Wiring up an event-message handling service

Recently, in a project I’m working on, I needed to create a service that would allow me to monitor what was going on in the application. In this case, log file info wasn’t rich enough for the type of analysis required. We wanted a contextualized view of what was going on at any moment within this application, but also to measure key aspects of its use. In a sense, it would be an implementation of some of the control patterns referred to in Architecting Enterprise Solutions: Patterns for High-capability Internet-based Systems (Wiley Software Patterns Series)
, such as the System Monitor.

Lately I’ve been looking at and quite interested in CQRS. I like the concept and what it offers, especially when used with event sourcing. Unfortunately, I haven’t been able to apply it for many reasons, namely lack of experience with it and time to focus on learning how to do it, especially considering the need for features in a time constrained production application. For this particular case, though, I considered I could use some of the concepts to get to a solution that’ll do what I want.

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