01: /*
02: * $Id: Event.java 881 2007-02-12 07:54:31Z hengels $
03: * (c) Copyright 2004 con:cern development team.
04: *
05: * This file is part of con:cern (http://concern.sf.net).
06: *
07: * con:cern is free software; you can redistribute it and/or modify
08: * it under the terms of the GNU Lesser General Public License
09: * as published by the Free Software Foundation; either version 2.1
10: * of the License, or (at your option) any later version.
11: *
12: * Please see COPYING for the complete licence.
13: */
14: package org.concern.controller;
15:
16: /**
17: * An Event is basically an asynchronous without a precondition.
18: * Timers are a common usage of events.
19: */
20: public interface Event<S> extends Node {
21: String getPostcondition();
22:
23: /**
24: * This method is called by the controller when the event ocured.
25: * @param subject the subject
26: * @throws ActivityExecutionException
27: */
28: void occured(S subject) throws ActivityExecutionException;
29: }
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