org.hibernate.stat.SecondLevelCacheStatistics Java Examples

@GET
@Path("/hibernate-cache/5")
@Produces("application/json")
public String step5_evictAndFindEntity() {
   StringBuilder out = new StringBuilder();

   // Evict entity from cache
   ejb.evictEntity(1L);

   // Reload evicted entity, should come from DB
   // Stats should show a cache miss and a cache put
   ejb.findEntity(1L, out);
   SecondLevelCacheStatistics eventCacheStats = getCacheStatistics(EVENT_REGION_NAME);
   printfAssert("Event entity cache miss: %d (expected %d)%n", eventCacheStats.getMissCount(), 1, out);
   printfAssert("Event entity cache puts: %d (expected %d)%n", eventCacheStats.getPutCount(), 1, out);

   return out.toString();
}
 

/**
 * Prints Hibernate L2 cache statistics to standard output.
 *
 * @param sesFactory Hibernate {@link SessionFactory}, for which to print
 *                   statistics.
 */
private static void printStats(SessionFactory sesFactory) {
    System.out.println("=== Hibernate L2 cache statistics ===");

    for (String entityName : ENTITY_NAMES) {
        System.out.println("\tEntity: " + entityName);

        SecondLevelCacheStatistics stats =
            sesFactory.getStatistics().getSecondLevelCacheStatistics(entityName);

        System.out.println("\t\tPuts: " + stats.getPutCount());
        System.out.println("\t\tHits: " + stats.getHitCount());
        System.out.println("\t\tMisses: " + stats.getMissCount());
    }

    System.out.println("=====================================");
}
 

/**
 * @param sesFactory Session factory.
 * @param idToChildCnt Number of children per entity.
 * @param expHit Expected cache hits.
 * @param expMiss Expected cache misses.
 */
@SuppressWarnings("unchecked")
private void assertCollectionCache(SessionFactory sesFactory, Map<Integer, Integer> idToChildCnt, int expHit,
    int expMiss) {
    sesFactory.getStatistics().clear();

    Session ses = sesFactory.openSession();

    try {
        for (Map.Entry<Integer, Integer> e : idToChildCnt.entrySet()) {
            Entity entity = (Entity)ses.load(Entity.class, e.getKey());

            assertEquals((int)e.getValue(), entity.getChildren().size());
        }
    }
    finally {
        ses.close();
    }

    SecondLevelCacheStatistics stats =
        sesFactory.getStatistics().getSecondLevelCacheStatistics(CHILD_COLLECTION_REGION);

    assertEquals(expHit, stats.getHitCount());

    assertEquals(expMiss, stats.getMissCount());
}
 

/**
 * @param sesFactory Session factory.
 * @param idToChildCnt Number of children per entity.
 * @param expHit Expected cache hits.
 * @param expMiss Expected cache misses.
 */
@SuppressWarnings("unchecked")
private void assertCollectionCache(SessionFactory sesFactory, Map<Integer, Integer> idToChildCnt, int expHit,
    int expMiss) {
    sesFactory.getStatistics().clear();

    Session ses = sesFactory.openSession();

    try {
        for (Map.Entry<Integer, Integer> e : idToChildCnt.entrySet()) {
            Entity entity = (Entity)ses.load(Entity.class, e.getKey());

            assertEquals((int)e.getValue(), entity.getChildren().size());
        }
    }
    finally {
        ses.close();
    }

    SecondLevelCacheStatistics stats =
        sesFactory.getStatistics().getSecondLevelCacheStatistics(CHILD_COLLECTION_REGION);

    assertEquals(expHit, stats.getHitCount());

    assertEquals(expMiss, stats.getMissCount());
}
 

@GET
@Path("/hibernate-cache/13")
@Produces("application/json")
public String step13_findExpiredEntity() throws Exception {
   StringBuilder out = new StringBuilder();

   // Wait long enough for entity to be expired from cache
   Thread.sleep(1100);

   // Find expiring entity, after expiration entity should come from DB
   // Stats should show a cache miss and a cache put
   ejb.findExpiringEntity(4L, out);
   SecondLevelCacheStatistics personCacheStats = getCacheStatistics(PERSON_REGION_NAME);
   printfAssert("Person entity cache miss: %d (expected %d)%n", personCacheStats.getMissCount(), 1, out);
   printfAssert("Person entity cache put: %d (expected %d)%n", personCacheStats.getPutCount(), 1, out);

   return out.toString();
}
 

@GET
@Path("/hibernate-cache/1")
@Produces("application/json")
public String step1_persistEntities() {
   // Persist 3 entities, stats should show 3 second level cache puts
   ejb.persistEntities();
   SecondLevelCacheStatistics eventCacheStats = getCacheStatistics(EVENT_REGION_NAME);
   return printfAssert("Event entity cache puts: %d (expected %d)%n", eventCacheStats.getPutCount(), 3);
}
 

private void setMemoryInfo(Model model) {
    //系统的
    MemoryUsage heapMemoryUsage = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
    long usedSystemMemory = heapMemoryUsage.getUsed();
    long maxSystemMemory = heapMemoryUsage.getMax();
    model.addAttribute("usedSystemMemory", usedSystemMemory);
    model.addAttribute("maxSystemMemory", maxSystemMemory);

    //二级缓存的
    Statistics statistics = (Statistics) model.asMap().get("statistics");
    String[] secondLevelCacheRegionNames = statistics.getSecondLevelCacheRegionNames();

    int totalMemorySize = 0;
    int totalMemoryCount = 0;
    int totalDiskCount = 0;

    for(String secondLevelCacheRegionName : secondLevelCacheRegionNames) {
        SecondLevelCacheStatistics secondLevelCacheStatistics =
                statistics.getSecondLevelCacheStatistics(secondLevelCacheRegionName);
        totalMemorySize += secondLevelCacheStatistics.getSizeInMemory();
        totalMemoryCount += secondLevelCacheStatistics.getElementCountInMemory();
        totalDiskCount += secondLevelCacheStatistics.getElementCountOnDisk();
    }

    model.addAttribute("totalMemorySize", totalMemorySize);
    model.addAttribute("totalMemoryCount", totalMemoryCount);
    model.addAttribute("totalDiskCount", totalDiskCount);
}
 

@Test
public void shouldCacheUserOnFind() {
    User first = new User("first");
    first.addNotificationFilter(new NotificationFilter("pipline", "stage1", StageEvent.Fails, true));
    first.addNotificationFilter(new NotificationFilter("pipline", "stage2", StageEvent.Fails, true));
    int originalUserCacheSize = sessionFactory.getStatistics().getSecondLevelCacheStatistics(User.class.getCanonicalName()).getEntries().size();
    int originalNotificationsCacheSize = sessionFactory.getStatistics().getSecondLevelCacheStatistics(User.class.getCanonicalName() + ".notificationFilters").getEntries().size();
    userDao.saveOrUpdate(first);
    long userId = userDao.findUser("first").getId();
    assertThat(sessionFactory.getStatistics().getSecondLevelCacheStatistics(User.class.getCanonicalName()).getEntries().size(), is(originalUserCacheSize + 1));
    SecondLevelCacheStatistics notificationFilterCollectionCache = sessionFactory.getStatistics().getSecondLevelCacheStatistics(User.class.getCanonicalName() + ".notificationFilters");
    assertThat(notificationFilterCollectionCache.getEntries().size(), is(originalNotificationsCacheSize + 1));
    assertThat(notificationFilterCollectionCache.getEntries().get(userId), is(Matchers.notNullValue()));
}
 

protected SecondLevelCacheStatistics getCacheStats(String region) {
	SecondLevelCacheStatistics stats = getSessionFactory().getStatistics().getSecondLevelCacheStatistics(region);
	if (stats == null){
		LOGGER.warn("No such cache:  " + region);
	}
	return stats;
}
 

protected void printEntityCacheStats(String region, boolean printEntries) {
	SecondLevelCacheStatistics stats = getCacheStats(region);
	LOGGER.info(region + " Stats:  \n\n\t" + stats + "\n");
	if (printEntries) {
		@SuppressWarnings("rawtypes")
		Map cacheEntries = stats.getEntries();
		LOGGER.info(Arrays.toString(cacheEntries.entrySet().toArray()));
	}
}
 

public void testEmptySecondLevelCacheEntry() throws Exception {
	getSessions().evictEntity( Item.class.getName() );
	Statistics stats = getSessions().getStatistics();
	stats.clear();
	SecondLevelCacheStatistics statistics = stats.getSecondLevelCacheStatistics( Item.class.getName() );
       Map cacheEntries = statistics.getEntries();
	assertEquals( 0, cacheEntries.size() );
}
 

@GET
@Path("/hibernate-cache/12")
@Produces("application/json")
public String step12_findExpiringEntity() {
   StringBuilder out = new StringBuilder();

   // Find expiring entity, stats should show a second level cache hit
   ejb.findExpiringEntity(4L, out);
   SecondLevelCacheStatistics personCacheStats = getCacheStatistics(PERSON_REGION_NAME);
   printfAssert("Person entity cache hits: %d (expected %d)%n", personCacheStats.getHitCount(), 1, out);

   return out.toString();
}
 

@GET
@Path("/hibernate-cache/11")
@Produces("application/json")
public String step11_persistExpiringEntity() {
   StringBuilder out = new StringBuilder();

   // Save cache-expiring entity, stats should show a second level cache put
   ejb.persistExpiringEntity();
   SecondLevelCacheStatistics personCacheStats = getCacheStatistics(PERSON_REGION_NAME);
   printfAssert("Person entity cache puts: %d (expected %d)%n", personCacheStats.getPutCount(), 1, out);

   return out.toString();
}
 

@GET
@Path("/hibernate-cache/9")
@Produces("application/json")
public String step9_updateEntity() {
   StringBuilder out = new StringBuilder();

   // Update one of the persisted entities, stats should show a cache hit and a cache put
   ejb.updateEntity(2L, out);
   SecondLevelCacheStatistics eventCacheStats = getCacheStatistics(EVENT_REGION_NAME);
   printfAssert("Event entity cache hits: %d (expected %d)%n", eventCacheStats.getHitCount(), 1, out);
   printfAssert("Event entity cache puts: %d (expected %d)%n", eventCacheStats.getPutCount(), 1, out);

   return out.toString();
}
 

@GET
@Path("/hibernate-cache/6")
@Produces("application/json")
public String step6_deleteEntity() {
   StringBuilder out = new StringBuilder();

   // Remove cached entity, stats should show a cache hit
   ejb.deleteEntity(1L, out);
   SecondLevelCacheStatistics eventCacheStats = getCacheStatistics(EVENT_REGION_NAME);
   printfAssert("Event entity cache hits: %d (expected %d)%n", eventCacheStats.getHitCount(), 1, out);

   return out.toString();
}
 

@GET
@Path("/hibernate-cache/3")
@Produces("application/json")
public String step3_updateEntity() {
   StringBuilder out = new StringBuilder();

   // Update one of the persisted entities, stats should show a cache hit and a cache put
   ejb.updateEntity(1L, out);
   SecondLevelCacheStatistics eventCacheStats = getCacheStatistics(EVENT_REGION_NAME);
   printfAssert("Event entity cache hits: %d (expected %d)%n", eventCacheStats.getHitCount(), 1, out);
   printfAssert("Event entity cache puts: %d (expected %d)%n", eventCacheStats.getPutCount(), 1, out);

   return out.toString();
}
 

@GET
@Path("/hibernate-cache/2")
@Produces("application/json")
public String step2_findEntity() {
   StringBuilder out = new StringBuilder();

   // Find one of the persisted entities, stats should show a cache hit
   ejb.findEntity(1L, out);
   SecondLevelCacheStatistics eventCacheStats = getCacheStatistics(EVENT_REGION_NAME);
   printfAssert("Event entity cache hits: %d (expected %d)%n", eventCacheStats.getHitCount(), 1, out);

   return out.toString();
}
 

private SecondLevelCacheStatistics getCacheStatistics(String regionName) {
   return emf.unwrap(SessionFactory.class).getStatistics()
      .getSecondLevelCacheStatistics(regionName);
}
 

/**
 * @see StatisticsServiceMBean#getSecondLevelCacheStatistics(java.lang.String)
 */
public SecondLevelCacheStatistics getSecondLevelCacheStatistics(String regionName) {
	return stats.getSecondLevelCacheStatistics(regionName);
}
 

private SecondLevelCacheStatistics getCacheStatistics(String regionName) {
   return em.unwrap(Session.class).getSessionFactory().getStatistics()
      .getSecondLevelCacheStatistics(regionName);
}
 

protected void printQueryCacheStats(String region) {
	SecondLevelCacheStatistics stats = getCacheStats(region);
	LOGGER.info(region + " Stats:  \n\n\t" + stats + "\n");
}
 

public SecondLevelCacheStatistics getSecondLevelCacheStatistics(
        String regionName) {
    return null;
}
 

private static SecondLevelCacheStatistics getCacheStatistics(String regionName) {
   return emf.unwrap(SessionFactory.class).getStatistics()
         .getSecondLevelCacheStatistics(regionName);
}