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Java HotSwap Guide | JRebel by Perforce

HotSwap allows debuggers to update bytecode in place—but this feature comes with limitations. In this blog post, we look at how to reload classes without dynamic class loaders using Java HotSwap, instrumentation API, and JRebel. HotSwap allows debuggers to update class bytecode in place using the same class identity—in essence, a hot swap of active code. HotSwap allows debuggers to update bytecode

jyukutyo 2018/07/13

oraclecodeone2018

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How to Write a Javaagent | JRebel by Perforce

In this post we’ll look at two approaches to obtaining the bytecode of classes loaded into the JVM and learn a thing or two about how to write javaagents and use HotSpot Debugger, a hidden gem of the JDK. But why would you need to do this? Let's look at a few scenarios. Imagine a situation where you suddenly need to obtain the bytecode of all the loaded classes in a Java process. For example let’s