How can I skip Tasks with variables as filter criteria

Flowable Engine
1

I have use case where there are some serviceTasks. Each service task contains some variables like inputParam, outputParam. Now I want to skip serviceTasks for some set of inputParams. For that, I want to store the inputParam as list globally for process and check for serviceTask whether inputParam is in the list or not.

Sample BPMN is like this:

<?xml version="1.0" encoding="UTF-8"?>

      //some logic to store set of inputParams which can be accessed by all service tasks. Not sure about this logic
      <flowable:field name="inputFilterList">
               <flowable:string>{"inputParam1"}</flowable:string>
      </flowable:field>

      <serviceTask id="INPUT_REFRESH_PARAM1" name="Task execute 1" skipExpression="${//expression to check if testInputParam1 is in inputFilterList//}" flowable:async="true" flowable:triggerable="true" flowable:class="RefreshTaskDelegate">
         <extensionElements>
            <flowable:field name="inputParam">
               <flowable:string>["testInputParam1"]</flowable:string>
            </flowable:field>
            <flowable:field name="outputParam">
               <flowable:string>["testOutputParam1"]</flowable:string>
            </flowable:field>
         </extensionElements>
      </serviceTask>
      <serviceTask id="INPUT_REFRESH_PARAM2" name="Task execute 2" flowable:async="true" flowable:triggerable="true" flowable:class="RefreshTaskDelegate">
         <extensionElements>
            <flowable:field name="inputParam">
               <flowable:string>["testInputParam2"]</flowable:string>
            </flowable:field>
            <flowable:field name="outputParam">
               <flowable:string>["testOutputParam2"]</flowable:string>
            </flowable:field>
         </extensionElements>
      </serviceTask>

How can I achieve this functionality?

2

Hallo @JimMoriarty
you want to check for conditions and decicde if your task should executed or not?
You can check out this link
Conditional sequence flow and this Gateways

Greetings

Christopher

3

Thanks @WelschChristopher.
Can you also tell me how I can set my own variables at process level, so that those can be accessed across all tasks?

4

If you use execution.setVariable(name, value), the variables will be process instance scoped by defaul.

5

Thanks @joram
I set _FLOWABLE_SKIP_EXPRESSION_ENABLED to true like this.
variableMap.put("_FLOWABLE_SKIP_EXPRESSION_ENABLED", true) startProcessInstanceById(processDefinitionId, businessKey, variableMap)
In my BPMN file I have flowable:skipExpression="${1==1}" (kept this for testing purpose). Even now, the task is being executed instead of skipping. Did I miss something?

PS: I verified whether it is set before starting the execution or not. It is set.