Killing a sub process from it's parent process

Question

does any one know if ther's a way of killing a sub process from it's parent process?

Answer 1

There are a few ways to do this depending on how the subprocess was invoked and if you are inside the parent work item instance or if you are using PAPI.
If you are not using PAPI, here's how you could abort the child work item instances spawned by a parent process's work item instance.
Asynchronously Spawned Children
If a child process was invoked using an asynchronous Process Creation activity, the work item instance in the parent has a predefined hash table variable called "children". Downstream of the parent's Process Creation activity (called "SpawnChildren" in the PBL logic below), you can get the child's instance id using the children hash table and use this to send a notification to a Message Wait activty in the spawned child process instance using logic like this:
send Notification
        using instanceId = children["SpawnChildren"],
              activityName = "TerminateChild",
              parameters = nullThe Message Wait activity needs to have its "Allows Interrupt" property checked in the child process. As you add this Message Wait activity (called "terminateChild" in the example above) make it an orphan with no transitions in or out initially. Once notified by the parent process, it still needs to be aborted so add a new Automatic activity in the child with this logic:
action = ABORTFinally, add a transition from the Message Wait activity in the child subprocess to the Automatic activity.
Synchronously Spawned Children
If all you know is the parent work item instance's id and the child subprocess was invoked using a synchronous SubFlow activity, you could send a notification to a Message Wait activity that has it's "Allows Interrupt" property checked in the parent. If the Message Wait activity flows to an Automatic activity, you could use logic like this to kill the child subprocess work item instances synchrously spawned by the parent:
for each ch in ProcessInstance.children do
    send Notification
        using instanceId = ch,
              activityName = "TerminateChild",
              parameters = null
end
action = SKIPSince the parent's instance was stuck in the Subflow activity, you'd need to send a notification to the parent's Message Wait activity in the parent process.