Summary

In this chapter, we have built a well-tested service using Kotlin that uses the Ktor framework to store entities in the database. We've also discussed how the multiple design patterns that we encountered at the beginning of this book, such as Factory, Singleton, and Bridge, are used in the Ktor framework to provide a flexible structure for our code.

Now, you should be able to interact with the database using the Exposed framework. We've learned how we can declare, create, and drop tables, how to insert new entities, and how to fetch and delete them.

In the next chapter, we'll look at an alternative approach to developing web applications, but this time using a Reactive framework called Vert.x. This will allow us to compare the concurrent and Reactive approaches for developing web applications and discuss the tradeoffs of each of the approaches.