Le cache de second niveau ne fonctionne jamais avec spring3, hibernate4, ehcache?

Question

en utilisant des versions;

<spring.version>3.2.8.RELEASE</spring.version> 
    <hibernate.version>4.2.11.Final</hibernate.version> 

configuration d'hibernation;

... 
<bean id="jpaAdapter" 
     class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" 
     p:database="${jpa.database}" p:showSql="${jpa.showSql}"/> 


<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> 
    <property name="dataSource" ref="dataSource"/> 

    <property name="hibernateProperties"> 
     <props> 
      <prop key="hibernate.hbm2ddl.auto">auto</prop> 
      <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop> 
      <prop key="hibernate.connection.autocommit">true</prop> 

      <prop key="hibernate.cache.use_second_level_cache">true</prop> 
      <prop key="hibernate.cache.use_query_cache">true</prop> 
      <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop> 

      <!--useful for debugging--> 
      <prop key="hibernate.generate_statistics">true</prop> 
     </props> 
    </property> 
    <property name="packagesToScan" value="info.hevi.learn.spring3hibernate4ehcache"/> 
</bean> 

<bean id="transactionManager" 
     class="org.springframework.orm.hibernate4.HibernateTransactionManager"> 
    <property name="sessionFactory" ref="sessionFactory" /> 
</bean> 
... 

configuration ehcache (ehcache.xml);

<cache name="countryCache" 
     maxElementsInMemory="300" 
     eternal="true" 
     overflowToDisk="false" 
     timeToIdleSeconds="12000" 
     timeToLiveSeconds="12000" 
     diskPersistent="false" 
     diskExpiryThreadIntervalSeconds="120" 
     memoryStoreEvictionPolicy="LRU" /> 

<cache name="info.hevi.learn.spring3hibernate4ehcache.domain.Country" 
     maxElementsInMemory="300" 
     eternal="true" 
     overflowToDisk="false" 
     timeToIdleSeconds="12000" 
     timeToLiveSeconds="12000" 
     diskPersistent="false" 
     diskExpiryThreadIntervalSeconds="120" 
     memoryStoreEvictionPolicy="LRU" /> 

classes de domaine;

public class Language implements IEntity { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private Long id; 

    @Column(nullable = false, unique = true) 
    private String name; 
    ... 
} 

et

@Entity 
@Table(name = "countries") 
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE) 
@NamedQueries({ 
     @NamedQuery(name="Country.findLanguagesByCountryId",query="select language from Country country inner join country.languages language where country.id=:cid") 
}) 
public class Country implements IEntity { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private Long id; 

    @Column 
    private String name; 

    @Column 
    private Integer population; 

    @Column(updatable = false, insertable = false) 
    @Temporal(TemporalType.TIMESTAMP) 
    private Calendar creation; 


    @ManyToMany(targetEntity = Language.class, fetch = FetchType.EAGER) 
    @JoinTable(name = "country_language", joinColumns = {@JoinColumn(name = "cid")}, inverseJoinColumns = {@JoinColumn(name = "lid")}) 
    private Set<Language> languages; 
    ... 
} 

et classe de service;

@Service(value = "countryService") 
public class CountryService extends AbstractBasicService<Country, Long, ICountryDao> implements ICountryService { 
... 
    @Override 
    @Cacheable(value = "countryCache") 
    @Transactional 
    public List<Country> getAll() { 
     return super.getAll(); 
    } 
... 
} 

et le code de test;

@Test 
public void testCache() { 

    countryService.getAll(); 
    countryService.getAll(); 
    countryService.getAll(); 

} 

et enfin les statictics;

07-18-2014 02:26:42,991 PM INFO StatisticalLoggingSessionEventListener:275 - Session Metrics { 
    57541 nanoseconds spent acquiring 1 JDBC connections; 
    0 nanoseconds spent releasing 0 JDBC connections; 
    834336 nanoseconds spent preparing 1 JDBC statements; 
    1394341 nanoseconds spent executing 1 JDBC statements; 
    0 nanoseconds spent executing 0 JDBC batches; 
    317686 nanoseconds spent performing 7 L2C puts; 
    0 nanoseconds spent performing 0 L2C hits; 
    0 nanoseconds spent performing 0 L2C misses; 
    655636 nanoseconds spent executing 1 flushes (flushing a total of 11 entities and 7 collections); 
    109408 nanoseconds spent executing 1 partial-flushes (flushing a total of 0 entities and 0 collections) 
} 
07-18-2014 02:26:43,003 PM INFO StatisticalLoggingSessionEventListener:275 - Session Metrics { 
    31202 nanoseconds spent acquiring 1 JDBC connections; 
    0 nanoseconds spent releasing 0 JDBC connections; 
    351321 nanoseconds spent preparing 1 JDBC statements; 
    1095294 nanoseconds spent executing 1 JDBC statements; 
    0 nanoseconds spent executing 0 JDBC batches; 
    281218 nanoseconds spent performing 7 L2C puts; 
    0 nanoseconds spent performing 0 L2C hits; 
    0 nanoseconds spent performing 0 L2C misses; 
    579456 nanoseconds spent executing 1 flushes (flushing a total of 11 entities and 7 collections); 
    11346 nanoseconds spent executing 1 partial-flushes (flushing a total of 0 entities and 0 collections) 
} 
07-18-2014 02:26:43,015 PM INFO StatisticalLoggingSessionEventListener:275 - Session Metrics { 
    23502 nanoseconds spent acquiring 1 JDBC connections; 
    0 nanoseconds spent releasing 0 JDBC connections; 
    366313 nanoseconds spent preparing 1 JDBC statements; 
    695348 nanoseconds spent executing 1 JDBC statements; 
    0 nanoseconds spent executing 0 JDBC batches; 
    274329 nanoseconds spent performing 7 L2C puts; 
    0 nanoseconds spent performing 0 L2C hits; 
    0 nanoseconds spent performing 0 L2C misses; 
    816100 nanoseconds spent executing 1 flushes (flushing a total of 11 entities and 7 collections); 
    8509 nanoseconds spent executing 1 partial-flushes (flushing a total of 0 entities and 0 collections) 
} 

Comme vous pouvez le voir, il ne frappe jamais le cache, tout le temps! J'ai également débogué dans la fonction de service, il exécute réellement la fonction qui n'est pas supposée se produire si c'est vraiment des caches. Qu'est-ce qui ne va pas? Un argument javar me manque-t-il ou fait-il une erreur sémantique?

Answer 1

1. Essayez de supprimer:

   <prop key="hibernate.connection.autocommit">true</prop> 
   

2. Ramassez les statistiques de:

   SessionFactory.getStatistics().getSecondLevelCacheStatistics() 
   

3. Essayez d'obtenir une entité par son id en utilisant

   • Session.get ou de la session Charge:
   • entityManager.find ou entityManager.getReference

   Le chargement de l'entité va au cache de niveau 2er, puis 2ème cache de niveau que pour frapper le db s'il n'y a pas une telle entité déjà chargée

4. Pour les méthodes comme

   countryService.getAll(); 
   

   qui implique le cache de requêtes trop, vous devez activer explicitement le cache de requête pour chaque requête particulière:

   query.setCacheable(true);