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Container Configuration

To configure fairy's container, we provide an annotation-based approach to configure the container. The container configuration can be done in multiple ways.

Annotations​

@InjectableComponent​

The @InjectableComponent is one of the most important annotations in fairy. It is used to mark a class as a component that can be injected into other components. The @InjectableComponent annotation can be used to mark a class as a component that can be injected into other components.

@InjectableComponent
public class MyComponent {
    // ...
}

@Configuration​

The @Configuration annotation is used to mark a class as a configuration class. Configuration classes are used to define components and their dependencies using annotated method approach. You can define multiple components in a single configuration class.

@Configuration
public class MyConfiguration {
    
    @InjectableComponent
    public MyComponent myComponent() {
        return new MyComponent();
    }
    
}

// No longer need to use @InjectableComponent annotation when it's defined in a configuration class.
public class MyComponent {
    // ...
}