一：安装
1，如果是LINUX系统，可以到官方网址http://memcached.org/进行下载，安装教程网上一大堆，这里不再叙述。
2，如果是WINDOWS系统
- 到http://code.jellycan.com/memcached/下载稳定版。
- 下载后解压到某个盘下面，比如在c:\memcached，在终端（也即cmd命令界面）下输入 ‘c:\memcached\memcached.exe -d install’ 安装。
- 再输入： ‘c:\memcached\memcached.exe -d start’ 启动。
- 修改memcache的内存大小，可以在注册表里找到HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/memcached Server，修改ImagePath的值为
“C:/memcached/memcached.exe” -d runservice -m 512
NOTE: Windows版本一般用作开发调试只用，不建议在产品环境中使用。
二：JAVA连接使用Memcached
1, 下载memcached客户端开发包，地址https://github.com/gwhalin/Memcached-Java-Client
2，下面是一个连接并使用的简单例子
package com.ea.online.memcache;
import java.util.Date;
import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;
public class MyClass {
// create a static client as most installs only need
// a single instance
protected static MemCachedClient mcc = new MemCachedClient();
protected static SockIOPool pool = null;
// set up connection pool once at class load
static {
// Server list
String[] servers = { "localhost:11211" };
// Specify memcached capacity
Integer[] weights = { 3, 3, 2 };
/*
* String[] serverlist = { "cache0.server.com:12345",
* "cache1.server.com:12345" }; Integer[] weights = { new
* Integer(5), new Integer(2) }; int initialConnections = 10; int
* minSpareConnections = 5; int maxSpareConnections = 50; long
* maxIdleTime = 1000 * 60 * 30; // 30 minutes long maxBusyTime = 1000 *
* 60 * 5; // 5 minutes long maintThreadSleep = 1000 * 5; // 5 seconds
* int socketTimeOut = 1000 * 3; // 3 seconds to block on reads int
* socketConnectTO = 1000 * 3; // 3 seconds to block on initial
* connections. If 0, then will use blocking connect (default) boolean
* failover = false; // turn off auto-failover in event of server down
* boolean nagleAlg = false; // turn off Nagle's algorithm on all
* sockets in pool boolean aliveCheck = false; // disable health check
* of socket on checkout
*
* SockIOPool pool = SockIOPool.getInstance();
* pool.setServers(serverlist);
* pool.setWeights(weights);
* pool.setInitConn(initialConnections);
* pool.setMinConn(minSpareConnections);
* pool.setMaxConn(maxSpareConnections); pool.setMaxIdle(maxIdleTime);
* pool.setMaxBusyTime(maxBusyTime);
* pool.setMaintSleep(maintThreadSleep);
* pool.setSocketTO(socketTimeOut); pool.setNagle(nagleAlg);
* pool.setHashingAlg(SockIOPool.NEW_COMPAT_HASH);
* pool.setAliveCheck(true); pool.initialize();
*/
// grab an instance of our connection pool
pool = SockIOPool.getInstance();
// set the servers and the weights
pool.setServers(servers);
pool.setWeights(weights);
// Specify main thread maintain frequency
pool.setMaintSleep(30);
// set some TCP settings
// disable nagle
pool.setNagle(false);
// set the read timeout to 3 secs
pool.setSocketTO(3000);
// and don't set a connect timeout
pool.setSocketConnectTO(0);
// initialize the connection pool
pool.initialize();
}
// from here on down, you can call any of the client calls
public static void main(String[] args) {
// Test expired
mcc.set("foo", "This is a test String", new Date(
new Date().getTime() + 3000));
String bar = mcc.get("foo").toString();
System.out.println("test-->" + bar);
while (true) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(mcc.get("foo"));
}
// pool.shutDown();
}
}
详细使用可以借鉴这篇文章：http://sillycat.iteye.com/blog/563615
三：结合AOP编程
1，对于memcached与spring aop的集成网上又是一堆，这里不提了。
2，对于memcached与guice aop的集成可参考http://code.google.com/p/google-guice/wiki/AOP
3，对于需要通过手动实现动态代理的方式来实现AOP的可以参考 http://www.blogjava.net/DoubleJ/archive/2008/03/04/183796.html
四：一个简单的环绕通知切面，不可运行，仅作参考
public Around implements MethodInterceptor {
....
public Object invoke(MethodInvocation mi, Object[] args) {
Object obj = null;
//从Memcached中获取
obj = mcc.get(this.class.getName() + mi.getMethodName() + args.hashcode());
if(obj != null) {
return obj;
}
obj = method.invoke(args);
//存入Memcached
mcc.set(this.class.getName() + mi.getMethodName() + args.hashcode, obj, expiredDate);
return obj;
}
....
}