SpringBoot配置redis集群(Jedis and lettuce)

Love The Way You Lie 2022-12-26 11:28 399阅读 0赞

### SpringBoot2.x版本配置redis集群(Jedis and lettuce) ###

在SpringBoot1.x版本中，springboot默认使用集成jedis，在SpringBoot2.x版本中，SpringBoot默认集成lettuce。

##### Jedis vs Lettuce #####

1. Jedis使用直连方式连接Redis Server，在多线程环境下存在线程安全问题，需要增加连接池创建Jedis客户端多实例线程安全问题，基于传统I/O模式，是阻塞式传输！
    2. Lettuce的连接是基于netty，在多线程环境下不存在线程安全问题，这个连接实例当然也是可伸缩的设计，也可以增加多实例连接，netty本身就基于NIO，从而提供了异步和同步数据访问方式，用于构建非阻塞的反应性应用程序。

##### 使用SpringBoot2.3.4，Lettuce配置redis集群。 #####

###### 1. pom.xml配置 ######

<properties>
    	<spring-boot.version>2.3.4.RELEASE</spring-boot.version>
    	<commons-pool.version>2.5.0</commons-pool.version>
    </properties>
    
    <dependency>
    	<groupId>org.springframework.boot</groupId>
    	<artifactId>spring-boot-starter-data-redis</artifactId>
    	<version>${spring-boot.version}</version>
    </dependency>
    
    <dependency>
    	<groupId>org.apache.commons</groupId>
    	<artifactId>commons-pool2</artifactId>
    	<version>${commons-pool.version}</version>
    </dependency>

###### 2. yaml配置 ######

#yaml配置
    spring: 
        redis: 
         database: 0 
         cluster:
           nodes: 127.0.0.1:7001,127.0.0.1:7002,127.0.0.1:7003,127.0.0.1:7004,127.0.0.1:7005,127.0.0.1:7006 #集群节点
         password: xxxx     #密码
         lettuce:
          pool:
            max-active: 10 #连接池最大连接数 
            max-idle: 8 #连接池中最大空闲连接数
            max-wait: -1ms  #连接池最大等待阻塞时间
            min-idle: 0 #连接池中最小空闲数
         timeout: 5000 #访问超时时间

###### 3. 配置RedisTemplate ######

@Configuration
    public class RedisConfig { 
        @Bean
        RedisTemplate<String, Serializable> redisTemplate(LettuceConnectionFactory redisConnectionFactory) { 
            RedisTemplate<String, Serializable> redisTemplate = new RedisTemplate<>();
            redisTemplate.setConnectionFactory(redisConnectionFactory);
            Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
            redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
            redisTemplate.setKeySerializer(new StringRedisSerializer());
            redisTemplate.setHashKeySerializer(new StringRedisSerializer());
            redisTemplate.afterPropertiesSet();
            return redisTemplate;
        }
        @Bean
        public CacheManager cacheManager(LettuceConnectionFactory factory) { 
            // 配置序列化
            RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
            RedisCacheConfiguration redisCacheConfiguration = 					config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer())).serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
            return RedisCacheManager.builder(factory).cacheDefaults(redisCacheConfiguration).build();
        }
    }

##### Jedis配置redis集群 #####

###### 1. pom.xml配置、 ######

<properties>
    	<spring-boot.version>2.3.4.RELEASE</spring-boot.version>
    	<jedis.version>3.3.0</jedis.version>
    </properties>
    
    
    <dependency>
    	<groupId>org.springframework.boot</groupId>
    	<artifactId>spring-boot-starter-data-redis</artifactId>
    	<version>${spring-boot.version}</version>
    	<exclusions>
    		<exclusion>
    			<groupId>io.lettuce</groupId>
    			<artifactId>lettuce-core</artifactId>
    		</exclusion>
    	</exclusions>
    </dependency>
    
    <dependency>
    	<groupId>redis.clients</groupId>
    	<artifactId>jedis</artifactId>
    	<version>${jedis.version}</version>
    </dependency>

> 注：这里有一个比较坑的地方，导入的Jedis版本必须要和springboot版本兼容，需要点入spring-boot-starter-data-redis的pom文件查看spring-data-redis，然后继续点击spring-data-redis查看对应jedis版本

第一步:  
![C:\\Users\\gaobo2\\AppData\\Roaming\\Typora\\typora-user-images\\image-20201205170147141.png][C_Users_gaobo2_AppData_Roaming_Typora_typora-user-images_image-20201205170147141.png]  
第二步：  
![在这里插入图片描述][20201205173426532.png_pic_center]

第三步：就可以查看到当前springboot对应哪一个jedis版本，然后在自己的pom中引入和这个redis对应的版本。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JpZ25pdUJPR0U_size_16_color_FFFFFF_t_70_pic_center]

###### 2. yaml配置 ######

#yaml配置
    spring: 
        redis: 
         database: 0 
         cluster:
           nodes: 127.0.0.1:7001,127.0.0.1:7002,127.0.0.1:7003,127.0.0.1:7004,127.0.0.1:7005,127.0.0.1:7006 #集群节点
         password: xxxx     #密码
         jedis:
          pool:
            max-active: 10 #连接池最大连接数 
            max-idle: 8 #连接池中最大空闲连接数
            max-wait: -1 #连接池最大等待阻塞时间
            min-idle: 0 #连接池中最小空闲数
         timeout: 5000 #访问超时时间

###### 3. 配置RedisTemplate ######

@Value("${spring.redis.cluster.nodes}")
    	private String host;
    	@Value("${spring.redis.password}")
    	private String password;
    	@Value("${spring.redis.timeout}")
    	private int connectionTimeout;
    	@Value("${spring.redis.jedis.pool.max-active}")
    	private int maxTotal;
    	@Value("${spring.redis.jedis.pool.min-idle}")
    	private int minIdle;
    	@Value("${spring.redis.jedis.pool.max-idle}")
    	private int maxIdle;
    	@Value("${spring.redis.jedis.pool.max-wait}")
    	private int maxWaitMillis;
    
    	@Bean
    	public RedisClusterConfiguration redisClusterConfiguration() { 
    		RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();
    		String[] hosts = host.split(",");
    		Set<RedisNode> nodeList = new HashSet<RedisNode>();
    		for (String hostAndPort : hosts) { 
    			String[] hostOrPort = hostAndPort.split(":");
    			nodeList.add(new RedisNode(hostOrPort[0], Integer.parseInt(hostOrPort[1])));
    		}
    		redisClusterConfiguration.setClusterNodes(nodeList);
    // redisClusterConfiguration.setMaxRedirects();
    		return redisClusterConfiguration;
    	}
    
    	@Bean
    	public JedisPoolConfig jedisPoolConfig() { 
    		JedisPoolConfig poolConfig = new JedisPoolConfig();
    		poolConfig.setMaxIdle(this.maxIdle);
    		poolConfig.setMinIdle(this.minIdle);
    		poolConfig.setTestOnCreate(true);
    		poolConfig.setTestOnBorrow(true);
    		poolConfig.setTestOnReturn(true);
    		poolConfig.setTestWhileIdle(true);
    		return poolConfig;
    	}
    
    	@Bean("myJedisConnectionFactory")
    	public JedisConnectionFactory jedisConnectionFactory(RedisClusterConfiguration redisClusterConfiguration,
    			JedisPoolConfig jedisPoolConfig) { 
    		JedisConnectionFactory jedisConnectionFactory = new JedisConnectionFactory(
    				redisClusterConfiguration, jedisPoolConfig);
    		jedisConnectionFactory.setPassword(password);
    		return jedisConnectionFactory;
    	}
    
    	@Bean
    	RedisTemplate<String, Serializable> redisTemplate(@Qualifier("myJedisConnectionFactory")JedisConnectionFactory jedisConnectionFactory) { 
    		RedisTemplate<String, Serializable> redisTemplate = new RedisTemplate<>();
    		redisTemplate.setConnectionFactory(jedisConnectionFactory);
    		Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
    		// 设置值（value）的序列化采用Jackson2JsonRedisSerializer。
    		redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
    		// 设置键（key）的序列化采用StringRedisSerializer。
    		redisTemplate.setKeySerializer(new StringRedisSerializer());
    		redisTemplate.setHashKeySerializer(new StringRedisSerializer());
    		redisTemplate.afterPropertiesSet();
    		return redisTemplate;
    	}
    
    
    	@Bean
    	public CacheManager cacheManager(@Qualifier("myJedisConnectionFactory")JedisConnectionFactory jedisConnectionFactory) { 
    		RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
    		RedisCacheConfiguration redisCacheConfiguration = config
    				.serializeKeysWith(
    						RedisSerializationContext.SerializationPair
    								.fromSerializer(new StringRedisSerializer()))
    				.serializeValuesWith(
    						RedisSerializationContext.SerializationPair
    								.fromSerializer(new GenericJackson2JsonRedisSerializer()));
    
    		return RedisCacheManager.builder(jeddisConnectionFactory)
    				.cacheDefaults(redisCacheConfiguration).build();
    	}

##### 大功告成! #####

项目中直接注入RedisTemplate就可以使用，具体网上步骤很多，在这里不展开来说。

本文只记录相关配置，后续有时间会做源码分析和大家分享，文中如有错误之处，欢迎指出。

[C_Users_gaobo2_AppData_Roaming_Typora_typora-user-images_image-20201205170147141.png]: /images/20221120/fdb57507895d41a38d23a9921e901faa.png
[20201205173426532.png_pic_center]: /images/20221120/ce3d52c7882545c2ac18a27ba70e287d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JpZ25pdUJPR0U_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/d415df08a16e4594b7564fdc5e5eca38.png