See demo [`AgentDemo.java`](https://github.com/alibaba/multi-thread-context/blob/master/src/test/java/com/alibaba/mtc/threadpool/agent/AgentDemo.java).
Agent decorate 2 thread pool implementation classes
*[Java SE 6 新特性: Instrumentation 新功能](http://www.ibm.com/developerworks/cn/java/j-lo-jse61/)
*[Creation, dynamic loading and instrumentation with javaagents](http://dhruba.name/2010/02/07/creation-dynamic-loading-and-instrumentation-with-javaagents/)