JAVA客戶端API調用memcached兩種方式

1. memcached client for java客戶端API：memcached client for java

引入jar包：java-memcached-2.6.2.jar

package com.pcitc.memcached;

import com.danga.MemCached.*;

public class TestMemcached {
    public static void main(String[] args) {
        /* 初始化SockIOPool，管理memcached的連接池 */
        String[] servers = { "192.168.1.111:11211" };
        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實例 */
        MemCachedClient memCachedClient = new MemCachedClient();
        for (int i = 0; i < 10; i++) {
            /* 將對象加入到memcached緩存 */
            boolean success = memCachedClient.set("" + i, "Hello!");
            /* 從memcached緩存中按key值取對象 */
            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客戶端API：spymemcached client

引入jar包：spymemcached-2.10.3.jar

package com.pcitc.memcached;

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MClient {

    public static void main(String[] args) {
        setValue();
        getValue();
    }

    // 用spymemcached將對象存入緩存
    public static void setValue() {
        try {
            /* 建立MemcachedClient 實例，並指定memcached服務的IP地址和端口號 */
            MemcachedClient mc = new MemcachedClient(new InetSocketAddress(
                    "192.168.1.111", 11211));
            Future<Boolean> b = null;
            /* 將key值，過期時間(秒)和要緩存的對象set到memcached中 */
            b = mc.set("neead", 900, "someObject");
            if (b.get().booleanValue() == true) {
                mc.shutdown();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    // 用spymemcached從緩存中取得對象
    public static void getValue() {
        try {
            /* 建立MemcachedClient 實例，並指定memcached服務的IP地址和端口號 */
            MemcachedClient mc = new MemcachedClient(new InetSocketAddress(
                    "192.168.1.111", 11211));
            /* 按照key值從memcached中查找緩存，不存在則返回null */
            Object b = mc.get("neead");
            mc.shutdown();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

3.兩種API比較 
memcached client for java：較早推出的memcached JAVA客戶端API，應用廣泛，運行比較穩定。 
spymemcached：A simple, asynchronous, single-threaded memcached client written in java. 支持異步，單線程的memcached客戶端，用到了java1.5版本的concurrent和nio，存取速度會高於前者，但是穩定性不好，測試中常報timeOut等相關異常。 
由於memcached client for java發布了新版本，性能上有所提高，並且運行穩定，所以建議使用memcached client for java。