01: /*
02: * Copyright (c) 2001 by Matt Welsh and The Regents of the University of
03: * California. All rights reserved.
04: *
05: * Permission to use, copy, modify, and distribute this software and its
06: * documentation for any purpose, without fee, and without written agreement is
07: * hereby granted, provided that the above copyright notice and the following
08: * two paragraphs appear in all copies of this software.
09: *
10: * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
11: * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
12: * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
13: * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
14: *
15: * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17: * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
18: * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
19: * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
20: *
21: * Author: Matt Welsh <mdw@cs.berkeley.edu>
22: *
23: */
24:
25: package seda.sandStorm.api;
26:
27: /**
28: * This class defines an interface for delivery of systemwide 'signals',
29: * informational events that stages may wish to use for initialization
30: * or control.
31: *
32: * @see SignalIF
33: * @author Matt Welsh
34: */
35: public interface SignalMgrIF {
36:
37: /**
38: * Register for the given signal type. When the signal is triggered,
39: * an object of the given type (although not necessarily the same
40: * object instance) will be delivered to the given SinkIF.
41: */
42: public void register(SignalIF signalType, SinkIF sink);
43:
44: /**
45: * Deregister for the given signal type.
46: */
47: public void deregister(SignalIF signalType, SinkIF sink);
48:
49: }
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