Spring Boot 多数据源 Redis 配置

概述

本文基于spring boot 2.0.7，讲解如何配置多数据源redis，采用lettuce做为redis客户端，并附上示例代码。

redis配置

配置文件

skyarthur:
  redis1:
    host: 127.0.0.1
    port: 6378
    lettuce:
      pool:
        min-idle: 5
        max-idle: 10
        max-active: 8
        max-wait: 1ms
      shutdown-timeout: 100ms
  redis2:
    host: 127.0.0.1
    port: 6379
    lettuce:
      pool:
        min-idle: 5
        max-idle: 10
        max-active: 8
        max-wait: 1ms
      shutdown-timeout: 100ms

共配置2个redis数据源，并采用 lettuce pool 做为redis客户端

配置类

package com.skyarthur.springboot.config;

import io.lettuce.core.resource.ClientResources;
import io.lettuce.core.resource.DefaultClientResources;
import lombok.Getter;
import lombok.Setter;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration;
import org.springframework.data.redis.core.StringRedisTemplate;

/**
 * Created by skyarthur on 2019-12-21
 */

@Configuration
@ConfigurationProperties(prefix = "skyarthur")
@Getter
@Setter
public class RedisConfig {

    private RedisProperties redis1;
    private RedisProperties redis2;

    @Bean(destroyMethod = "shutdown")
    @ConditionalOnMissingBean(ClientResources.class)
    public DefaultClientResources lettuceClientResources() {
        return DefaultClientResources.create();
    }

    @Bean(name = "stringRedisTemplate1")
    @Primary
    public StringRedisTemplate stringRedisTemplate1(
            @Qualifier("Redis1LettuceConnectionFactory") RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    @Bean(name = "Redis1LettuceConnectionFactory")
    @Primary
    public LettuceConnectionFactory Redis1LettuceConnectionFactory(ClientResources clientResources) {
        RedisStandaloneConfiguration redis1StandaloneConfiguration = getStandaloneConfig(redis1);
        LettuceClientConfiguration clientConfig = getLettuceClientConfiguration(clientResources, redis1);
        return new LettuceConnectionFactory(redis1StandaloneConfiguration, clientConfig);
    }

    @Bean(name = "stringRedisTemplate2")
    public StringRedisTemplate stringRedisTemplate2(
            @Qualifier("Redis2LettuceConnectionFactory") RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    @Bean(name = "Redis2LettuceConnectionFactory")
    public LettuceConnectionFactory Redis2LettuceConnectionFactory(ClientResources clientResources) {
        RedisStandaloneConfiguration redis1StandaloneConfiguration = getStandaloneConfig(redis2);
        LettuceClientConfiguration clientConfig = getLettuceClientConfiguration(clientResources, redis2);
        return new LettuceConnectionFactory(redis1StandaloneConfiguration, clientConfig);
    }


    /**
     * redis standalone config
     *
     * @param redisProperties redis 配置参数
     * @return RedisStandaloneConfiguration
     */
    private RedisStandaloneConfiguration getStandaloneConfig(RedisProperties redisProperties) {
        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
        config.setHostName(redisProperties.getHost());
        config.setPort(redisProperties.getPort());
        config.setPassword(RedisPassword.of(redisProperties.getPassword()));
        config.setDatabase(redisProperties.getDatabase());
        return config;
    }

    /**
     * 构建 LettuceClientConfiguration
     *
     * @param clientResources clientResources
     * @param redisProperties redisProperties
     * @return LettuceClientConfiguration
     */
    private LettuceClientConfiguration getLettuceClientConfiguration(ClientResources clientResources,
                                                                     RedisProperties redisProperties) {
        LettuceClientConfiguration.LettuceClientConfigurationBuilder builder =
                createBuilder(redisProperties.getLettuce().getPool());
        if (redisProperties.isSsl()) {
            builder.useSsl();
        }
        if (redisProperties.getTimeout() != null) {
            builder.commandTimeout(redisProperties.getTimeout());
        }
        if (redisProperties.getLettuce() != null) {
            RedisProperties.Lettuce lettuce = redisProperties.getLettuce();
            if (lettuce.getShutdownTimeout() != null
                    && !lettuce.getShutdownTimeout().isZero()) {
                builder.shutdownTimeout(
                        redisProperties.getLettuce().getShutdownTimeout());
            }
        }
        builder.clientResources(clientResources);
        return builder.build();
    }

    /**
     * 创建 LettuceClientConfigurationBuilder
     *
     * @param pool 连接池配置
     * @return LettuceClientConfigurationBuilder
     */
    private LettuceClientConfiguration.LettuceClientConfigurationBuilder createBuilder(RedisProperties.Pool pool) {
        if (pool == null) {
            return LettuceClientConfiguration.builder();
        }
        return LettucePoolingClientConfiguration.builder()
                .poolConfig(getPoolConfig(pool));
    }

    /**
     * pool config
     *
     * @param properties redis 参数配置
     * @return GenericObjectPoolConfig
     */
    private GenericObjectPoolConfig getPoolConfig(RedisProperties.Pool properties) {
        GenericObjectPoolConfig config = new GenericObjectPoolConfig();
        config.setMaxTotal(properties.getMaxActive());
        config.setMaxIdle(properties.getMaxIdle());
        config.setMinIdle(properties.getMinIdle());
        if (properties.getMaxWait() != null) {
            config.setMaxWaitMillis(properties.getMaxWait().toMillis());
        }
        return config;
    }
}

以上配置主要参考 spring 官方配置 RedisAutoConfiguration , LettuceConnectionConfiguration 。简单来说： RedisAutoConfiguration 注册了2个bean， RedisTemplate 和 StringRedisTemplate ，这两个bean又依赖 RedisConnectionFactory 的注入，在 RedisAutoConfiguration 可以看到， RedisConnectionFactory 有两个实现， LettuceConnectionFactory 和 JedisConnectionFactory ，具体可以直接参考官方配置 LettuceConnectionConfiguration

单测

package com.skyarthur.springboot.config;

import com.skyarthur.springboot.ApplicationTests;
import com.skyarthur.springboot.common.enums.RedisType;
import org.junit.Assert;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.StringRedisTemplate;

/**
 * Created by skyarthur on 2019-12-21
 */

public class RedisConfigTest extends ApplicationTests {

    @Autowired
    @Qualifier("stringRedisTemplate1")
    private StringRedisTemplate stringRedisTemplate1;

    @Autowired
    @Qualifier("stringRedisTemplate2")
    private StringRedisTemplate stringRedisTemplate2;

    @Test
    public void test() {
        LettuceConnectionFactory factory = (LettuceConnectionFactory) stringRedisTemplate1.getConnectionFactory();
        Assert.assertNotNull(factory);
        Assert.assertEquals(6378, factory.getPort());
        Assert.assertEquals("127.0.0.1", factory.getHostName());
        factory = (LettuceConnectionFactory) stringRedisTemplate2.getConnectionFactory();
        Assert.assertNotNull(factory);
        Assert.assertEquals(6379, factory.getPort());
        Assert.assertEquals("127.0.0.1", factory.getHostName());

        stringRedisTemplate1.opsForValue().set(RedisType.PERSON_INFO.getRealKey("test"), "6378");
        stringRedisTemplate2.opsForValue().set("test", "6379");

        Assert.assertEquals("6378", stringRedisTemplate1.opsForValue().get(RedisType.PERSON_INFO.getRealKey("test")));
        Assert.assertEquals("6379", stringRedisTemplate2.opsForValue().get("test"));
    }
}

示例代码