How to store rmi connections in java?

If you can't modify A then B needs to be responsible for blocking until C produces a result, and returning that result synchronous as the result of the RMI method.

If you can't modify A, then B needs to be responsible for blocking until C produces a result, and returning that result synchronous as the result of the RMI method. So it seems the problem is more about how C can reply to B (or "Bs", since it sounds like you have a cluster of these) than how to respond to A. Normally, synchronous calls like this are simulated via JMS by creating a temporary queue, and specifying that as the reply address on the message.So, B would create a temporary queue, then block on that queue until it received the result back from C, then return the content of the reply to A.

I might not understand your circumstances fully, but it seems like any other approach would require modifications to the A–B interface.

Excellent idea! – Marcos Roriz Nov 20 '09 at 20:59.

Well I can't modify A, since it's a client and I can't modify the interface. Well I'm doing that because on my B code I'm doing balancing of servers. I'm treating a lot of things there for the "client" A.

– Marcos Roriz Nov 20 '09 at 20:15.

Sounds like Apache Camel is exactly what you need; its a framework for doing just this sort of Enterprise integration. The components page has examples of how to set up RMI and JMS (and myriad other) endpoints. You'll then write a route using its powerful DSL to forward messages from one endpoint to the other.

Definitely going to take a look at that :3 – Marcos Roriz Nov 20 '09 at 20:50.

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