org.grouplens.lenskit.core

Annotation Type Shareable

@Documented
@Target(value={TYPE,METHOD})
@Retention(value=RUNTIME)
public @interface Shareable

Mark a component implementation as shareable. Shareable components can be shared between recommender sessions. Things like item-item models should be shareable.

Shareable components must meet the following requirements:

• Be thread-safe
• Be serializable (or externalizable)

Shareable components will be reused as much as possible. If a shareable component has no non-transient non-shareable dependencies, then it will be created once per recommender engine rather than per-recommender.

The Shareable annotation should be on the component implementation, not interface. Alternatively, it can be on the Provider.get() method of a provider to indicate that the objects returned by the provider are shareable.

Compatibility: Public