我正在尝试在具有以下依赖项的Spring Data和Hibernate环境中缓存查询，但并未成功：
compile 'org.hibernate:hibernate-validator:4.0.0.GA'
compile 'org.hibernate:hibernate-entitymanager:3.6.6.Final'
compile 'org.hibernate.javax.persistence:hibernate-jpa-2.0-api:1.0.0.Final'
compile 'org.hibernate:hibernate-ehcache:3.3.1.GA'
compile 'org.springframework.data:spring-data-jpa:1.2.0.RELEASE'
我的Spring Data Repository(ServiceRepository)用于服务实体
public interface ServiceRepository extends CrudRepository<Service, Long>, JpaSpecificationExecutor<Service> {
@Cacheable("merchantServices")
@Query("select s from Service s JOIN s.statusList sas where s.status=?1 and s.priviligedUser.priviligedUserType IN (2,4) and (s.id IN (select st.id from Service st inner join st.tags tag where tag IN (?3)) or s.serviceType IN (?2)) and sas.active=true and sas.transactorType=?4 ORDER BY s.name")
List<Service> getAllMerchantServicesByStatusTypeAndTags(ServiceStatus status, List<ServiceType> type, List<String> tags, TransactorType transactor);
}
从缓存中调用仓库的@Cacheable方法
public List<Service> getAllServicesByStatusAndId(ServiceStatus status, List<Long> services, TransactorType transactor) {
return serviceRepository.getAllMerchantServicesByStatusAndServiceId(status, services, transactor);
}
我的缓存配置（jpa-context.xml）如下：
它的灵感来自于spring-data-jpa-examples/src/main/resources/caching-repository-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns:p="http://www.springframework.org/schema/p"
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd"
default-autowire="byName">
<tx:annotation-driven />
<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
<property name="caches">
<set>
<bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" p:name="merchantServices"/>
</set>
</property>
</bean>
</beans>
启用缓存的 Hibernate 配置 (hibernate.cfg.xml) 为
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.default_batch_fetch_size">16</property>
<property name="hibernate.max_fetch_depth">5</property>
<property name="hibernate.cache.use_query_cache">true</property>
<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.generate_statistics">true</property>
<property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="hibernate.c3p0.timeout">300</property>
</session-factory>
</hibernate-configuration>
查看日志，每次请求时都会执行查询。
17:50:28.997 [http-bio-8080-exec-10] INFO org.hibernate.stat.Statistics - HQL: select s from Service s JOIN s.statusList sas where s.status=?1 and s.priviligedUser.priviligedUserType IN (2,4) and s.id IN (?2) and sas.active=true and sas.transactorType=?3 ORDER BY s.name, time: 57ms, rows: 1
下一次请求时，我看到以下查询：
18:03:40.374 [http-bio-8080-exec-8] INFO org.hibernate.stat.Statistics - HQL: select s from Service s JOIN s.statusList sas where s.status=?1 and s.priviligedUser.priviligedUserType IN (2,4) and s.id IN (?2) and sas.active=true and sas.transactorType=?3 ORDER BY s.name, time: 47ms, rows: 1