# event-source-cqrs-sample

**Repository Path**: hdgjun_gitee/event-source-cqrs-sample

## Basic Information

- **Project Name**: event-source-cqrs-sample
- **Description**: Sample ES/CQRS application
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-06-16
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

[![Conference recommends](https://devternity.com/shields/recommends.svg)](https://devternity.com)


# Sample event sourced application with Command Query Responsibility Segregation

** Event sourcing **

Shop item can be bought, paid, and marked as payment timeout. Aggregate root (ShopItem) emits 3 different types of domain events: ItemBought, ItemPaid, ItemPaymentMissing. All of them are consequences of commands.

Event store is constructed in database as EventStream table with collection of EventDescriptors. EventStream is fetched by unique aggregate root uuid.

** CQRS **

Read model is constructed by listening to domain events mentioned before. This task is performed by ReadModelOnDomainEventUpdater