Java Hibernate 5秒级缓存不工作,仍在从数据库中提取
我计划用Hibernate 5实现二级缓存。实体类用@Cacheable注释,并添加了策略CacheConcurrencyStrategy.READ_WRITE。但它仍然在寻找数据库中的数据,而不是缓存 请看我的主要方法Java Hibernate 5秒级缓存不工作,仍在从数据库中提取,java,hibernate,ehcache,Java,Hibernate,Ehcache,我计划用Hibernate 5实现二级缓存。实体类用@Cacheable注释,并添加了策略CacheConcurrencyStrategy.READ_WRITE。但它仍然在寻找数据库中的数据,而不是缓存 请看我的主要方法 public static void main(String[] args) { HolidayDAOImpl holidayImpl = new HolidayDAOImpl(); holidayImpl.setSessionFactory(Hibernate
public static void main(String[] args) {
HolidayDAOImpl holidayImpl = new HolidayDAOImpl();
holidayImpl.setSessionFactory(HibernateUtil.INSTANCE.getSessionFactoryInstance());
holidayImpl.load().forEach(System.out :: println);
System.out.println("Loading second time");
holidayImpl.load().forEach(System.out::println);
}
请参阅HibernateUtil枚举
public enum HibernateUtil{
INSTANCE;
public SessionFactory getSessionFactoryInstance(){
Properties properties = new Properties();
properties.setProperty(Environment.URL, "jdbc:mysql://dummy");
properties.setProperty(Environment.DIALECT, "org.hibernate.dialect.MySQLDialect");
properties.setProperty(Environment.DRIVER, "com.mysql.jdbc.Driver");
properties.setProperty(Environment.USER, "demo");
properties.setProperty(Environment.PASS, "demo");
//second level cache prop
properties.setProperty(Environment.USE_SECOND_LEVEL_CACHE, "true");
properties.setProperty(Environment.USE_QUERY_CACHE, "true");
properties.setProperty(Environment.CACHE_REGION_FACTORY, "org.hibernate.cache.ehcache.EhCacheRegionFactory");
//logging
properties.setProperty("hibernate.show_sql","true");
properties.setProperty("hibernate.format_sql","true");
Configuration cfg = new Configuration();
cfg.setProperties(properties);
cfg.addAnnotatedClass(Holidays.class);
StandardServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();
SessionFactory sessionFactory = cfg.buildSessionFactory(serviceRegistry);
return sessionFactory;
}
}
请参阅DAOImpl类
public List<Holidays> load() {
try (Session session = sessionFactory.openSession()) {
//List<Holidays> result = session.createQuery("from Holidays", Holidays.class).getResultList();
Criteria criteria = session.createCriteria(Holidays.class);
criteria.add(Restrictions.like("holiday_name", "%QA%"));
return criteria.list();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
公共列表加载(){
try(Session Session=sessionFactory.openSession()){
//List result=session.createQuery(“from Holidays”,Holidays.class).getResultList();
条件=session.createCriteria(假日.class);
添加(限制,如“假日名称”,“QA%”);
返回条件。list();
}捕获(例外e){
e、 printStackTrace();
}
返回null;
}
pom.xml
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<version>5.4.1.Final</version>
</dependency>
</dependencies>
mysql
mysql连接器java
8.0.13
org.hibernate
冬眠核心
5.4.1.最终版本
org.hibernate
休眠ehcache
5.4.1.最终版本
在查看一些堆栈溢出问题的答案时,您可以理解在Hibernate的最新版本(在版本4之后)中,配置有一些变化。我不确定我在配置上有没有错
任何人都可以调查一下,并找出为什么它仍然在寻找数据库而不是缓存 要使用hibernate查询缓存,必须在每个查询中添加
setCacheable(true)
如果添加criteria.setCacheable(true)对于DAOImpl类,第二个查询结果来自缓存