在ANOTHER JVM中获取已加载的类

Question

I'd like to be able to read data from a separate JVM (essentially "peek" into it) at will so I can read specific class instance values and/or invoke methods. I've looked into using both agents and the attach API but each of them seems to only be designed for runtime instrumentation and not being able to grab the actual instance itself.

Answer 1

An instance of an object only exists in one JVM if you use managed memory.

If you use a data structure which uses shared memory, you can do this eg Chronicle Map This makes memory accessible to multiple JVMs, but only by using off heap, shared memory.