Advanced Event-Driven Structures

As we saw in the previous chapter, event-driven architectures are quite flexible and capable of creating complex scenarios. In this chapter, we will see what are the possible event-driven structures that cover more advanced use cases and how to deal with their complexities.

We will see how some common applications like logs and metrics can be thought of as event-driven systems and use them to generate control systems that will feedback into the system producing the events.

We will also discuss, with an example, how to create complex pipelines where different events are being produced and the system is coordinated. We will also move to a more general overview, introducing the bus as a concept to interconnect all the event-driven components.

We will introduce some general ideas on further complex systems to describe some of the challenges that these kinds of big event-driven systems can produce, such as the need to use CQRS techniques...