SpringCloud关于l2cache缓存

itwolf项目名称，springboot，springcloud，l2cache缓存

1、依赖

<dependency>    <groupId>com.coy.l2cache</groupId>    <artifactId>l2cache-spring-boot-starter</artifactId>    <version>1.0.13</version> </dependency>

2、代码配置

RedissonConfig.class

import com.alibaba.cloud.nacos.NacosConfigProperties; import com.alibaba.fastjson.JSONObject; import com.alibaba.nacos.api.exception.NacosException; import lombok.extern.slf4j.Slf4j; import org.redisson.Redisson; import org.redisson.api.RedissonClient; import org.redisson.codec.JsonJacksonCodec; import org.redisson.config.Config; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration;  import javax.annotation.Resource; import java.io.IOException; import java.io.InputStream;  /**  * Redisson 配置  *  * @author ITwolf  * @date 2022/01/22 15:32  */ @Slf4j @Configuration public class RedissonConfig {      /**      *      */     @Value("${redisson.yaml.config:redisson.yaml}")     private String redissonYamlConfig;      @Resource     NacosConfigProperties nacosConfigProperties;      @Bean     @ConditionalOnMissingBean({RedissonClient.class})     public RedissonClient redissonClient() throws IOException, NacosException {         // 这样可以获得springboot打包以后jar包中的资源文件         InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(this.redissonYamlConfig);         if (null != is) {             Config redissonConfig = Config.fromYAML(is);             return Redisson.create(redissonConfig);         }          // 扩展：针对redisson.yaml放到nacos统一配置管理后的扩展         NacosConfigProperties.Config nacosConfig = null;         log.info("打印读取nacos配置,{}", nacosConfigProperties);         log.info("打印读取redissonYamlConfig配置,{}", redissonYamlConfig);         for (NacosConfigProperties.Config config : nacosConfigProperties.getExtConfig()) {             if (redissonYamlConfig.equalsIgnoreCase(config.getDataId())) {                 nacosConfig = config;                 break;             }         }         String group = null != nacosConfig ? null : nacosConfig.getGroup();         String configYaml = nacosConfigProperties.configServiceInstance().getConfig(redissonYamlConfig, group, 3000);         log.info("read {} from nacos", redissonYamlConfig);         if (null == configYaml) {             throw new IllegalStateException("nacos "   redissonYamlConfig   " not config");         }          Config redissonConfig = Config.fromYAML(configYaml);         // 默认强制设置codec为JsonJacksonCodec，以便与旧系统和谐RedisTemplate的GenericJackson2JsonRedisSerializer序列化反序列化保持一致         redissonConfig.setCodec(new JsonJacksonCodec());         RedissonClient redissonClient = Redisson.create(redissonConfig);         return redissonClient;     } } 

cache.class

import com.coy.l2cache.Cache; import com.coy.l2cache.cache.CompositeCache; import com.coy.l2cache.cache.Level2Cache; import com.coy.l2cache.spring.L2CacheCacheManager; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component;   /**  * @author ITwolf  * @date 2022/01/20 15:00  */ @Component public class L2cache {      @Autowired     L2CacheCacheManager l2CacheCacheManager;      public Level2Cache getLevel2Cache(String cacheName) {          Cache l2cache = (Cache) l2CacheCacheManager.getCache(cacheName).getNativeCache();         if (l2cache instanceof Level2Cache) {             return (Level2Cache) l2cache;         }          if (l2cache instanceof CompositeCache) {             CompositeCache compositeCache = (CompositeCache) l2cache;             return compositeCache.getLevel2Cache();         }         throw new BusinessException("未找到Level2Cache对象，请检查缓存配置是否正确");     } } 

CacheService.class

/**  * 缓存 接口  * 基于业务维度的标准化缓存操作  *  * @param <K> 表示相关的业务要素可以是单个字段或对象。开发人员在实现类中定义自己。  * @param <R> 表示返回的缓存数据  * @author ITwolf  * @date 2022/01/20  12:36  */ public interface CacheService<K, R> {      /**      * 获取缓存名称      */     String getCacheName();      /**      * 构建缓存key      */     default String buildCacheKey(K key) {         return null;     }      /**      * 获取缓存      */     R get(K key);      /**      * 获取或加载缓存，如果缓存不存在，则从加载到缓存并返回      */     R getOrLoad(K key);      /**      * 设置指定key的缓存项      */     R put(K key, R value);      /**      * 以前没有存储指定key的value存储由指定进行key映射的指定value      */     default boolean putIfAbsent(K key, R value) {         retrn false;
    }

    /**
     * 重新加载缓存（存在则替换，不存在则设置）
     */
    R reload(K key);

    /**
     * 淘汰缓存
     */
    void evict(K key);

    /**
     * 判断key是否存在
     */
    boolean isExists(K key);
}

3、nacos配置

itwolf-redisson.yml

singleServerConfig:
  address: redis://localhost:6379
  password: 123456
  # default 10000 milliseconds
  idleConnectionTimeout: 10000
  # default 10000 milliseconds
  connectTimeout: 5000
  # default 3000 milliseconds
  timeout: 3000
  # default 3
  retryAttempts: 3
  # default 1500 milliseconds
  retryInterval: 1500
  # default 5
  subscriptionsPerConnection: 5
  # default null
  clientName: null
  # default 1
  subscriptionConnectionMinimumIdleSize: 1
  # default 50
  subscriptionConnectionPoolSize: 50
  # default 32
  connectionMinimumIdleSize: 32
  # default 64
  connectionPoolSize: 300
  # default 0
  database: 0
# default 16, 0 means current_processors_amount * 2
threads: 32
# default 32, 0 means current_processors_amount * 2
nettyThreads: 64
# key/value codec, default JsonJacksonCodec
# codec: !<org.redisson.codec.JsonJacksonCodec> {}

注：redis密码等参数按照相关信息配置好

itwolf.yaml

# l2 cache
l2cache:
  config:
    allowNullValues: true
    nullValueExpireTimeSeconds: 60
    # composite redis
    cacheType: redis
    composite:
      l1CacheType: caffeine
      l2CacheType: redis
    caffeine:
      autoRefreshExpireCache: true
      refreshPoolSize: 8
      refreshPeriod: 10
      defaultSpec: initialCapacity=16,maximumSize=5000,refreshAfterWrite=30m,recordStats
      specs:
        brandCache: initialCapacity=16,maximumSize=5000,refreshAfterWrite=30m,recordStats
    redis:
      tryLock: true
      # 5m=300000, 30m=1800000
      expireTime: 60000
      redissonYamlConfig: ${spring.application.name}-redisson.yml
    cacheSyncPolicy:
      type: redis
      topic: user_l2cache

要有远程服务  cn.xxxxx.service.user

UserFeignClient userFeignClient

以下是UserByUnionIdCacheService.class

package cn.xxxxx.rest.user.service.cache.user;

import cn.xxxxx.rest.user.service.cache.CacheService;
import cn.xxxxx.service.user.zax.feign.bo.UserBO;
import cn.xxxxx.service.user.zax.feign.client.UserFeignClient;
import cn.xxxxx.service.user.zax.feign.dto.UnionIdDTO;
import cn.xxxxx.util.common.result.JsonResult;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RBucket;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Component;

import java.util.concurrent.TimeUnit;

/**
 * @author ITwolf
 * @version 1.0
 * @date 2022/01/27 15:00
 */
@Component
@Slf4j
@RefreshScope
public class UserByUnionIdCacheService implements CacheService<String, UserBO>, IRefreshUserCache {

    @Autowired
    private UserFeignClient userFeignClient;

    @Autowired
    private RedissonClient redissonClient;

    // 缓存前缀
    public static final String CACHE_PREFIX = "userByUnionIdCache:";

    // 分隔符
    private static final String SPLIT = ":";

    /**
     * 缓存时间：秒
     */
    @Value("${user.cache.userByUnionIdCache.live.time:1800}")
    private Long liveTime;

    @Override
    public String getCacheName() {
        return CACHE_PREFIX;
    }

    @Override
    public String buildCacheKey(String dto) {
        StringBuffer key = new StringBuffer(CACHE_PREFIX);
        key.append(dto);
        return key.toString();
    }


    /**
     * 10:12 2022/01/27
     * 根据unionId查询店铺信息和店铺头像缓存
     *
     * @param dto unionId
     * @return cn.xxxxx.service.user.zax.feign.bo.OrganizationAndImageBO
     */
    @Override
    public UserBO get(String dto) {
        RBucket<UserBO> bucket = redissonClient.getBucket(buildCacheKey(dto));
        return bucket.get();
    }

    /**
     * 获取或者加载缓存
     * 16:20 2020/10/9
     *
     * @param dto unionId
     * @return cn.xxxxx.service.user.zax.feign.bo.UserBO
     */
    @Override
    public UserBO getOrLoad(String dto) {
        RBucket<UserBO> bucket = redissonClient.getBucket(buildCacheKey(dto));
        UserBO bo = bucket.get();
        if (null == bo) {
            return this.reload(dto);
        }
        return bo;
    }

    /**
     * 设置缓存
     * 10:12 2022/01/27
     *
     * @param dto unionId
     * @param bo  用户信息
     * @return cn.xxxxx.service.user.zax.feign.bo.UserBO
     */
    @Override
    public UserBO put(String dto, UserBO bo) {
        RBucket<UserBO> bucket = redissonClient.getBucket(buildCacheKey(dto));
        bucket.set(bo, liveTime, TimeUnit.SECONDS);
        log.debug("[put][UserBO] key={}, value={}, liveTime={}", this.buildCacheKey(dto), bo, liveTime);
        return bo;
    }

    /**
     * 更新用户对象
     * 10:12 2022/01/27
     *
     * @param dto unionId
     * @return cn.xxxxx.service.user.zax.feign.bo.UserBO
     */
    @Override
    public UserBO reload(String dto) {
        UserBO bo;
        JsonResult<UserBO> userBOJsonResult = userFeignClient.getByUnionId(new UnionIdDTO().setUnionId(dto));
        bo = userBOJsonResult.getDataSuc();
        if (null != bo) {
            return this.put(dto, bo);
        }
        return null;
    }

    /**
     * 删除缓存
     * 10:12 2022/01/27
     *
     * @param dto unionId
     */
    @Override
    public void evict(String dto) {
        RBucket<String> bucket = redissonClient.getBucket(buildCacheKey(dto));
        boolean rslt = bucket.delete();
        log.info("[evict][UserBO] key={}, result={}", this.buildCacheKey(dto), rslt);
    }

    /**
     * 判断缓存是否存在
     * 10:12 2022/01/27
     *
     * @param dto unionId
     * @return boolean
     */
    @Override
    public boolean isExists(String dto) {
        RBucket<String> bucket = redissonClient.getBucket(buildCacheKey(dto));
        return bucket.isExists();
    }

}