1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.counter.service.persistence;
24  
25  import com.liferay.portal.kernel.dao.jdbc.DataAccess;
26  import com.liferay.portal.kernel.job.IntervalJob;
27  import com.liferay.portal.kernel.job.JobExecutionContext;
28  import com.liferay.portal.kernel.job.JobExecutionException;
29  import com.liferay.portal.kernel.log.Log;
30  import com.liferay.portal.kernel.log.LogFactoryUtil;
31  import com.liferay.portal.kernel.util.Time;
32  import com.liferay.portal.util.PropsValues;
33  
34  import java.sql.Connection;
35  import java.sql.Statement;
36  
37  /**
38   * <a href="ConnectionHeartbeatJob.java.html"><b><i>View Source</i></b></a>
39   *
40   * @author Michael Young
41   *
42   */
43  public class ConnectionHeartbeatJob implements IntervalJob {
44  
45      public static final long INTERVAL =
46          PropsValues.COUNTER_CONNECTION_HEARTBEAT_JOB_INTERVAL * Time.MINUTE;
47  
48      public void execute(JobExecutionContext context)
49          throws JobExecutionException {
50  
51          try {
52              sendHeartbeat();
53          }
54          catch (Exception e) {
55              throw new JobExecutionException(e);
56          }
57      }
58  
59      public long getInterval() {
60          return INTERVAL;
61      }
62  
63      protected void sendHeartbeat() throws Exception {
64          if (_log.isDebugEnabled()) {
65              _log.debug("Sending heartbeat");
66          }
67  
68          Connection connection = CounterUtil.getPersistence().getConnection();
69  
70          Statement statement = null;
71  
72          try {
73              statement = connection.createStatement();
74  
75              statement.execute(_SELECT_RELEASE);
76          }
77          finally {
78              DataAccess.cleanUp(statement);
79          }
80      }
81  
82      private static String _SELECT_RELEASE = "SELECT releaseId FROM Release_";
83  
84      private static final Log _log =
85          LogFactoryUtil.getLog(ConnectionHeartbeatJob.class);
86  
87  }