Injectable Singleton

From APIDesign

Singletons are sometimes dishonest as a design anti-pattern. Right, one may use them improperly, but with guidance of proper methodology there is nothing wrong on singletons. This page provides step by step cook book for usage of so called Injected Singletons.

Contents 1 What this is not 2 Configure 3 Testability 4 Injectable Meta-Singleton

What this is not

TBD. Not about SecurityManager, URLStreamHandlerFactory, etc.

Configure

TBD. Drop-in your implementations to classpath.

Testability

TBD. Use MockServices

• mention testing limitations due to levels of Co-existence and solutions

Injectable Meta-Singleton

• Lookup is meta!