分散キャッシュソフトウェア Memcached の Java クライアントの使用例を説明します。

package com.danga.MemCached.test;
 
import com.danga.MemCached.MemCachedClient;
 
import com.danga.MemCached.SockIOPool;
 
import org.apache.log4j.*;
 
public class TestMemcached {
 
public static void main(String[] args) {
 
// memcached should be running on port 11211 but NOT on 11212
 
BasicConfigurator.configure();
 
//缓存服务器地址，多台服务器则以逗号隔开，11211为memcached使用的端口号
 
String[] servers = { “localhost:11211″ };
 
//得到一个链接池对象并进行一些初始化工作
 
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();
 
MemCachedClient mcc = new MemCachedClient();
 
// turn off most memcached client logging:
 
//Logger.getLogger( MemCachedClient.class.getName() ).setLevel( com.schooner.MemCached.Logger. );
 
//以下是数据写入和取出操作例子
 
for ( int i = 0; i < 10; i++ ) {
 
boolean success = mcc.set( “” + i, “Hello!” );
 
String result = (String)mcc.get( “” + i );
 
System.out.println( String.format( “set( %d ): %s”, i, success ) );
 
System.out.println( String.format( “get( %d ): %s”, i, result ) );
 
}
 
System.out.println( “\n\t — sleeping –\n” );
 
try { Thread.sleep( 10000 ); } catch ( Exception ex ) { }
 
for ( int i = 0; i < 10; i++ ) {
 
boolean success = mcc.set( “” + i, “Hello!” );
 
String result = (String)mcc.get( “” + i );
 
System.out.println( String.format( “set( %d ): %s”, i, success ) );
 
System.out.println( String.format( “get( %d ): %s”, i, result ) );
 
}
 
}
 
}

package com.danga.MemCached.test; 
  
import com.danga.MemCached.*; 
public class TestMemcached { 
 public static void main(String[] args) { 
  /*初始化SockIOPool，管理memcached的连接池*/ 
  String[] servers = { "192.168.105.217:11211" }; 
  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实例*/ 
  MemCachedClient memCachedClient = new MemCachedClient(); 
  for (int i = 0; i < 10; i++) { 
   /*将对象加入到memcached缓存*/ 
   boolean success = memCachedClient.set("" + i, "Hello!"); 
   /*从memcached缓存中按key值取对象*/
   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)); 
  } 
 } 
}