chrono.java

与postgresql数据库结合的数据库水印软件包

package Watermill.kernel;

public class Chrono {
    private static long startTime;
    private static long time[]={(long)0.0,(long)0.0,(long)0.0};
    private static int mode;

    public static final int cpuMode=0;
    public static final int queryMode=1;
    public static final int stopMode=2;

    public static void reset(){
	resetTime();
	time[0]=0;
	time[1]=0;
	time[2]=0;
	mode=cpuMode;
    }

    private static void resetTime(){
	startTime=System.currentTimeMillis();
    }

    private static void accumulate(int desMode){
	time[desMode]+=System.currentTimeMillis()-startTime;
	resetTime();
    }

    public static void setMode(int newMode){
	accumulate(mode);
	mode=newMode;
    }

    public static void stop(){
	setMode(stopMode);
    }

    public static String stats(){
	stop();
	long totalTime=time[0]+time[1];
	return "Time (sec): Total "+totalTime/1000.0+", CPU "+time[cpuMode]/1000.0+", Query "+time[queryMode]/1000.0;
    }
}