Clustered Event Sourcing and CQRS with Akka and Java

The decomposition of the monolith into systems of microservices does not only involve the division of monolithic code it also often includes the dissolution of monolithic data. Therefore building systems composed of loosely coupled microservices requires new software strategies as well as new data strategies. One of the alternative data strategies commonly used is Event Sourcing & CQRS (Command Query Responsibility Segregation).

In this talk, we will take a look at motivations for and the architecture of ES & CQRS. We will also dig into an example implementation of ES & CQRS implemented with Akka and Java. The Akka toolkit provides an actor based implementation of Event Sourcing & CQRS, which means that you can build solutions that run in distributed clusters. We will also look at how Akka Persistence is built on other Akka features, such as cluster singletons and cluster sharding.

Transcript

1. Hugh McKee (@mckeeh3), Developer Advocate Clustered Event Sourcing and CQRS with Akka and Java
2. What is Event Sourcing and Command Query Responsibility Segregation?
5. Clustered ES & CQRS
10. Evolution from Course Grained to Fine Grained Services
11. monolith microliths uni-DB microservices ES & CQRS microservices microservices multi-DB ES & CQRS
12. Demo project 5 Demo project 4 Demo project 3 Demo project 2 Demo projects 0-1
13. Distributed Actors Akka Clustering
14. Distributed Actors Akka Clustering
15. Distributed Actors Akka Clustering
16. Shard Distribution Akka Cluster Singleton
17. Shard Distribution Akka Cluster Singleton
18. Shard Distribution Akka Cluster Singleton
19. Entity Distributed Sharding Akka Cluster Sharding
20. Entity Distributed Sharding Akka Cluster Sharding
21. Event Sourcing & CQRS Akka Persistence & Persistence Query
22. Event Sourcing & CQRS Akka Persistence & Persistence Query
23. /akka-java-cluster.git /akka-java-cluster-aware.git /akka-java-cluster-singleton.git /akka-java-cluster-sharding.git /akka-java-cluster-persistence.git /akka-java-cluster-persistence-query.git https://github.com/mckeeh3…
24. Upgrade your grey matter!
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25. Hugh McKee (@mckeeh3), Developer Advocate hugh.mckee@lightbend.com