package mmscenter;/** * <p>Title:  </p> * <p>Description:  </p> * <p>Copyright: Copyright (c) 2002</p> * <p>Company:  </p> * @author rjz * @version 1.0 */public class Engine extends Thread{  //引擎狀態  //  ------------------------------------------------  //                  RUNNING（運行狀態）  //  ------------------------------------------------  //          |                         |  //  ------------------------------------------------  //  ACCELERATE（加速狀態）    DECELERATE（減速狀態）  //  ------------------------------------------------  //          |                         |  //  ------------------------------------------------  //                  STOPPED（停止狀態）  //  ------------------------------------------------  //  public final static int THREAD_ACCELERATE	= 0;  public final static int THREAD_RUNNING		= 1;  public final static int THREAD_DECELERATE	= 2;  public final static int THREAD_STOPPED		= 3;        public String engineName;  //引擎狀態  public int m_nStatus = THREAD_STOPPED;  public Engine(String strName)  {    super(strName);                this.engineName=strName;                this.setDaemon(true);  }  public boolean isRunning()  {    if(m_nStatus == THREAD_RUNNING)    {      return true;    }    return false;  }  public boolean isStopped()  {    if(m_nStatus == THREAD_STOPPED)    {      return true;    }    return false;  }  public void startup()  {    if(m_nStatus == THREAD_ACCELERATE || m_nStatus == THREAD_RUNNING)    {      return;    }    m_nStatus = THREAD_RUNNING;    start();  }  public void shutdown()  {    if(m_nStatus == THREAD_DECELERATE || m_nStatus == THREAD_STOPPED)    {      return;    }    m_nStatus = THREAD_DECELERATE;  }        public void sleep(int s){                try    {      Thread.sleep(s);    }    catch(Exception e)    {      //Config.log.log(e,this.engineName+".sleep : unepected exit !");    }  }  public void sleep()  {    try    {      Thread.sleep(1000);    }    catch(Exception e)    {      //Config.log.log(e,this.engineName+".sleep : unepected exit !");    }  }  public void nap()  {    try    {      Thread.sleep(5);    }    catch(Exception e)    {      //Config.log.log(e,this.engineName+".nap : unepected exit !");    }  }  public void wait(Engine engine)  {    int nStatus = engine.m_nStatus;    //如果線程已經停止或者已經啟動，則不需要再等待狀態變化。    if(nStatus == THREAD_STOPPED || nStatus == THREAD_RUNNING)    {      return;    }    //等待線程的狀態發生變化。    long lStartTime = System.currentTimeMillis();    while(engine.m_nStatus == nStatus)    {      if(TimeConfig.DEFAULT_WAIT_TIME > 0 &&        System.currentTimeMillis() - lStartTime > TimeConfig.DEFAULT_WAIT_TIME)      {        break;      }      //稍等      nap();    }  }        public String toString(){                return this.engineName;        }}