JAVA客户端调用memcached

最新版本：java_memcached-release_2.0.1

importcom.danga.MemCached.*;
importorg.apache.log4j.*;
publicclassTestMemcached{
publicstaticvoidmain(String[]args){
/*初始化SockIOPool，管理memcached的连接池*/
String[]servers={"192.168.1.20:12111"};
SockIOPoolpool=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实例*/
MemCachedClientmemCachedClient=newMemCachedClient();
for(inti=0;i<10;i++){
/*将对象加入到memcached缓存*/
booleansuccess=memCachedClient.set(""+i,"Hello!");
/*从memcached缓存中按key值取对象*/
Stringresult=(String)memCachedClient.get(""+i);
System.out.println(String.format("set(%d):%s",i,success));
System.out.println(String.format("get(%d):%s",i,result));
}
}
}

2.spymemcached客户端API：spymemcachedclient

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

最新版本：memcached-2.1.jar

操作示例：

importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;


importnet.spy.memcached.MemcachedClient;


publicclassMClient{


publicstaticvoidmain(String[]args){
try{
/*建立MemcachedClient实例，并指定memcached服务的IP地址和端口号*/
MemcachedClientmc=newMemcachedClient(newInetSocketAddress("192.168.1.20",12111));
Future<Boolean>b=null;
/*将key值，过期时间(秒)和要缓存的对象set到memcached中*/
b=mc.set("neea:testDaF:ksIdno",900,"someObject");
if(b.get().booleanValue()==true){
mc.shutdown();
}
}
catch(Exceptionex){
ex.printStackTrace();
}
}
}

importjava.net.InetSocketAddress;
importjava.util.concurrent.Future;


importnet.spy.memcached.MemcachedClient;


publicclassMClient{


publicstaticvoidmain(String[]args){
try{
/*建立MemcachedClient实例，并指定memcached服务的IP地址和端口号*/
MemcachedClientmc=newMemcachedClient(newInetSocketAddress("192.168.1.20",12111));
/*按照key值从memcached中查找缓存，不存在则返回null*/
Objectb=mc.get("neea:testDaF:ksIdno");
mc.shutdown();
}
catch(Exceptionex){
ex.printStackTrace();
}
}
}

<memcached>

<clientname="mclient0"compressEnable="true"defaultEncoding="UTF-8"socketpool="pool0">

<errorHandler>com.moit.xplatform.asf.cache.memcached.MemcachedErrorHandler</errorHandler>

</client>

<clientname="mclient1"compressEnable="true"defaultEncoding="UTF-8"socketpool="pool1">

<errorHandler>com.moit.xplatform.asf.cache.memcached.MemcachedErrorHandler</errorHandler>

</client>

<clientname="mclient2"compressEnable="true"defaultEncoding="UTF-8"socketpool="pool2">

<errorHandler>com.moit.xplatform.asf.cache.memcached.MemcachedErrorHandler</errorHandler>

<socketpoolname="pool0"failover="true"initConn="5"minConn="5"maxConn="250"maintSleep="0"

nagle="false"socketTO="3000"aliveCheck="true">

<servers>192.168.3.251:11211,192.168.3.251:11211</servers>

</socketpool>

<socketpoolname="pool1"failover="true"initConn="5"minConn="5"maxConn="250"maintSleep="0"

nagle="false"socketTO="3000"aliveCheck="true">

<servers>192.168.3.251:11211,192.168.3.251:11211</servers>

</socketpool>

<socketpoolname="pool2"failover="true"initConn="5"minConn="5"maxConn="250"maintSleep="0"

nagle="false"socketTO="3000"aliveCheck="true">

<servers>192.168.3.251:11211,192.168.3.251:11211</servers>

<memCachedClients>mclient1,mclient2</memCachedClients>

System.out.println("是否包含了key的数据="+cache.containsKey("key"));

if(cache.containsKey("key"))

{

System.out.println("包含了key的数据");

System.out.println("从cache服务器获得key值");

}

else

{

System.out.println("没有包含了key的数据");

System.out.println("cache服务器,没有数据,则去取数据库数据!");

}

例子：

staticICacheManager<IMemcachedCache>manager;

/**

*测试MemCached

*@return

*/

publicStringmemcache()

{

manager=CacheUtil.getCacheManager(IMemcachedCache.class,

MemcachedCacheManager.class.getName());

manager.start();

try

{

IMemcachedCachecache=manager.getCache("mclient0");

//根据key得到缓存数据

Stringa=(String)cache.get("key");

//用containsKey方法判断cache服务器按指定的key值是否存在。

System.out.println("是否包含了key的数据="+cache.containsKey("key"));

if(cache.containsKey("key"))

{

System.out.println("包含了key的数据");

System.out.println("从cache服务器获得key值");

}

else

{

System.out.println("没有包含了key的数据");

System.out.println("cache服务器,没有数据,则去取数据库数据!");

}

//根据key删除服务器上的对应的缓存数据

cache.remove("key");

//根据key保存数据到服务器上

cache.put("key","你好!");

Calendarcalendar=Calendar.getInstance();//当前日期

calendar.setTime(newDate());

calendar.add(Calendar.MINUTE,30);//

cache.remove("keytime");

cache.put("keytime","30分钟后过期",calendar.getTime());

System.out.println("30分钟后过期=keytime="+cache.get("keytime"));

System.out.println("cache服务器getTime="+calendar.getTime());

return"testmempage";

总结:三种API比较

memcachedclientforjava：较早推出的memcachedJAVA客户端API，应用广泛，运行比较稳定。