Red Hat Training

A Red Hat training course is available for JBoss Enterprise Application Platform Common Criteria Certification

2.4.8. Cache

In order to optimize your database accesses, you can activate the so called second level cache of Hibernate. This cache is configurable on a per entity and per collection basis.
@org.hibernate.annotations.Cache defines the caching strategy and region of a given second level cache. This annotation can be applied on the root entity (not the sub entities), and on the collections.
@Entity
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Forest { ... }
    @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
    @JoinColumn(name="CUST_ID")
    @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
    public SortedSet<Ticket> getTickets() {
        return tickets;
    }
@Cache(
    CacheConcurrencyStrategy usage();    1
    String region() default "";          2
    String include() default "all";      3
)

1

usage: the given cache concurrency strategy (NONE, READ_ONLY, NONSTRICT_READ_WRITE, READ_WRITE, TRANSACTIONAL)

2

region (optional): the cache region (default to the fqcn of the class or the fq role name of the collection)

3

include (optional): all to include all properties, non-lazy to only include non lazy properties (default all).