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Override Code

sp2

I want to override setAssignee method of activiti/alfersco workflow.How Can I do that?

I found that TaskEntity.java class is called during set assignee.

Is this proper way to change existing setAssignee below method of TaskEntity.java?

public void setAssignee(String assignee, boolean dispatchAssignmentEvent, boolean dispatchUpdateEvent) {}

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Comments

afaust

Why do you want to change / override that method in the first place? Generally speaking it is not recommend / actually discouraged to make changes to the core classes / sources just to addess a business requirement. If you need some different behaviour from task assignment, you should implement a proper API facade / action wrapper around the things you need to adapt.

sp2

How Can I Implement API facade / action wrapper for setAssignee()?

Can you provide some help on that?

afaust

I don't want to sound rude, but the facade pattern is a common software design pattern. Any help I would provide would basically just be a TL;DR summary of that pattern at this point...

sp2

can you provide some more detail?

abbask01

why not use taskListener instead? write your business logic on "assign" event then send the variable to the setAssignee

sp2

This is not for particular workflow.it is for all workflow.

can you describe how can i achieve?

abbask01

you can a listener before every task assignment. This thread might help you - Does engine have a hook to install an event listener?

update: use AbstractBpmnParseHandler instead of AbstractBpmnParseListener (with 5.22 engine)

example:

public class AssingmentExample extends AbstractBpmnParseHandler<UserTask> {
   @Override
   protected void executeParse(BpmnParse arg0, UserTask userTask) {
        // add your custom logic here
       userTask.setAssignee("// your assignee here");
   }
   @Override
   protected Class<? extends BaseElement> getHandledType() {
       // TODO Auto-generated method stub
       return null;
   }
}