Java client 访问 memcached

        在测试项目中引入了memcached作为缓存层，以下是memcached的缓存配置和调用过程。

• linux下memcached安装过程

             直接参考以前的博文  linux下安装memcached过程   不再详细介绍

• java客户端访问memcached的jar包

             在2.6及以前版本使用的是java_memcached-release_2.6.3.jar，3.0以上版本使用memcached-Java-Client-3.0.2.jar，下载地址为http://mvnrepository.com/artifact/com.whalin/Memcached-Java-Client。这两个版本差异较大，官方说法是由于danga的域名不属于他们所有，所以现在修改了类包名称。这是官方的wiki有相关的解释：https://github.com/gwhalin/Memcached-Java-Client/wiki

• memcached-Java-Client的依赖包

             memcached-Java-Client-3.0.2.jar 需要以下一些包，

            1、commons-pool2-2.4.1.jar依赖包，下载地址http://mvnrepository.com/artifact/org.apache.commons/commons-pool2

            2、junit

            3、slf4j

• application-Context.xml中 配置支持memcached
  

<bean id="memcachedPool" class="com.schooner.MemCached.SchoonerSockIOPool" factory-method="getInstance" init-method="initialize"><constructor-arg><value>neeaMemcachedPool</value></constructor-arg><property name="servers"><list><value>memcached安装的服务器ip地址:memcached的监听端口</value></list></property><property name="initConn"><value>20</value></property><property name="minConn"><value>10</value></property><property name="maxConn"><value>50</value></property><property name="nagle"><value>false</value></property><property name="socketTO"><value>3000</value></property></bean><bean id="memcachedClient" class="com.whalin.MemCached.MemCachedClient"><constructor-arg><value>neeaMemcachedPool</value></constructor-arg></bean>

• memcached操作类

public class Memcached {static MemCachedClient  cachedClient; private Memcached(){}public static void init(){ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:setup/applicationContext.xml"); cachedClient = (MemCachedClient)ctx.getBean("memcachedClient"); }public static Object get(String key) {return cachedClient.get(key);}public static boolean add(String key, Object value) {return cachedClient.add(key, value);}public static boolean add(String key, Object value, Integer expire) {return cachedClient.add(key, value, expire);}public static boolean set(String key, Object value) {return cachedClient.set(key, value);}public static boolean set(String key, Object value, Integer expire) {return cachedClient.set(key, value, expire);}public static boolean replace(String key, Object value) {return cachedClient.replace(key, value);}public static boolean replace(String key, Object value, Integer expire) {return cachedClient.replace(key, value, expire);}public static boolean delete(String key){return cachedClient.delete(key);}}

• 调用测试

      Memcached.set("memcached", "测试");      System.out.println("memcached缓存————————="+ Memcached.get("memcached"));