groovy.lang

Annotation Type Singleton

@Documented
@Retention(value=SOURCE)
@Target(value=TYPE)
public @interface Singleton

Class annotation to make class singleton. Singleton can be initialized in static initialization of the class or lazily (on first access) To make singleton lazy it is enough to use @Singleton(lazy=true) Lazy singletons implemented with double check locking and volatile field

Author:

Alex Tkachman

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
boolean	lazy
String	property

Element Detail

lazy

public abstract boolean lazy

Returns:

if this singleton should be lazy

Default:

false

property

public abstract String property

Returns:

the singleton property name

Default:

"instance"