Btrace简单应用

HelloWorld类：

package my.app.test;  
  
import java.util.Random;  
  
public class HelloWorld {  
    public static void main(String[] args) throws Exception {  
        //CaseObject object = new CaseObject();  
        while (true) {  
            Random random = new Random();  
            execute(random.nextInt(4000));  
              
            //object.execute(random.nextInt(4000));  
        }  
    }  
    public static Integer execute(int sleepTime) {  
        try {  
            Thread.sleep(sleepTime);  
        } catch (Exception e) {  
        }  
        System.out.println("helloworld execute thread sleep time is=>"+sleepTime);  
        return 0;  
    }  
}  

TraceHelloWorld跟踪类

package btrace;

import static com.sun.btrace.BTraceUtils.println;  
import static com.sun.btrace.BTraceUtils.str;  
import static com.sun.btrace.BTraceUtils.strcat;  
import static com.sun.btrace.BTraceUtils.timeMillis;  
  
import com.sun.btrace.annotations.BTrace;  
import com.sun.btrace.annotations.Kind;  
import com.sun.btrace.annotations.Location;  
import com.sun.btrace.annotations.OnMethod;  
import com.sun.btrace.annotations.ProbeClassName;  
import com.sun.btrace.annotations.ProbeMethodName;  
import com.sun.btrace.annotations.TLS;  
@BTrace  
public class TraceHelloWorld {  
      
    @TLS  
    private static long startTime = 0;  
      
    @OnMethod(clazz = "my.app.test.HelloWorld", method = "execute")  
    public static void startMethod(){  
        startTime = timeMillis();  
    }  
      
    @OnMethod(clazz = "my.app.test.HelloWorld", method = "execute", location = @Location(Kind.RETURN))  
    public static void endMethod(){  
        println(strcat("the class method execute time=>", str(timeMillis()-startTime)));  
        println("-------------------------------------------");  
    }  
      
    @OnMethod(clazz = "my.app.test.HelloWorld", method = "execute", location = @Location(Kind.RETURN))  
    public static void traceExecute(@ProbeClassName String name,@ProbeMethodName String method,int sleepTime){  
        println(strcat("the class name=>", name));  
        println(strcat("the class method=>", method));  
        println(strcat("the class method params=>", str(sleepTime)));  
          
    }  
}  

启动:在btrace的bin目录下启动 : 

btrace pid TraceHelloWorld(全路径)