Spring 3.2.1.RELEASE MVC 基于注解ehcache.xml 配置方式
载的关联包里的ehcache-spring-annotations.jar之外,还需要spring-context-support.jar,cblib-2.2.jar.
<dependency> <groupId>com.googlecode.ehcache-spring-annotations</groupId> <artifactId>ehcache-spring-annotations</artifactId> <version>1.2.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>3.2.1.RELEASE</version> </dependency>
Spring3.0.5MVC基于注解ehcache.xml配置方式http://www.blogjava.net/zzzlyr/articles/343234.html
spring3.0.5发布后,公司使用SpringMVC+Hibernate3.5做项目,其中用到了缓存机制,spring3.0.5中ehcache配置方法很简单,其中缓存机制很细颗粒化,可以具体到把每个方式的返回值做缓存,好了不说废话下面开始:
需要JAR包:
第一:spring3.0.5其中JAR;
第二:另外需要增量JAR包(cglib-2.2.jar,ehcache-spring-annotations-1.1.2.jar)注意版本;
其中applicationContext.xml其中配置:
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:ehcache="http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-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-3.0.xsd http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring/ehcache-spring-1.1.xsd"> <ehcache:annotation-driven cache-manager="ehCacheManager" /> <bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:ehcache.xml" /> </bean>
加到你的文件中去,上边是头信息自己可以比照下,没有的加进去;
在你的src目录下新建ehcache.xml内容如下:
<?xml version="1.0" encoding="UTF-8"?> <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd" updateCheck="false"> <diskStore path="java.io.tmpdir" /> <defaultCache eternal="false" maxElementsInMemory="1000" overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0" timeToLiveSeconds="600" memoryStoreEvictionPolicy="LRU" /> <cache name="departCache" eternal="false" maxElementsInMemory="100" overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0" timeToLiveSeconds="300" memoryStoreEvictionPolicy="LRU" /> </ehcache>
其中里边详细配置自己可以去上网搜下;
这样基本上配置完成了:
DAO层缓存:例如下边这个方法的返回值需要缓存:
@SuppressWarnings("unchecked") //spring 3 基于注解ehcache缓存配置; @Cacheable(cacheName="departCache") public List<AppDepart> getChildDepart(Integer id) throws Exception { return this.getHibernateTemplate().find("from AppDepart where state=1 and idParent="+id); }
@Cacheable(cachename="departCache")加上这句话,其中cacheName对应ehcache.xml中的<cachename="departCache"
这样这个方法返回值就可以被缓存起来的了,但是怎么样把缓存数据和数据库中的数据实现同步呢?
如果对这个PO做update,save,delete可以实现这样策略如下:
@Transactional(propagation = Propagation.REQUIRED) //设定spring的ecache缓存策略,当编辑机构时候,把缓存全部清除掉,以达到缓存那数据同步; @TriggersRemove(cacheName="departCache",removeAll=true) public boolean editDepart(String depno, String depName) { boolean flag = false; try { AppDepart depart = departDao.getAppdepart(depno); depart.setDepName(depName); departDao.update(depart); flag = true; } catch (Exception e) { e.printStackTrace(); } return flag; }
好了到此配置完毕,但是更加详细缓存配置策略需要研究(例如:当update数据时候,不全部清掉缓存,就可以达到与数据库同步效果)
[url]以下配置经本人完成测试通过(只限于本版本)。
编写测试类
packagecom.dzf.cache;
importorg.springframework.stereotype.Service;
importorg.springframework.transaction.annotation.Transactional;
importcom.googlecode.ehcache.annotations.Cacheable;
importcom.googlecode.ehcache.annotations.TriggersRemove;
@Service
@Transactional
publicclassCacheService{
@Cacheable(cachename="testCache")
publicStringgetName(inti){
System.out.println("ProcessingtestCache");
return"nihao:"+i;
}
@TriggersRemove(cachename="testCache")
publicvoidflush(){
System.out.println("ProcessingtestFlushing");
}
}
很容易就把cache给管理起来了。相当的方便。
碰到问题:当在Hibernate也使用缓存的时候
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" p:packagesToScan="com.pandy.ssh4.domian"> <property name="dataSource"> <ref bean="dataSource" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.SQLServer2008Dialect </prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.cache.use_query_cache">true</prop> <prop key="hibernate.cache.use_second_level_cache">true</prop> <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory </prop> <prop key="hibernate.cache.use_structured_entries">true</prop> <prop key="hibernate.generate_statistics">true</prop> </props> </property> </bean>
会出现AnotherunnamedCacheManageralreadyexistsinthesameVM错误,又如何解决呢?
有必要在spring和hibernate都配置ehcache缓存么?
一个是针对数据库缓存,一个是针对业务数据缓存.