程序启动后启动Java代理程序 [英] Starting a Java agent after program start

问题描述

是否可以在虚拟机启动后从同一个VM中插入javaagent？

Is it possible to insert a javaagent after virtual machine start from within the same VM?

让我们说例如我们在jar myagent.jar中有一个代理适当的元数据设置和已实现的agentmain方法。现在，用户程序调用一个API调用，该调用应该导致代理插入，以便它可以重新定义类。

Lets say for example we have an agent in a jar myagent.jar with the appropriate meta data set-up and an agentmain method already implemented. Now the users program calls an API call which should result in the insertion of the agent so that it can redefine the classes.

它可以完成以及如何完成？

Can it be done and how?

推荐答案

https://web.archive.org/web/20141014195801/http://dhruba.name/2010/02/07/creation -dynamic-and-instrumentation-with-javaagents / 有一个很好的例子，说明如何编写代理以及如何动态启动代理。

https://web.archive.org/web/20141014195801/http://dhruba.name/2010/02/07/creation-dynamic-loading-and-instrumentation-with-javaagents/ has a great example of how to write an agent as well as how to start one on the fly.

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