An introduction to the new asynchronous Scala and Java relational database access API and its Netty-based PostgreSQL driver with simple Akka Streams and Play Framework integration examples. Community feedback is greatly appreciated!

In the era of asynchronous programming, it’s important to know that function invocations that form a logical chain in the source code are not confined to one thread. This article shows the way of tracing the chain when using Scala Futures.

This article is an overview of dependency injection (DI) techniques that can be used in Scala Play framework apps: Guice, manual DI, the cake pattern, MacWire, and the reader monad.