01: /*
02: * <copyright>
03: *
04: * Copyright 2001-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.core.plugin.freeze;
28:
29: import java.util.Collections;
30: import java.util.HashMap;
31: import java.util.HashSet;
32: import java.util.Iterator;
33: import java.util.Map;
34: import java.util.Set;
35:
36: import org.cougaar.core.mts.MessageAddress;
37: import org.cougaar.core.persist.NotPersistable;
38: import org.cougaar.core.relay.Relay;
39: import org.cougaar.core.util.SimpleUniqueObject;
40:
41: /**
42: * A source-side freeze {@link Relay}.
43: * <p>
44: * NOTE: This is part of the older mechanism for freezing the society. The
45: * current mechanism uses FreezeServlet located on every agent in the society,
46: * and depends on some external process to tell all agents to freeze. This older
47: * mechanism has not been removed so that people can continue to use a single servlet
48: * to freeze the entire society, but the FreezeServlet mechanism is preferred now.
49: */
50: public class FreezeRelaySource extends SimpleUniqueObject implements
51: Relay.Source, NotPersistable {
52: transient Map targets;
53:
54: FreezeRelaySource(Set targets) {
55: this .targets = new HashMap();
56: for (Iterator i = targets.iterator(); i.hasNext();) {
57: Object target = i.next();
58: this .targets.put(target, Collections.singleton(target));
59: }
60: }
61:
62: // Application Source API
63: synchronized Set getUnfrozenAgents() {
64: Set ret = new HashSet();
65: for (Iterator i = targets.values().iterator(); i.hasNext();) {
66: Set unfrozen = (Set) i.next();
67: ret.addAll(unfrozen);
68: }
69: return ret;
70: }
71:
72: // Relay.Source implementation
73: public Set getTargets() {
74: return targets.keySet();
75: }
76:
77: public Object getContent() {
78: return null; // No actual content; only responses
79: }
80:
81: public TargetFactory getTargetFactory() {
82: return FreezeRelayFactory.getTargetFactory();
83: }
84:
85: public int updateResponse(MessageAddress target, Object response) {
86: synchronized (targets) {
87: targets.put(target, response);
88: return Relay.RESPONSE_CHANGE;
89: }
90: }
91: }
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