Hello all. I'm at the point where I need to pick the brains of those of you who have spent significant time with Drools I am just in the process of trying to decide if Drools is the right choice for a high volume trading application. It would be best if there were some simple examples out there of how to create this type of app in Drools but I suspect they don't exist. (The reason I even considered moving to a CEP framework is that I know that Streambase claims to be ideal for this type of application. But they are way out of our budget.) The application we are developing is highly modular and multi-threaded with many self-contained operations/modules that can be performed in parallel on incoming events. Each threaded module would take as its inputs either the input stream event or the outputs some other modules. Eventually the various outputs would be combined into an output trade request event. I can envisage how to create such an application directly in Java using, say, the Observer pattern (where each of the modules subscribes to its desired inputs) but it's difficult to get this to run multi-threaded and we are going to need to be able to use all the processors and cores available on the executing server. It's also a clumsy way to implement what should be an elegant architecture. If I understand the Drools paradigm correctly, Drools should take care of multi-threading and timestamp synchronization automatically. This is the appeal. I fear this is coming out a little like gobbledegook but before I spend much more time on understanding how Drools works, I thought some of you experts might have some simple words of advice. Any comments or suggestions or am I way off base here? Thanks! Nigel -- View this message in context: http://drools.46999.n3.nabble.com/Any-high-volume-trading-examples-tp3118... Sent from the Drools: User forum mailing list archive at Nabble.com.