Crate esrs

This crate gives you an opinionated way of implement CQRS/event sourcing.

Under the hood, without postgres feature enabled, this crate just expose some traits that can be used in order to implement your version of the CQRS/event sourcing pattern. The main actors are the Aggregate (with its manager), AggregateState, store::EventStore and the store::StoreEvent.

The approach is to have a way, at runtime, to reload the state from an event store. This means that everytime an aggregate state is needed the state should be loaded So, for example while using postgres event store, everytime a state load is required a database query is performed over the event store table.

Modules

bus

event

handler

manager

rebuilder

sql

store

types

Provides custom types.

Macros

statement

Structs

AggregateState

The internal state for an Aggregate. It contains:

Traits

Aggregate

The Aggregate trait is responsible for validating commands, mapping commands to events, and applying events onto the state.