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.io.Serializable;
30:
31: import org.cougaar.core.mts.MessageAddress;
32: import org.cougaar.core.persist.NotPersistable;
33: import org.cougaar.core.relay.Relay;
34: import org.cougaar.core.util.UID;
35:
36: /**
37: * A {@link org.cougaar.core.relay.Relay.TargetFactory} for
38: * freeze {@link Relay}s.
39: * <p>
40: * NOTE: This is part of the older mechanism for freezing the society. The
41: * current mechanism uses FreezeServlet located on every agent in the society,
42: * and depends on some external process to tell all agents to freeze. This older
43: * mechanism has not been removed so that people can continue to use a single servlet
44: * to freeze the entire society, but the FreezeServlet mechanism is preferred now.
45: */
46: public class FreezeRelayFactory implements Relay.TargetFactory,
47: NotPersistable, Serializable {
48: private static FreezeRelayFactory instance;
49:
50: public static synchronized Relay.TargetFactory getTargetFactory() {
51: if (instance == null) {
52: instance = new FreezeRelayFactory();
53: }
54: return instance;
55: }
56:
57: // TargetFactory implementation
58: public Relay.Target create(UID uid, MessageAddress source,
59: Object content, Relay.Token token) {
60: FreezeRelayTarget result = new FreezeRelayTarget(source);
61: result.setUID(uid);
62: return result;
63: }
64: }
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