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Process Execution
Chapter 6 Managing Process Execution 171
ACTIVE State Handling The engine performs any work specified in the
OnActive method (if one exists in the process definition).
An active subprocess activity is handled differently depending on whether the
subprocess activity is synchronous or asynchronous.
• Synchronous—waits for completion of the new process:
If the subprocess activity is synchronous and if the new process is successfully
created, the subprocess activity remains in an ACTIVE state (in the parent
process), awaiting completion of the subprocess. If the subprocess fails to
complete for any reason, the subprocess activity is placed in an ABORTED
state.
• Asynchronous—does not wait for completion of the new process:
If the subprocess activity is asynchronous and if the new process is successfully
created, the subprocess activity is placed in a COMPLETED state (in the parent
process). If the subprocess is not successfully created, the subprocess activity is
placed in an ABORTED state.
Automatic Activities
Transition to READY State When the trigger conditions are met, the engine
performs any work specified in the Ready method (if one exists in the process
definition) and places the activity in a READY state.
READY State Handling An automatic activity passes directly from a READY to
an ACTIVE state without being assigned to sessions.
Transition to ACTIVE State In the case of an automatic activity, the engine
places the activity directly in an ACTIVE state from a READY state without
assigning it to sessions because the work of the activity is invoked or performed by
the engine rather than by a client application.
ACTIVE State Handling The engine performs the automatic activity’s OnActive
method when the activity is placed in an ACTIVE state. The work performed by
the activity is invoked or coded in the OnActive method within the process
definition. When the OnActive method is fully executed and returns TRUE, the
activity is placed in a COMPLETED state.
Activity Termination
Activity termination occurs when the engine places an activity in either a
COMPLETED state or an ABORTED state.