CQRS with Anvil

Anvil fits CQRS because controllers only call commands and queries. The command and query implementation stays in your application packages.

Commands

type CreateProject struct {
  Store project.WriteStore
}

func (h CreateProject) Run(ctx context.Context, input CreateProjectInput) (project.Project, error) {
  return h.Store.Create(ctx, input)
}

Queries

type GetProject struct {
  ReadModel project.ReadModel
}

func (h GetProject) Run(ctx context.Context, id project.ID) (project.View, error) {
  return h.ReadModel.Find(ctx, id)
}

Controller

type Projects struct {
  sdk.Controller `path:"/projects"`

  CreateProject commands.CreateProject
  GetProject    queries.GetProject
}

The generated DI container wires the command and query handlers like any other dependency. Anvil does not require CQRS, but it does not fight it.