Class DependencyResolver

Provides users with immediate access to the IDependencyResolver bound to this ActorSystem, if any.

Inheritance

Object

DependencyResolver

Implements

IExtension

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: Akka.DependencyInjection

Assembly: Akka.DependencyInjection.dll

Syntax

public sealed class DependencyResolver : IExtension

Constructors

DependencyResolver(IDependencyResolver)

Declaration

public DependencyResolver(IDependencyResolver resolver)

Parameters

Type	Name	Description
IDependencyResolver	resolver

Properties

Resolver

The globally scoped IDependencyResolver.

Declaration

public IDependencyResolver Resolver { get; }

Property Value

Type	Description
IDependencyResolver

Remarks

Per https://docs.microsoft.com/en-us/dotnet/core/extensions/dependency-injection-guidelines - please use the appropriate Microsoft.Extensions.DependencyInjection.IServiceScope for your actors and the dependencies they consume. DI is typically not used for long-lived, stateful objects such as actors.

Therefore, injecting transient dependencies via constructors is a bad idea in most cases. You'd be far better off creating a local "request scope" each time your actor processes a message that depends on a transient dependency, such as a database connection, and disposing that scope once the operation is complete.

Actors are not MVC Controllers. Actors can live forever, have the ability to restart, and are often stateful. Be mindful of this as you use this feature or bad things will happen. Akka.NET does not magically manage scopes for you.

Methods

For(ActorSystem)

Declaration

public static DependencyResolver For(ActorSystem actorSystem)

Parameters

Type	Name	Description
ActorSystem	actorSystem

Returns

Type	Description
DependencyResolver

Props(Type)

Used to dynamically instantiate an actor where some of the constructor arguments are populated via dependency injection and others are not.

Declaration

public Props Props(Type type)

Parameters

Type	Name	Description
Type	type	The type of actor to instantiate.

Returns

Type	Description
Props	A new Props instance which uses DI internally.

Remarks

YOU ARE RESPONSIBLE FOR MANAGING THE LIFECYCLE OF YOUR OWN DEPENDENCIES. AKKA.NET WILL NOT ATTEMPT TO DO IT FOR YOU.

Props(Type, Object[])

Used to dynamically instantiate an actor where some of the constructor arguments are populated via dependency injection and others are not.

Declaration

public Props Props(Type type, params object[] args)

Parameters

Type	Name	Description
Type	type	The type of actor to instantiate.
Object[]	args	Optional. Any constructor arguments that will be passed into the actor's constructor directly without being resolved by DI first.

Returns

Type	Description
Props	A new Props instance which uses DI internally.

Remarks

YOU ARE RESPONSIBLE FOR MANAGING THE LIFECYCLE OF YOUR OWN DEPENDENCIES. AKKA.NET WILL NOT ATTEMPT TO DO IT FOR YOU.

Props<T>()

Used to dynamically instantiate an actor where some of the constructor arguments are populated via dependency injection and others are not.

Declaration

public Props Props<T>()
    where T : ActorBase

Returns

Type	Description
Props	A new Props instance which uses DI internally.

Type Parameters

Name	Description
T	The type of actor to instantiate.

Remarks

YOU ARE RESPONSIBLE FOR MANAGING THE LIFECYCLE OF YOUR OWN DEPENDENCIES. AKKA.NET WILL NOT ATTEMPT TO DO IT FOR YOU.

Props<T>(Object[])

Uses a delegate to dynamically instantiate an actor where some of the constructor arguments are populated via dependency injection and others are not.

Declaration

public Props Props<T>(params object[] args)
    where T : ActorBase

Parameters

Type	Name	Description
Object[]	args	Optional. Any constructor arguments that will be passed into the actor's constructor directly without being resolved by DI first.

Returns

Type	Description
Props	A new Props instance which uses DI internally.

Type Parameters

Name	Description
T	The type of actor to instantiate.

Remarks

YOU ARE RESPONSIBLE FOR MANAGING THE LIFECYCLE OF YOUR OWN DEPENDENCIES. AKKA.NET WILL NOT ATTEMPT TO DO IT FOR YOU.

Implements

IExtension

Extension Methods

ObjectExtensions.IsDefaultForType<T>(T)

ObjectExtensions.AsOption<T>(T)

Extensions.AsInstanceOf<T>(Object)