Passing work items between service tasks

[gouthr]

Hi,

How does the Activiti engine pass the work items from one service task to the next? Let me explain with an example:

Say, I have a service task which invokes a java class. The java class does some processing and generates some values (work items). Now I need to be able to pass these work items to the next service task in the workflow - this in turn does some more processing on the received input and generates a new set of values (work items) which needs to be passed on to the next service task in the workflow chain. How do i do that?

Thanks!

[gouthr]

Similarly how do i read the input for the first service task? Currently I am running some sample JUNIT tests and I am hard-coding the input values. If I were to take the input from the user, how would I do it? Is it from a FormService?

[gouthr]

A follow up question. How can I use the default H2 database to (create a new table and )write and read new values from it? Any pointers to sample code or documentation would be great.

[martin_grofcik]

Hi Goutham

1. Your custom logic implements JavaDelegate interface. Use execution to set variables (local or global) in the process instance

public class SetLocalVariableTask implements JavaDelegate {

public void execute(DelegateExecution execution) throws Exception {
   execution.setVariableLocal("testLocal", "test2");
    execution.setVariable("test", "test2");
  }

}

2. Read variable from execution.

3. Use DbSession or activiti queries.

Regards
Martin