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.