在Hibernate中使用Memcached作为一个二级分布式缓存

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"" target="_new">http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

<persistence-unit name="entityManager" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:comp/env/jdbc/qualitydb</jta-data-source>

<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.max_fetch_depth" value="3" />
<property name="hibernate.show_sql" value="true" />


<property name="hibernate.cache.region_prefix" value="quality.cache.ehcache"/>
<property name="hibernate.cache.use_second_level_cache" value="true"/>
<property name="hibernate.cache.use_structured_entries" value="true"/>
<property name="hibernate.cache.use_query_cache" value="true"/>
<property name="hibernate.cache.provider_class" value="com.googlecode.hibernate.memcached.MemcachedCacheProvider"/>
<property name="hibernate.memcached.servers" value="localhost:11211"/>

</properties>

</persistence-unit>

</persistence>

 1 @Entity
 2 @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)//设置要求缓存
 3 public class Student {
 4 
 5   @Id
 6   @Column(length=32)
 7     private String id;
 8     
 9     @Column(length=20)
10     private string name;
11     
12     @OneToMany
13     @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
14     private Set<Book> books;
15 
16 }