Created
January 7, 2020 20:44
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Example of Autofac dependency injection functional helpers to use into composition manner
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| module DependencyUtils | |
| open Autofac | |
| open Microsoft.Extensions.Configuration | |
| let addTransientAs<'service, 'implementation> (services: ContainerBuilder) = | |
| services.RegisterType<'implementation>().As<'service>() |> ignore | |
| services | |
| let addScopedAs<'service, 'implementation> (services: ContainerBuilder) = | |
| services.RegisterType<'implementation>().As<'service>().InstancePerLifetimeScope() |> ignore | |
| services | |
| let addSingletonAs<'service, 'implementation> (services: ContainerBuilder) = | |
| services.RegisterType<'implementation>().As<'service>().SingleInstance() |> ignore | |
| services | |
| let addSingletonFactory<'service> (factory: IComponentContext -> 'service) (services: ContainerBuilder) = | |
| services.Register(factory).As<'service>().SingleInstance() |> ignore | |
| services | |
| let addTransientNamedAs<'service, 'implementation> name (services: ContainerBuilder) = | |
| services.RegisterType<'implementation>().As<'service>().Named(name) |> ignore | |
| services | |
| let addScopedNamedAs<'service, 'implementation> name (services: ContainerBuilder) = | |
| services.RegisterType<'implementation>().As<'service>().Named(name).InstancePerLifetimeScope() |> ignore | |
| services | |
| let addSingletonNamedAs<'service, 'implementation> name (services: ContainerBuilder) = | |
| services.RegisterType<'implementation>().As<'service>().Named(name).SingleInstance() |> ignore | |
| services | |
| let addSingletonNamedFactory<'service> (factory: IComponentContext -> 'service) (name: string) (services: ContainerBuilder) = | |
| services.Register(factory).As<'service>().Named(name).SingleInstance() |> ignore | |
| services | |
| let addTransient<'service> = | |
| addTransientAs<'service, 'service> | |
| let addScoped<'service> = | |
| addScopedAs<'service, 'service> | |
| let addSingleton<'service> = | |
| addSingletonAs<'service, 'service> | |
| let addTransientNamed<'service> = | |
| addTransientNamedAs<'service, 'service> | |
| let addScopedNamed<'service> = | |
| addScopedNamedAs<'service, 'service> | |
| let addSingletonNamed<'service> = | |
| addSingletonNamedAs<'service, 'service> | |
| let addSingletonInstance<'service when 'service : not struct> (instance: 'service) (services: ContainerBuilder) = | |
| services.RegisterInstance(instance) |> ignore | |
| services | |
| // Container module boilerplate to register from register function below. Used in Startup as entry point | |
| // for injection | |
| type DependenciesModule(register : IConfiguration -> ContainerBuilder -> ContainerBuilder, configuration: IConfiguration) = | |
| inherit Module() | |
| override __.Load(builder: ContainerBuilder) = | |
| register configuration builder |> ignore | |
| let makeModule register configuration = DependenciesModule(register, configuration) | |
| let addModule module' (builder: ContainerBuilder) = | |
| builder.RegisterModule(module') |> ignore | |
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| // Example of using | |
| // ... | |
| open DependencyUtils | |
| // ... | |
| let register configuration = | |
| addSingletonNamedFactory<IService2> (fun _ -> someFactory2 configuration) "Some cool name" | |
| >> addSingletoFactory<IService3> (fun _ -> someFactory3 configuration) | |
| >> addTransientNamedAs<IService, Service> "Some name" | |
| member this.ConfigureContainer(builder: ContainerBuilder) = | |
| let module' = makeModule register this.Configuration | |
| builder |> addModule module' |
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