redis分布式工具類 ----RedisShardedPoolUtil

這個是redis分布式的工具類，看非分布式的看  這里

說一下redis的分布式，分布式，無疑，肯定不是一台redis服務器。假如說，我們有兩台redis服務器，一個6379端口，一個6380端口。那么，我們存儲一個數據，他會存在哪個redis服務器上呢？那我們要是取該如何取呢？這是我們需要關心的事情。

下面這個工具類，解決了你上面的困擾，他會把數據盡可能的平均分配到每個redis服務器上面。然后你獲取也不用糾結哪個服務器上獲取。

大體思路和上一篇單機redis差不多，無非是類不一樣。

既然是分布式，肯定是需要你獲取一個一個redis連接，然后搞一個List放進去，然后寫上你需要的一些hash算法，選取規則什么的，這就得到了一個redisPool

看代碼吧。

pom.xml

<dependencies>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
        <!--加速開發的工具，可以省略getset和日志類，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 敲代碼的卡卡羅特
 */
@Slf4j
public class RedisShardedPool {
    private static ShardedJedisPool pool;//sharded jedis連接池
    private static Integer maxTotal = Integer.parseInt(PropertiesUtil.getProperty("redis.max.total","20")); //最大連接數
    private static Integer maxIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.max.idle","20"));//在jedispool中最大的idle狀態(空閑的)的jedis實例的個數
    private static Integer minIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.min.idle","20"));//在jedispool中最小的idle狀態(空閑的)的jedis實例的個數

    private static Boolean testOnBorrow = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.borrow","true"));//在borrow一個jedis實例的時候，是否要進行驗證操作，如果賦值true。則得到的jedis實例肯定是可以用的。
    private static Boolean testOnReturn = Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.return","true"));//在return一個jedis實例的時候，是否要進行驗證操作，如果賦值true。則放回jedispool的jedis實例肯定是可以用的。

    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);//連接耗盡的時候，是否阻塞，false會拋出異常，true阻塞直到超時。默認為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);
        //這就是我上面說的一些參數啥的hash算法之類的
        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();//臨時調用，銷毀連接池中的所有連接
        System.out.println("program is end");*/
        pool.destroy();//臨時調用，銷毀連接池中的所有連接

    }
}

RedisShardedPoolUtil.java

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

/**
 * Created by 敲代碼的卡卡羅特
 */
@Slf4j
public class RedisShardedPoolUtil {

    /**
     * 設置key的有效期，單位是秒
     * @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的單位是秒
    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改成你自己的喲

#最大連接數
redis.max.total=20

#最大空閑數
redis.max.idle=10

#最小空閑數
redis.min.idle=2

#從jedis連接池獲取連接時，校驗並返回可用的連接
redis.test.borrow=true

#把連接放回jedis連接池時，校驗並返回可用的連接
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 敲代碼的卡卡羅特
 */
@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("配置文件讀取異常",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"));
    }

}