memcache兩種客戶端比較

1.memcached client for java

    客戶端API：memcached client for java

    網址：http://www.whalin.com/memcached（我從 https://github.com/gwhalin/Memcached-Java-Client/downloads 下載的）

    最新版本：java_memcached-release_2.6.6.jar

    操作示例：

package com.dxz.cache.memcachedclient;

import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;

public class TestMemcached {
    public static void main(String[] args) {
        /* 初始化SockIOPool，管理memcached的連接池 */
        String[] servers = { "192.168.8.28:11211" };
        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 < 3; 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));
        }
    }
}

執行結果：

set( 0 ): true
get( 0 ): Hello!
set( 1 ): true
get( 1 ): Hello!
set( 2 ): true
get( 2 ): Hello!

2.spymemcached

    客戶端API：spymemcached client

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

    最新版本：spymemcached-2.9.1.jar

    操作示例：用spymemcached將對象存入緩存及從緩存中取出

package com.dxz.cache.spymemcached;

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 實例，並指定memcached服務的IP地址和端口號 */
            MemcachedClient mc = new MemcachedClient(new InetSocketAddress("192.168.8.28", 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("abcd123", 900, "someObject");
            System.out.println("set():" + b);

            /* 按照key值從memcached中查找緩存，不存在則返回null */
            Object c = mc.get("abcd123");
            System.out.println("get():" + c);
            if (b.get().booleanValue() == true) {
                mc.shutdown();
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

 執行結果：

2016-01-21 19:07:23.213 INFO net.spy.memcached.MemcachedConnection: Added {QA sa=/192.168.8.28:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2016-01-21 19:07:23.219 INFO net.spy.memcached.MemcachedConnection: Connection state changed for sun.nio.ch.SelectionKeyImpl@4eb754b0
set():net.spy.memcached.internal.OperationFuture@23ac5c8b
get():someObject
2016-01-21 19:07:23.253 INFO net.spy.memcached.MemcachedConnection: Shut down memcached client

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.