FailoverForTransaction


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.requestmanager.distributed.DistributedRequestManager;
28  import org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase;
29  
30  /**
31   * This class defines a FailoverForTransaction to notify that a client has
32   * transparently failed over for the given transaction.
33   * 
34   * @author <a HREF="mailto:emmanuel.cecchet@continuent.com">Emmanuel Cecchet</a>
35   * @version 1.0
36   */
37  public class FailoverForTransaction extends DistributedVirtualDatabaseMessage
38  {
39    private static final long serialVersionUID = 4356953098910034513L;
40    private long              transactionId;
41  
42    /**
43     * Creates a new <code>FailoverForTransaction</code> object
44     * 
45     * @param transactionId the transaction identifier
46     */
47    public FailoverForTransaction(long transactionId)
48    {
49      this.transactionId = transactionId;
50    }
51  
52    /**
53     * Returns the transactionId value.
54     * 
55     * @return Returns the transactionId.
56     */
57    public long getTransactionId()
58    {
59      return transactionId;
60    }
61  
62    /**
63     * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageSingleThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
64     *      org.continuent.hedera.common.Member)
65     */
66    public Object   handleMessageSingleThreaded(DistributedVirtualDatabase dvdb,
67        Member sender)
68    {
69      return null;
70    }
71  
72    /**
73     * @see org.continuent.sequoia.controller.virtualdatabase.protocol.DistributedVirtualDatabaseMessage#handleMessageMultiThreaded(org.continuent.sequoia.controller.virtualdatabase.DistributedVirtualDatabase,
74     *      org.continuent.hedera.common.Member, java.lang.Object)
75     */
76    public Serializable   handleMessageMultiThreaded(
77        DistributedVirtualDatabase dvdb, Member sender,
78        Object   handleMessageSingleThreadedResult)
79    {
80      long controllerId = transactionId
81          & DistributedRequestManager.CONTROLLER_ID_BIT_MASK;
82      
83      Long   tid = new Long  (transactionId);
84      
85      dvdb.notifyTransactionFailover(new Long  (controllerId), tid);
86      return null;
87    }
88  
89  }
90
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