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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!

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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

<br>public class SetLocalVariableTask implements JavaDelegate {<br><br> public void execute(DelegateExecution execution) throws Exception {<br>&nbsp;&nbsp; execution.setVariableLocal("testLocal", "test2");<br>&nbsp;&nbsp;&nbsp; execution.setVariable("test", "test2");<br>&nbsp; }<br><br>}<br>

2. Read variable from execution.

3. Use DbSession or activiti queries.

Regards
Martin