java btrace program monitoring method running time call tree

In the project, the monitoring program in the development phase can use breakpoints to complete debugging. For online projects, when monitoring is required:

1. Log analysis,

2. JConsole tool

3. Btrace traces and monitors threads

 

Install Btrace: In the Windows environment, you can directly use the jvisualvm tool that comes with jdk to install the Btrace plug-in. The specific operations are as follows:

1. Enter the jdk installation directory, enter the bin directory, find jvisualvm.exe, open it, search for the plugin BTrace Workbench in the toolbar->tools->plugin, and then install it

2. Start Tomcat where your program is located, you will find a Tomcat menu icon in the jvisualvm.exe window, right-click -> select Trace application

3. If you want to monitor the execution time of the program, copy the following code into the Btrace form

package my.app.btrace;

import static com.sun.btrace.BTraceUtils.*;

import com.sun.btrace.annotations.*;

@BTrace

public class TraceProductManageImpl {

 @OnMethod(clazz = "/com.odianyun.+business.+/", method = "/.+/", location = @Location(Kind.RETURN)) 

 public static void traceExecute(@ProbeClassName String name,@ProbeMethodName String   method,@Duration long time){

 long durationTime = time/1000000;

 if(durationTime > 0){

 String output = strcat(name,".");

 output = strcat(output,method);

 output = strcat(output,"#");

 output = strcat(output,str(probeLine()));

 output = strcat(output,">>");

 output = strcat(output,str(durationTime));

 output = strcat(output,">>ThreadId:");

 output = strcat(output,str(threadId(currentThread())));

 println(output);

 } 

} 

 

}

 

 

If you want to monitor the parameters of the program, run the call tree and replace it with the following code:

ackage my.app.btrace;

import static com.sun.btrace.BTraceUtils.println;

import static com.sun.btrace.BTraceUtils.size;

import static com.sun.btrace.BTraceUtils.str;

import static com.sun.btrace.BTraceUtils.strcat;

import java.util.List;

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.Return;

import com.sun.btrace.annotations.Self;

@BTrace

/**

* Get program parameters

* @author Michael

*/

public class TraceProductManageParam {

 

@OnMethod(clazz = "com.odianyun.frontier.guide.business.read.manage.impl.PromotionManageImpl", method = "getMerchantProductCurrentPromotionPriceBatch", location = @Location(Kind.RETURN))

public static void traceExecute(@ProbeClassName String name,@ProbeMethodName String method,@Self Object self, List<Long> mpIds, Long companyId, @Return List<?> ret){

String output = strcat(name,".");

output = strcat(output,method);

output = strcat(output,">inputItems:");

output = strcat(output, str(mpIds));

output = strcat(output,">outputSize:");

output = strcat(output, str(size(ret)));

println(output);

}

 

}