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;

@BTrace
public class PrintArgSimple {
    
    @OnMethod(
            clazz="com.example.demo.btrace.Ch4Controller",
            method="arg1",
            location=@Location(Kind.ENTRY)
    )
    public static void anyRead(@ProbeClassName String pcn, @ProbeMethodName String pmn, AnyType[] args) {
        BTraceUtils.printArray(args);
        BTraceUtils.println(pcn);
        BTraceUtils.println(pmn);
        BTraceUtils.println();
    }

}

执行BTrace脚本

• 当发起请求时：

http://localhost:8088/ch4/arg1?name=333

• 执行的BTrace脚本会拦截到：

btrace 19384 C:\Users\LiXinlei\Desktop\btrace\src\com\btrace\example\PrintArgSimple.java
[333, ]
com.example.demo.btrace.Ch4Controller
arg1