Shulou(Shulou.com)06/02 Report--

Arthas source code analysis is what, I believe that many inexperienced people do not know what to do, so this article summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

Arthas (Alsace) uses the command design pattern to encapsulate the core operation command logic. After the user connects to the ShellServerImpl through the telnet/http protocol, the commands executed on the terminal will be parsed into the AnnotatedCommand subclass, and then will be nested into the ProcessImpl/JobImpl structure and executed in the appropriate environment.

The overall structure of AnnotatedCommand is shown below:

Among them, the EnhancerCommand base class references the AdviceWeaver class and realizes the dynamic generation and enhancement of java bytecode with the help of asm library. The dynamically enhanced embedding point code will call back the methods exposed in the AdviceListener interface, thus implementing functions such as monitor/stack/trace for classes / methods in Arthas.

As for the specific command implementations, they will not be expanded here.

After reading the above, have you mastered the method of Arthas source code analysis? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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