1
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
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 }