You have to do it in the XML. There is no GUI component for the sub process.
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jBPM can do what you are talking about.
You could :
1. have multiple processes definitions that map your functionality
2. have one process that has multiple transitions and pass a context variable
around to indicate which path to take
3. have the nodes actually route themselves to different place
Have you looked at the BERND.SYS_C00581420 constraint to see specifically what
it is? is it trying to put the same row in twice?
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Also... be careful with your transactions. Objects are (generally) tied to the
hibernate sesion they came from. Always keep that in mind when dealing with the
session and objects. If you open two sessions, you could have objects bound to
the wrong session. Or if you close a session, fiddle with
What version of jBPM are you running? I am using 3.0 and I've never seen that
error and I've been testing the h3ll out of it.
Sean
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This helps you create a process definition and test it.
Are you asking how to deploy the process definition into the database? That
would deploying the par file.
I'm not sure if the GPD comes with a build.xml so you can do it with ant. I've
got one, but it's been so long, I'm not sure if I ma
I am running jBPM inside Jetty. It is a lightweight webserver that allows me to
issue URL commands to do stuff against jBPM.
I have methods such as:
startProcess
signalToken
pauseProcess
restartTokenNode
endProcess
We can then deploy as many Jetty instances as we want. We then register each IP
Hmmm. maybe. I was unable to get the subprocess to work for me in 3.0, so I
can't be positive.
I imagine the scenario like this:
VM1: mainprocess
---> calls subprocess (through RMI/etc) on VM2
VM2: subprocess
---> ends and signals main token to continue
---> the main token will now continue on
I've been deep in the code of jBPM over the last week. I've written my own
persistent node, fork node, join node, and sub process node.
I always hate it when my questions go unanswered, so if I can help out, I do.
Sean
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I would think you want the def in the database. I assume you will want to
historically track your transactions back to the definition. If you create it
on the fly, you will never know for sure what the process was at that time.
Plus you run the risk of your def being changed and the problem not
Is there any unique id associated with instance of processdefinition?
which you can use to fetch a particular process later..
> yes, look at the jbpm_processinstance table
How do you track a particular process to find out its state etc..?
> The transaction is maintained outside the jBPM engine. ie
I could see the ProcessInstance.end() method was adjusted from 3.0 to 3.1alpha
(so something wasn't likely right), and I didn't want to upgrade to 3.1 yet...
I needed persistance, so I just wrote my own ProcessState as a node extension.
It was pretty easy. Essentially the two things needed done:
Hmmm... I am using 3.0 (not the alpha).
I get this error when trying to get to the sub process:
| java.lang.NullPointerException: can't create a process instance when
processDefinition is null
| at org.jbpm.graph.exe.ProcessInstance.(ProcessInstance.java:60)
| at org.jbpm.graph.nod
When does a sub process return to the main process?
Example: a sub process goes into a wait state. Its token is triggered later.
Does it bring the parent token back to life and the parent continues where it
left off? I don't see anything in the end state that would indicate this would
occur.
I
There will never be a situation where I will span multiple nodes without saving
state.
To me, each node is a step in a job. In that light, it is critical to know
exactly where the process is so that work is not done twice in case of a power
/ machine failure. The first node might pick up a file
Also, leaveNode is not probably what you want.
I think the documentation is not clear on your real options are.
You essentially have two types of nodes: ones that automatically transition
(fork,join) and ones that do not (state).
It is very important to know what each node does. If you signal
I do indeed have my own process monitor, which is essentially a more fancy
query than I provided here.
I have added several context variables to allow me to add detailed state
information to a process, such as ERROR, PAUSED, INACTIVE, ACTIVE, PAUSING,
COMPLETED. I am able to see the status of e
I agree with Rainer.
jBPM is just a workflow engine. It does not prioritize the execution/speed of
tasks.
This would be something you would do outside jBPM.
My first job was a mainframe job (s!). When you submited work to the
mainframe/CPU, you submitted a list of things you want to perfo
Is there a way to register external events for jbpm, such that they cause a
"state transition"?
jBPM is a workflow engine. It isn't designed to listen for events and react to
them. That is up to the developer.
You could slice this two ways:
1. write an action that looks for the file and sign
"I am just not able to see that transition from one state to next state"
How are you looking for it? Are you querying the database?
You can use the query below to check the status of non-completed processes:
> This will show one row for each instance + token + context variable
Keep in mind that
I've never considered having a join bring together two forks. I'm not sure it
was intended to do that. It would be easy enough to try it out.
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Very nice. You'll only find NodePersist in dark alleys alongside stolen
watches.
I'm actually very happy with it along with ForkAsync and JoinAsync. I can run a
query and know exactly what nodes a process is in. The query returns one row
for each token with its status and restart info if it fa
Me leave? Nah. I'm like a bad penny.
You don't even want to see my NodePersist class. That breaks all the rules ;-)
Ltr
Sean
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State is saved in the database, so you should be fine in a cluster. I would not
allow a single process instance to run across clusters (which could
theortically happen in a fork).
Someone else can answer the timer question. I believe timers
(SchedulerThread.java?) are implemented using threads,
jBPM isn't a jBoss solution. It should work outside the context of a J2EE
engine. How are you going to provide a BAM solution automatically if it doesn't
save state for you...
I think we will agree to disagree. I am going to create my ForkAsync and be
done...
Sean
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I think there are two uses of jBPM.
The traditional use is a long transaction where multiple nodes occur within one
transaction. I see the validity of this, but this isn't the only use for jBPM.
The second use for jBPM is to save state when each node is complete. Yes, this
means the node is do
I expected a "spanking" for doing that, but I need updated state info and it
did the trick.
I did isolate it so that the referenced tokens are in their own hibernate
session and closed the session afterwords. Nothing is broken in this case. I
need the state refreshed in the join and since I am
OK, here is the JoinAsync class. Instead of using a join when you have
asychronous logic going on, use a standard node that calls this in its action
and asynchronous logic should work.
Yes, it is a bit of a hack because it essentially reloads the parentToken for
analysis and then throws it away
First, let me say that I am going to create a new fork and join node that works
asynch. I was going to just create a new fork node, but after discussing the
issue with my coworkers, we are going to add a new join that is aware of asynch
tokens. This is the most elegant solution to this problem.
Alejandro : When you say "lock the process instance", are you saying:
hibernateSession = jbpmSession.getSession;
jbpmObject = lookupJbpmObjectYouWantToWorkOn(...);
hibernateSession.lock(jbpmObject , LockMode.UPGRADE);
I found this in discussion thread:
http://www.jboss.com/?module=bb&op=viewtopic
Here is the original process def:
http://static.flickr.com/20/71523252_c5116f6d9a.jpg?v=0
Here is the new process def:
http://static.flickr.com/20/71779978_7df2acc810.jpg?v=0
parallel1 and parallel2 are designed to go into wait states. I then signal
their respective tokens which causes parallel1
I was able to come up with a workaround hack.
I added a state to each forked branch just prior to the join. This state fires
off a thread that sleeps for 10 seconds, allowing the current thread to go into
a wait state and then resignals the token for the waiting branch. This causes
the the lat
If I try to close the JbpmSession and create a new one in the middle of a
process running, it pukes (as expected):
ERROR 1208:1345 zationException : failed to lazily initialize a
collection of role: org.jbpm.graph.exe.Token.children - no session or session
was closed
org.hiberna
Once a process instance gets into this situation, it is interesting to try to
complete it. Both tokens are now stting at the join.
I have learned from experience that signaling a join, fork, start, or end cause
bad things to happen... If I signal either token, the process instance follows
to c
"The default behaviour of a join is as you describe it, wait for all tokens to
arrive."
This is true, but if you are running the tokens in different threads the join
doesn't know about the state from each thread.
To make it clearer, think of it this way: each thread is running in a different
V
OK, the image didn't work and I thought I read my post thru, but I made an
important typo:
the join is NOT allowing processing thru when the parallel processing occurs in
different threads.
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I was afraid this was going to happen, but it took me all morning to create the
test case.
Here is the scenario:
[img]http://static.flickr.com/20/71523252_c5116f6d9a.jpg?v=0[/img]
If I cause both parallel1 and parallel2 to not signal and signal their
respective tokens later asynchronously, the
I noticed this happened when I did it manually.
I get versions when I deploy it using the ant script task "deploy_par"
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I use this to clean up my development database of all process instances.
begin work;
delete from jbpm_comment;
delete from jbpm_variableinstance;
delete from jbpm_tokenvariablemap;
delete from jbpm_moduleinstance;
delete from jbpm_log;
delete from jbpm_token;
delete from jbpm_processinstance;
comm
I never seem to be able to connect to that damn sorceforge cvs (g!), so I
may be duplicating work here. I have the alpha and don't see anything besides a
stubbed out class called "ParallelSplit.java".
After digging into the problem, it seems to me that a new class called
ForkAsync could do
As an outsider using jBPM and trying to get it ready for production to run our
batch processes, it has been throwing me some curve balls.
Don't get me wrong here, I like jBPM and picked it from a field of other BPM
systems (osworkflow, wfmopen, shark, openwfe, etc...)
I do look at stuff with a
I am also confused by the use of the term "concurrent" with the fork and join.
Concurrent means "occurring or operating at the same time", which is not the
case here. Having to manually enhance jBPM to get it to run concurrent
processes asynchronously seems odd. I would think this would be the d
Um... that XML wasn't very happy in this post... sorry about that (should have
do a preview)
Let me try again...
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It appears from the FAQ that forks are not asychronous (scratches head). I am a
bit baffled by this. Worse, my fork is not running running both branches.
I am not running in a managed environment, such as jBoss, so sending messages
around isn't going to work (I believe), and doing work outside t
Thanks for your quick reply. I will think about it over the weekend.
I am running jBPM inside jetty (jPBM called by quartz, other processes via URL)
to keep it lightweight. I have a base class for all my nodes, so I will figure
out how to weave it together.
Thanks,
Sean
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I would like jBPM to save its state in the database as anything changes (new
node entered/left/etc). I've tried turning on autocommit both in hibernate and
in the code by getting the connection and turning autocommit on, but it doesn't
seem to work.
The persistence doc does explain how to resol
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