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.job.IntervalJob;
23  import com.liferay.portal.kernel.job.JobExecutionContext;
24  import com.liferay.portal.kernel.job.JobExecutionException;
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.Time;
28  import com.liferay.portal.util.PropsValues;
29  
30  import java.sql.Connection;
31  import java.sql.Statement;
32  
33  /**
34   * <a href="ConnectionHeartbeatJob.java.html"><b><i>View Source</i></b></a>
35   *
36   * @author Michael Young
37   *
38   */
39  public class ConnectionHeartbeatJob implements IntervalJob {
40  
41      public static final long INTERVAL =
42          PropsValues.COUNTER_CONNECTION_HEARTBEAT_JOB_INTERVAL * Time.MINUTE;
43  
44      public void execute(JobExecutionContext context)
45          throws JobExecutionException {
46  
47          try {
48              sendHeartbeat();
49          }
50          catch (Exception e) {
51              throw new JobExecutionException(e);
52          }
53      }
54  
55      public long getInterval() {
56          return INTERVAL;
57      }
58  
59      protected void sendHeartbeat() throws Exception {
60          if (_log.isDebugEnabled()) {
61              _log.debug("Sending heartbeat");
62          }
63  
64          Connection connection = CounterUtil.getPersistence().getConnection();
65  
66          Statement statement = connection.createStatement();
67  
68          statement.execute(_SELECT_RELEASE);
69      }
70  
71      private static String _SELECT_RELEASE = "SELECT releaseId FROM Release_";
72  
73      private static final Log _log =
74          LogFactoryUtil.getLog(ConnectionHeartbeatJob.class);
75  
76  }