Esteban Aliverti [
http://community.jboss.org/people/eaa] created the discussion
"Re: registerWorkItemHandler workItemName"
To view the discussion, visit:
http://community.jboss.org/message/622080#622080
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It seems that if you want to usa a then you need to define the interface of your service
in the process definition. The interface defines an operation and then you can use that
operation in your node. Here is an example:
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/resour...
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/test/resour...
This is a generic way to invoke services, but I'm not sure if it is the best. If you
use a then you need to register a generic "ServiceTaskHandler" to it. Because
it is generic, you can attach the same handler to all your nodes. The ServiceTaskHandler
class is a WorkItemHandler that will take the parameters defined in the your references,
instantiate a new class (the one defined in 's 'name' attribute) using
reflection, and finally it will try to invoke the method defined by the element. For
simple scenarios, this could be enough, but for more complex situations, I think a plain
node with a custom WorkItemHandler is much better. Here is the implementation of
ServiceTaskHandler:
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/main/java/o...
https://github.com/droolsjbpm/jbpm/blob/master/jbpm-bpmn2/src/main/java/o...
Because node has this 'generic' behavior, I'm not sure if you can attach
different Handlers to different node instances. Again, I think a node is much better.
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