Spring基于注解的缓存配置--EHCache AND OSCache

 

一.简介
在spring的modules包中提供对许多第三方缓存方案的支持,包括:
EHCache
OSCache(OpenSymphony)
JCS
GigaSpaces
JBoss Cache
等等。
将这些第三方缓存方案配置在spring中很简单,网上有许多介绍,这里只重点介绍如何配置基于注解的缓存配置。
本文将通过例举EHCache和OSCache详细介绍如何使用spring配置基于注解的缓存配置,注意这里的缓存是方法级的。

二.依赖
在开始介绍如何进行缓存配置前先介绍一下EHCache和OSCache的jar依赖。
EHCache:
ehcache-core-1.7.2.jar
jakarta-oro-2.0.8.jar
slf4j-api-1.5.8.jar
slf4j-jdk14-1.5.8.jar

OSCache:
oscache-2.4.1.jar

此外,两者都需要的jar如下:
cglib-nodep-2.1_3.jar
commons-logging.jar
log4j-1.2.15.jar
spring-modules-cache.jar
spring.jar

三.配置

两种缓存在spring配置文件中都可以使用两种配置方式,一种是spring2.0以前的完全基于bean的复杂配置,一种是使用后来的基于命名空间的简单配置,两种配置效果相同,分别介绍如下:


EHCache:


1)普通配置

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="
http://www.springframework.org/schema/beans"
 xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="
http://www.springframework.org/schema/beans
 
http://www.springframework.org/schema/beans/spring-beans.xsd">

 <!-- aop代理,这个是必须地,否则缓存不起作用 -->
 <bean id="autoproxy"
  class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />

 
 <!-- EhCache 管理工厂 用于指定ehcache配置文件路径 -->
 <bean id="cacheManager"
  class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
  <property name="configLocation" value="classpath:ehcache.xml" />
 </bean>
 <bean id="cacheProviderFacade" class="org.springmodules.cache.provider.ehcache.EhCacheFacade">
  <property name="cacheManager" ref="cacheManager" />
 </bean>


 <!-- 1.5+ Annotation 基于注解查找被缓存的业务方法 -->
 <bean id="cachingAttributeSource"
  class="org.springmodules.cache.annotations.AnnotationCachingAttributeSource"></bean>
 <!-- 缓存拦截器:定义了缓存模块,ehcache只需要指定配置文件中的缓存名称 -->
 <bean id="cachingInterceptor"
  class="org.springmodules.cache.interceptor.caching.MetadataCachingInterceptor">
  <property name="cacheProviderFacade" ref="cacheProviderFacade" />
  <property name="cachingAttributeSource" ref="cachingAttributeSource" />
  <property name="cachingModels">
   <props>
    <prop key="testCaching">cacheName=testCache</prop>
   </props>
  </property>
 </bean>

 <!-- 基于注解查找缓存业务方法的AOP通知器 -->
 <bean id="cachingAttributeSourceAdvisor"
  class="org.springmodules.cache.interceptor.caching.CachingAttributeSourceAdvisor">
  <constructor-arg ref="cachingInterceptor" />
 </bean>

 <!-- 基于注解查找触发缓存刷新动作的业务方法 -->
 <bean id="flushingAttributeSource"
  class="org.springmodules.cache.annotations.AnnotationFlushingAttributeSource"></bean>

 <!-- 刷新拦截器:定义了刷新策略,基于那个模块ID,刷新相应的缓存 -->
  <bean id="flushingInterceptor"
  class="org.springmodules.cache.interceptor.flush.MetadataFlushingInterceptor">
  <property name="cacheProviderFacade" ref="cacheProviderFacade" />
  <property name="flushingAttributeSource" ref="flushingAttributeSource" />
  <property name="flushingModels">
   <map>
    <entry key="testFlushing">
     <bean
      class="org.springmodules.cache.provider.ehcache.EhCacheFlushingModel">
      
      <property name="cacheNames">
       <list>
        <value>testCache</value>
       </list>
      </property>
      
       <!-- 报错,应该是不能直接设置cacheName
       <property name="cacheName" value="testCache"/>   
       -->   
     </bean>
    </entry>
   </map>

  </property>
 </bean>

 <!-- 基于注解查找刷新缓存业务方法的AOP通知器 -->
 <bean id="flushingAttributeSourceAdvisor"
  class="org.springmodules.cache.interceptor.flush.FlushingAttributeSourceAdvisor">
  <constructor-arg ref="flushingInterceptor" />
 </bean>

 <!-- 测试对象 -->
 <bean id="testCache" class="com.TestCache"/>

</beans> 2)命名空间配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="
http://www.springframework.org/schema/beans"
 xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xmlns:ehcache="http://www.springmodules.org/schema/ehcache"
 xsi:schemaLocation="
   
http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd
   http://www.springmodules.org/schema/ehcachehttp://www.springmodules.org/schema/cache/springmodules-ehcache.xsd">

<!-- 这里可以不需要配置这个
 <bean id="autoproxy" class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />
 -->
 
 <ehcache:config configLocation="classpath:ehcache.xml"
  id="cacheProvider" />
 <ehcache:annotations providerId="cacheProvider">
  <ehcache:caching cacheName="testCache" id="testCaching" />
  <ehcache:flushing cacheNames="testCache" id="testFlushing" />
 </ehcache:annotations>
 
 
 <bean id="testCache" class="com.TestCache"/> 

</beans>

 

 

OSCache:


1)普通配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="
http://www.springframework.org/schema/beans"
 xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="
http://www.springframework.org/schema/beans
 
http://www.springframework.org/schema/beans/spring-beans.xsd">

 <!-- 这个是必须地,否则缓存不起作用 -->
 <bean id="autoproxy"
  class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />

 <!-- 缓存管理工厂:使用OSCache缓存管理,配置了OSCache使用的配置文件路径 -->
 <bean id="cacheManager"
  class="org.springmodules.cache.provider.oscache.OsCacheManagerFactoryBean">
  <property name="configLocation" value="classpath:oscache.properties" />
 </bean>
 <!-- 缓存提供:OSCache -->
 <bean id="cacheProviderFacade" class="org.springmodules.cache.provider.oscache.OsCacheFacade">
  <property name="cacheManager" ref="cacheManager" />
 </bean>

 

 <!-- 1.5+ Annotation 基于注解查找被缓存的业务方法 -->
 <bean id="cachingAttributeSource"
  class="org.springmodules.cache.annotations.AnnotationCachingAttributeSource"></bean>

 <!-- 缓存拦截器:定义了缓存模块,以及相应的刷新策略,以及缓存所属群组 -->
  <bean id="cachingInterceptor"
  class="org.springmodules.cache.interceptor.caching.MetadataCachingInterceptor">
  <property name="cacheProviderFacade" ref="cacheProviderFacade" />
  <property name="cachingAttributeSource" ref="cachingAttributeSource" />
  <property name="cachingModels">
   <props>
    <prop key="testCaching">refreshPeriod=86400;cronExpression=0 1 * * *;groups=pb_test</prop>
   </props>
  </property>
 </bean>

 <!-- 基于注解查找缓存业务方法的AOP通知器 -->
 <bean id="cachingAttributeSourceAdvisor"
  class="org.springmodules.cache.interceptor.caching.CachingAttributeSourceAdvisor">
  <constructor-arg ref="cachingInterceptor" />
 </bean>

 <!-- 基于注解查找触发缓存刷新动作的业务方法 -->
 <bean id="flushingAttributeSource"
  class="org.springmodules.cache.annotations.AnnotationFlushingAttributeSource"></bean>

 <!-- 刷新拦截器:定义了刷新策略,基于那个模块ID,刷新相应的缓存群组 -->
 <bean id="flushingInterceptor"
  class="org.springmodules.cache.interceptor.flush.MetadataFlushingInterceptor">
  <property name="cacheProviderFacade" ref="cacheProviderFacade" />
  <property name="flushingAttributeSource" ref="flushingAttributeSource" />
  <property name="flushingModels">
   <props>
    <prop key="testFlushing">groups=pb_test</prop>
   </props>
  </property>
 </bean>

 <!-- 基于注解查找刷新缓存业务方法的AOP通知器 -->
 <bean id="flushingAttributeSourceAdvisor"
  class="org.springmodules.cache.interceptor.flush.FlushingAttributeSourceAdvisor">
  <constructor-arg ref="flushingInterceptor" />
 </bean>

 <bean id="testCache" class="com.TestCache"/>

</beans>
2)命名空间配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="
http://www.springframework.org/schema/beans"
 xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xmlns:oscache="http://www.springmodules.org/schema/oscache"
 xsi:schemaLocation="
   
http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd
   http://www.springmodules.org/schema/oscachehttp://www.springmodules.org/schema/cache/springmodules-oscache.xsd">

<!-- 这里可以不需要配置这个
 <bean id="autoproxy" class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />
 -->
 
 <oscache:config configLocation="classpath:oscache.properties" id="cacheProvider"/>
 
 <oscache:annotations providerId="cacheProvider">
  <oscache:caching id="testCaching" groups="pb_test" cronExpression="0 1 * * *" refreshPeriod="86400"/>
  <oscache:flushing id="testFlushing" groups="pb_test"/>
 </oscache:annotations>
 
 <bean id="testCache" class="com.TestCache"/>
 
</beans>

 

 

 

四.注解

  @Cacheable:声明一个方法的返回值应该被缓存

例如:@Cacheable(modelId = "testCaching")

  @CacheFlush:声明一个方法是清空缓存的触发器

例如:@CacheFlush(modelId = "testCaching")

五.测试

  这是用使用一个带有main函数的类来进行测试,代码如下:

 

/*
* COPYRIGHT Beijing NetQin-Tech Co.,Ltd.                                   *
****************************************************************************
* 源文件名: TestCache.java                     
* 功能: (描述文件功能)               
* 版本: @version 1.0                                                                   
* 编制日期: 2010-2-24                   
* 说明: (描述使用文件功能时的制约条件)                                      
* 修改历史: (主要历史变动原因及说明)  
* YYYY-MM-DD |    Author      |  Change Description       
* 2010-2-24   |  hanqunfeng    |  Created
*/
package com;

import net.sf.ehcache.CacheManager;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springmodules.cache.annotations.CacheFlush;
import org.springmodules.cache.annotations.Cacheable;

import com.opensymphony.oscache.general.GeneralCacheAdministrator;

public class TestCache {

 /**                                                         
  * 描述 : <描述函数实现的功能>. <br>
  *<p>                                                
                                                                                                                                                                                                      
  * @param args                                                                                         
  */
 static String context = null;
 static ApplicationContext applicationContext;

 static{
  context = "applicationContext-ehcache.xml";//ehcache简单配置(命名空间)
//  context = "applicationContext-ehcache_full.xml";//ehcache完整配置
//  context = "applicationContext-oscache.xml";//oscache简单配置(命名空间)
//  context = "applicationContext-oscache_full.xml";//oscache完整配置
  
  applicationContext = new ClassPathXmlApplicationContext(context);
 }
 public static void main(String[] args) {
     TestCache test = (TestCache)applicationContext.getBean("testCache");
     System.out.println(test.getName(0));
     System.out.println(test.getName(0));
     System.out.println(test.getName(0));
     test.flush();
//     test.OSFlushAll();
//     test.EHFlushAll();
     System.out.println(test.getName(0));
     System.out.println(test.getName(0));
     System.out.println(test.getName(0));
    

 }
 @Cacheable(modelId = "testCaching")
 public String getName(int i){
  System.out.println("Processing testCaching");
  return "nihao:"+i;
 }
 
 @CacheFlush(modelId = "testFlushing")
 public void flush(){
  System.out.println("Processing testFlushing");
 }
 
 /**                                                         
 * 描述 : <OSCache刷新全部缓存>. <br>
 *<p>                                                
      问题:flushAll() 后不会再缓存数据                                                                                                                                                                                                                                                                                         
 */
 public void OSFlushAll(){
  GeneralCacheAdministrator cacheAdmin = (GeneralCacheAdministrator)applicationContext.getBean("cacheManager");
  cacheAdmin.flushAll();
  System.out.println("Processing OSFlushingAll");
 }
 
 /**                                                         
 * 描述 : <清空指定组名称的缓存>. <br>
 *<p>                                                
                                                                                                                                                                                                      
 * @param groupName                                                                                         
 */
 public void OSFlushGroup(String groupName){
  GeneralCacheAdministrator cacheAdmin = (GeneralCacheAdministrator)applicationContext.getBean("cacheManager");
  cacheAdmin.flushGroup(groupName);//清除该组的缓存:pb_test
  System.out.println("Processing OSFlushingGroup:"+groupName);
 }
 
 /**                                                         
 * 描述 : <EHCache刷新全部缓存>. <br>
 *<p>                                                
     success                                                                                                                                                                                                                                                                         
 */
 public void EHFlushAll(){
  CacheManager cacheAdmin = (CacheManager)applicationContext.getBean("cacheManager");
  cacheAdmin.clearAll(); 
  System.out.println("Processing EHFlushingAll");
 }
 
 /**                                                         
 * 描述 : <清空指定名称的缓存>. <br>
 *<p>                                                
                                                                                                                                                                                                      
 * @param cacheName                                                                                         
 */
 public void EHFlushCache(String cacheName){
  CacheManager cacheAdmin = (CacheManager)applicationContext.getBean("cacheManager");
  cacheAdmin.getCache(cacheName).flush();//清除单个缓存:testCache 
  System.out.println("Processing EHFlushingCacheName:"+cacheName);
 }
 

}
 测试结果

Processing testCaching
nihao:0
nihao:0
nihao:0
Processing testFlushing
Processing testCaching
nihao:0
nihao:0
nihao:0

 

六.缓存配置文件

ehcache.xml

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="true"
 monitoring="autodetect">
 <diskStore path="java.io.tmpdir"/>
    <defaultCache
            maxElementsInMemory="10000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            overflowToDisk="true"
            maxElementsOnDisk="10000000"
            diskPersistent="false"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU"
            />
  <cache name="testCache"
           maxElementsInMemory="10000"
           maxElementsOnDisk="1000"
           eternal="false"
           overflowToDisk="true"
           diskSpoolBufferSizeMB="20"
           timeToIdleSeconds="300"
           timeToLiveSeconds="600"
           memoryStoreEvictionPolicy="LFU"
            />
</ehcache> oscache.properties

cache.capacity=5000


原文来自:雨枫技术教程网 http://www.fengfly.com
原文网址:http://www.fengfly.com/plus/view-170699-1.html

 

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