Summary
In this chapter, we explored a few things. We did a blow-by-blow comparison of how a process would be handled through synchronous API communication versus asynchronous communication. We then expanded our general knowledge of how messaging systems can be leveraged to support an asynchronous communication model for our services. In all of this, we discussed challenges that we can face with data consistency between operations and how we can gauge acceptable metrics for this unavoidable factor. In the latter parts, we reviewed two popular messaging systems and then discussed some of the outright disadvantages that we have to contend with in this paradigm.
In our next chapter, we will explore the Command-Query Responsibility Segregation (CQRS) pattern and how it helps us to write cleaner code in our services.
