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

Optional Element Summary

boolean	lazy
java.lang.String	property

lazy

public abstract boolean lazy

Returns:

if this singleton should be lazy

Default:

false

property

public abstract java.lang.String property

Returns:

the singleton property name

Default:

"instance"