com.googlecode.sarasvati.event
Interface ExecutionListener

All Known Implementing Classes:

DefaultExecutionEventQueue.RegisteredExecutionListener, ExecutionListenerWrapper, GraphDefinedEventListenerInvoker, ProcessDefinedEventListenerInvoker, TokenSetCompletionListener

public interface ExecutionListener

Listeners may be registered for events happening on a single GraphProcess or all processes. Listeners may in some cases influence how execution proceeds by returning an EventActions object. Listeners may be stored a database by classname. They should therefore have a public default (no-args) constructor.

Author:

Paul Lorenz

See Also:

Engine.addExecutionListener(Class, ExecutionEventType...), Engine.addExecutionListener(GraphProcess, Class, ExecutionEventType...), EventActionType

Method Summary

EventActions

notify(ExecutionEvent event) Invoked by the Engine when an event of a type that this listener has register for occurs.

Method Detail

notify

EventActions notify(ExecutionEvent event)

Invoked by the Engine when an event of a type that this listener has register for occurs. May return an EventActions defining the actions to be performed or null.

Parameters:

event - The event which has just occurred.

Returns:

EventActions The set of requested EventActionTypes or null.