GetRequestResultFromFailoverCache


1   /**
2    * Sequoia: Database clustering technology.
3    * Copyright (C) 2006 Continuent, Inc.
4    * Contact: sequoia@continuent.org
5    * 
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    * 
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   */
21  
22  package org.continuent.sequoia.controller.virtualdatabase.protocol;
23  
24  import java.io.Serializable  ;
25  
26  import org.continuent.hedera.common.Member;
27  import org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase;
28  
29  /**
30   * This class defines a GetRequestResultFromFailoverCache message that fetches
31   * the result of a specific request identified by its unique id in the failover
32   * cache.
33   * 
34   * @author <a HREF="mailto:emmanuel.cecchet@continuent.com">Emmanuel Cecchet</a>
35   * @version 1.0
36   */
37  public class GetRequestResultFromFailoverCache
38      extends DistributedVirtualDatabaseMessage
39  {
40    private static final long serialVersionUID = 4366642512317344521L;
41  
42    private long              requestId;
43  
44    /**
45     * Creates a new <code>GetRequestResultFromFailoverCache</code> object
46     * 
47     * @param id request id to look for
48     */
49    public GetRequestResultFromFailoverCache(long id)
50    {
51      this.requestId = id;
52    }
53  
54    /**
55     * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageSingleThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
56     *      org.continuent.hedera.common.Member)
57     */
58    public Object   handleMessageSingleThreaded(DistributedVirtualDatabase dvdb,
59        Member sender)
60    {
61      return null;
62    }
63  
64    /**
65     * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageMultiThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
66     *      org.continuent.hedera.common.Member, java.lang.Object)
67     */
68    public Serializable   handleMessageMultiThreaded(
69        DistributedVirtualDatabase dvdb, Member sender,
70        Object   handleMessageSingleThreadedResult)
71    {
72      return dvdb.getRequestResultFailoverCache().retrieve(requestId);
73    }
74  
75  }
76
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