Hello Agent Class

DEMO: 为一个 spring-boot-starter-web 应用添加DispatcherServlet 调用耗时监控

构建:

mvn clean install

运行demo

java -javaagent:demo-agent/target/demo-agent-1.0-SNAPSHOT.jar \
   -jar demo-spring-app/target/demo-spring-app-1.0-SNAPSHOT.jar

执行一次调用

### curl http://127.0.0.1:8080\?name=chpengzh -i
HTTP/1.1 200 
Content-Type: text/plain;charset=UTF-8
Content-Length: 15
Date: Thu, 02 May 2019 08:43:03 GMT

Hello, chpengzh%

从console中可以看到调用栈与调用耗时日志

其中org.springframework.web.servlet.DispatcherServlet.doService$decorated为被监控的转化函数

...
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
org.springframework.web.servlet.DispatcherServlet.doService$decorated(DispatcherServlet.java:942)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
...
统计方法:name=doService,status=200,cast=35ms