ioc

Documentation

Overview

Package ioc provides a simple generics based registry which allows registering instance providers for a name and then instantiating instances, returning instances of the requested type.

Index

• func Get[T any](r Registry, name string) (T, error)
• type Provider
• type ProviderF
  • func (f ProviderF) Get() any
• type Registry
  • func NewRegistry() Registry

Functions

func Get

func Get[T any](r Registry, name string) (T, error)

Get will return an instance provided by the Provider mapped to the given name If no provider for the given name exists, or if the instance is not of the type requested an error will be returned

Types

type Provider

type Provider interface {
	Get() any
}

Provider instances return instances of a given type. They may return singletons or a new instance each time

type ProviderF

type ProviderF func() any

ProviderF is a function implementation of the Provider interface

func (ProviderF) Get

func (f ProviderF) Get() any

type Registry

type Registry interface {
	// Register adds a Provider for the given name
	Register(name string, provider Provider)

	// RegisterSingleton adds a Provider which always returns the given instance
	RegisterSingleton(name string, val interface{})

	// GetProvider returns the Provider for the given name, or nil if no Provider has been
	// registered for the given name
	GetProvider(name string) Provider
}

Registry instances store Providers keyed by name

func NewRegistry

func NewRegistry() Registry

NewRegistry returns a new Registry instance