Can we do dependency injection in interface?
Can we do dependency injection in interface?
There are basically three types of dependency injection: interface injection: the dependency provides an injector method that will inject the dependency into any client passed to it. Clients must implement an interface that exposes a setter method that accepts the dependency.
Does dependency injection need interface?
No, you don’t need interfaces for dependency injection. But dependency injection is much more useful with them! As you noticed, you can register concrete types with the service collection and ASP.NET Core will inject them into your classes without problems.
How does interface help dependency injection?
The dependency injection technique. You can introduce interfaces to break the dependencies between higher and lower level classes. If you do that, both classes depend on the interface and no longer on each other.
Which is the right way to inject dependency in Java?
The injector class injects dependencies broadly in three ways: through a constructor, through a property, or through a method. Constructor Injection: In the constructor injection, the injector supplies the service (dependency) through the client class constructor.
What is interface injection?
Interface Injection is similar to Getter and Setter DI, the Getter, and Setter DI use default getter and setter but Interface Injection uses support interface a kind of explicit getter and setter which sets the interface property.
What is @inject in Java?
A method annotated with @Inject that overrides another method annotated with @Inject will only be injected once per injection request per instance. A method with no @Inject annotation that overrides a method annotated with @Inject will not be injected. Injection of members annotated with @Inject is required.
What does @inject do in Java?
Injectable constructors are annotated with @Inject and accept zero or more dependencies as arguments. @Inject can apply to at most one constructor per class. @Inject is optional for public, no-argument constructors when no other constructors are present. This enables injectors to invoke default constructors.
Can an interface be Autowired?
In a typical enterprise application, it is very common that you define an interface with multiple implementations. If you try to use @Autowired on an interface, the Spring framework would throw an exception as it won’t be able to decide which implementation class to use.
When should I use dependency injection?
More specifically, dependency injection is effective in these situations:
- You need to inject configuration data into one or more components.
- You need to inject the same dependency into multiple components.
- You need to inject different implementations of the same dependency.
