java + memcached安装使用
一:安装
(暂时先拿上手的windows做实验)
1.下载memcached.exe , 放在F:\memcached\ 下
2.在CMD下输入 "F:\memcached\memcached.exe -d install" 安装.
3.再输入："F:\memcached\memcached.exe -d start" 启动。以后memcached将作为windows的一个服务每次开机时自动启动。这样服务器端已经安装完毕了。
二:java引包
以下的包都是网上找的, 传说是阿里某高人封的alisoft-xplatform-asf-cache-2.5.1.jar
hessian-3.0.1.jar
stax-api-1.0.1.jar
wstx-asl-2.0.2.jar
三:测试文件
package com.xxx.util;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient;
import com.alisoft.xplatform.asf.cache.memcached.client.SockIOPool;
import com.xxx.entity.attrGrid.Records;
public class MemcachedManager
{
//创建MemCachedClient全局对象
private static MemCachedClient mcc = new MemCachedClient();
static
{
//创建服务器列表及其权重
String[] servers = {"127.0.0.1:11211"};
Integer[] weights = {3};
//创建Socket连接池对象
SockIOPool pool = SockIOPool.getInstance();
//设置服务器信息
pool.setServers(servers);
pool.setWeights(weights);
pool.setFailover(true);
//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
pool.setMaintSleep(30);
//设置TCP参数、连接超时等
pool.setNagle(false);
pool.setSocketTO(3000);
pool.setSocketConnectTO(0);
pool.setAliveCheck(true);
//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);
}
/**
* 无参构造
*/
protected MemcachedManager ()
{
}
protected static MemcachedManager instance = new MemcachedManager();//单例
/**
* 为受保护的对象提供一个公共的访问方法
*/
public static MemcachedManager getInstance ()
{
return instance;
}
/**
* 添加对象到缓存中，构成方法重载
* @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);
}
/**
* 根据指定的关键字获取对象
*/
public Object get(String key) {
return mcc.get(key);
}
/**
* 利用MemCached对象将集合存入缓存，并从缓存中取出
*/
public static void main(String[] args)
{
//得到MemcachedManager实例
MemcachedManager cache = MemcachedManager.getInstance();
//1插入
List<Records> recordsList = new ArrayList<Records>();
for( int i =0 ; i<5 ; i++ )
{
Records records = new Records();
records.setPageSize(i);
recordsList.add(records);
cache.add("SELECT aaa FROM bbb WHERE "+i,records);
}
System.out.println("插入完成==>");
//2获取
for( int i =0 ; i<9 ; i++ )
{
Records records = (Records)cache.get("SELECT aaa FROM bbb WHERE "+i);
if( null == records )
{
System.out.println("dao层 再去查");
}
else
{
String str = records.getPageSize().toString();
System.out.println("从缓存中取得的集合为：" + str);
}
}
}
}
四:现象
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.impl.DefaultCacheImpl - DefaultCache CheckService is start!
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ serializing for key: SELECT+aaa+FROM+bbb+WHERE+0 for class: com.tianditu.entity.attrGrid.Records
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ memcache cmd (result code): add SELECT+aaa+FROM+bbb+WHERE+0 8 0 451
(STORED)
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ data successfully stored for key: SELECT+aaa+FROM+bbb+WHERE+0
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ serializing for key: SELECT+aaa+FROM+bbb+WHERE+1 for class: com.tianditu.entity.attrGrid.Records
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ memcache cmd (result code): add SELECT+aaa+FROM+bbb+WHERE+1 8 0 451
(STORED)
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ data successfully stored for key: SELECT+aaa+FROM+bbb+WHERE+1
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ serializing for key: SELECT+aaa+FROM+bbb+WHERE+2 for class: com.tianditu.entity.attrGrid.Records
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ memcache cmd (result code): add SELECT+aaa+FROM+bbb+WHERE+2 8 0 451
(STORED)
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ data successfully stored for key: SELECT+aaa+FROM+bbb+WHERE+2
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ serializing for key: SELECT+aaa+FROM+bbb+WHERE+3 for class: com.tianditu.entity.attrGrid.Records
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ memcache cmd (result code): add SELECT+aaa+FROM+bbb+WHERE+3 8 0 451
(STORED)
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ data successfully stored for key: SELECT+aaa+FROM+bbb+WHERE+3
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ serializing for key: SELECT+aaa+FROM+bbb+WHERE+4 for class: com.tianditu.entity.attrGrid.Records
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ memcache cmd (result code): add SELECT+aaa+FROM+bbb+WHERE+4 8 0 451
(STORED)
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ data successfully stored for key: SELECT+aaa+FROM+bbb+WHERE+4
插入完成==>
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ deserializing class com.tianditu.entity.attrGrid.Records
从缓存中取得的集合为：0
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ deserializing class com.tianditu.entity.attrGrid.Records
从缓存中取得的集合为：1
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ deserializing class com.tianditu.entity.attrGrid.Records
从缓存中取得的集合为：2
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ deserializing class com.tianditu.entity.attrGrid.Records
从缓存中取得的集合为：3
2014 14:30:31 INFO com.alisoft.xplatform.asf.cache.memcached.client.MemCachedClient - ++++ deserializing class com.tianditu.entity.attrGrid.Records
从缓存中取得的集合为：4
dao层 再去查
dao层 再去查
dao层 再去查
dao层 再去查