JAVA客户端调用memcached比较

    1.memcached client for java

    客户端API：memcached client for java

    网址：http://www.whalin.com/memcached

最新版本：java_memcached-release_2.0.1

    操作示例：

   
Java代码

import com.danga.MemCached.*; import org.apache.log4j.*; public class TestMemcached {     public static void main(String[] args) {         /*初始化SockIOPool，管理memcached的连接池*/         String[] servers = { "192.168.1.20:12111" };         SockIOPool pool = SockIOPool.getInstance();         pool.setServers(servers);         pool.setFailover(true);         pool.setInitConn(10);         pool.setMinConn(5);         pool.setMaxConn(250);         pool.setMaintSleep(30);         pool.setNagle(false);         pool.setSocketTO(3000);         pool.setAliveCheck(true);         pool.initialize();         /*建立MemcachedClient实例*/         MemCachedClient memCachedClient = new MemCachedClient();         for (int i = 0; i < 10; i++) {             /*将对象加入到memcached缓存*/             boolean success = memCachedClient.set("" + i, "Hello!");             /*从memcached缓存中按key值取对象*/             String result = (String) memCachedClient.get("" + i);             System.out.println(String.format("set( %d ): %s", i, success));             System.out.println(String.format("get( %d ): %s", i, result));         }     } }

    2.spymemcached

    客户端API：spymemcached client

    网址：http://code.google.com/p/spymemcached/

    最新版本：memcached-2.1.jar

    操作示例：用spymemcached将对象存入缓存

   
Java代码

import java.net.InetSocketAddress; import java.util.concurrent.Future; import net.spy.memcached.MemcachedClient; public class MClient {     public static void main(String[] args){         try{             /*建立MemcachedClient 实例，并指定memcached服务的IP地址和端口号*/             MemcachedClient mc = new MemcachedClient(new InetSocketAddress("192.168.1.20", 12111));             Future<Boolean> b = null;             /*将key值，过期时间(秒)和要缓存的对象set到memcached中*/             b = mc.set("neea:testDaF:ksIdno", 900, "someObject");             if(b.get().booleanValue()==true){                 mc.shutdown();             }         }         catch(Exception ex){             ex.printStackTrace();         }     } }

    用spymemcached从缓存中取得对象

    Java代码

import java.net.InetSocketAddress; import java.util.concurrent.Future; import net.spy.memcached.MemcachedClient; public class MClient {     public static void main(String[] args){         try{             /*建立MemcachedClient 实例，并指定memcached服务的IP地址和端口号*/             MemcachedClient mc = new MemcachedClient(new InetSocketAddress("192.168.1.20", 12111));             /*按照key值从memcached中查找缓存，不存在则返回null */ Object b = mc.get("neea:testDaF:ksIdno ");             mc.shutdown();         }         catch(Exception ex){             ex.printStackTrace();         }     } }

    3.两种API比较

    memcached client for java：较早推出的memcached JAVA客户端API，应用广泛，运行比较稳定。

    spymemcached：A simple， asynchronous， single-threaded memcached client written in java. 支持异步，单线程的memcached客户端，用到了java1.5版本的concurrent和nio，存取速度会高于前者，但是稳定性不好，测试中常报timeOut等相关异常。

    由于memcached client for java发布了新版本，性能上有所提高，并且运行稳定，所以建议使用memcached client for java.