This is the Java/Spring version of the Event Sourcing/CQRS money transfer example application.

About the application

This application consists of three microservices:

Account Service - the command side business logic for Accounts
Money Transfer Service - the command side business logic for Money Transfers
Query service - query side implementation of a MongoDB-based, denormalized view of Accounts and MoneyTransfers

The Account Service consists of the following modules:

accounts-command-side-backend - the Account aggregate
accounts-command-side-web - a REST API for creating and retrieving Accounts
accounts-command-side-service - a standalone microservice

The Money Transfer Service consists of the following modules:

transactions-command-side-backend - the MoneyTransfer aggregate
transactions-command-side-web - a REST API for creating and retrieving Money Transfers
transactions-command-side-service - a standalone microservice

The Query Service consists the following modules:

accounts-query-side-backend - MongoDB-based, denormalized view of Accounts and MoneyTransfers
accounts-query-side-web - a REST API for querying the denormalized view
accounts-query-side-service - a standalone microservice

Deploying the application

These services can be deployed either as either separate standalone services using the Event Store server, or they can be deployed as a monolithic application for simplified integration testing.

The three services can also be packaged as a single monolithic web application in order to be used with the embedded Event Store:

monolithic-service - all-in-one, monolithic packaging of the application