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，并指定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，存取速度會高于前者，但是穩定性不好，測試中常報timeOut等相關異常。

??? 由于memcached client for java發布了新版本，性能上有所提高，并且運行穩定，所以建議使用memcached client for java.

轉載于:https://www.cnblogs.com/duanxz/p/5149323.html

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