Book Image

Akka Cookbook

By : Vivek Mishra, Héctor Veiga Ortiz
Book Image

Akka Cookbook

By: Vivek Mishra, Héctor Veiga Ortiz

Overview of this book

Akka is an open source toolkit that simplifies the construction of distributed and concurrent applications on the JVM. This book will teach you how to develop reactive applications in Scala using the Akka framework. This book will show you how to build concurrent, scalable, and reactive applications in Akka. You will see how to create high performance applications, extend applications, build microservices with Lagom, and more. We will explore Akka's actor model and show you how to incorporate concurrency into your applications. The book puts a special emphasis on performance improvement and how to make an application available for users. We also make a special mention of message routing and construction. By the end of this book, you will be able to create a high-performing Scala application using the Akka framework.
Table of Contents (18 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Uploading a file using Akka HTTP

Another common use of REST APIs is to transfer files. This seems an easy task at first; however, it gets complicated when files become large. Most times it is not possible to store an entire file inside an HTTP request if the file is large. The HTTP protocol provides a special Content-Type for this purpose, named multipart/form-data. When using this Content-Type, the file gets sent in parts (known as body parts). Akka HTTP provides a functionality to receive these parts and put the file together on the server side. Moreover, it allows you to run some functionality as the parts are reaching the server to speed up processing in case it is required. This is known as the streaming approach.

In this recipe, we will create a REST API that is able to receive text files in both the approaches-regular and streaming. Also, we will create a client that will upload the file to the server using the Akka HTTP Client API.

Getting ready

To step through this recipe, we need...