• Github
• Description
• Images
• @BindingAnnotation vs @Named
• @BindingAnnotation vs @Qualifier
• toInstance
• Factory

Github

• Guice

Description

• If TypeA is an interface, then, we must have bindings to concrete classes.

bind(TypeA.class).to(ConcreteTypeA.class);

- If TypeA is a concrete class, then, we can bind it to itself.

1. No Bindings
2. Bindings to itself

bind(TypeA.class).to(SubClassOfTypeA.class);

Images


@BindingAnnotation vs @Named

• @BindingAnnotation is a custom annotation that you create.
• @Named is a built-in annotation that comes with Guice.
• They can be used interchangeably.

@BindingAnnotation vs @Qualifier

• @BindingAnnotation is a custom annotation that you create.
• @Qualifier is a built-in annotation that comes with Guice.
• They can be used interchangeably.
• Older code may still use Guice BindingAnnotation in place of the standard Qualifier annotation.
• @Qualifier annotation. New code should use @Qualifier instead.

toInstance

• bind(String.class).toInstance("jdbc:mysql://localhost/pizza");
• bindConstant() is a shortcut for toInstance() for primitive types and strings.

Factory

• medium
• stackoverflow
• https://stackoverflow.com/questions/17669413/can-guice-automatically-create-instances-of-different-classes-based-on-a-paramet

Multibinding & MapBinder & SetBinder & Multibinder

• https://medium.com/@AlexanderObregon/guice-multibindings-leveraging-the-power-of-set-and-map-bindings-6bea4ee247fa
• https://github.com/google/guice/wiki/Multibindings

AssistedInject

• https://www.youtube.com/watch?v=3uAR5sFgh2A&list=PLKiN3faYVq89TjVuba-F62_nKBpcFdOWz&index=2
• Github
• https://toshiyakomoda.medium.com/guice-assistedinject-f49b29105651
• Dagger

Eager

• What's Eager in Guice?
• Eager Singletons are instantiated when the Injector is created.

• https://github.com/google/guice/wiki/Scopes#eager-singletons