go-cqrs

CQRS/es implementation in go

Aggregates

todo

Commands

todo

Events

todo

Event store and streams

todo

Factories

todo

Aggregate repository

todo

Projections

todo

Middleware for command handler

todo

Event publishing

todo

Examples

Examples are in the _example directory.

Inventory example This is the GO version of the C# Simple CQRS example from Gregory Young.

Passing events by value not by pointer reference

Events are always passed by value, never passed by pointer reference. This is to ensure immutability of the events data.

• The Load method of the aggregate repository will always convert pointer events and pass them by value to the aggregates Apply function.
• The Save method of the aggregate repository will convert any pointer referenced events and pass them by value to the aggregate Apply method and to the publish event hooks (PublishEventFunc)

Always refer to the class name of an event in your aggregates and projections. Never to the pointer variant, it will probably never be picked up

EventFactory

The event factory must always return a pointer to the newly created event. This is of the event stream needs to scan/unmarshal the data into the event instance and can only do this for pointer instances. Later on the newly created event will be passed by value to the aggregates and or projections.

Todo

• Test the domain aggregate repository.
• More real world examples.
• See how it performs in my projects.
• Documentation documentation documentation.
• Write test for Snapshot repository
• Create Mysql and Postgres variant for SnapshotStore