Method HExpire

structure/hash.go:431–465

HExpire sets a timeout on a hash. It takes a string key 'k' and a duration 'ttl' to set the timeout. It returns a boolean indicating the success of the operation and any possible error. Parameters: k: The key of the hash table. ttl: The duration of the timeout. Returns: bool: True if the time

(key string, ttl int64)

//	bool: True if the timeout was set successfully, false otherwise.
//	error: An error if occurred during the operation, or nil on success.
func (hs *HashStructure) HExpire(key string, ttl int64) (bool, error) {
	// Convert the parameters to bytes
	k := stringToBytesWithKey(key)

	// Check the parameters
	if len(k) == 0 {
		return false, _const.ErrKeyIsEmpty
	}

	// Find the hash metadata by the given key
	hashMeta, err := hs.findHashMeta(key, Hash)
	if err != nil {
		return false, err
	}

	// If the counter is 0, return false
	if hashMeta.counter == 0 {
		return false, nil
	}

	// Create a new write batch
	batch := hs.db.NewWriteBatch(config.DefaultWriteBatchOptions)

	// Put the updated hash metadata to the database
	hashMeta.expire = time.Now().Add(time.Duration(ttl) * time.Second).UnixNano()
	_ = batch.Put(k, hashMeta.encodeHashMeta())

	// Commit the write batch
	err = batch.Commit()
	if err != nil {
		return false, err
	}

	return true, nil
}

// HExists determines whether a hash field exists or not.
// It takes a string key 'k' and a field 'f' to check for existence.