find a process instance

[tbee]

I'm a bit confused; the documentation has an example on how to set context variables. In the part where it updates some variables, it takes the following steps:
- findLatestProcessDefinition
- findProcessInstances using the ProcessDefinition's id
- get(0) because in the unit test there can only be one

Now, I find it strange that it is just assumed that a process instance is based on the LATEST process definition. Normally I have a process instance id and have no idea if a newer version of the definition has been uploaded, so I cannot make that assumption.

How do I retrieve the process instance based on just the id? I can probably query the tables, find the definition id from the jbpm_procesinstance table and from there continue, but I assume there must be an API for this.

[tbee]

Hm. I found this tread about an API and it appears the current API is not mature.

http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160822#4160822

I'm pleased to see that this is already being focused on. However, my question still is valid; I assume it is not valid to always use the latest version of a description, so how do I get to an instance with just using the id? Get a connection from hibernate and use the tables directly?

[salaboy21]

The page that you mention talk about the new Public API's for jBPM.
If you want to look for processInstances by ID you should use the next method:

 JbpmContext.getProcessInstance(long processInstanceId)
 gets a process instance from the db.

Look in the official documentation: http://docs.jboss.org/jbpm/v3/javadoc/org/jbpm/JbpmContext.html

[tbee]

"salaboy21" wrote:
The page that you mention talk about the new Public API's for jBPM.

I do not think so; I'm using the 3.2 documentation.

http://docs.jboss.com/jbpm/v3.2/userguide/html_single/#databaseexample

But your method seems to be the one I'm looking for. Thanks!

[salaboy21]

You mention this forum that is part of JBoss jBPM Design, that is why there metion the maturity of the code.. because is in development...

http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160822#4160822