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【tower-boot 系列】redis集成

article 2024/9/23 6:22:04

redis 介绍

Redis是一种支持key-value等多种数据结构的存储系统。可用于缓存，事件发布或订阅，高速队列等场景。支持网络，提供字符串，哈希，列表，队列，集合结构直接存取，基于内存，可持久化。

redis 集成

一、核心装配

1、RedisTemplate 注入

 @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory,
                                                       ObjectMapper objectMapper, KeyStringSerializer keyStringSerializer) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        //key序列化方式
        RedisSerializer<String> defalutSerializer = template.getStringSerializer();
        //值序列化方式
        RedisSerializer<Object> jsonRedisSerializer = new GenericJackson2JsonRedisSerializer(objectMapper);
        //设置key 的序列化方式
        template.setKeySerializer(keyStringSerializer);
        template.setHashKeySerializer(keyStringSerializer);
        //设置值 的序列化方式
        template.setValueSerializer(jsonRedisSerializer);
        template.setHashValueSerializer(jsonRedisSerializer);
        //设置默认的序列化方式
        template.setDefaultSerializer(defalutSerializer);
        template.afterPropertiesSet();
        return template;
    }

2、自自定义key 序列化 , redisKeyPrefix前缀兼容多项目隔离

@Slf4j
public class KeyStringSerializer implements RedisSerializer<String> {

    private final Charset charset;

    public KeyStringSerializer() {
        this.charset = StandardCharsets.UTF_8;
    }

    @Autowired
    private CustomRedisProperties redisProperties;

    @Override
    public byte[] serialize(String s) throws SerializationException {
        String newValue = getKeyPrefix() + s;
        return newValue.getBytes(charset);
    }

    @Override
    public String deserialize(byte[] bytes) throws SerializationException {
        String saveKey = new String(bytes, charset);
        String keyPrefix = getKeyPrefix();
        if (StrUtil.isNotBlank(keyPrefix)) {
            int indexOf = saveKey.indexOf(keyPrefix);
            if (indexOf > 0) {
                log.info("key缺少前缀");
            } else {
                saveKey = saveKey.substring(indexOf);
            }
            log.info("saveKey:{}", saveKey);
        }
        return saveKey;
    }

    private String getKeyPrefix() {
        return redisProperties.getRedisKeyPrefix();
    }

二、redis操作封装

注入bean实例，方便引用

    @Bean
    public RedisService redisService(ObjectMapper objectMapper, RedisTemplate<String, Object> redisTemplate) {
        return new DefaultRedisServiceImpl(objectMapper, redisTemplate);
    }

RedisService 接口实现

package com.hxl.redis.load;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**
 * @Author hxl
 * @description
 * @Date 2023-06-14 16:19
 **/
public interface RedisService {

    /**
     * *公共基础操作*
     **/
    Boolean exists(String key);

    Boolean expire(String key, long timeout);

    Boolean expire(final String key, final long timeout, final TimeUnit unit);

    int delete(String... keys);

    Boolean delete(String key);

    /**
     * *基础类型(Integer、String、实体类等) 操作*
     **/
    Boolean set(String key, Object value);

    Boolean set(String key, Object value, long expireTime);

    Boolean set(String key, Object value, long expireTime, TimeUnit timeUnit);

    String get(String key);

    <T> T getObject(String key, Class<T> type);

    <T> List<T> getObjectList(String key, Class<T> type);

    /**
     * *双向列表 list操作*
     **/
    Long setCacheList(String key, Object value);

    Long setCacheList(String key, List<Object> values);

    Long setLeftCacheList(String key, Object value);

    Long setLeftCacheList(String key, List<Object> values);

    <T> T rightPop(String key, Class<T> type);

    <T> T leftPop(String key, Class<T> type);

    <T> List<T> getCacheList(String key, Class<T> type);

    Long size(String key);

    /**
     * *hash map操作*
     */
    Boolean hPut(String key, String hashKey, Object value);

    Boolean hPutAll(String key, Map<String, String> maps);

    Boolean hExists(String key, String field);

    Long hDelete(String key, Object... fields);

    Map<Object, Object> hGetAll(String key);

    Object hGet(String key, String field);

    List<Object> hMultiGet(String key, Collection<Object> fields);

    Long hSize(String key);

    /**
     * *set 集合 不重复*
     */
    boolean addSet(String key, Object value);

    boolean removeSet(String key, Object... value);

    Set<Object> getAllSet(String key);

    /**
     * *set 有序集合 不重复*
     */
    Boolean addZSet(String key, Object value, double score);

    Long removeZSet(String key, Object... value);

    /**
     * ZSet数据增加分数
     *
     * @param key   key
     * @param value value
     * @param delta 分数
     * @return duuble
     */
    Double incrZSet(String key, Object value, double delta);

    /**
     * 升序 区间查询
     *
     * @param key key
     * @param min 最小分数
     * @param max 最大分数
     * @return Set<Object>
     */
    Set<Object> zSetRangeByScore(String key, double min, double max);

    /**
     * 降序 区间查询
     *
     * @param key key
     * @param min 最小分数
     * @param max 最大分数
     * @return Set<Object>
     */
    Set<Object> zSetRangeDescByScore(String key, double min, double max);
}

具实现见：DefaultRedisServiceImpl

三、使用方法

1、pom 依赖

<dependency>
     <groupId>com.hxl</groupId>
      <artifactId>tower-boot-redis</artifactId>
      <version>1.0.0-SNAPSHOT</version>
</dependency>

2、yml 配置

edisKeyPrefix 项目前缀,会默认拼接key前缀

spring:
    redis:
      host: 127.0.0.1
      port: 6379
      database: 0
      password:
      timeout: 5000
      lettuce:
        pool:
          max-active: 8
          max-idle: 8
          max-wait: -1
          min-idle: 0
      redisKeyPrefix: tower