timer

//第一步
public static void main(String[] args)
{
// PropertyConfigurator.configure("log4j.properties");
  BaseTimer timer = new ReSendTimer();
  timer.startTimer();
}

//第二步（赋值具体要执行任务的类）
/**
*
*/
package com.lolaage.cisvr.timer;

import com.lolaage.cisvr.sysconst.CiSvrConst;

/**
* @author huangye  *
*/
public class ReSendTimer extends BaseTimer
{

/**
  * constructor
  */
public ReSendTimer()
{
  init(CiSvrConst.TIMER, CiSvrConst.RESEND_TIMER_INTERVAL,
  CiSvrConst.RESEND_DEFAULT_TIMER_INTERVAL);
  setTimerTsk(new ReSendTask());
}

}

//第三步（定时启动的规则）
/**
*
*/
package com.lolaage.cisvr.timer;

import java.util.Timer;
import java.util.TimerTask;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.lolaage.cisvr.sysconf.CiSvrConfig;
import com.lolaage.cisvr.sysconf.ICiSvrConfig;
import com.lolaage.cisvr.sysconst.CiSvrConst;

/**
* @author huangye *
*/
public class BaseTimer
{
/**
  * task
  */
private Timer      task;

/**
  * timerTsk
  */
private TimerTask  timerTsk;

/**
  * interval
  */
private int        interval;

/**
  * log
  */
private static Log log = LogFactory.getLog(BaseTimer.class);

/**
  * initialization
  */
public void init(String module, String cfgItem, int defaultVaule)
{
  if (log.isDebugEnabled())
  {
   log.debug("timer initialization.");
  }
  // read interval from config file (从配置中获取定时间隔)
  ICiSvrConfig config = CiSvrConfig.getInstance();
  interval = config.readInt(module, cfgItem);

  if (CiSvrConst.ZERO >= interval)
  {
   if (log.isWarnEnabled())
   {
    log.warn("config data errer.");
   }
   interval = defaultVaule;
  }
  if (log.isInfoEnabled())
  {
   log.info("interval->" + interval);
  }
  task = new Timer();
}

/**
  * start timer
  */
public void startTimer()
{
  // start timer
  if (log.isTraceEnabled())
  {
   log.trace("start timer successfully.");
  }
  task.schedule(timerTsk, CiSvrConst.ZERO, interval
    * CiSvrConst.ONE_SECOND_IN_MILLSECOND);
}

/**
  * @param timerTsk
  *         the timerTsk to set
  */
public void setTimerTsk(TimerTask timerTsk)
{
  this.timerTsk = timerTsk;
}
}

//第四步(定时要执行的任务类)
/**
*
*/
package com.lolaage.cisvr.timer;

import java.util.TimerTask;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.lolaage.cisvr.resource.TaskQueue4CommLayer;

/**
* @author huangye  *
*/
public class ReSendTaskextends TimerTask
{

/**
  * taskQueue4CommLayer
  */
private TaskQueue4CommLayer     taskQueue4CommLayer;

/**
  * log
  */
private static Log              log = LogFactory.getLog(StatTask.class);

/**
  * constructor
  */
public ReSendTask()
{
  taskQueue4CommLayer = TaskQueue4CommLayer.getInstance();
}

/*
  * (non-Javadoc)
  *
  * @see java.util.TimerTask#run()
  */
public void run()
{
  try
  {
       //定时要执行的任务  
  }
  catch (Exception e)
  {
   if (log.isErrorEnabled())
   {
    log.error(e);
   }
  }
}
}