基于JavaAgent的全链路监控一《嗨！JavaAgent》

itstack-demo-agent-01
├── pom.xml
└── src
    ├── main
    │   ├── java
    │   │   └── org.itstack.demo.agent
    │   │       └── MyAgent.java
    │   └── resources
    │       └── META-INF
    │           └── MANIFEST.MF
    └── test
         └── java
             └── org.itstack.demo.test
                 └── ApiTest.java

    <properties>
        <!-- Build args -->
        <argline>-Xms512m -Xmx512m</argline>
        <skip_maven_deploy>false</skip_maven_deploy>
        <updateReleaseInfo>true</updateReleaseInfo>
        <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
        <maven.test.skip>true</maven.test.skip>
        <!-- 自定义MANIFEST.MF -->
        <maven.configuration.manifestFile>src/main/resources/META-INF/MANIFEST.MF</maven.configuration.manifestFile>
    </properties>

/**
 * 博客：http://itstack.org
 * 论坛：http://bugstack.cn
 * 公众号：bugstack虫洞栈  ｛获取学习源码｝
 */
public class MyAgent {

    //JVM 首先尝试在代理类上调用以下方法
    public static void premain(String agentArgs, Instrumentation inst) {
        System.out.println("嗨！JavaAgent " + agentArgs);
    }

    //如果代理类没有实现上面的方法，那么 JVM 将尝试调用该方法
    public static void premain(String agentArgs) {
    }

}

Manifest-Version: 1.0
Premain-Class: org.itstack.demo.agent.MyAgent
Can-Redefine-Classes: true

/**
 *
 * http://bigbully.github.io/Dapper-translation/
 *
 * 配置监控
 * VM options：
 * -javaagent:E:\itstack\GIT\itstack.org\itstack-demo-agent\itstack-demo-agent-01\target\itstack-demo-agent-01-1.0.0-SNAPSHOT.jar=testargs
 *
 * 博客：http://itstack.org
 * 论坛：http://bugstack.cn
 * 公众号：bugstack虫洞栈  ｛获取学习源码｝
 * create by fuzhengwei on 2019
 */
public class ApiTest {

    public static void main(String[] args) {
        System.out.println("hi itstack-demo-agent-01");
    }

}

this is my agent：testargs
嗨！JavaAgent

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