Examples with Cache javax.persistence.Cache used on opensource projects

Example 1 with Cache

use of javax.persistence.Cache in project microservices by pwillhan.

the class SecondLevel method cacheControl.

@Test
public void cacheControl() throws Exception {
    CacheTestData testData = storeTestData();
    Long USER_ID = testData.users.getFirstId();
    Long ITEM_ID = testData.items.getFirstId();
    EntityManagerFactory emf = JPA.getEntityManagerFactory();
    Cache cache = emf.getCache();
    assertTrue(cache.contains(Item.class, ITEM_ID));
    cache.evict(Item.class, ITEM_ID);
    cache.evict(Item.class);
    cache.evictAll();
    org.hibernate.Cache hibernateCache = cache.unwrap(org.hibernate.Cache.class);
    assertFalse(hibernateCache.containsEntity(Item.class, ITEM_ID));
    hibernateCache.evictEntityRegions();
    hibernateCache.evictCollectionRegions();
    hibernateCache.evictNaturalIdRegions();
    hibernateCache.evictQueryRegions();
}

Example 2 with Cache

use of javax.persistence.Cache in project microservices by pwillhan.

the class SecondLevel method cacheNaturalId.

@Test
public void cacheNaturalId() throws Exception {
    CacheTestData testData = storeTestData();
    Long USER_ID = testData.users.getFirstId();
    Long ITEM_ID = testData.items.getFirstId();
    UserTransaction tx = TM.getUserTransaction();
    try {
        Statistics stats = JPA.getEntityManagerFactory().unwrap(SessionFactory.class).getStatistics();
        // Clear all natural ID cache regions
        JPA.getEntityManagerFactory().getCache().unwrap(org.hibernate.Cache.class).evictNaturalIdRegions();
        // Clear the User entity cache region
        JPA.getEntityManagerFactory().getCache().evict(User.class);
        {
            tx.begin();
            EntityManager em = JPA.createEntityManager();
            Session session = em.unwrap(Session.class);
            NaturalIdCacheStatistics userIdStats = stats.getNaturalIdCacheStatistics(User.class.getName() + "##NaturalId");
            assertEquals(userIdStats.getElementCountInMemory(), 0);
            User user = (User) session.byNaturalId(User.class).using("username", "johndoe").load();
            // select ID from USERS where USERNAME = ?
            // select * from USERS where ID = ?
            assertNotNull(user);
            assertEquals(userIdStats.getHitCount(), 0);
            assertEquals(userIdStats.getMissCount(), 1);
            assertEquals(userIdStats.getElementCountInMemory(), 1);
            SecondLevelCacheStatistics userStats = stats.getSecondLevelCacheStatistics(User.class.getName());
            assertEquals(userStats.getHitCount(), 0);
            assertEquals(userStats.getMissCount(), 1);
            assertEquals(userStats.getElementCountInMemory(), 1);
            tx.commit();
            em.close();
        }
        {
            // Execute the lookup again, hit the cache
            tx.begin();
            EntityManager em = JPA.createEntityManager();
            Session session = em.unwrap(Session.class);
            /* 
                   The natural identifier cache region for <code>User</code>s
                   has one element.
                 */
            NaturalIdCacheStatistics userIdStats = stats.getNaturalIdCacheStatistics(User.class.getName() + "##NaturalId");
            assertEquals(userIdStats.getElementCountInMemory(), 1);
            /* 
                   The <code>org.hibernate.Session</code> API performs natural
                   identifier lookup; this is the only API for accessing the
                   natural identifier cache.
                 */
            User user = (User) session.byNaturalId(User.class).using("username", "johndoe").load();
            assertNotNull(user);
            /* 
                   You had a cache hit for the natural identifier lookup; the
                   cache returned the identifier value of "johndoe".
                 */
            assertEquals(userIdStats.getHitCount(), 1);
            /* 
                   You also had a cache hit for the actual entity data of
                   that <code>User</code>.
                 */
            SecondLevelCacheStatistics userStats = stats.getSecondLevelCacheStatistics(User.class.getName());
            assertEquals(userStats.getHitCount(), 1);
            tx.commit();
            em.close();
        }
    } finally {
        TM.rollback();
    }
}

Example 3 with Cache

use of javax.persistence.Cache in project OpenOLAT by OpenOLAT.

the class DBImpl method getCacheContainer.

@Override
public EmbeddedCacheManager getCacheContainer() {
    EmbeddedCacheManager cm;
    try {
        Cache cache = emf.getCache();
        JpaInfinispanRegionFactory region = cache.unwrap(JpaInfinispanRegionFactory.class);
        cm = region.getCacheManager();
    } catch (Exception e) {
        log.error("", e);
        cm = null;
    }
    return cm;
}

Example 4 with Cache

use of javax.persistence.Cache in project openolat by klemens.

the class DBImpl method getCacheContainer.

@Override
public EmbeddedCacheManager getCacheContainer() {
    EmbeddedCacheManager cm;
    try {
        Cache cache = emf.getCache();
        JpaInfinispanRegionFactory region = cache.unwrap(JpaInfinispanRegionFactory.class);
        cm = region.getCacheManager();
    } catch (Exception e) {
        log.error("", e);
        cm = null;
    }
    return cm;
}