Searching tasks by task variables (hibernated business objec

[harrylette]

Hi,

I am trying to figure out the right HQL for finding TaskInstances that have an hibernated business object assigned.

I know how to find TaskInstances with simple String variables assigned:

select taskinstance from TaskInstance taskinstance join taskinstance.variableInstances as variable where variable.name = :varname and variable.value =:varvalue and taskinstance.name = 'Change Provider Request' and taskinstance.isOpen = true

Now I have a businessobject called "Domain" assigned to the task and I am trying to find it like this:

select taskinstance from TaskInstance taskinstance join taskinstance.variableInstances as variable, Domain d where variable.name = :varname and d.name =:varvalue and taskinstance.name = 'Change Provider Request'

Does not work (there is no join of the Domain and the TaskInstance)... And my HQL is so bad, that I cannot figure out how to do it correctly!

Any help is greatly appreciated!

br

Harald Strack

[kukeltje]

did you try the hibernate ide to help you? it is good....

[harrylette]

Hi,

OK, I did with the Hibernate Tools. It was a pain, to install them properly (I am also using spring). But I found the query. Here it is, for interested people:

select taskinstance from Domain as dom,
 TaskInstance taskinstance,
 HibernateLongInstance as hibernatelonginstance
where
 taskinstance.name = 'Change Provider Request'
 and taskinstance.isOpen = true
 and hibernatelonginstance.id =taskinstance.variableInstances.id
 and hibernatelonginstance.name = 'domain'
 and hibernatelonginstance.value.id = dom.id
 and dom.name = :varvalue

varvalue: a domain Name (class Domain has a "name" field)

This query searches a TaskInstance that has a "Domain" object assigned.

Take care: it may only work with jbpm >= 3.1.4

The TaskInstance is created like this:

 <task-node name="Task DomBla task">
 <task name="Task DomBla" swimlane="swimlane1">
 <controller>
 <variable name="domain" access="read"></variable>
 <variable name="approve" access="read,write,required"></variable>
 </controller>
 </task>
 <transition name="" to="isApproved"></transition>
 </task-node>

This way you may also list some BusinessObjects with their assigned tasks (if you skip the last line of the query)...

When I executed the query in the hibernate console (eclipse) I got a result and eclipse was getting stuck on 100% CPU for quite a while (tested on freebsd, linux and windows). Seems to be a bug in the hibernate console - however - it is beta software.

It may help anyone who neither has a clue about HQL...

Greetings

Harry