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Axon from the trenches: how to keep your code compatible with legacy events and Sagas

Imagine you’re using Axon to run an event sourcing application. Your production event store might contain millions of events, created in various versions of the application. Wouldn’t it be nice to know for sure that the latest version of your application plays nicely with all your production events and Sagas, including those from previous versions? […]

EasyMock: capturing arguments passed to mock objects

EasyMock2 is a library that provides an easy way to create on-the-fly mock objects based on interfaces. It can be used in combination with JUnit to create simple and powerful unit tests. Here’s an overview of the basic EasyMock flow, followed by a brief example that demonstrates a new feature in EasyMock 2.4: capturing arguments passed to MockObjects.