Memcached之——Spring与Memcached的集成

转载请注明出处:http://blog.csdn.net/l1028386804/article/details/48229907

这篇文章给大家介绍如何集成spring与Mamcached，以达到系统性能优化的效果

1.安装memcache

1)下载memcached服务端memcached-1.2.6-win32-bin.zip，地址：http://code.jellycan.com/memcached/
2)下载java版客户端 java_memcached-release_2.6.1.zip
3)解压缩memcached-1.2.6-win32-bin.zip到指定目录，例如：D:\memcached-1.2.6-win32 ，
在终端（即cmd命令行界面），执行'D:\memcached-1.2.6-win32\memcached.exe -d install'
安装，再执行：'D:\memcached\memcached.exe -d start'启动,这样memcache就会作为windows系统服务在每 次开机时启动memcache服务。

2. 新建配置文件(spring级别)

新建名为spring-memcache.xml的spring配置文件

<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><bean id="memcachedPool" class="com.danga.MemCached.SockIOPool" factory-method="getInstance" init-method="initialize" destroy-method="shutDown"><constructor-arg><value>neeaMemcachedPool</value></constructor-arg><property name="servers"><list><value>${memcache.server}</value></list></property><property name="initConn"><value>${memcache.initConn}</value></property><property name="minConn"><value>${memcache.minConn}</value></property><property name="maxConn"><value>${memcache.maxConn}</value></property><property name="maintSleep"><value>${memcache.maintSleep}</value></property><property name="nagle"><value>${memcache.nagle}</value></property><property name="socketTO"><value>${memcache.socketTO}</value></property></bean><bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient"><constructor-arg><value>neeaMemcachedPool</value></constructor-arg></bean></beans>

3.Web.xml文件中配置新建的文件

<!-- 配置spring的监听器,加载Spring配置文件--><context-param>    <param-name>contextConfigLocation</param-name>    <param-value>classpath:/spring/applicationContext-common.xml,classpath:/spring/spring-memcache.xml</param-value></context-param>

4. 修改spring配置文件

修改applicationContext-common.xml配置文件。
1).添加properties配置文件（memcache.properties）去配置memcache的属性。

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"><list><value>classpath:memcache.properties</value><value>classpath:jdbc.properties</value></list></property></bean>

2).添加bean去初始化我们自己的一个spring工具类，一会进行详细解释

<bean id="springContextHolder" class="com.hxrainbow.crm.util.SpringContextHolder"/>

5. Memcache配置文件

memcache.properties文件内容如下：

mcache.server=127.0.0.1\:11211memcache.initConn=20memcache.minConn=10memcache.maxConn=50memcache.maintSleep=3000memcache.nagle=falsememcache.socketTO=3000

6. 获得spring容器的工具类

/*** 以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任何时候中取出ApplicaitonContext.* @author liuyazhuang**/public class SpringContextHolder implements ApplicationContextAware{private static ApplicationContext applicationContext;/*** 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.*/public voidsetApplicationContext(ApplicationContext applicationContext) {SpringContextHolder.applicationContext= applicationContext;}/*** 取得存储在静态变量中的ApplicationContext.*/public staticApplicationContext getApplicationContext() {checkApplicationContext();return applicationContext;}/*** 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.*/@SuppressWarnings("unchecked")public static<T> T getBean(String name) {checkApplicationContext();return (T) applicationContext.getBean(name);}/*** 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.* 如果有多个Bean符合Class, 取出第一个.*/@SuppressWarnings("unchecked")public static<T> T getBean(Class<T> clazz) {checkApplicationContext();Map beanMaps = applicationContext.getBeansOfType(clazz);if (beanMaps!=null&& !beanMaps.isEmpty()) {return(T) beanMaps.values().iterator().next();}else{return null;}}private static voidcheckApplicationContext() {if (applicationContext == null) {throw newIllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");}}}

下面是这个方法的简单说明：
Set the ApplicationContext that this object runs in.Normally this call will be used to initialize the object.
我们在配置文件中配置了bean的初始化，然后他就可以用于获得spring容器中的东西了。

7.memcache的工具类

/** * memcache的工具类 * @author liuyazhuang */public class MemcacheUtil {    public static MemCachedClient getMemCachedClient() {        return SpringContextHolder.getBean("memcachedClient");}}

8.junit测试类

/** * 测试类 * @author liuyazhuang */public class MemcacheUtilTest {    static MemCachedClient memcachedClient;    @BeforeClass    public static void setUpBeforeClass() throws Exception {        ApplicationContext ac=new ClassPathXmlApplicationContext(new String[]{"/spring/applicationContext-common.xml","/spring/spring-memcache.xml"});    }    @Test    public void s() {        MemCachedClient m=SpringContextHolder.getBean("memcachedClient");        m.set("name", "liuyazhuang");        System.out.println(m.get("name"));    }}