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POSetting hibernate second level cache
 

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  1. POSetting hibernate second level cache
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    <p>I am new in hibernate and spring and I experiment with hibernate second level cache. But it seems doesn't work. I have a following test class:</p> <pre><code>@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "classpath:applicationContext.xml" }) @TransactionConfiguration @Transactional public class CacheTest extends AbstractTransactionalJUnit4SpringContextTests { @Test public void testCache1() { System.out.println("Running testCache1"); ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); MutableDAO&lt;AppUser&gt; appUserDAO = new MutableDAOImpl&lt;AppUser&gt;(AppUser.class, (SessionFactory) ctx.getBean("OnMediaSessionFactory"), 10); assertNotNull("AppUser DAO is null.", appUserDAO); SessionFactory sessionFactory = (SessionFactory)ctx.getBean("OnMediaSessionFactory"); long numberOfUsers = appUserDAO.countAll(); System.out.println("Number of rows :" + numberOfUsers); final String cacheRegion = AppUser.class.getCanonicalName(); SecondLevelCacheStatistics settingsStatistics = sessionFactory.getStatistics(). getSecondLevelCacheStatistics(cacheRegion); StopWatch stopWatch = new StopWatch(); stopWatch.start(); appUserDAO.findAll(); stopWatch.stop(); System.out.println("Query time : " + stopWatch.getTotalTimeSeconds()); System.out.println(settingsStatistics); } @Test public void testCache2() { System.out.println("Running testCache2"); ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); MutableDAO&lt;AppUser&gt; appUserDAO = new MutableDAOImpl&lt;AppUser&gt;(AppUser.class, (SessionFactory) ctx.getBean("OnMediaSessionFactory"), 10); assertNotNull("AppUser DAO is null.", appUserDAO); SessionFactory sessionFactory = (SessionFactory)ctx.getBean("OnMediaSessionFactory"); long numberOfUsers = appUserDAO.countAll(); System.out.println("Number of rows :" + numberOfUsers); final String cacheRegion = AppUser.class.getCanonicalName(); SecondLevelCacheStatistics settingsStatistics = sessionFactory.getStatistics(). getSecondLevelCacheStatistics(cacheRegion); StopWatch stopWatch = new StopWatch(); stopWatch.start(); appUserDAO.findAll(); stopWatch.stop(); System.out.println("Query time : " + stopWatch.getTotalTimeSeconds()); System.out.println(settingsStatistics); } } </code></pre> <p>and i have</p> <pre><code>&lt;prop key="hibernate.show_sql"&gt;false&lt;/prop&gt; &lt;prop key="hibernate.format_sql"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.use_sql_comments"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.cache.use_query_cache"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.cache.use_second_level_cache"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.generate_statistics"&gt;true&lt;/prop&gt; &lt;prop key="hibernate.cache.use_structured_entries"&gt;true&lt;/prop&gt; </code></pre> <p>but i get output like this:</p> <pre><code>Running testCache1 Number of rows :81 Query time : 0.129 SecondLevelCacheStatistics[hitCount=0,missCount=0,putCount=81,elementCountInMemory=81,elementCountOnDisk=0,sizeInMemory=219634] Running testCache2 Number of rows :81 Query time : 0.063 SecondLevelCacheStatistics[hitCount=0,missCount=0,putCount=81,elementCountInMemory=81,elementCountOnDisk=0,sizeInMemory=219634] </code></pre> <p>what i have to do to get it work ?</p>
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    2. VO
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    1. COThe entity classes themselves have to be made explicitly cacheable - have you done this?
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    2. COyes, i have @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
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