Akka Cluster Quickstart Dashboard - Part 2: Cluster Node Lifecycles

How Akka Cluster Works - Project 1, Part 2/4

Watch on YouTube

Welcome to “How Akka Cluster Works”, a multi-project video series that introduces developers and architects working with Java (and Scala) to the inner workings of Akka Cluster. Project 1 is the Akka Cluster Quickstart Dashboard, and contains four parts. In Part 1: Getting Started, we introduced Akka Cluster using a sample Akka Java project that includes a web dashboard.

In Part 2: Cluster Node Lifecycles, we dive into interacting with nodes in the cluster in real-time. Based on the same sample project, you will learn about Akka cluster node membership lifecycles–including how nodes form themselves into clusters using gossip protocols, and what happens to changes in node member states when we begin to start, stop, and down nodes.

What you’ll learn in this video:

• A review of the lifecycle of Akka Cluster nodes
• How do nodes form themselves into a cluster
• How do nodes leave and join a cluster
• What happens when nodes are “killed” or become unreachable

What you need to get started:

• Git
• Java 8+
• Maven
• Sample project: https://github.com/mckeeh3/akka-typed-java-cluster.git

What’s next?

• Coming Soon! Part 3: Project Code Review
• Visit the Akka website for in-depth documentation: https://akka.io/docs
• Schedule a demo of Akka Cluster for your team (see below):

SCHEDULE A DEMO

Author

Hugh McKee

Developer Advocate, Lightbend, Inc.

Twitter: @mckeeh3

Hugh McKee is a developer advocate at Lightbend. He has had a long career building applications that evolved slowly, that inefficiently utilized their infrastructure, and were brittle and prone to failure. Hugh has learned from his past mistakes, battle scars, and a few wins. And the learning never stops. Now his focus is on helping other developers and architects build resilient, scalable, reactive, distributed systems. Hugh frequently speaks at conferences. He is the author of Designing Reactive Systems: The Role Of Actors In Distributed Architecture (O'Reilly).