demoSBH

Entity implementation example with hibernate natural id. Use of the natural id allows code simplifications, you don't have to code equals and hashCode methods. Using Lombok further increases the simplification. See en.lba.sbh.commons.AbstEntity. All is here.

Entity example

@NoArgsConstructor
@Getter
@Setter
@AllArgsConstructor()
@EqualsAndHashCode(of = {}, callSuper = true)
@Entity
@NaturalIdCache
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Pet extends AbstEntity {

    private static final long serialVersionUID = -5791061784866523558L;

    @NaturalId
    private String name;

    @ManyToOne
    private Category category;

    private Status status;

}

Run & test

• $ mvn spring-boot:run &
• $ curl -X POST http://localhost:8080/api/pet/get -H 'Content-Type: application/json' -d '{"name":"Rex"}'

i.StatisticalLoggingSessionEventListener : Session Metrics {
    453700 nanoseconds spent acquiring 1 JDBC connections;
    0 nanoseconds spent releasing 0 JDBC connections;
    0 nanoseconds spent preparing 0 JDBC statements;
    0 nanoseconds spent executing 0 JDBC statements;
    0 nanoseconds spent executing 0 JDBC batches;
    0 nanoseconds spent performing 0 L2C puts;
    273900 nanoseconds spent performing 3 L2C hits;
    0 nanoseconds spent performing 0 L2C misses;
    0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
    0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}

• Entity it's easy to write (only functional anotations), and you can saw that no sql statement execution, only cahe hits.