谷粒商城缓存(二十三)

@Override
    //会内存异常，主要就是lettuce的bug，导致内存溢出,它是使用netty进行网络通信
    //luttuce的bug导致netty堆外内存溢出 -Xmx300m;netty如没有指定，默认是-Xmx300m
    //不能使用-Dio.netty.maxDirectMemory只去调大堆外内存
    //1.升级Luttuce客户端， 2切换jedis
    public Map<String, List<Catalog2Vo>> getCatalogJson() {
        String catalogJSON = stringRedisTemplate.opsForValue().get("catalogJSON");
        if(StringUtils.isBlank("catalogJSON") || catalogJSON == null){
            Map<String, List<Catalog2Vo>> catalogJsonFromDb = getCatalogJsonFromDb();
            String s = JSON.toJSONString(catalogJsonFromDb);
            stringRedisTemplate.opsForValue().set("catalogJSON",s,1,TimeUnit.DAYS);
            return catalogJsonFromDb;
        }
        Map<String, List<Catalog2Vo>> map = JSON.parseObject(catalogJSON, new TypeReference<Map<String, List<Catalog2Vo>>>() {
        });
        return map;
    }

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>io.lettuce</groupId>
                    <artifactId>lettuce-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
        </dependency>