Memcached 实例

浏览数：35 / 时间：2015年06月20日

建立Manager类

package com.alisoft.sme.memcached;

import java.util.Date;

import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;

public class MemCachedManager {

    // 创建全局的唯一实例
    protected static MemCachedClient mcc = new MemCachedClient();

    protected static MemCachedManager memCachedManager = new MemCachedManager();

    // 设置与缓存服务器的连接池
    static {
        // 服务器列表和其权重
        String[] servers = { "127.0.0.1:11211" };
        Integer[] weights = { 3 };

        // 获取socke连接池的实例对象
        SockIOPool pool = SockIOPool.getInstance();

        // 设置服务器信息
        pool.setServers(servers);
        pool.setWeights(weights);

        // 设置初始连接数、最小和最大连接数以及最大处理时间
        pool.setInitConn(5);
        pool.setMinConn(5);
        pool.setMaxConn(250);
        pool.setMaxIdle(1000 * 60 * 60 * 6);

        // 设置主线程的睡眠时间
        pool.setMaintSleep(30);

        // 设置TCP的参数，连接超时等
        pool.setNagle(false);
        pool.setSocketTO(3000);
        pool.setSocketConnectTO(0);

        // 初始化连接池
        pool.initialize();

        // 压缩设置，超过指定大小（单位为K）的数据都会被压缩
        mcc.setCompressEnable(true);
        mcc.setCompressThreshold(64 * 1024);
    }

    /**
     * 保护型构造方法，不允许实例化！
     * 
     */
    protected MemCachedManager() {

    }

    /**
     * 获取唯一实例.
     * 
     * @return
     */
    public static MemCachedManager getInstance() {
        return memCachedManager;
    }

    /**
     * 添加一个指定的值到缓存中.
     * 
     * @param key
     * @param value
     * @return
     */
    public boolean add(String key, Object value) {
        return mcc.add(key, value);
    }

    public boolean add(String key, Object value, Date expiry) {
        return mcc.add(key, value, expiry);
    }

    public boolean replace(String key, Object value) {
        return mcc.replace(key, value);
    }

    public boolean replace(String key, Object value, Date expiry) {
        return mcc.replace(key, value, expiry);
    }

    /**
     * 根据指定的关键字获取对象.
     * 
     * @param key
     * @return
     */
    public Object get(String key) {
        return mcc.get(key);
    }

    public static void main(String[] args) {
        MemCachedManager cache = MemCachedManager.getInstance();
        cache.add("hello", 234);
        System.out.print("get value : " + cache.get("hello"));
    }
}

建立数据对象

package com.alisoft.sme.memcached;

import java.io.Serializable;

public class TBean implements Serializable {
    
    private static final long serialVersionUID = 1945562032261336919L;

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

创建测试用例

package com.alisoft.sme.memcached.test;

import junit.framework.TestCase;

import org.junit.Test;

import com.alisoft.sme.memcached.MemCachedManager;
import com.alisoft.sme.memcached.TBean;

public class TestMemcached extends TestCase {

    private static MemCachedManager cache;

    @Test
    public void testCache() {
        
        TBean tb = new TBean();
        tb.setName("E网打进");
        cache.add("bean", tb);
        
        TBean tb1 = (TBean) cache.get("bean");
        System.out.println("name=" + tb1.getName());
        tb1.setName("E网打进_修改的");
        
        tb1 = (TBean) cache.get("bean");
        System.out.println("name=" + tb1.getName());
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        cache = MemCachedManager.getInstance();
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
        cache = null;
    }

}

测试结果

[INFO] ++++ serializing for key: bean for class: com.alisoft.sme.memcached.TBean
[INFO] ++++ memcache cmd (result code): add bean 8 0 93 (NOT_STORED)
[INFO] ++++ data not stored in cache for key: bean
[INFO] ++++ deserializing class com.alisoft.sme.memcached.TBean
name=E网打进
[INFO] ++++ deserializing class com.alisoft.sme.memcached.TBean
name=E网打进