WEQServer/internal/data/weather_cache.go

package data

import (
	"context"
	"github.com/go-redis/redis/v8"
	"time"
	"weather_and_earthquake/internal/config"
)

var _redis *redis.Client
var _expire time.Duration

// 初始化 redis 连接
func InitWeatherCache(ctx context.Context, data *config.Redis) error {
	_redis = redis.NewClient(&redis.Options{
		Addr:         data.Addr,
		Password:     data.Password,
		DB:           data.DB,
		ReadTimeout:  data.ReadTimeout * time.Second,
		WriteTimeout: data.WriteTimeout * time.Second,
		PoolSize:     data.PoolSize,
		MinIdleConns: data.MinIdleConns,
	})
	_expire = data.Expire

	_, err := _redis.Ping(ctx).Result()
	return err
}

// 设置某个地方的天气情况，默认保留1小时数据
func SetWeatherCondition(ctx context.Context, key, condition string) error {
	_, err := _redis.SetNX(ctx, key, condition, _expire*time.Second).Result()
	return err
}

// 查找某个地方的天气情况
func GetWeatherCondition(ctx context.Context, key string) (string, error) {
	value, err := _redis.Get(ctx, key).Result()
	if err == nil {
		return value, nil
	} else if err == redis.Nil {
		return "", nil
	} else {
		return "", err
	}
}