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Java > Open Source Codes > org > continuent > sequoia > controller > recoverylog > events > ShutdownLogEvent


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.recoverylog.events;
23
24 import org.continuent.sequoia.controller.recoverylog.LoggerThread;
25
26 /**
27  * This class defines a ShutdownLogEvent. Post an instance
28  * of this class to the recoverly log to force it to shut down.
29  *
30  * @author <a HREF="mailto:robert.hodges@continuent.com">Robert Hodges</a>
31  * @version 1.0
32  */
33 public class ShutdownLogEvent implements LogEvent
34 {
35   /**
36    * Creates a new <code>ShutdownLogEvent</code> instance.
37    */
38   public ShutdownLogEvent()
39   {
40     super();
41   }
42
43   /**
44    * @see org.continuent.sequoia.controller.recoverylog.events.LogEvent#belongToTransaction(long)
45    */
46   public boolean belongToTransaction(long tid)
47   {
48     return false;
49   }
50
51   /**
52    * Close recovery log and invoke shutdown on the logger thread which will
53    * cause it to terminate as soon as processing of this event is completed.
54    *
55    * @see org.continuent.sequoia.controller.recoverylog.events.LogEvent#execute(org.continuent.sequoia.controller.recoverylog.LoggerThread)
56    */
57   public void execute(LoggerThread loggerThread)
58   {
59     // This closes the database. For local Hypersonic recovery logs we
60 // may in future want to issue a SHUTDOWN COMPACT to ensure the
61 // database is stored efficiently.
62 loggerThread.invalidateLogStatements();
63     loggerThread.shutdown();
64     synchronized(this)
65     {
66       notify();
67     }
68     loggerThread.getLogger().info("Executed log shutdown event");
69   }
70 }
71
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