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Java 9 Dependency Injection
book

Java 9 Dependency Injection

by Nilang Patel, Krunal Patel
April 2018
Intermediate to advanced content levelIntermediate to advanced
246 pages
6h 11m
English
Packt Publishing
Content preview from Java 9 Dependency Injection

Linked bindings

Linked binding helps to map a type to its implementation. Examples of linked bindings include an interface to its implementation class, and a superclass to a subclass.

Here, NotificationService is bound to the SMSService instance in the ApplicationModule class. This binding affirmation binds an interface to its implementation:

   bind(NotificationService.class).to(SMSService.class);

When we call injector.getInstance(ApplicationModule.class), it will utilize SMSService. If binding to a distinctive implementation of NotificationService, as an EmailService is required, then we only need to essentially alter the binding:

bind(NotificationService.class).to(EmailService.class);

We can even define the link from a type to any of its ...

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Publisher Resources

ISBN: 9781788296250Supplemental Content