Springboot2.2 Redis多个实例简单的手动配置

在Springboot升级到2.0以后，Redis的配置相比于2.0之前有了特别大的变化，我也初学Springboot2.0，肯定有写得不太对的地方，希望能让阅读这篇帖子的朋友们都有所收获，本文中的springboot版本为：2.2.0.BUILD-SNAPSHOT

 在springboot2.0以后，redis的配置给我的印象主要有两种方式，一是使用standalone方式，就是传统基于jedis的配置，二是使用Lettuce方式,基于netty做的通信，为springboot2.0的新方式，推荐使用lettuce方式，经过批量set和delete的测试（直接使用RedisTemplate的delete方法和opsFor中的set方法），后者的效率比前者要高出一倍左右。

在本文中不管是standalone还是lettuce方式均使用apache的commons-pool2中提供的GenericObjectPoolConfig实例做为redis的连接池，放弃使用jedisPoolConfig。

pom中配置Redis必须要有引用：

    org.springframework.boot
    spring-boot-starter-data-redis


    org.apache.commons
    commons-pool2

Spring的配置文件application.yml:

由于是手动配置多个Redis连接实例，所以必须要注意pool和redia-a/b/c下的变量名称，和springboot的auto-cofing名称有出入

spring:
  redis:
    lettuce:
      pool:
        MaxTotal: 50
        minIdle: 1
        maxWaitMillis: 5000
        maxIdle: 5
        testOnBorrow: true
        testOnReturn: true
        testWhileIdle: true
    redis-a:
      database: 0
      hostName: 192.168.0.88
      port: 6379
      timeout: 5000
    redis-b:
      database: 1
      hostName: ${spring.redis.redis-a.hostName}
      port: ${spring.redis.redis-a.port}
      timeout: ${spring.redis.redis-a.timeout}
    redis-c:
      database: 2
      hostName: ${spring.redis.redis-a.hostName}
      port: ${spring.redis.redis-a.port}
      timeout: ${spring.redis.redis-a.timeout}

standalone

standalone方式配置多个redis连接实例，在使用redis的standalone方式时，需要额外在pom中引入jedis客户端，反正我的需要，虽然我在spring-boot-starter-data-redis这个starter的pom中看到有引入jedis，但是在我的这个demo中并没有把jedis import进来

    redis.clients
    jedis

 

RedisTemplate的配置：

@Configuration
public class StandaloneRedisConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.lettuce.pool")
    @Scope(value = "prototype")
    public GenericObjectPoolConfig redisPool(){
        return new GenericObjectPoolConfig();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.redis-a")
    public RedisStandaloneConfiguration standaloneConfigurationA() {
        return new RedisStandaloneConfiguration();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.redis-b")
    public RedisStandaloneConfiguration standaloneConfigurationB() {
        return  new RedisStandaloneConfiguration();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.redis-c")
    public RedisStandaloneConfiguration standaloneConfigurationC() {
        return new RedisStandaloneConfiguration();
    }

    @Bean
    public JedisConnectionFactory standaloneFactoryA(){
        JedisClientConfiguration poolConfig = JedisClientConfiguration.builder().usePooling().poolConfig(redisPool()).build();
        return  new JedisConnectionFactory(standaloneConfigurationA(), poolConfig);
    }

    @Bean
    public JedisConnectionFactory standaloneFactoryB(){
        JedisClientConfiguration poolConfig = JedisClientConfiguration.builder().usePooling().poolConfig(redisPool()).build();
        return new JedisConnectionFactory(standaloneConfigurationB(), poolConfig);
    }

    @Bean
    public JedisConnectionFactory standaloneFactoryC(){
        JedisClientConfiguration poolConfig = JedisClientConfiguration.builder().usePooling().poolConfig(redisPool()).build();
        return new JedisConnectionFactory(standaloneConfigurationC(), poolConfig);
    }

    @Bean
    public RedisTemplate StringRedisTemplateA(){
        RedisTemplate template = getRedisTemplate();
        template.setConnectionFactory(standaloneFactoryA());
        return template;
    }

    @Bean
    public RedisTemplate StringRedisTemplateB(){
        RedisTemplate template = getRedisTemplate();
        template.setConnectionFactory(standaloneFactoryB());
        return template;
    }

    @Bean
    public RedisTemplate StringRedisTemplateC(){
        RedisTemplate template = getRedisTemplate();
        template.setConnectionFactory(standaloneFactoryC());
        return template;
    }

    private RedisTemplate getRedisTemplate(){
        RedisTemplate template = new RedisTemplate<>();
        template.setValueSerializer(new GenericFastJsonRedisSerializer());
        template.setValueSerializer(new StringRedisSerializer());
        return template;
    }
}

Lettuce

lettuce方式不需要在pom中引入redisClient的包

RedisTemplate配置：

@Configuration
public class LettuceRedisConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.lettuce.pool")
    @Scope(value = "prototype")
    public GenericObjectPoolConfig redisPool(){
        return new GenericObjectPoolConfig();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.redis-a")
    public RedisStandaloneConfiguration redisConfigA(){
        return new RedisStandaloneConfiguration();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.redis-b")
    public RedisStandaloneConfiguration redisConfigB(){
        return new RedisStandaloneConfiguration();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.redis.redis-c")
    public RedisStandaloneConfiguration redisConfigC(){
        return new RedisStandaloneConfiguration();
    }

    @Bean
    @Primary
    public LettuceConnectionFactory factoryA(){
        GenericObjectPoolConfig config = config();
        LettuceClientConfiguration clientConfiguration = LettucePoolingClientConfiguration.builder()
                .poolConfig(config).commandTimeout(Duration.ofMillis(config.getMaxWaitMillis())).build();
        return new LettuceConnectionFactory(redisConfigA(), clientConfiguration);
    }

    @Bean
    public LettuceConnectionFactory factoryB(){
        GenericObjectPoolConfig config = config();
        LettuceClientConfiguration clientConfiguration = LettucePoolingClientConfiguration.builder()
                .poolConfig(config).commandTimeout(Duration.ofMillis(config.getMaxWaitMillis())).build();
        return new LettuceConnectionFactory(redisConfigB(), clientConfiguration);
    }

    @Bean
    public LettuceConnectionFactory factoryC(){
        GenericObjectPoolConfig config = config();
        LettuceClientConfiguration clientConfiguration = LettucePoolingClientConfiguration.builder()
                .poolConfig(config).commandTimeout(Duration.ofMillis(config.getMaxWaitMillis())).build();
        return new LettuceConnectionFactory(redisConfigC(), clientConfiguration);
    }

    @Bean
    public StringRedisTemplate redisTemplateA(){
        StringRedisTemplate template = getRedisTemplate();
        template.setConnectionFactory(factoryA());
        return template;
    }

    @Bean
    public StringRedisTemplate redisTemplateB(){
        StringRedisTemplate template = getRedisTemplate();
        template.setConnectionFactory(factoryB());
        return template;
    }

    @Bean
    public StringRedisTemplate redisTemplateC(){
        StringRedisTemplate template = getRedisTemplate();
        template.setConnectionFactory(factoryC());
        return template;
    }

    private StringRedisTemplate getRedisTemplate(){
        StringRedisTemplate template = new StringRedisTemplate();
        template.setValueSerializer(new GenericFastJsonRedisSerializer());
        template.setValueSerializer(new StringRedisSerializer());
        return template;
    }
}

本文只是抛砖引玉，希望大家给出修改意见