MemCached的工具类。获取cached中的所有key

package com.ibs.auth.controller;

import java.io.UnsupportedEncodingException;

import java.util.Date;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import com.whalin.memcached.MemCachedClient;

import com.whalin.memcached.SockIOPool;

public class MemCachedManager {

// 创建全局的唯一实例

protected static MemCachedClient mcc = new MemCachedClient();

protected static MemCachedManager memCachedManager = new MemCachedManager();

// 设置与缓存服务器的连接池

static {

// 服务器列表和其权重

String[] servers = { "127.0.0.1:11211" };

Integer[] weights = { 3 };

// 获取socke连接池的实例对象

SockIOPool pool = SockIOPool.getInstance();

// 设置服务器信息

pool.setServers(servers);

pool.setWeights(weights);

// 设置初始连接数、最小和最大连接数以及最大处理时间

pool.setInitConn(5);

pool.setMinConn(5);

pool.setMaxConn(250);

pool.setMaxIdle(1000 * 60 * 60 * 6);

//设置主线程睡眠时间，每3秒苏醒一次，维持连接池大小

//maintSleep 千万不要设置成30，访问量一大就出问题，单位是毫秒，推荐30000毫秒。

pool.setMaintSleep(30);

// 设置TCP的参数，连接超时等

pool.setNagle(false);

pool.setSocketTO(3000);

pool.setSocketConnectTO(0);

// 初始化连接池

pool.initialize();

// 压缩设置，超过指定大小（单位为K）的数据都会被压缩

//mcc.setCompressEnable(true);

//mcc.setCompressThreshold(64 * 1024);

}

/**

* 保护型构造方法，不允许实例化！

*

*/

protected MemCachedManager() {

}

/**

* 获取唯一实例.

*

* @return

*/

public static MemCachedManager getInstance() {

return memCachedManager;

}

/**

* 添加一个指定的值到缓存中.

*

* @param key

* @param value

* @return

*/

public boolean add(String key, Object value) {

return mcc.add(key, value);

}

public boolean add(String key, Object value, Date expiry) {

return mcc.add(key, value, expiry);

}

public boolean replace(String key, Object value) {

return mcc.replace(key, value);

}

public boolean replace(String key, Object value, Date expiry) {

return mcc.replace(key, value, expiry);

}

public boolean set(String key,Object value){

return mcc.set(key, value);

}

/**

* 根据指定的关键字获取对象.

*

* @param key

* @return

*/

public Object get(String key) {

return mcc.get(key);

}

/**

* 删除key

*/

public boolean delete(String key){

return mcc.delete(key);

}

public static Map<String,Object> getKeysForMap() throws UnsupportedEncodingException{

Map<String,Object> keylist=new HashMap<String,Object>();

//遍历statsItems 获取items:2:number=14

Map<String,Map<String,String>> statsItems=mcc.statsItems();

Map<String,String> statsItems_sub=null;

String statsItems_sub_key=null;

int items_number=0;

String server=null;

//根据items:2:number=14，调用statsCacheDump，获取每个item中的key

Map<String,Map<String,String>> statsCacheDump=null;

Map<String,String> statsCacheDump_sub=null;

String statsCacheDumpsub_key=null;

String statsCacheDumpsub_key_value=null;

for (Iterator iterator=statsItems.keySet().iterator();iterator.hasNext();) {

server=(String) iterator.next();

statsItems_sub=statsItems.get(server);

//System.out.println(server+"==="+statsItems_sub);

for (Iterator iterator_item=statsItems_sub.keySet().iterator();iterator_item.hasNext();) {

statsItems_sub_key=(String) iterator_item.next();

//System.out.println(statsItems_sub_key+":=:"+bb);

//items:2:number=14

if (statsItems_sub_key.toUpperCase().startsWith("items:".toUpperCase()) && statsItems_sub_key.toUpperCase().endsWith(":number".toUpperCase())){

items_number=Integer.parseInt(statsItems_sub.get(statsItems_sub_key).trim());

//System.out.println(statsItems_sub_key+":=:"+items_number);

statsCacheDump=mcc.statsCacheDump(new String[]{server},Integer.parseInt(statsItems_sub_key.split(":")[1].trim()), items_number);

for (Iterator statsCacheDump_iterator=statsCacheDump.keySet().iterator();statsCacheDump_iterator.hasNext();) {

statsCacheDump_sub=statsCacheDump.get(statsCacheDump_iterator.next());

//System.out.println(statsCacheDump_sub);

for (Iterator iterator_keys=statsCacheDump_sub.keySet().iterator();iterator_keys.hasNext();) {

statsCacheDumpsub_key=(String) iterator_keys.next();

statsCacheDumpsub_key_value=statsCacheDump_sub.get(statsCacheDumpsub_key);

System.out.println(statsCacheDumpsub_key);//key是中文被编码了,是客户端在set之前编码的，服务端中文key存的是密文

System.out.println(statsCacheDumpsub_key_value);

keylist.put(statsCacheDumpsub_key,statsCacheDumpsub_key_value);

} }

}

}

}

return keylist;

}

public static void main(String[] args) {

MemCachedManager cache = MemCachedManager.getInstance();

try {

Map<String,Object> map=getKeysForMap();

for(int i=0;i<map.size();i++){

if(map.containsKey("1")){

System.out.println("it's OK");

}

}

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

cache.add("hello", 234);

System.out.print("get value : " + cache.get("hello"));

}

}