1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.counter.service.persistence;
21  
22  import com.liferay.portal.kernel.dao.jdbc.DataAccess;
23  import com.liferay.portal.kernel.job.IntervalJob;
24  import com.liferay.portal.kernel.job.JobExecutionContext;
25  import com.liferay.portal.kernel.job.JobExecutionException;
26  import com.liferay.portal.kernel.log.Log;
27  import com.liferay.portal.kernel.log.LogFactoryUtil;
28  import com.liferay.portal.kernel.util.Time;
29  import com.liferay.portal.util.PropsValues;
30  
31  import java.sql.Connection;
32  import java.sql.Statement;
33  
34  /**
35   * <a href="ConnectionHeartbeatJob.java.html"><b><i>View Source</i></b></a>
36   *
37   * @author Michael Young
38   *
39   */
40  public class ConnectionHeartbeatJob implements IntervalJob {
41  
42      public static final long INTERVAL =
43          PropsValues.COUNTER_CONNECTION_HEARTBEAT_JOB_INTERVAL * Time.MINUTE;
44  
45      public void execute(JobExecutionContext context)
46          throws JobExecutionException {
47  
48          try {
49              sendHeartbeat();
50          }
51          catch (Exception e) {
52              throw new JobExecutionException(e);
53          }
54      }
55  
56      public long getInterval() {
57          return INTERVAL;
58      }
59  
60      protected void sendHeartbeat() throws Exception {
61          if (_log.isDebugEnabled()) {
62              _log.debug("Sending heartbeat");
63          }
64  
65          Connection connection = CounterUtil.getPersistence().getConnection();
66  
67          Statement statement = null;
68  
69          try {
70              statement = connection.createStatement();
71  
72              statement.execute(_SELECT_RELEASE);
73          }
74          finally {
75              DataAccess.cleanUp(statement);
76          }
77      }
78  
79      private static String _SELECT_RELEASE = "SELECT releaseId FROM Release_";
80  
81      private static final Log _log =
82          LogFactoryUtil.getLog(ConnectionHeartbeatJob.class);
83  
84  }