Annotation Type Lazy

@Retention(CLASS) @Target({TYPE,METHOD}) public @interface Lazy

Constructs this bean the first time something calls it, instead of at start-up.

The build injects a generated subclass that constructs the real bean on the first call and delegates to it. The class must therefore be possible to subclass: not final, with a constructor taking no arguments that the subclass can call.

That constructor runs once at start-up, for the stand-in itself, because a subclass cannot be built without it. So keep it cheap, and put the expensive set-up in a @PostConstruct method: that runs only on the real instance, on first use.

  • Optional Element Summary

    Optional Elements
    Modifier and Type
    Optional Element
    Description
    boolean
    value
    Whether the bean is lazy; false undoes a class-level annotation.

  • Element Details

    • value

      boolean value
      Whether the bean is lazy; false undoes a class-level annotation.
      Default:
      true