01: /*
02: $Id: Janitor.java 1082 2004-04-19 07:29:47Z cpoirier $
03:
04: Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
05:
06: Redistribution and use of this software and associated documentation
07: ("Software"), with or without modification, are permitted provided
08: that the following conditions are met:
09:
10: 1. Redistributions of source code must retain copyright
11: statements and notices. Redistributions must also contain a
12: copy of this document.
13:
14: 2. Redistributions in binary form must reproduce the
15: above copyright notice, this list of conditions and the
16: following disclaimer in the documentation and/or other
17: materials provided with the distribution.
18:
19: 3. The name "groovy" must not be used to endorse or promote
20: products derived from this Software without prior written
21: permission of The Codehaus. For written permission,
22: please contact info@codehaus.org.
23:
24: 4. Products derived from this Software may not be called "groovy"
25: nor may "groovy" appear in their names without prior written
26: permission of The Codehaus. "groovy" is a registered
27: trademark of The Codehaus.
28:
29: 5. Due credit should be given to The Codehaus -
30: http://groovy.codehaus.org/
31:
32: THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33: ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34: NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35: FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
36: THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37: INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38: (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41: STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43: OF THE POSSIBILITY OF SUCH DAMAGE.
44:
45: */
46:
47: package org.codehaus.groovy.control;
48:
49: import java.util.HashSet;
50: import java.util.Iterator;
51:
52: /**
53: * An agent that can be used to defer cleanup operations to
54: * a later time. Users much implement the HasCleanup interface.
55: *
56: * @author <a href="mailto:cpoirier@dreaming.org">Chris Poirier</a>
57: *
58: * @version $Id: Janitor.java 1082 2004-04-19 07:29:47Z cpoirier $
59: */
60:
61: public class Janitor implements HasCleanup {
62: private HashSet pending = new HashSet(); // All objects pending cleanup
63:
64: public void register(HasCleanup object) {
65: pending.add(object);
66: }
67:
68: public void cleanup() {
69: Iterator iterator = pending.iterator();
70: while (iterator.hasNext()) {
71: HasCleanup object = (HasCleanup) iterator.next();
72:
73: try {
74: object.cleanup();
75: } catch (Exception e) {
76: }
77: }
78:
79: pending.clear();
80: }
81: }
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