Event Sourced aggregates

Now, it is time to take a better look at how we can persist aggregates by saving the history of changes. In this section, we will discuss what event streams are and how we can use streams to persist aggregates to an event store and retrieve them. Of course, this implies that we will cover the topic of event stores, as well.

Event streams

So far, on all of the diagrams, we have seen events for only one aggregate. Of course, such a system is useless, and we need to find a way to store events for different aggregates, in order to make the system functional. The main requirement here would be that we need to be able to retrieve events for a single aggregate, preferably in one read. Of course, if there...