In this chapter, you learned about the integration tier, as well as integration patterns and how they are implemented. The integration patterns that we learned about included the data-access object pattern, the domain-store pattern, and the service-activator pattern. We also learned about the implementations of these patterns. Furthermore, we learned about the concept of the data-access object pattern, as well as when and how to implement it using the best practices of Java EE 8. We also learned about domain-store pattern concepts, the differences between the domain-store pattern and the data-access object pattern, and when and how to implement domain-store patterns. Finally, we learned about service-activator pattern concepts and when and how to implement this using JMS, EJB asynchronous methods, asynchronous event mechanisms, and the best practices of Java EE 8.
In the next chapter, we will cover reactive patterns, focusing on when to use them and how to implement them using best...