Java使用memcached

jopen 6年前

1.加载commons-pool-1.5.6.jar、java_memcached-release_2.6.6.jar、slf4j-api-1.6.1.jar、slf4j-simple-1.6.1.jar

2.创建memcached工具类:

public class MemcachedUtil {     /**    * memcached客户端单例    */   private static MemCachedClient cachedClient = new MemCachedClient();      /**    * 初始化连接池    */   static {    //获取连接池的实例    SockIOPool pool = SockIOPool.getInstance();        //服务器列表及其权重    String[] servers = {"127.0.0.1:11211"};    Integer[] weights = {3};        //设置服务器信息    pool.setServers(servers);    pool.setWeights(weights);        //设置初始连接数、最小连接数、最大连接数、最大处理时间    pool.setInitConn(10);    pool.setMinConn(10);    pool.setMaxConn(1000);    pool.setMaxIdle(1000*60*60);        //设置连接池守护线程的睡眠时间    pool.setMaintSleep(60);        //设置TCP参数,连接超时    pool.setNagle(false);    pool.setSocketTO(60);    pool.setSocketConnectTO(0);        //初始化并启动连接池    pool.initialize();        //压缩设置,超过指定大小的都压缩  //  cachedClient.setCompressEnable(true);  //  cachedClient.setCompressThreshold(1024*1024);   }      private MemcachedUtil(){   }      public static boolean add(String key, Object value) {    return cachedClient.add(key, value);   }      public static boolean add(String key, Object value, Integer expire) {    return cachedClient.add(key, value, expire);   }      public static boolean put(String key, Object value) {    return cachedClient.set(key, value);   }      public static boolean put(String key, Object value, Integer expire) {    return cachedClient.set(key, value, expire);   }      public static boolean replace(String key, Object value) {    return cachedClient.replace(key, value);   }      public static boolean replace(String key, Object value, Integer expire) {    return cachedClient.replace(key, value, expire);   }      public static Object get(String key) {    return cachedClient.get(key);   }     }
3. 创建需要缓存的对象:

public class UserBean implements Serializable {     private static final long serialVersionUID = 9174194101246733501L;     private String username;      private String password;      public UserBean(String username, String password) {    this.username = username;    this.password = password;   }      public String getUsername() {    return username;   }      public void setUsername(String username) {    this.username = username;   }      public String getPassword() {    return password;   }      public void setPassword(String password) {    this.password = password;   }      @Override   public int hashCode() {    final int prime = 31;    int result = 1;    result = prime * result      + ((password == null) ? 0 : password.hashCode());    result = prime * result      + ((username == null) ? 0 : username.hashCode());    return result;   }     @Override   public boolean equals(Object obj) {    if (this == obj)     return true;    if (obj == null)     return false;    if (getClass() != obj.getClass())     return false;    UserBean other = (UserBean) obj;    if (password == null) {     if (other.password != null)      return false;    } else if (!password.equals(other.password))     return false;    if (username == null) {     if (other.username != null)      return false;    } else if (!username.equals(other.username))     return false;    return true;   }     @Override   public String toString() {    return "username:" + username + ",password:" + password;   }  }
4.创建测试用例:

public class MemcachedUtilTest {     @Test   public void testMemcached() {    MemcachedUtil.put("hello", "world", 60);    String hello = (String) MemcachedUtil.get("hello");    Assert.assertEquals("world", hello);        for(int i = 0; i < 10000000; ++i) {     UserBean userBean = new UserBean("Jason" + i, "123456-" + i);     MemcachedUtil.put("user" + i, userBean, 60);     Object obj = MemcachedUtil.get("user" + i);     Assert.assertEquals(userBean, obj);    }   }  }

5.通过spring注入memcached:

<?xml version="1.0" encoding="UTF-8"?>  <beans xmlns="http://www.springframework.org/schema/beans"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://www.springframework.org/schema/beans             http://www.springframework.org/schema/beans/spring-beans.xsd">     <bean id="memcachedPool" class="com.danga.MemCached.SockIOPool"     factory-method="getInstance" init-method="initialize">    <constructor-arg>     <value>neeaMemcachedPool</value>    </constructor-arg>    <property name="servers">     <list>      <value>127.0.0.1:11211</value>     </list>    </property>    <property name="initConn">     <value>20</value>    </property>    <property name="minConn">     <value>10</value>    </property>    <property name="maxConn">     <value>50</value>    </property>    <property name="nagle">     <value>false</value>    </property>    <property name="socketTO">     <value>3000</value>    </property>   </bean>   <bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient">    <constructor-arg>     <value>neeaMemcachedPool</value>    </constructor-arg>   </bean>  </beans>

6.创建测试用例:

public class MemcachedSpringTest {     private MemCachedClient cachedClient;      @Before   public void init() {    ApplicationContext context = new ClassPathXmlApplicationContext("com/loujinhe/config/beans.xml");    cachedClient = (MemCachedClient)context.getBean("memcachedClient");   }      @Test   public void testMemcachedSpring() {    UserBean user = new UserBean("lou", "jason");    cachedClient.set("user", user);    UserBean cachedBean = (UserBean)user;    Assert.assertEquals(user, cachedBean);   }  }
来自:http://blog.csdn.net/loujinhe/article/details/8491673