Axon Spring Boot Demo - Handle only events published by same instance

This Spring Boot demo project shows how to configure the Axon Framwork, so that Events are only handled by the instances which publish them.

See Stack Overflow discussion with Steven van Beelen for further details.

Basic Axon Setup

• Axon Spring Boot Starter:
  Spring Boot Autoconfiguration for Axon.

• JpaEventStorageEngine:
  A SQL Server based JpaEventStorageEngine as EventStore & TokenStore.

• TrackingeEventProcessor:
  A TrackingEventProcessor for a single EventSource is configured (default of Axon Spring Boot Starter).

• CorrelationDataProvider:
  A CorrelationDataProvider is used to add Metadata to every published Event.

• MessageHandlerInterceptor:
  A MessageHandlerInterceptor is used filter Events which should be processed by the same application instance.

How to run

1) Start Docker Compose based SQL Server instance

Use the sql-server-test-db run config if you’re using IntelliJ IDEA or start the docker-compose.yml otherwise.

2) Start instance of Spring Boot application

Use the new-app-instance run config if you’re using IntelliJ IDEA or start the Application.kt otherwise.