ioc

Documentation

Overview

This package wraps the golobby/container package to provide support for the following: 1. Easier usage of lazy type resolvers and ability to register specific type instances 2. Support for hierarchical/nested containers to resolve types from parent containers 3. Helper methods for easier/streamlined usage of of the IoC container

Index

• Variables
• func RegisterInstance[F any](c *NestedContainer, instance F)
• func RegisterNamedInstance[F any](c *NestedContainer, name string, instance F)
• type NestedContainer
  • func NewNestedContainer(parent *NestedContainer) *NestedContainer
  • func NewRegistrationsOnly(from *NestedContainer) *NestedContainer
  • func (c *NestedContainer) Fill(structure any) error
  • func (c *NestedContainer) Invoke(resolver any) error
  • func (c *NestedContainer) MustRegisterNamedScoped(name string, resolveFn any)
  • func (c *NestedContainer) MustRegisterNamedSingleton(name string, resolveFn any)
  • func (c *NestedContainer) MustRegisterNamedTransient(name string, resolveFn any)
  • func (c *NestedContainer) MustRegisterScoped(resolveFn any)
  • func (c *NestedContainer) MustRegisterSingleton(resolveFn any)
  • func (c *NestedContainer) MustRegisterTransient(resolveFn any)
  • func (c *NestedContainer) NewScope() (*NestedContainer, error)
  • func (c *NestedContainer) NewScopeRegistrationsOnly() (*NestedContainer, error)
  • func (c *NestedContainer) RegisterNamedScoped(name string, resolveFn any) error
  • func (c *NestedContainer) RegisterNamedSingleton(name string, resolveFn any) error
  • func (c *NestedContainer) RegisterNamedTransient(name string, resolveFn any) error
  • func (c *NestedContainer) RegisterScoped(resolveFn any) error
  • func (c *NestedContainer) RegisterSingleton(resolveFn any) error
  • func (c *NestedContainer) RegisterSingletonAndInvoke(resolveFn any) error
  • func (c *NestedContainer) RegisterTransient(resolveFn any) error
  • func (c *NestedContainer) Resolve(instance any) error
  • func (c *NestedContainer) ResolveNamed(name string, instance any) error
• type ServiceLocator

Variables

var (
	ErrResolveInstance error = errors.New("failed resolving instance from container")
)

Functions

func RegisterInstance

func RegisterInstance[F any](c *NestedContainer, instance F)

Registers a constructed instance of the specified type Panics if the registration fails

func RegisterNamedInstance

func RegisterNamedInstance[F any](c *NestedContainer, name string, instance F)

Registers a named constructed instance of the specified type Panics if the registration fails

Types

type NestedContainer

type NestedContainer struct {
	// contains filtered or unexported fields
}

NestedContainer is an IoC container that support nested containers Used for more complex registration scenarios such as scop based registration/resolution.

func NewNestedContainer

func NewNestedContainer(parent *NestedContainer) *NestedContainer

Creates a new nested container from the specified parent container

func NewRegistrationsOnly

func NewRegistrationsOnly(from *NestedContainer) *NestedContainer

Creates a new container with only registrations from the given container.

func (*NestedContainer) Fill

func (c *NestedContainer) Fill(structure any) error

Fill takes a structure and resolves fields with the tag `container:"type" or `container:"name"`.

func (*NestedContainer) Invoke

func (c *NestedContainer) Invoke(resolver any) error

Invokes the specified function and resolves any arguments specified from the container resolver registrations

func (*NestedContainer) MustRegisterNamedScoped

func (c *NestedContainer) MustRegisterNamedScoped(name string, resolveFn any)

Registers a named resolver with a scoped lifetime (instance per scope) Ex: Each new cobra command will create a new scope Scoped registrations are added as singletons in the current container then are reset in any new child containers Panics if the resolver is not valid

func (*NestedContainer) MustRegisterNamedSingleton

func (c *NestedContainer) MustRegisterNamedSingleton(name string, resolveFn any)

Registers a named resolver with a singleton lifetime Panics if the resolver is not valid

func (*NestedContainer) MustRegisterNamedTransient

func (c *NestedContainer) MustRegisterNamedTransient(name string, resolveFn any)

Registers a named resolver with a transient lifetime (instance per resolution) Panics if the resolver is not valid

func (*NestedContainer) MustRegisterScoped

func (c *NestedContainer) MustRegisterScoped(resolveFn any)

Registers a resolver with a scoped lifetime (instance per scope) Ex: Each new cobra command will create a new scope Scoped registrations are added as singletons in the current container then are reset in any new child containers Panics if the resolver is not valid

func (*NestedContainer) MustRegisterSingleton

func (c *NestedContainer) MustRegisterSingleton(resolveFn any)

Registers a resolver with a singleton lifetime Panics if the resolver is not valid

func (*NestedContainer) MustRegisterTransient

func (c *NestedContainer) MustRegisterTransient(resolveFn any)

Registers a named resolver with a singleton lifetime and instantiates the instance Panics if the resolver is not valid

func (*NestedContainer) NewScope

func (c *NestedContainer) NewScope() (*NestedContainer, error)

NewScope creates a new nested container with a relationship back to the parent container Scoped registrations are converted to singleton registrations within the new nested container.

func (*NestedContainer) NewScopeRegistrationsOnly

func (c *NestedContainer) NewScopeRegistrationsOnly() (*NestedContainer, error)

NewScopeRegistrationsOnly creates a new container with bindings deep copied from the container. Scoped registrations are then activated as singletons within the new nested container.

func (*NestedContainer) RegisterNamedScoped

func (c *NestedContainer) RegisterNamedScoped(name string, resolveFn any) error

Registers a named resolver with a scoped lifetime (instance per scope) Ex: Each new cobra command will create a new scope Scoped registrations are added as singletons in the current container then are reset in any new child containers

func (*NestedContainer) RegisterNamedSingleton

func (c *NestedContainer) RegisterNamedSingleton(name string, resolveFn any) error

Registers a named resolver with a singleton lifetime Returns an error if the resolver is not valid

func (*NestedContainer) RegisterNamedTransient

func (c *NestedContainer) RegisterNamedTransient(name string, resolveFn any) error

Registers a named resolver with a transient lifetime (instance per resolution) Returns an error if the resolver is not valid

func (*NestedContainer) RegisterScoped

func (c *NestedContainer) RegisterScoped(resolveFn any) error

Registers a resolver with a scoped lifetime (instance per scope) Ex: Each new cobra command will create a new scope Scoped registrations are added as singletons in the current container then are reset in any new child containers Returns an error if the resolver is not valid

func (*NestedContainer) RegisterSingleton

func (c *NestedContainer) RegisterSingleton(resolveFn any) error

Registers a resolver with a singleton lifetime Returns an error if the resolver is not valid

func (*NestedContainer) RegisterSingletonAndInvoke

func (c *NestedContainer) RegisterSingletonAndInvoke(resolveFn any) error

Registers a resolver with a singleton lifetime and instantiates the instance Instance is stored in container cache is used for future resolutions Returns an error if the resolver cannot instantiate the type

func (*NestedContainer) RegisterTransient

func (c *NestedContainer) RegisterTransient(resolveFn any) error

Registers a resolver with a transient lifetime (instance per resolution) Returns an error if the resolver is not valid

func (*NestedContainer) Resolve

func (c *NestedContainer) Resolve(instance any) error

Resolves an instance for the specified type Returns an error if the resolution fails

func (*NestedContainer) ResolveNamed

func (c *NestedContainer) ResolveNamed(name string, instance any) error

Resolves a named instance for the specified type Returns an error if the resolution fails

type ServiceLocator

type ServiceLocator interface {
	Resolve(instance any) error
	ResolveNamed(name string, instance any) error
	Invoke(resolver any) error
}