dependency-injection

问题 lets say I have: public interface Shape {} public class Rectangle implements Shape { } public class Circle implements Shape { } and I have a ApplicationModule which needs to provides instances for both Rec and Circle : @Module public class ApplicationModule { private Shape rec; private Shape circle; public ApplicationModule() { rec = new Rectangle(); circle= new Circle (); } @Provides public Shape provideRectangle() { return rec ; } @Provides public Shape provideCircle() { return circle; } }

问题 lets say I have: public interface Shape {} public class Rectangle implements Shape { } public class Circle implements Shape { } and I have a ApplicationModule which needs to provides instances for both Rec and Circle : @Module public class ApplicationModule { private Shape rec; private Shape circle; public ApplicationModule() { rec = new Rectangle(); circle= new Circle (); } @Provides public Shape provideRectangle() { return rec ; } @Provides public Shape provideCircle() { return circle; } }

问题 I am using asp.net core along with Entity Framework Core . My scenario here is, I want to change the connection string at runtime based on HttpContext query string value. I am trying to pass ResolvedParameter with Reflection components as documented. But, It is not getting registered when I resolve this. Here below, I have attached my code snippet. Autofac Registration class: public class DependencyRegistrar : IDependencyRegistrar { public virtual void Register(ContainerBuilder builder) {

问题 Is it possible to access the instance of a service included on a component decorator providers array from out of its scope? The scope is basically all the children components of the component where it's created, but I'd need to access it from a resolver. I guess there should be some way to get it using the injector, but I'm not sure if the injector has access to the ElementInjector hierarchy. 来源： https://stackoverflow.com/questions/61629924/get-the-instance-of-a-component-provider-out-of-its

问题 Is it possible to access the instance of a service included on a component decorator providers array from out of its scope? The scope is basically all the children components of the component where it's created, but I'd need to access it from a resolver. I guess there should be some way to get it using the injector, but I'm not sure if the injector has access to the ElementInjector hierarchy. 来源： https://stackoverflow.com/questions/61629924/get-the-instance-of-a-component-provider-out-of-its

问题 I cant figure out why I am getting this error below within the RegisterCollection method. Am I doing the setup incorrectly? The container can't be changed after the first call to GetInstance, GetAllInstances, Verify, and some calls of GetRegistration. Please see https://simpleinjector.org/locked to understand why the container is locked. The following stack trace describes the location where the container was locked: Logger registration public static void Register(Container container) {

问题 I have a Xamarin.Forms application where I am using Autofac for DI. SO what I want is quite simple but I am unable to do something which seems like a sinch to do. So I have a class that has two constructors both of them have a single parameter and based on certain conditions I want to resolve either one. As an example, I have a class A and what I want is based on conditions B or C should be resolved. Eg: public class A { public A(B bObject) {...} public A(C cObject) {...} } But I am unable to

问题 I have a Xamarin.Forms application where I am using Autofac for DI. SO what I want is quite simple but I am unable to do something which seems like a sinch to do. So I have a class that has two constructors both of them have a single parameter and based on certain conditions I want to resolve either one. As an example, I have a class A and what I want is based on conditions B or C should be resolved. Eg: public class A { public A(B bObject) {...} public A(C cObject) {...} } But I am unable to

问题 Especially in unittests we use this "design pattern" I call "get class from class level" framworktest.py: class FrameWorkHttpClient(object): .... class FrameWorkTestCase(unittest.TestCase): # Subclass can control the class which gets used in get_response() HttpClient=FrameWorkHttpClient def get_response(self, url): client=self.HttpClient() return client.get(url) mytest.py: class MyHttpClient(FrameWorkHttpClient): .... class MyTestCase(FrameWorkTestCase): HttpClient=MyHttpClient def test

问题 Especially in unittests we use this "design pattern" I call "get class from class level" framworktest.py: class FrameWorkHttpClient(object): .... class FrameWorkTestCase(unittest.TestCase): # Subclass can control the class which gets used in get_response() HttpClient=FrameWorkHttpClient def get_response(self, url): client=self.HttpClient() return client.get(url) mytest.py: class MyHttpClient(FrameWorkHttpClient): .... class MyTestCase(FrameWorkTestCase): HttpClient=MyHttpClient def test