Lightbend Akka Streams for Java - Professional

This one day course introduces experienced Akka developers to the Akka Streams API. Akka Streams enables the consumption of streaming data, in a fully non-blocking, asynchronous manner. It also allows us to consume that data while providing non-blocking backpressure to prevent mailbox overflows. Our goal is to learn the components that make up the Akka Streams API and how they interact. We will see a broad range of different Akka Streams components and have a chance to use many of them.

Course Objectives

After having participated in this course you should

  • Understand the basic concepts of Akka Streams
  • Know how to build linear streams using Sources, Sinks, and Flows
  • Know how to implement fault tolerant streams
  • Know how to introduce non-linear graph shapes into your streams
  • Be confident to start using Akka Streams in production systems


  1. Sources
  2. Sinks
  3. Flows
  4. Runnable Graphs
  5. Fault Tolerance
  6. Graphs
  7. Fusing


  • Code examples and exercises will be written in Java, so a working knowledge of Java is required.
  • We will leverage operations similar to those in the Java Streams API. Knowledge of the Streams API is very beneficial.
  • Code examples and exercises will leverage Java Lambdas, so a working knowledge of Lambdas is required.
  • We will need concepts from Akka Actors. A basic knowledge of Actors, Dispatchers, and Mailboxes is required.


  • Level: Intermediate - knowledge of and practical experience with Java and Akka is assumed
  • Length: One and 1/2 days - 10-12 hours of classroom time, plus breaks
  • Approach: Extensive hands-on coding - students develop a workshop case study and produce an application based on a streaming architecture
  • Requirements: Students must bring their own laptops with Java 8

Related Trainings

  • Lightbend Reactive Architecture - Professional
  • Lightbend Akka for Java - Professional
  • Lightbend Akka for Java - Expert

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