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Reactive Architecture(5): Distributed Messaging Patterns

Learn important patterns for building Reactive Systems based on asynchronous, non-blocking messages.




About This Course

Reactive Systems are built on a foundation of asynchronous, non-blocking messages. This course will explore that idea in detail. We will discuss replacing distributed transactions with the Saga pattern. We will explore the consequences of building a distributed system on the delivery guarantees we can provide for our messages. Finally we will look at different techniques for delivering the messages like Point to Point or Publish/Subscribe, and how we can leverage external technologies such as a message bus to help.

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Course Syllabus

  • Message Driven Architecture
    • The role of messages in a distributed system.
    • A comparison of synchronous, and asynchronous messages
  • Sagas
    • Introducing the Saga pattern as a way to deal with transactional problems in a distributed system.
  • Messaging Patterns
    • A discussion of The Two Generals Problem
    • Delivery Guarantees in a distributed system
    • Point to Point messaging
    • Publish Subscribe messaging

General Information

  • This course is free.
  • It is self-paced.
  • It can be taken at any time.
  • The materials can be reviewed as many times as you want.
  • Quizzes and exams can only be completed once.

Grading scheme

  • The minimum passing mark for the course is 75%, where the review questions are worth 40%, the case study exercises are worth 30% and the final exam is worth 30% of the course mark.
  • You have 1 attempt to take the final exam with multiple attempts per question.

Course Length

  • Approximately 6 hours


Course Staff

Wade Waldron

Wade Waldron

Wade Waldron is the Director of Training at Lightbend. He is the primary author of the Lightbend Reactive Architecture training course.

Wade started his career as a developer in 2005 building games for the Playstation 2, Xbox, etc. In 2011 he joined Point2 Homes where he began working on an Akka based microservices platform to provide realtime updates to real estate websites. In 2014 Wade joined BoldRadius where he consulted with a variety of companies on how to use Akka, and related technologies. He also began teaching courses on Akka and Scala.

In 2016, Wade released a book "Applied Akka Patterns" along with his co-author Michael Nash

Today Wade works with Lightbend where he consults with clients and builds training materials. He focuses on helping people make a smooth transition from a monolithic application to Reactive microservices.