Another unnamed CacheManager already exists in the same VM

标签：ehcache   ehcachemanagerfactor   beans   缓存机制   单元测试   

今天学习Spring 缓存机制，遇到不少问题~

好不容易缓存的单元测试用例调试成功了，在同一项目下单元测试另外一个文件时，发生了异常：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheManagerFactory' defined in file [D:\workspaces\eclipse_svn\NewsPortalProject\WebContent\WEB-INF\classes\config\ehcache.applicationContext.xml]: Invocation of init method failed; nested exception is net.sf.ehcache.CacheException: Another unnamed CacheManager already exists in the same VM. Please provide unique names for each CacheManager in the config or do one of following:
1. Use one of the CacheManager.create() static factory methods to reuse same CacheManager with same name or create one if necessary
2. Shutdown the earlier cacheManager before creating new one with same name.

由于项目下有三个配置文件，都放在同一目录下：

在另个单元测试用例中实例化Spring容器的时候，所有的配置文件都加载进去了

ApplicationContext aCtx = new FileSystemXmlApplicationContext("classpath:config/*.xml");

1.缓存测试用例中，实例化容器时，只读缓存相关的配置文件；

ApplicationContext aCtx = new FileSystemXmlApplicationContext("classpath:ehcache/*.xml");

ApplicationContext aCtx = new FileSystemXmlApplicationContext("classpath:config/*.xml");

配置文件路径：/project/src/test/resources/ehcache

ehcache.xml

<?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 
           maxElementsInMemory="1000"
           eternal="false"
           timeToIdleSeconds="10"
           timeToLiveSeconds="10"
           overflowToDisk="false"/>
    <cache name="newslist"
    	   eternal="false"
    	   timeToIdleSeconds="360" 
           timeToLiveSeconds="3600"
           maxElementsInMemory="100"
           overflowToDisk="false"
           diskPersistent="false"
           memoryStoreEvictionPolicy="LRU" />
</ehcache>

<?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:context="http://www.springframework.org/schema/context"  
    xmlns:oxm="http://www.springframework.org/schema/oxm"  
    xmlns:mvc="http://www.springframework.org/schema/mvc"  
    xmlns:cache="http://www.springframework.org/schema/cache"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd  
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/cache 
        http://www.springframework.org/schema/cache/spring-cache.xsd"> 
    <!--  缓存  属性-->
    <context:component-scan base-package="com.test" />
    <bean id="cacheManagerFactory" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">  
        <property name="configLocation"  value="classpath:ehcache/ehcache.xml"/> 
	</bean> 
	<!-- 支持缓存注解 -->
    <cache:annotation-driven cache-manager="cacheManager" />
    <!-- 默认是cacheManager -->
    <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager" >  
        <property name="cacheManager"  ref="cacheManagerFactory"/>
    </bean>  
</beans> 

package com.test.news.util;


import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.cache.Cache;
import org.springframework.cache.CacheManager;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;


/**   
 *    
 * 项目名称：NewsPortalProject   
 * 类名称：DirectcityCacheTest   
 * 类描述：   
 * 创建人：XianJuanJuan   
 * 创建时间：2015年6月2日 下午2:11:45    
 * @version    
 *    
 */
public class DirectcityCacheTest {
	
	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
	}

	@SuppressWarnings("resource")
	@Test
	public void init() {
		ApplicationContext aCtx = new FileSystemXmlApplicationContext("classpath:ehcache/*.xml");
		CacheManager cacheManager = (CacheManager) aCtx.getBean("cacheManager");
		// 为了测试缓存是否成功，这里加一个
		for (int i = 0; i<5;i++) {
			Object obj = cacheManager.getCache("newslist").get("a1");
			String data = null;
			if (obj == null) {
				System.out.println("i="+i+";第一次执行该方法，缓存中还没有数据");
			} else {
				data = (String) cacheManager.getCache("newslist").get("a1").get();
				System.out.println("i="+i+";第"+i+"次读到的缓存中的内容："+cacheManager.getCache("newslist").get("a1").get());
			}
			String list = ""+i;
			if (data == null) {
				list = list + "String";
				if(list != null && !"".equals(list)) {
					Cache cache = cacheManager.getCache("newslist");
					if (cache != null) {
						cache.put("a1", list);
					}
				}

			}
		}
	}
}

Another unnamed CacheManager already exists in the same VM

标签：ehcache   ehcachemanagerfactor   beans   缓存机制   单元测试   

原文地址：http://blog.csdn.net/jeofey/article/details/46332623