Just wandering how your correlate the transaction cross JVMs, for example the web tier and the business logic tier.

This is not a new idea, even for Java, though. The most successful Java tool using this approach is perhaps jEdit, where you can write “macros” using a scripting language; the default language for jEdit macros is BeanShell, but you can use others. There are dozens of macros available, many of them contributed by the community.

Upside: people can contribute with less effort, and it takes pressure off the developer of the editor for new features.

Downside: in my experience, the biggest downside at least in jEdit’s case, was that scripts are somewhat slower than compiled Java. For any script that gets executed while the UI is being used, you can get tiny pauses when a script is fired, which can make the UI feel sluggish if too much is based on scripts. Also, since scripts were so easy to write, I found people spent less time creating reusable libraries (to write scripts on top of) and there was a certain amount of duplication between them.

Looking forward to seeing what you do with it.

Patrick