5:15 p.m.
byungwoojun [http://community.jboss.org/people/byungwoojun] created the discussion
"Workitem handler registration declaratively?"
To view the discussion, visit: http://community.jboss.org/message/594334#594334
--------------------------------------------------------------
I learned that the service task can be defined in a configuration file (see the following
example), and added into the drools.rulebase.conf file (e.g., drools.workDefinitions =
WorkDefinitions.conf abc.conf xyz.conf). It is obivous so far. To register a workitem
handler for a service task, we use the following code:
ksession.getWorkItemManager().registerWorkItemHandler("Notification", new
NotificationWorkItemHandler());
Is there any way to register a workitem handler for a service task *declaratively* (e.g.,
using the configuration file)? Here is the reason why I ask this question. When a BPMN2
designer added a new service task and used it in a process flow, I don't want the user
needs to change Java code for its registration.
Example:
[
"name" : "Notification",
"parameters" : [
"Message" : new StringDataType(),
"From" : new StringDataType(),
"To" : new StringDataType(),
"Priority" : new StringDataType(),
],
"results" : [
"Result" : new StringDataType()
]
"displayName" : "Notification",
"icon" : "icons/notification.gif"
]
Can we define a workitem handler here? Or, any other declarative way? So, the workitem
handler can be automatically bound to the Notification Service Task without changing
code.
Thanks,
bwj
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5:29 a.m.
New subject: [jBPM] - Re: Workitem handler registration declaratively?
Mauricio Salatino [http://community.jboss.org/people/salaboy21] created the discussion
"Re: Workitem handler registration declaratively?"
To view the discussion, visit: http://community.jboss.org/message/594424#594424
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Yes, I think that you can configure the workitem handlers inside the spring configuration.
In that way you can bind all the handlers without touching the code. Take a look at the
Drools/jBPM5 spring configuration to see if it's there.. if not I will be glad to add
that :)
Greetings.
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12:15 p.m.
New subject: [jBPM] - Re: Workitem handler registration declaratively?
byungwoojun [http://community.jboss.org/people/byungwoojun] created the discussion
"Re: Workitem handler registration declaratively?"
To view the discussion, visit: http://community.jboss.org/message/594856#594856
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Thanks, Mauricio. I didn't find any decent Drools/jBPM 5 spring configuration
document, but I found a blog, saying about jBPM5, WorkItemHandler as Spring Bean,
http://community.jboss.org/thread/160352 http://community.jboss.org/thread/160352 (Michal
Minicki posted the following example). It gave me some ideas how Spring can help here. I
know Spring framwork is flexible and useful, but I have some reservations (or I am
debating) if I have to bring the Spring framework additionally to solve this issue...
e.g.,
<drools:ksession id="jpaSingleSessionCommandService"
type="stateful" kbase="knowledgeBase">
<drools:configuration>
<drools:work-item-handlers>
<drools:work-item-handler name="Notification"
ref="refToNotificationWorkItemHandler" />
</drools:work-item-handlers>
<drools:jpa-persistence>
<drools:transaction-manager ref="transactionManager" />
<drools:entity-manager-factory ref="entityManagerFactory" />
</drools:jpa-persistence>
</drools:configuration>
</drools:ksession>
Is there any jBPM solution, using some configuration files? If not, I am thinking about
creating a simple XML-format configuration file (similar to the above), and the code can
retrieve a set of service tasks (name) and workitem handlers (ref) and bind them in a
loop. Maybe I end up using Spring framework, but...
BTW, is there WorkItem configuration schema or syntax? I saw there are name, parameters,
results, displayName, icon and customEditor. Are they a complete list? What other tags I
can put? I tried to find its syntax/schema, but no luck so far.
thanks,
bwj
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12:21 p.m.
New subject: [jBPM] - Re: Workitem handler registration declaratively?
Mauricio Salatino [http://community.jboss.org/people/salaboy21] created the discussion
"Re: Workitem handler registration declaratively?"
To view the discussion, visit: http://community.jboss.org/message/594857#594857
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Hi there.. the spring configuration looks fine, that should be your solution. I'm not
a spring fan but it looks exactly what you need to solve the problem.
The properties that you are mentioning are used by eclipse to recognize a custom work item
and to include it in the palete, that's not related with the work item itself. For
each workitem that you define you will end up with the properties specific for that work
item.
Greetings!
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12:36 p.m.
New subject: [jBPM] - Re: Workitem handler registration declaratively?
byungwoojun [http://community.jboss.org/people/byungwoojun] created the discussion
"Re: Workitem handler registration declaratively?"
To view the discussion, visit: http://community.jboss.org/message/594864#594864
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Hi there.. Yes, the work item configuration is for eclipse palette. In my case, most of
service task configurations will be bound to work item handlers (I am thinking about a
generic workitem handler that can handle any kind of service tasks - parameters,
content-based logic, using java reflection, annotations). So, I briefly thought about if I
can add a customized tag (e.g., "binding" : "name of workitem handler"
) in the configuration, I can use this configuration file to extract both service task
names and workitem handlers, instead of creating multiple configuration files here and
there (or using Spring framework). However, considering decoupling between designer and
workitem handlers, it may be not a good idea.
I am still interested in finding the workitem configuration shema/syntax to see if I can
customize the schema.
thanks,
bwj
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Mauricio Salatino