redis分布式工具类 ----RedisShardedPoolUtil

这个是redis分布式的工具类，看非分布式的看  这里

说一下redis的分布式，分布式，无疑，肯定不是一台redis服务器。假如说，我们有两台redis服务器，一个6379端口，一个6380端口。那么，我们存储一个数据，他会存在哪个redis服务器上呢？那我们要是取该如何取呢？这是我们需要关心的事情。

下面这个工具类，解决了你上面的困扰，他会把数据尽可能的平均分配到每个redis服务器上面。然后你获取也不用纠结哪个服务器上获取。

大体思路和上一篇单机redis差不多，无非是类不一样。

既然是分布式，肯定是需要你获取一个一个redis连接，然后搞一个List放进去，然后写上你需要的一些hash算法，选取规则什么的，这就得到了一个redisPool

看代码吧。

pom.xml

<dependencies>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
        <!--加速开发的工具，可以省略getset和日志类，只需要注解就可以-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.6</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.5</version>
        </dependency>

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.2</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.1.2</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.logback-extensions</groupId>
            <artifactId>logback-ext-spring</artifactId>
            <version>0.1.1</version>
        </dependency>
    </dependencies>

RedisShardedPool.java

import lombok.extern.slf4j.Slf4j;
import redis.clients.jedis.*;
import redis.clients.util.Hashing;
import redis.clients.util.Sharded;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by 敲代码的卡卡罗特
 */
@Slf4j
public class RedisShardedPool {
    private static ShardedJedisPool pool;//sharded jedis连接池
    private static Integer maxTotal = Integer.parseInt(PropertiesUtil.getProperty("redis.max.total","20")); //最大连接数
    private static Integer maxIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.max.idle","20"));//在jedispool中最大的idle状态(空闲的)的jedis实例的个数
    private static Integer minIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.min.idle","20"));//在jedispool中最小的idle状态(空闲的)的jedis实例的个数

    private static Boolean testOnBorrow = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.borrow","true"));//在borrow一个jedis实例的时候，是否要进行验证操作，如果赋值true。则得到的jedis实例肯定是可以用的。
    private static Boolean testOnReturn = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.return","true"));//在return一个jedis实例的时候，是否要进行验证操作，如果赋值true。则放回jedispool的jedis实例肯定是可以用的。

    private static String redis1Ip = PropertiesUtil.getProperty("redis1.ip");
    private static Integer redis1Port = Integer.parseInt(PropertiesUtil.getProperty("redis1.port"));
    private static String redis2Ip = PropertiesUtil.getProperty("redis2.ip");
    private static Integer redis2Port = Integer.parseInt(PropertiesUtil.getProperty("redis2.port"));

    private static void initPool(){
        JedisPoolConfig config = new JedisPoolConfig();

        config.setMaxTotal(maxTotal);
        config.setMaxIdle(maxIdle);
        config.setMinIdle(minIdle);

        config.setTestOnBorrow(testOnBorrow);
        config.setTestOnReturn(testOnReturn);

        config.setBlockWhenExhausted(true);//连接耗尽的时候，是否阻塞，false会抛出异常，true阻塞直到超时。默认为true。

        JedisShardInfo info1 = new JedisShardInfo(redis1Ip,redis1Port,1000*2);

        JedisShardInfo info2 = new JedisShardInfo(redis2Ip,redis2Port,1000*2);

        List<JedisShardInfo> jedisShardInfoList = new ArrayList<JedisShardInfo>(2);

        jedisShardInfoList.add(info1);
        jedisShardInfoList.add(info2);
        //这就是我上面说的一些参数啥的hash算法之类的
        pool = new ShardedJedisPool(config,jedisShardInfoList, Hashing.MURMUR_HASH, Sharded.DEFAULT_KEY_TAG_PATTERN);
    }

    static{
        initPool();
    }

    public static ShardedJedis getJedis(){
        return pool.getResource();
    }

    public static void close(ShardedJedis jedis){
        try {
            if (jedis != null) {
                jedis.close();
            }
        } catch (Exception e) {
            log.error("return redis resource exception", e);
        }
    }

    public static void main(String[] args) {
        /*ShardedJedis jedis = pool.getResource();
        System.out.println(jedis.get("key1"));
        for(int i =0;i<10;i++){
            jedis.set("key"+i,"value"+i);
        }
        close(jedis);

        pool.destroy();//临时调用，销毁连接池中的所有连接
        System.out.println("program is end");*/
        pool.destroy();//临时调用，销毁连接池中的所有连接

    }
}

RedisShardedPoolUtil.java

import lombok.extern.slf4j.Slf4j;
import redis.clients.jedis.ShardedJedis;

/**
 * Created by 敲代码的卡卡罗特
 */
@Slf4j
public class RedisShardedPoolUtil {

    /**
     * 设置key的有效期，单位是秒
     * @param key
     * @param exTime
     * @return
     */
    public static Long expire(String key,int exTime){
        ShardedJedis jedis = null;
        Long result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.expire(key,exTime);
        } catch (Exception e) {
            log.error("expire key:{} error",key,e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    //exTime的单位是秒
    public static String setEx(String key,String value,int exTime){
        ShardedJedis jedis = null;
        String result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.setex(key,exTime,value);
        } catch (Exception e) {
            log.error("setex key:{} value:{} error",key,value,e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    public static String set(String key,String value){
        ShardedJedis jedis = null;
        String result = null;

        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.set(key,value);
        } catch (Exception e) {
            log.error("set key:{} value:{} error",key,value,e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    public static String get(String key){
        ShardedJedis jedis = null;
        String result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.get(key);
        } catch (Exception e) {
            log.error("get key:{} error",key,e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    public static Long del(String key){
        ShardedJedis jedis = null;
        Long result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.del(key);
        } catch (Exception e) {
            log.error("del key:{} error",key,e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    public static String getSet(String key,String value) {
        ShardedJedis jedis = null;
        String result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.getSet(key,value);
        } catch (Exception e) {
            log.error("getset key:{} error", key, e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    public static Long setnx(String key, String value) {
        ShardedJedis jedis = null;
        Long result = null;
        try {
            jedis = RedisShardedPool.getJedis();
            result = jedis.setnx(key, value);
        } catch (Exception e) {
            log.error("setnx key:{} value:{} error", key, value, e);
            RedisShardedPool.close(jedis);
            return result;
        }
        RedisShardedPool.close(jedis);
        return result;
    }

    public static void main(String[] args) {
        ShardedJedis jedis = RedisShardedPool.getJedis();

        System.out.println(jedis.get("key1"));

        System.out.println("end");

    }

}

mmall.properties

#redis config start

redis1.ip=127.0.0.1
redis1.port=6379

redis2.ip=127.0.0.1
redis2.port=6380
##Tips：以上redis1和redis2的ip和port改成你自己的哟

#最大连接数
redis.max.total=20

#最大空闲数
redis.max.idle=10

#最小空闲数
redis.min.idle=2

#从jedis连接池获取连接时，校验并返回可用的连接
redis.test.borrow=true

#把连接放回jedis连接池时，校验并返回可用的连接
redis.test.return=false

#redis config end

PropertiesUtil.java

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;

/**
 * Created by 敲代码的卡卡罗特
 */
@Slf4j
public class PropertiesUtil {

    private static Properties props;

    static {
        String fileName = "mmall.properties";
        props = new Properties();
        try {
            props.load(new InputStreamReader(PropertiesUtil.class.getClassLoader().getResourceAsStream(fileName),"UTF-8"));
        } catch (IOException e) {
            log.error("配置文件读取异常",e);
        }
    }

    public static String getProperty(String key){
        String value = props.getProperty(key.trim());
        if(StringUtils.isBlank(value)){
            return null;
        }
        return value.trim();
    }

    public static String getProperty(String key,String defaultValue){

        String value = props.getProperty(key.trim());
        if(StringUtils.isBlank(value)){
            value = defaultValue;
        }
        return value.trim();
    }

    public static void main(String[] arg){
        System.out.println(PropertiesUtil.getProperty("redis.port"));
    }

}