feat加入redis工具包

lib/core/redis/redis.go

@@ -0,0 +1,237 @@
+package redis
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"ems.agt/lib/core/conf"
+	"ems.agt/lib/log"
+	"github.com/redis/go-redis/v9"
+)
+
+// Redis连接实例
+var rdb *redis.Client
+
+// 声明定义限流脚本命令
+var rateLimitCommand = redis.NewScript(`
+local key = KEYS[1]
+local time = tonumber(ARGV[1])
+local count = tonumber(ARGV[2])
+local current = redis.call('get', key);
+if current and tonumber(current) >= count then
+	return tonumber(current);
+end
+current = redis.call('incr', key)
+if tonumber(current) == 1 then 
+	redis.call('expire', key, time)
+end
+return tonumber(current);`)
+
+// 连接Redis实例
+func Connect() {
+	ctx := context.Background()
+	client := conf.Get("redis").(map[string]any)
+	address := fmt.Sprintf("%s:%d", client["host"], client["port"])
+	// 创建连接
+	rdb = redis.NewClient(&redis.Options{
+		Addr:     address,
+		Password: client["password"].(string),
+		DB:       client["db"].(int),
+	})
+	// 测试数据库连接
+	pong, err := rdb.Ping(ctx).Result()
+	if err != nil {
+		log.Fatalf("failed error ping redis: %v", err)
+	}
+	log.Infof("redis %s connection is successful.", pong)
+}
+
+// 关闭Redis实例
+func Close() {
+	if err := rdb.Close(); err != nil {
+		log.Fatalf("fatal error db close: %s", err)
+	}
+}
+
+// Info 获取redis服务信息
+func Info() map[string]map[string]string {
+	ctx := context.Background()
+	info, err := rdb.Info(ctx).Result()
+	if err != nil {
+		return map[string]map[string]string{}
+	}
+	infoObj := make(map[string]map[string]string)
+	lines := strings.Split(info, "\r\n")
+	label := ""
+	for _, line := range lines {
+		if strings.Contains(line, "#") {
+			label = strings.Fields(line)[len(strings.Fields(line))-1]
+			label = strings.ToLower(label)
+			infoObj[label] = make(map[string]string)
+			continue
+		}
+		kvArr := strings.Split(line, ":")
+		if len(kvArr) >= 2 {
+			key := strings.TrimSpace(kvArr[0])
+			value := strings.TrimSpace(kvArr[len(kvArr)-1])
+			infoObj[label][key] = value
+		}
+	}
+	return infoObj
+}
+
+// KeySize 获取redis当前连接可用键Key总数信息
+func KeySize() int64 {
+	ctx := context.Background()
+	size, err := rdb.DBSize(ctx).Result()
+	if err != nil {
+		return 0
+	}
+	return size
+}
+
+// CommandStats 获取redis命令状态信息
+func CommandStats() []map[string]string {
+	ctx := context.Background()
+	commandstats, err := rdb.Info(ctx, "commandstats").Result()
+	if err != nil {
+		return []map[string]string{}
+	}
+	statsObjArr := make([]map[string]string, 0)
+	lines := strings.Split(commandstats, "\r\n")
+	for _, line := range lines {
+		if !strings.HasPrefix(line, "cmdstat_") {
+			continue
+		}
+		kvArr := strings.Split(line, ":")
+		key := kvArr[0]
+		valueStr := kvArr[len(kvArr)-1]
+		statsObj := make(map[string]string)
+		statsObj["name"] = key[8:]
+		statsObj["value"] = valueStr[6:strings.Index(valueStr, ",usec=")]
+		statsObjArr = append(statsObjArr, statsObj)
+	}
+	return statsObjArr
+}
+
+// 获取键的剩余有效时间（秒）
+func GetExpire(key string) float64 {
+	ctx := context.Background()
+	ttl, err := rdb.TTL(ctx, key).Result()
+	if err != nil {
+		return 0
+	}
+	return ttl.Seconds()
+}
+
+// 获得缓存数据的key列表
+func GetKeys(pattern string) []string {
+	// 初始化变量
+	var keys []string
+	var cursor uint64 = 0
+	ctx := context.Background()
+	// 循环遍历获取匹配的键
+	for {
+		// 使用 SCAN 命令获取匹配的键
+		batchKeys, nextCursor, err := rdb.Scan(ctx, cursor, pattern, 100).Result()
+		if err != nil {
+			log.Errorf("Failed to scan keys: %v", err)
+			break
+		}
+		cursor = nextCursor
+		keys = append(keys, batchKeys...)
+		// 当 cursor 为 0，表示遍历完成
+		if cursor == 0 {
+			break
+		}
+	}
+	return keys
+}
+
+// 批量获得缓存数据
+func GetBatch(keys []string) []any {
+	if len(keys) == 0 {
+		return []any{}
+	}
+	// 获取缓存数据
+	result, err := rdb.MGet(context.Background(), keys...).Result()
+	if err != nil {
+		log.Errorf("Failed to get batch data: %v", err)
+		return []any{}
+	}
+	return result
+}
+
+// 获得缓存数据
+func Get(key string) string {
+	ctx := context.Background()
+	value, err := rdb.Get(ctx, key).Result()
+	if err == redis.Nil || err != nil {
+		return ""
+	}
+	return value
+}
+
+// 获得缓存数据Hash
+func GetHash(key string) map[string]string {
+	ctx := context.Background()
+	value, err := rdb.HGetAll(ctx, key).Result()
+	if err == redis.Nil || err != nil {
+		return map[string]string{}
+	}
+	return value
+}
+
+// 判断是否存在
+func Has(keys ...string) bool {
+	ctx := context.Background()
+	exists, err := rdb.Exists(ctx, keys...).Result()
+	if err != nil {
+		return false
+	}
+	return exists >= 1
+}
+
+// 设置缓存数据
+func Set(key string, value any) bool {
+	ctx := context.Background()
+	err := rdb.Set(ctx, key, value, 0).Err()
+	return err == nil
+}
+
+// 设置缓存数据与过期时间
+func SetByExpire(key string, value any, expiration time.Duration) bool {
+	ctx := context.Background()
+	err := rdb.Set(ctx, key, value, expiration).Err()
+	return err == nil
+}
+
+// 删除单个
+func Del(key string) bool {
+	ctx := context.Background()
+	err := rdb.Del(ctx, key).Err()
+	return err == nil
+}
+
+// 删除多个
+func DelKeys(keys []string) bool {
+	if len(keys) == 0 {
+		return false
+	}
+	ctx := context.Background()
+	err := rdb.Del(ctx, keys...).Err()
+	return err == nil
+}
+
+// 限流查询并记录
+func RateLimit(limitKey string, time, count int64) int64 {
+	ctx := context.Background()
+	result, err := rateLimitCommand.Run(ctx, rdb, []string{limitKey}, time, count).Result()
+	if err != nil {
+		log.Errorf("redis lua script err %v", err)
+		return 0
+	}
+	return result.(int64)
+}