16 redis高可用读写分离方案

在前面说的JedisSentinelPool只能实现主从的切换，而无法实现读写的分离。

1.哨兵的客户端实现主从切换方案

<dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>

        
        <dependency>
            <groupId>redis.clientsgroupId>
            <artifactId>jedisartifactId>
            <version>3.6.3version>
        dependency>


    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>

# Redis哨兵服务器地址
redis.sentinel=aliyun:26885,aliyun:26886,aliyun:26887
redis.master=mymaster
# Redis服务器连接密码（默认为空）
redis.password=null
redis.timeout=30000
# 连接池最大连接数（使用负值表示没有限制）
redis.maxTotal=30
# 连接池中的最大空闲连接
redis.maxIdle=10
redis.numTestsPerEvictionRun=1024
redis.timeBetweenEvictionRunsMillis=30000
redis.minEvictableIdleTimeMillis=1800000
redis.softMinEvictableIdleTimeMillis=10000
# 连接池最大阻塞等待时间（使用负值表示没有限制）
redis.maxWaitMillis=1500
redis.testOnBorrow=true
redis.testWhileIdle=true
redis.blockWhenExhausted=false
redis.JmxEnabled=true

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.JedisSentinelPool;

import java.util.HashSet;
import java.util.Set;

@Configuration
@PropertySource("classpath:application.properties")
public class RedisSentinelConfig {
    @Value("${redis.sentinel}")
    private String hosts;

    @Value("${redis.master}")
    private String master;

    @Value("${redis.timeout}")
    private int timeout;

    @Value("${redis.maxIdle}")
    private int maxIdle;

    @Value("${redis.maxWaitMillis}")
    private int maxWaitMillis;

    @Value("${redis.blockWhenExhausted}")
    private Boolean blockWhenExhausted;

    @Value("${redis.JmxEnabled}")
    private Boolean JmxEnabled;

    @Bean
    public JedisPoolConfig  jedisPoolConfigFactory() {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        jedisPoolConfig.setMaxIdle(maxIdle);
        jedisPoolConfig.setMaxWaitMillis(maxWaitMillis);
        // 连接耗尽时是否阻塞, false报异常,true阻塞直到超时, 默认true
        jedisPoolConfig.setBlockWhenExhausted(blockWhenExhausted);
        // 是否启用pool的jmx管理功能, 默认true
        jedisPoolConfig.setJmxEnabled(JmxEnabled);

        jedisPoolConfig.setTestOnBorrow(true);
        jedisPoolConfig.setTestOnReturn(true);
        return jedisPoolConfig;
    }

    @Bean
    public JedisSentinelPool JedisSentinelPoolFactory(JedisPoolConfig jedisPoolConfig){

        Set<String> nodeSet = new HashSet<>();
        //获取到节点信息
        String nodeString = hosts;
        //判断字符串是否为空
        if(nodeString == null || "".equals(nodeString)){
            throw new RuntimeException("RedisSentinelConfiguration initialize error nodeString is null");
        }
        String[] nodeArray = nodeString.split(",");
        //判断是否为空
        if(nodeArray == null || nodeArray.length == 0){
            throw new RuntimeException("RedisSentinelConfiguration initialize error nodeArray is null");
        }
        //循环注入至Set中
        for(String node : nodeArray){
            System.out.println("Read node : "+node);
            nodeSet.add(node);
        }
        //创建连接池对象
        JedisSentinelPool jedisSentinelPool = new JedisSentinelPool(master,nodeSet,jedisPoolConfig ,timeout);
        return jedisSentinelPool;
    }

}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisSentinelPool;

/**
 * 操作字符串类型
 */
@Component
public class RedisString {

    public final static String RS_STR_NS = "rs:";

    @Autowired
    private JedisSentinelPool jedisSentinelPool;

    /**
     * 向Redis中存值，永久有效
     */
    public String set(String key, String value) {
        Jedis jedis = null;
        try {
            jedis = jedisSentinelPool.getResource();
            return jedis.set(RS_STR_NS +key, value);
        } catch (Exception e) {
            throw new RuntimeException("向Redis中存值失败！");
        } finally {
            jedis.close();
        }
    }

    /**
     * 批量向Redis中存值，永久有效
     */
    public String msetRaw(String... keysvalues) {
        Jedis jedis = null;
        try {
            jedis = jedisSentinelPool.getResource();
            return jedis.mset(keysvalues);
        } catch (Exception e) {
            throw new RuntimeException("批量向Redis中存值失败！");
        } finally {
            jedis.close();
        }
    }

    /**
     * 根据传入Key获取指定Value
     */
    public String get(String key) {
        Jedis jedis = null;
        try {
            jedis = jedisSentinelPool.getResource();
            return jedis.get(RS_STR_NS +key);
        } catch (Exception e) {
            throw new RuntimeException("获取Redis值失败！");
        } finally {
            jedis.close();
        }
    }

}

2、读写分离的实现

需要自己去封装代码实现。
待补充