BTrace示例（八） 捕获方法返回值

被调试程序

@RestController
@RequestMapping("/ch4")
public class Ch4Controller {
    
    @RequestMapping("/arg1")
    public String arg1(@RequestParam("name") String name) {
        return "hello," + name;
    }

}

BTrace脚本

package com.btrace.example;
import com.sun.btrace.AnyType;
import com.sun.btrace.BTraceUtils;
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;

@BTrace
public class PrintReturn {
    
    @OnMethod(
            clazz="com.example.demo.btrace.Ch4Controller",
            method="arg1",
            location=@Location(Kind.RETURN)
    )
    public static void anyRead(@ProbeClassName String pcn, @ProbeMethodName String pmn, @Return AnyType result) {
        BTraceUtils.println(pcn + ", " + pmn + "," + result);
        BTraceUtils.println();
    }

}