In this chapter, we've learned how to write a basic web application. The application brought together some of the services we've defined in the previous chapters.
The application has layered architecture. The entire configuration was carried out with Spring Framework (data sources, repositories, transactions, knowledge bases, services, view controllers, and others). Spring makes it easy to change the configuration without recompiling the code.
We've learned how to integrate transactions with our services. For example, all new customers are validated, persisted, and all of this happens within a transaction. Further, the complex event processing service is notified about all of the important events within the application.
The loan approval ...