Spring中AOP实现EHCache的整合中采用SpringModule结合（二）

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缓存技术

在Spring中通过EHCache实现缓存，必须手动缓存或者通过AOP进行缓存实现。通过采用SpringModules进行缓存是EHCache不必进行自动缓存，由SpringMoudles提供拦截器实现，简化开发的。实现如下：

1.EHCache的配置如下：

Java代码

<ehcache>
<diskStore path="java.io.tmpdir" />
<defaultCache maxElementsInMemory="10000" eternal="false"
timeToIdleSeconds="2" timeToLiveSeconds="5" overflowToDisk="true"
maxElementsOnDisk="10000000" diskPersistent="false"
diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU" />
<cache name="testCache" maxElementsInMemory="10000"
maxElementsOnDisk="1000" eternal="false" overflowToDisk="false"
diskSpoolBufferSizeMB="20" timeToIdleSeconds="60" timeToLiveSeconds="3600"
memoryStoreEvictionPolicy="LFU" />
</ehcache>

<ehcache>
     <diskStore path="java.io.tmpdir" />
     <defaultCache maxElementsInMemory="10000" eternal="false"
         timeToIdleSeconds="2" timeToLiveSeconds="5" overflowToDisk="true"
         maxElementsOnDisk="10000000" diskPersistent="false"
         diskExpiryThreadIntervalSeconds="120" memoryStoreEvictionPolicy="LRU" />
     <cache name="testCache" maxElementsInMemory="10000"
         maxElementsOnDisk="1000" eternal="false" overflowToDisk="false"
         diskSpoolBufferSizeMB="20" timeToIdleSeconds="60" timeToLiveSeconds="3600"
        memoryStoreEvictionPolicy="LFU" />
</ehcache>

2.Spring中配置如下

Java代码

<?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-2.5.xsd">
<bean id="cacheManager"
class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<!--EHCache cacheManager
<property name="cacheManagerName" value="mainCache"/>
-->
<property name="configLocation" value="classpath:ehcache.xml" />
</bean>
<bean id="cacheProviderFacade" class="org.springmodules.cache.provider.ehcache.EhCacheFacade">
<property name="cacheManager" ref="cacheManager" />
</bean>
<bean id="cachingInterceptor"
class="org.springmodules.cache.interceptor.caching.MethodMapCachingInterceptor">
<property name="cacheProviderFacade" ref="cacheProviderFacade" />
<property name="cachingModels">
<props>
<prop key="com.easyway.ecache.service.TicketService.get*">cacheName=testCache</prop>
</props>
</property>
</bean>
<bean id="flushingInterceptor"
class="org.springmodules.cache.interceptor.flush.MethodMapFlushingInterceptor">
<property name="cacheProviderFacade" ref="cacheProviderFacade" />
<property name="flushingModels">
<props>
<prop key="com.easyway.ecache.service.TicketService.set*">cacheNames=testCache</prop>
</props>
</property>
</bean>
<bean id="ticketService" class="com.easyway.ecache.service.TicketService"></bean>
<bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
<property name="beanNames">
<list>
<value>ticketService</value>
</list>
</property>
<property name="interceptorNames">
<list>
<value>cachingInterceptor</value>
<value>flushingInterceptor</value>
</list>
</property>
</bean>
</beans>

<?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-2.5.xsd">
  
      <!-- Using a EHCache cache manager -->
      <bean id="cacheManager"
          class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
          <!--EHCache cacheManager 
            <property name="cacheManagerName" value="mainCache"/>
          -->
         <property name="configLocation" value="classpath:ehcache.xml" />
     </bean>
 
     <!-- 使用Spring Modules对 EhCache的封装  -->
     <bean id="cacheProviderFacade" class="org.springmodules.cache.provider.ehcache.EhCacheFacade">
         <property name="cacheManager" ref="cacheManager" />
     </bean>
     
     <!-- 配置 方法 拦截器  -->
     <!-- 缓存拦截器 -->
     <bean id="cachingInterceptor"
         class="org.springmodules.cache.interceptor.caching.MethodMapCachingInterceptor">
         <property name="cacheProviderFacade" ref="cacheProviderFacade" />
         <property name="cachingModels">
          <!-- 进行cache缓存 -->
             <props> 
                <!-- 所有TicketService对象中，以get开头的方法都将进行缓存 -->
                 <prop key="com.easyway.ecache.service.TicketService.get*">cacheName=testCache</prop>
             </props>
         </property>
     </bean>
     
     <!-- 缓存刷新拦截器 -->
     <bean id="flushingInterceptor"
         class="org.springmodules.cache.interceptor.flush.MethodMapFlushingInterceptor">
         <property name="cacheProviderFacade" ref="cacheProviderFacade" />
         <property name="flushingModels">
         <!-- 进行cache刷新(清除) -->
             <props>
                 <prop key="com.easyway.ecache.service.TicketService.set*">cacheNames=testCache</prop>
             </props>
         </property>
     </bean>
     
     <!-- 相关的服务 -->
     <bean id="ticketService" class="com.easyway.ecache.service.TicketService"></bean>
     
     <!-- 配置 基于BeanName规则的动态代理封装 -->
     <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
         <!-- 设置拦截的bean名称 -->
         <property name="beanNames">
             <list>
                 <value>ticketService</value>
             </list>
         </property>
         <!-- 设置拦截器的名称 -->
         <property name="interceptorNames">
             <list>
                 <value>cachingInterceptor</value>
                 <value>flushingInterceptor</value>
             </list>
         </property>
     </bean>
 </beans>

仔细观察可知道上面带颜色的类其实是几个采用AOP实现的拦截器而已。

3.编写测试服务类

Java代码

package com.easyway.ecache.service;
import java.util.List;
/**
* 对其所有的以get* 方式命令的方法，进行缓存处理。当调用set* 命令时，需要其删除缓存
* @author longgangbai
*
*/
@SuppressWarnings("unchecked")
public class TicketService {
/**
* 需要缓存的集合
*/
private List ticketList;
/**
* 需要缓存的服务名称
*/
private String serviceName;
public String getServiceName() {
return serviceName;
}
public void setServiceName(String serviceName) {
this.serviceName = serviceName;
}
public List getTicketList() {
return ticketList;
}
public void setTicketList(List ticketList) {
this.ticketList = ticketList;
}
/**
* 修改的服务端名称备注但是不缓存
* @param serviceName
*/
public void changesetServiceName(String serviceName) {
this.serviceName = serviceName;
}
}

package com.easyway.ecache.service;

import java.util.List;
/**
 * 对其所有的以get* 方式命令的方法，进行缓存处理。当调用set* 命令时，需要其删除缓存
 * @author longgangbai
 *
 */
@SuppressWarnings("unchecked")
public class TicketService {
	
	/**
	 * 需要缓存的集合
	 */
	private List ticketList;
	/**
	 * 需要缓存的服务名称
	 */
	private String serviceName;

	public String getServiceName() {
		return serviceName;
	}

	public void setServiceName(String serviceName) {
		this.serviceName = serviceName;
	}

	public List getTicketList() {
		return ticketList;
	}
	public void setTicketList(List ticketList) {
		this.ticketList = ticketList;
	}
	/**
	 * 修改的服务端名称备注但是不缓存
	 * @param serviceName
	 */
	public void changesetServiceName(String serviceName) {
		this.serviceName = serviceName;
	}
}

4.测试用例如下

Java代码

package com.easyway.ecache.service;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* 测试SpringModule EhCache 的整合的应用
* @author longgangbai
*
*/
public class Test {
public static void main(String[] args) {
ApplicationContext ctx=new ClassPathXmlApplicationContext("classpath*:applicationContext.xml");
TicketService ticketSrv=(TicketService)ctx.getBean("ticketService");
String srvName0=ticketSrv.getServiceName();
//获取初始化服务端名称
System.out.println("srvName0="+srvName0);
//设置存储的名称
ticketSrv.setServiceName("ticketService");
srvName0=ticketSrv.getServiceName();
//获取服务端名称
System.out.println("srvName1="+srvName0);
//修改服务名称但是不缓存
ticketSrv.changesetServiceName("serviceName");
srvName0=ticketSrv.getServiceName();
//获取服务端名称来源自缓存注意观察
System.out.println("srvName2="+srvName0);
//
//srvName0=null
//srvName1=ticketService
//srvName2=ticketService
}
}

package com.easyway.ecache.service;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * 测试SpringModule EhCache 的整合的应用
 * @author longgangbai
 *
 */
public class Test {
public static void main(String[] args) {
	
	ApplicationContext ctx=new ClassPathXmlApplicationContext("classpath*:applicationContext.xml");
	
	TicketService  ticketSrv=(TicketService)ctx.getBean("ticketService");
	
	String srvName0=ticketSrv.getServiceName();
	//获取初始化服务端名称
	System.out.println("srvName0="+srvName0);
	//设置存储的名称
	ticketSrv.setServiceName("ticketService");
    srvName0=ticketSrv.getServiceName();
	//获取服务端名称
	System.out.println("srvName1="+srvName0);
	
	//修改服务名称但是不缓存
	ticketSrv.changesetServiceName("serviceName");
	
	srvName0=ticketSrv.getServiceName();
	//获取服务端名称来源自缓存注意观察
   System.out.println("srvName2="+srvName0);
   //
   //srvName0=null
   //srvName1=ticketService
   //srvName2=ticketService
   
	
}
}

5.测试结果如下：

srvName0=null
srvName1=ticketService
srvName2=ticketService

6.采用的类库如下：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="lib" path="src/spring.jar"/>
<classpathentry kind="lib" path="src/spring-modules-cache.jar"/>
<classpathentry kind="lib" path="src/ehcache-1.6.0-beta4.jar"/>
<classpathentry kind="lib" path="src/commons-lang.jar"/>
<classpathentry kind="lib" path="src/commons-logging.jar"/>
<classpathentry kind="lib" path="src/oro-2.0.7.jar"/>
<classpathentry kind="lib" path="src/cglib-nodep-2.1_3.jar"/>
<classpathentry kind="output" path="bin"/>
</classpath>

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详细介绍软件架构设计的三个维度 | Spring中AOP实现EHCache的整合（一）

2011-09-07 18:09
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