非入侵的全链路监控系统，代码实现案例共享

发布时间：2023-03-02 10:41:08 所属栏目：安全来源：

导读：案例简述
在下面的我们的计算机监控程序中，需要对各种模块进行监控；servlet、rpc、http、jdbc、redis、logic等，那么我们在设计监控程序时就需要对监控的程序进行模块化开发，可以在需要的时候进行组装配置即可，

案例简述
在下面的我们的计算机监控程序中，需要对各种模块进行监控；servlet、rpc、http、jdbc、redis、logic等，那么我们在设计监控程序时就需要对监控的程序进行模块化开发，可以在需要的时候进行组装配置即可，以方便我们监控程序的扩展和可控制性。这一章节我们把监控模块剥离，使用 factory模式进行调用｛目前是静态工厂在我们实际使用中可以把工厂做成动态配置化｝。

环境准备
IntelliJ IDEA Community Edition
jdk1.8.0_45 64位
配置信息（路径相关修改为自己的）
配置位置：Run/Debug Configurations -> VM options
配置内容：-javaagent:E:\itstack\GIT\itstack.org\itstack-demo-agent\itstack-demo-agent-06\target\itstack-demo-agent-06-1.0.0-SNAPSHOT.jar=testargs
代码示例
复制
itstack-demo-agent-06
├── pom.xml
└── src
├── main
│ ├── java
│ │ └── org.itstack.demo.agent
│ │ ├── plugin
│ │ │ ├── impl
│ │ │ │ ├── jvm
│ │ │ │ │ ├── JvmAdvice.java
│ │ │ │ │ ├── JvmPlugin.java
│ │ │ │ │ └── JvmStack.java
│ │ │ │ └── link
│ │ │ │ ├── LinkAdvice.java
│ │ │ │ └── LinkPlugin.java
│ │ │ ├── InterceptPoint.java
│ │ │ ├── IPlugin.java
│ │ │ └── PluginFactory.java
│ │ │
│ │ ├── track
│ │ │ ├── Span.java
│ │ │ ├── TrackContext.java
│ │ │ └── TrackManager.java
│ │ └── MyAgent.java
│ └── resources
│ └── META-INF
│ └── MANIFEST.MF
└── test
└── java
└── org.itstack.demo.test
└── ApiTest.java

复制
/**
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public class JvmAdvice {

@Advice.OnMethodExit()
public static void exit() {
JvmStack.printMemoryInfo();
JvmStack.printGCInfo();
}

}

复制
/**
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public class JvmPlugin implements IPlugin {

@Override
public String name() {
return "jvm";
}

@Override
public InterceptPoint[] buildInterceptPoint() {
return new InterceptPoint[]{
new InterceptPoint() {
@Override
public ElementMatcher<TypeDescription> buildTypesMatcher() {
return ElementMatchers.nameStartsWith("org.itstack.demo.test");
}

@Override
public ElementMatcher<MethodDescription> buildMethodsMatcher() {
return ElementMatchers.isMethod()
.and(ElementMatchers.any())
.and(ElementMatchers.not(ElementMatchers.nameStartsWith("main")));
}
}
};
}

@Override
public Class adviceClass() {
return JvmAdvice.class;
}

复制
/**
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public class LinkAdvice {

@Advice.OnMethodEnter()
public static void enter(@Advice.Origin("#t") String className, @Advice.Origin("#m") String methodName) {
Span currentSpan = TrackManager.getCurrentSpan();
if (null == currentSpan) {
String linkId = UUID.randomUUID().toString();
TrackContext.setLinkId(linkId);
}
TrackManager.createEntrySpan();
}

@Advice.OnMethodExit()
public static void exit(@Advice.Origin("#t") String className, @Advice.Origin("#m") String methodName) {
Span exitSpan = TrackManager.getExitSpan();
if (null == exitSpan) return;
System.out.println("链路追踪(MQ)：" + exitSpan.getLinkId() + " " + className + "." + methodName + " 耗时：" + (System.currentTimeMillis() - exitSpan.getEnterTime().getTime()) + "ms");
}

LinkPlugin.java

复制
/**
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public class LinkPlugin implements IPlugin {

@Override
public String name() {
return "link";
}

@Override
public InterceptPoint[] buildInterceptPoint() {
return new InterceptPoint[]{
new InterceptPoint() {
@Override
public ElementMatcher<TypeDescription> buildTypesMatcher() {
return ElementMatchers.nameStartsWith("org.itstack.demo.test");
}

@Override
public ElementMatcher<MethodDescription> buildMethodsMatcher() {
return ElementMatchers.isMethod()
.and(ElementMatchers.any())
.and(ElementMatchers.not(ElementMatchers.nameStartsWith("main")));
}
}
};
}

@Override
public Class adviceClass() {
return LinkAdvice.class;
}

}
InterceptPoint.java

复制
/**
* 拦截点
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public interface InterceptPoint {

//类匹配规则
ElementMatcher<TypeDescription> buildTypesMatcher();

//方法匹配规则
ElementMatcher<MethodDescription> buildMethodsMatcher();

复制
/**
* 监控组件
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public interface IPlugin {

//名称
String name();

//监控点
InterceptPoint[] buildInterceptPoint();

//拦截器类
Class adviceClass();

}

PluginFactory.java

复制
/**
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public class PluginFactory {

public static List<IPlugin> pluginGroup = new ArrayList<>();

static {
//链路监控
pluginGroup.add(new LinkPlugin());
//Jvm监控
pluginGroup.add(new JvmPlugin());
}

}

TrackManager.java

复制
/**
* 追踪管控
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
public class TrackManager {

private static final ThreadLocal<Stack> track = new ThreadLocal<>();

private static Span createSpan() {
Stack stack = track.get();
if (stack == null) {
stack = new Stack<>();
track.set(stack);
}
String linkId;
if (stack.isEmpty()) {
linkId = TrackContext.getLinkId();
if (linkId == null) {
linkId = "nvl";
TrackContext.setLinkId(linkId);
}
} else {
Span span = stack.peek();
linkId = span.getLinkId();
TrackContext.setLinkId(linkId);
}
return new Span(linkId);
}

public static Span createEntrySpan() {
Span span = createSpan();
Stack stack = track.get();
stack.push(span);
return span;
}

public static Span getExitSpan() {
Stack stack = track.get();
if (stack == null || stack.isEmpty()) {
TrackContext.clear();
return null;
}
return stack.pop();
}

public static Span getCurrentSpan() {
Stack stack = track.get();
if (stack == null || stack.isEmpty()) {
return null;
}
return stack.peek();
}

复制
/**
* 公众号：bugstack虫洞栈｛获取学习源码｝
* create by fuzhengwei on 2019
*/
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("基于javaagent链路追踪｛源码微信公众号：bugstack虫洞栈｝");
System.out.println("==========================================================\r\n");
AgentBuilder agentBuilder = new AgentBuilder.Default();

List<IPlugin> pluginGroup = PluginFactory.pluginGroup;
for (IPlugin plugin : pluginGroup) {
InterceptPoint[] interceptPoints = plugin.buildInterceptPoint();
for (InterceptPoint point : interceptPoints) {

AgentBuilder.Transformer transformer = (builder, typeDescription, classLoader, javaModule) -> {
builder = builder.visit(Advice.to(plugin.adviceClass()).on(point.buildMethodsMatcher()));
return builder;
};
agentBuilder = agentBuilder.type(point.buildTypesMatcher()).transform(transformer).asDecorator();
}
}

//监听
AgentBuilder.Listener listener = new AgentBuilder.Listener() {
@Override
public void onDiscovery(String s, ClassLoader classLoader, JavaModule javaModule, boolean b) {

}

@Override
public void onTransformation(TypeDescription typeDescription, ClassLoader classLoader, JavaModule javaModule, boolean b, DynamicType dynamicType) {
System.out.println("onTransformation：" + typeDescription);
}

@Override
public void onIgnored(TypeDescription typeDescription, ClassLoader classLoader, JavaModule javaModule, boolean b) {

}

@Override
public void onError(String s, ClassLoader classLoader, JavaModule javaModule, boolean b, Throwable throwable) {

}

@Override
public void onComplete(String s, ClassLoader classLoader, JavaModule javaModule, boolean b) {

}

};

agentBuilder.with(listener).installOn(inst);

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