基礎(chǔ)入門:JAVA客戶端調(diào)用memcached比較

1.memcached client for java
    客戶端API：memcached client for java
    網(wǎng)址：http://www.whalin.com/memcached
    最新版本：java_memcached-release_2.0.1
    操作示例：
    Java代碼
    import com.danga.MemCached.*;
    import org.apache.log4j.*;
    public class TestMemcached {
    public static void main(String[] args) {
    /*初始化SockIOPool，管理memcached的連接池*/
    String[] servers = { "192.168.1.20:12111" };
    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實(shí)例*/
    MemCachedClient memCachedClient = new MemCachedClient();
    for (int i = 0; i < 10; i++) {
    /*將對象加入到memcached緩存*/
    boolean success = memCachedClient.set("" + i, "Hello!");
    /*從memcached緩存中按key值取對象*/
    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));
    }
    }
    }
    2.spymemcached
    客戶端API：spymemcached client
    網(wǎng)址：http://code.google.com/p/spymemcached/
    最新版本：memcached-2.1.jar
    操作示例：用spymemcached將對象存入緩存
    Java代碼
    import java.net.InetSocketAddress;
    import java.util.concurrent.Future;
    import net.spy.memcached.MemcachedClient;
    public class MClient {
    public static void main(String[] args){
    try{
    /*建立MemcachedClient 實(shí)例，并指定memcached服務(wù)的IP地址和端口號*/
    MemcachedClient mc = new MemcachedClient(new InetSocketAddress("192.168.1.20", 12111));
    Future b = null;
    /*將key值，過期時間(秒)和要緩存的對象set到memcached中*/
    b = mc.set("neea:testDaF:ksIdno", 900, "someObject");
    if(b.get().booleanValue()==true){
    mc.shutdown();
    }
    }
    catch(Exception ex){
    ex.printStackTrace();
    }
    }
    }
    用spymemcached從緩存中取得對象
    Java代碼
    import java.net.InetSocketAddress;
    import java.util.concurrent.Future;
    import net.spy.memcached.MemcachedClient;
    public class MClient {
    public static void main(String[] args){
    try{
    /*建立MemcachedClient 實(shí)例，并指定memcached服務(wù)的IP地址和端口號*/
    MemcachedClient mc = new MemcachedClient(new InetSocketAddress("192.168.1.20", 12111));
    /*按照key值從memcached中查找緩存，不存在則返回null */
    Object b = mc.get("neea:testDaF:ksIdno ");
    mc.shutdown();
    }
    catch(Exception ex){
    ex.printStackTrace();
    }
    }
    }
    3.兩種API比較
    memcached client for java：較早推出的memcached JAVA客戶端API，應(yīng)用廣泛，運(yùn)行比較穩(wěn)定。
    spymemcached：A simple， asynchronous， single-threaded memcached client written in java. 支持異步，單線程的memcached客戶端，用到了java1.5版本的concurrent和nio，存取速度會高于前者，但是穩(wěn)定性不好，測試中常報timeOut等相關(guān)異常。
    由于memcached client for java發(fā)布了新版本，性能上有所提高，并且運(yùn)行穩(wěn)定，所以建議使用memcached client for java.