Play Framework dependency identification for vs @Singleton Class object

Question

Play Framework 2.4 supports Google Guice Dependency Injection support

What is the advantage of using

@Singleton class A

instead

object A

for singletons?

Answer 1

I see three advantages of using @Singleton classover objectif A has no dependencies:

• If you want to test Aand declare it as @Singleton class, you have the opportunity to subclass it to extract some functions in your test, while this is not possible with object.

• object, , A , , @Singleton class , A , , .

• A, , @Singleton class.

A , @Singleton class , , (: a var getter/ ).