );
activeTasks.add( bpmTask );
}
}
Regards,
Jim
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755835#755835]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
12:20 p.m.
New subject: [jBPM] - Re: Active tasks for process instance
Demian Calcaprina [https://community.jboss.org/people/calca] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755859#755859
--------------------------------------------------------------
You can also query the task service, something like
String query = select t from Task twhere t.taskData.status = org.jbpm.task.Status.Reserved
and t.taskData.processInstanceId = <<pid>>
localtaskservice.query(query,...)
Regards,
Demian
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755859#755859]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
12:23 p.m.
New subject: [jBPM] - Re: Active tasks for process instance
jnorris [https://community.jboss.org/people/jnorris] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755860#755860
--------------------------------------------------------------
Hi Demian,
Isn't the query method deprecated? Is there another way to execute a custom query?
Regards,
Jim
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755860#755860]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
3:58 a.m.
New subject: [jBPM] - Re: Active tasks for process instance
Christian Witschel [https://community.jboss.org/people/cwitschel] created the discussion
"Re: Active tasks for process instance"
To view the discussion, visit: https://community.jboss.org/message/755922#755922
--------------------------------------------------------------
Hi,
it must be possible. in the jbpm-console when you click the diagram button on a running
process, it points to the current task.
cheers
christian
--------------------------------------------------------------
Reply to this message by going to Community
[https://community.jboss.org/message/755922#755922]
Start a new discussion in jBPM at Community
[https://community.jboss.org/choose-container!input.jspa?contentType=1&...]
4977
days inactive
4978
days old
8 comments
4 participants
participants (4)
-
Christian Witschel -
Demian Calcaprina
-
Esteban Aliverti
-
jnorris