1.memcached client for java
客户端API:memcached client for java
网址:http://www.whalin.com/memcached
最新版本:java_memcached-release_2.0.1
操作示例:
Java代码
import com.danga.memcached.*;import org.apache.log4j.*;public class Testmemcached { public static void main(String[] args) { /*初始化SockIOPool,管理memcached的连接池*/ 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)); } }}
2.spymemcached
客户端API:spymemcached client
网址:http://code.Google.com/p/spymemcached/
最新版本:memcached-2.1.jar
操作示例:用spymemcached将对象存入缓存
Java代码
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 实例,并指定memcached服务的IP地址和端口号*/ memcachedClient mc = new memcachedClient(new InetSocketAddress("192.168.1.20", 12111)); Future 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(Exception ex){ ex.printStackTrace(); } }}
用spymemcached从缓存中取得对象
Java代码
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 实例,并指定memcached服务的IP地址和端口号*/ memcachedClient mc = new memcachedClient(new InetSocketAddress("192.168.1.20", 12111)); /*按照key值从memcached中查找缓存,不存在则返回null */Object b = mc.get("neea:testDaF:ksIdno "); mc.shutdown(); } catch(Exception ex){ ex.printStackTrace(); } }}
3.两种API比较
memcached client for java:较早推出的memcached JAVA客户端API,应用广泛,运行比较稳定。
spymemcached:A simple, asynchronous, single-threaded memcached client written in java. 支持异步,单线程的memcached客户端,用到了java1.5版本的concurrent和nio,存取速度会高于前者,但是稳定性不好,测试中常报timeOut等相关异常。
由于memcached client for java发布了新版本,性能上有所提高,并且运行稳定,所以建议使用memcached client for java.
君子无故,玉不去身。