Spring集成Memcached三种方式(一)

转载:http://blog.****.net/u013725455/article/details/52102170

Memcached Client目前有3种： 
Memcached Client for Java 
SpyMemcached 
XMemcached

这三种Client一直存在各种争议： 
Memcached Client for Java 比 SpyMemcached更稳定、更早、更广泛； 
SpyMemcached 比 Memcached Client for Java更高效； 
XMemcached 比 SpyMemcache并发效果更好。

方式一：Memcached Client for Java 
jar包准备：java_memcached-release_2.6.6.jar

memcached.properties配置文件：配置服务器地址，连接数，超时时间等

#######################Memcached配置#######################
#服务器地址
memcached.server1=127.0.0.1
memcached.port1=11211
#memcached.server=127.0.0.1:11211
#初始化时对每个服务器建立的连接数目
memcached.initConn=20
#每个服务器建立最小的连接数
memcached.minConn=10
#每个服务器建立最大的连接数
memcached.maxConn=50
#自查线程周期进行工作，其每次休眠时间
memcached.maintSleep=3000
#Socket的参数，如果是true在写数据时不缓冲，立即发送出去
memcached.nagle=false
#Socket阻塞读取数据的超时时间
memcached.socketTO=3000  

##pool.setServers(servers);
##pool.setWeights(weights);
##pool.setHashingAlg(SockIOPool.CONSISTENT_HASH);
##pool.setInitConn(5);
##pool.setMinConn(5);
##pool.setMaxConn(250);
##pool.setMaxIdle(1000 * 60 * 60 * 6);
##pool.setMaintSleep(30);
##pool.setNagle(false);
##pool.setSocketTO(3000);
##pool.setSocketConnectTO(0);

配置Bean

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
      http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd
       http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">
    <!-- properties config   -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="order" value="1"/>
      <property name="ignoreUnresolvablePlaceholders" value="true"/>
      <property name="locations">
        <list>
            <!--<value>classpath:/com/springmvc/config/memcached.properties</value>-->
            <value>/WEB-INF/config/memcached.properties</value>
        </list>
      </property>
    </bean>
    <!-- Memcached配置 -->
    <bean id="memcachedPool" class="com.danga.MemCached.SockIOPool"
        factory-method="getInstance" init-method="initialize" destroy-method="shutDown">
        <property name="servers">
        <!-- ${memcached.server} -->
            <list>
                <value>${memcached.server1}:${memcached.port1}</value>
            </list>
        </property>
        <property name="initConn">
            <value>${memcached.initConn}</value>
        </property>
        <property name="minConn">
            <value>${memcached.minConn}</value>
        </property>
        <property name="maxConn">
            <value>${memcached.maxConn}</value>
        </property>
        <property name="maintSleep">
            <value>${memcached.maintSleep}</value>
        </property>
        <property name="nagle">
            <value>${memcached.nagle}</value>
        </property>
        <property name="socketTO">
            <value>${memcached.socketTO}</value>
        </property>
    </bean>
</beans>

将app-context-memcached.xml配置到app-context.xml中

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
      http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd
       http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">
    <import resource="app-context-memcached.xml" /><!--memcached 缓存配置 -->
    <!-- <import resource="app-context-xmemcached.xml" /> -->
    <!-- <import resource="app-context-spymemcached.xml" />  -->
    <!-- @Component and @Resource -->
    <bean
        class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />
    <!-- 对com包中的所有类进行扫描，以完成Bean创建和自动依赖注入的功能 -->
    <context:component-scan base-package="com.springmvc.imooc" />
    <!-- 定时器 -->
    <!-- <task:annotation-driven /> -->
    <!-- mvc -->
    <mvc:annotation-driven />
    <!-- Aspect -->
    <!-- <aop:aspectj-autoproxy /> -->
</beans>

Memcached工具类：

/*
 * 文件名：MemcachedUtils.java
 * 版权：Copyright 2007-2016 517na Tech. Co. Ltd. All Rights Reserved.
 * 描述： MemcachedUtils.java
 * 修改人：peiyu
 * 修改时间：2016年8月2日
 * 修改内容：新增
 */
package com.springmvc.imooc.util;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;

import com.danga.MemCached.MemCachedClient;

/**
 * @author peiyu
 */
public final class MemcachedUtils {
    /**
     * cachedClient.
     */
    private static MemCachedClient cachedClient;
    static {
        if (cachedClient == null) {
            cachedClient = new MemCachedClient("memcachedPool");
        }
    }
    /**
     * 构造函数.
     */
    private MemcachedUtils() {
    }
    /**
     * 向缓存添加新的键值对。如果键已经存在，则之前的值将被替换.
     * @param key 键
     * @param value 值
     * @return boolean
     */
    public static boolean set(String key, Object value) {
        return setExp(key, value, null);
    }
    /**
     * 向缓存添加新的键值对。如果键已经存在，则之前的值将被替换.
     * @param key 键
     * @param value 值
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    public static boolean set(String key, Object value, Date expire) {
        return setExp(key, value, expire);
    }
    /**
     * 向缓存添加新的键值对。如果键已经存在，则之前的值将被替换.
     * @param key 键
     * @param value 值
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    private static boolean setExp(String key, Object value, Date expire) {
        boolean flag = false;
        try {
            flag = cachedClient.set(key, value, expire);
        } catch (Exception e) {
            MemcachedLog.writeLog("Memcached set方法报错，key值：" + key + "\r\n" + exceptionWrite(e));
        }
        return flag;
    }
    /**
     * 仅当缓存中不存在键时，add 命令才会向缓存中添加一个键值对.
     * @param key 键
     * @param value 值
     * @return boolean
     */
    public static boolean add(String key, Object value) {
        return addExp(key, value, null);
    }
    /**
     * 仅当缓存中不存在键时，add 命令才会向缓存中添加一个键值对.
     * @param key 键
     * @param value 值
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    public static boolean add(String key, Object value, Date expire) {
        return addExp(key, value, expire);
    }
    /**
     * 仅当缓存中不存在键时，add 命令才会向缓存中添加一个键值对.
     * @param key 键
     * @param value 值
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    private static boolean addExp(String key, Object value, Date expire) {
        boolean flag = false;
        try {
            flag = cachedClient.add(key, value, expire);
        } catch (Exception e) {
            MemcachedLog.writeLog("Memcached add方法报错，key值：" + key + "\r\n" + exceptionWrite(e));
        }
        return flag;
    }
    /**
     * 仅当键已经存在时，replace 命令才会替换缓存中的键.
     * @param key 键
     * @param value 值
     * @return boolean
     */
    public static boolean replace(String key, Object value) {
        return replaceExp(key, value, null);
    }
    /**
     * 仅当键已经存在时，replace 命令才会替换缓存中的键.
     * @param key 键
     * @param value 值
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    public static boolean replace(String key, Object value, Date expire) {
        return replaceExp(key, value, expire);
    }
    /**
     * 仅当键已经存在时，replace 命令才会替换缓存中的键.
     * @param key 键
     * @param value 值
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    private static boolean replaceExp(String key, Object value, Date expire) {
        boolean flag = false;
        try {
            flag = cachedClient.replace(key, value, expire);
        } catch (Exception e) {
            MemcachedLog.writeLog("Memcached replace方法报错，key值：" + key + "\r\n" + exceptionWrite(e));
        }
        return flag;
    }
    /**
     * get 命令用于检索与之前添加的键值对相关的值.
     * @param key 键
     * @return boolean
     */
    public static Object get(String key) {
        Object obj = null;
        try {
            obj = cachedClient.get(key);
        } catch (Exception e) {
            MemcachedLog.writeLog("Memcached get方法报错，key值：" + key + "\r\n" + exceptionWrite(e));
        }
        return obj;
    }
    /**
     * 删除 memcached 中的任何现有值.
     * @param key 键
     * @return boolean
     */
    public static boolean delete(String key) {
        return deleteExp(key, null);
    }
    /**
     * 删除 memcached 中的任何现有值.
     * @param key 键
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    public static boolean delete(String key, Date expire) {
        return deleteExp(key, expire);
    }
    /**
     * 删除 memcached 中的任何现有值.
     * @param key 键
     * @param expire 过期时间 New Date(1000*10)：十秒后过期
     * @return boolean
     */
    @SuppressWarnings("deprecation")
    private static boolean deleteExp(String key, Date expire) {
        boolean flag = false;
        try {
            flag = cachedClient.delete(key, expire);
        } catch (Exception e) {
            MemcachedLog.writeLog("Memcached delete方法报错，key值：" + key + "\r\n" + exceptionWrite(e));
        }
        return flag;
    }
    /**
     * 清理缓存中的所有键/值对.
     * @return boolean
     */
    public static boolean flashAll() {
        boolean flag = false;
        try {
            flag = cachedClient.flushAll();
        } catch (Exception e) {
            MemcachedLog.writeLog("Memcached flashAll方法报错\r\n" + exceptionWrite(e));
        }
        return flag;
    }
    /**
     * 返回异常栈信息，String类型.
     * @param e Exception
     * @return boolean
     */
    private static String exceptionWrite(Exception e) {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        e.printStackTrace(pw);
        pw.flush();
        return sw.toString();
    }
}

　　

测试：

System.out.println(MemcachedUtils.set("aa", "bb", new Date(1000 * 60)));
Object obj = MemcachedUtils.get("aa");
System.out.println("***************************");
System.out.println(obj.toString());