01: /**
02: * Sequoia: Database clustering technology.
03: * Copyright (C) 2006 Continuent, Inc.
04: * Contact: sequoia@continuent.org
05: *
06: * Licensed under the Apache License, Version 2.0 (the "License");
07: * you may not use this file except in compliance with the License.
08: * You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS,
14: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15: * See the License for the specific language governing permissions and
16: * limitations under the License.
17: *
18: * Initial developer(s): Emmanuel Cecchet.
19: * Contributor(s): ______________________.
20: */package org.continuent.sequoia.controller.virtualdatabase.protocol;
21:
22: import java.io.Serializable;
23:
24: import org.continuent.hedera.common.Member;
25: import org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase;
26:
27: /**
28: * This class defines a GetRequestResultFromFailoverCache message that fetches
29: * the result of a specific request identified by its unique id in the failover
30: * cache.
31: *
32: * @author <a href="mailto:emmanuel.cecchet@continuent.com">Emmanuel Cecchet</a>
33: * @version 1.0
34: */
35: public class GetRequestResultFromFailoverCache extends
36: DistributedVirtualDatabaseMessage {
37: private static final long serialVersionUID = 4366642512317344521L;
38:
39: private long requestId;
40:
41: /**
42: * Creates a new <code>GetRequestResultFromFailoverCache</code> object
43: *
44: * @param id request id to look for
45: */
46: public GetRequestResultFromFailoverCache(long id) {
47: this .requestId = id;
48: }
49:
50: /**
51: * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageSingleThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
52: * org.continuent.hedera.common.Member)
53: */
54: public Object handleMessageSingleThreaded(
55: DistributedVirtualDatabase dvdb, Member sender) {
56: return null;
57: }
58:
59: /**
60: * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageMultiThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
61: * org.continuent.hedera.common.Member, java.lang.Object)
62: */
63: public Serializable handleMessageMultiThreaded(
64: DistributedVirtualDatabase dvdb, Member sender,
65: Object handleMessageSingleThreadedResult) {
66: return dvdb.getRequestResultFailoverCache().retrieve(requestId);
67: }
68:
69: }
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