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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

Eager singletons

Guice provides special syntax for making an object that has the singleton scope, and is initialized to eager mode rather than lazy mode. Following is the syntax:

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

Eager singletons uncover initialization issues sooner, and guarantee end users get a reliable, smart encounter. Lazy singletons empower a quicker edit-compile-run development cycle. We can utilize the stage enum to indicate which procedure ought to be utilized.

The following table defines stage-wise use of syntax of the singleton and supported object initialize mode:

Syntax PRODUCTION DEVELOPMENT
@Singleton eager* lazy
.asEagerSingleton() eager eager
.in(Singleton.class) eager lazy ...
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Publisher Resources

ISBN: 9781788296250Supplemental Content