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


1 /**
2  * Sequoia: Database clustering technology.
3  * Copyright (C) 2005 Emic Networks.
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 interface defines a LogEvent that defines the profile of actions that
28  * manipulate the recovery log like logging a request.
29  *
30  * @author <a HREF="mailto:emmanuel.cecchet@emicnetworks.com">Emmanuel Cecchet</a>
31  * @version 1.0
32  */
33 public interface LogEvent
34 {
35   /**
36    * Returns true if this logEvent belongs to the given transaction.
37    *
38    * @param tid the transaction identifier
39    * @return true if this logEvent belongs to this transaction
40    */
41   boolean belongToTransaction(long tid);
42
43   /**
44    * Called by the LoggerThread to perform the needed operation on the log for
45    * this entry.
46    *
47    * @param loggerThread the logger thread calling this method
48    */
49   void execute(LoggerThread loggerThread);
50
51 }
52
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