org.apache.ignite.lang

Annotation Type IgniteImmutable

@Documented
@Retention(value=RUNTIME)
@Target(value=TYPE)
public @interface IgniteImmutable

Immutable types should be annotated with this annotation to avoid unnecessary copying (e.g. in case of stateless compute closures or cache values).

If cache configuration flag CacheConfiguration.isCopyOnRead() is set then for each operation implying return value copy of the value stored in cache is created. Also if this flag is set copies are created for values passed to CacheInterceptor and to CacheEntryProcessor.

Copies are not created for types marked with IgniteImmutable annotation and for known immutable types:

• Boxed primitives (Integer, Long, ...)
• String
• UUID
• BigDecimal
• IgniteUuid