In this chapter, we covered a few features brought by WebLogic Server and Java EE 6 that help the development process by cutting deployment time, optimizing class redefinitions without the need to restart the whole application, finding classloader issues, and how to monitor server resources in a simple way.

The purpose of the book is to refresh or introduce Java EE 6 concepts implemented by WebLogic Server 12c, by showing how to apply them in a real-world scenario, presenting product-specific features that would be relevant to make things easier and more productive, both during design and runtime.

So, we covered topics such as persistence configuration and usage, the mechanics of sending and receiving asynchronous messages by using JMS and remote clients, how to create and use events, interceptors, and validations rules, how to secure an application, the main techniques used to scale up your code to process larger quantities of requests, and how to use communication channels such as Web Services, RESTful clients, and WebSockets, among other things.

There is still a plethora of features and details to explore, but you're on the right track to build enterprise-grade applications by using the book's content as a starting point. Happy coding!