for {
		select {
		case entry, ok := <-diffCh:
			if !ok {
				return
			}
			if err := enc.Encode(entry); err != nil {
				return
			}
			if len(diffCh) == 0 {
				// Flush if nothing is queued
				w.(http.Flusher).Flush()
			}
		case <-keepAliveTicker.C:
			if len(diffCh) > 0 {
				continue
			}
			if _, err := w.Write([]byte(" ")); err != nil {
				return
			}

		return selected, true
	}

	// If we would never be able to reach read quorum.
	if objsValid < r.objQuorum {
		return nil, false
	}

	// If all objects agree.
	if selected != nil && objsAgree == objsValid {
		return selected, true
	}

	// If cached is nil we shall skip the entry.
	if selected.cached == nil {
		return nil, false
	}

	// Merge if we have disagreement.

				hdr, err := wsReader.NextFrame()
				if err != nil {
					return nil, err
				}
				if hdr.OpCode.IsControl() {
					if err := controlHandler(hdr, &wsReader); err != nil {
						return nil, err
					}
					continue
				}
				if hdr.OpCode&want == 0 {
					if err := wsReader.Discard(); err != nil {
						return nil, err
					}
					continue
				}
				if int64(cap(dst)) < hdr.Length+1 {

				if !update {
					if !isPtr {
						elem = elem.Elem()
					}
					if isArrayKind {
						if reflectValue.Len() >= int(db.RowsAffected) {
							reflectValue.Index(int(db.RowsAffected - 1)).Set(elem)
						}
					} else {
						reflectValue = reflect.Append(reflectValue, elem)
					}
				}
			}

			if !update {
				db.Statement.ReflectValue.Set(reflectValue)

	if dir == "" {
		dir = getDefaultDir()
	}

	if dir == "" {
		if !dirSet {
			return nil, fmt.Errorf("missing option must be provided")
		}
		return nil, fmt.Errorf("provided option cannot be empty")
	}

	// Disallow relative paths, figure out absolute paths.
	dirAbs, err := filepath.Abs(dir)
	if err != nil {
		return nil, err
	}
	err = mkdirAllIgnorePerm(dirAbs)
	if err != nil {

     * @param dataCrawlEndTime The parameter value of dataCrawlEndTime. (NotNull)
     */
    public void setDataCrawlEndTime(String dataCrawlEndTime) {
        registerVariable("dataCrawlEndTime", dataCrawlEndTime);
    }

    /**
     * Set the value of dataCrawlExecTime, used in parameter comment. <br>
     * Even if empty string, treated as empty plainly. So "IF pmb != null" is false if empty.

// kmsKeyIDFromMetadata returns any AWS S3 KMS key ID in the
// metadata, if any. It returns an empty ID if no key ID is
// present.
func kmsKeyIDFromMetadata(metadata map[string]string) string {
	const ARNPrefix = crypto.ARNPrefix
	if len(metadata) == 0 {
		return ""
	}
	kmsID, ok := metadata[crypto.MetaKeyID]
	if !ok {
		return ""
	}
	if strings.HasPrefix(kmsID, ARNPrefix) {
		return kmsID
	}

}

// Validate PostgreSQLArgs fields
func (p PostgreSQLArgs) Validate() error {
	if !p.Enable {
		return nil
	}
	if p.Table == "" {
		return fmt.Errorf("empty table name")
	}
	if err := validatePsqlTableName(p.Table); err != nil {
		return err
	}

	if p.Format != "" {
		f := strings.ToLower(p.Format)
		if f != event.NamespaceFormat && f != event.AccessFormat {

			for _, alias := range aliases {
				if strings.HasPrefix(fullDataType, alias) {
					isSameType = true
					break
				}
			}

			if !isSameType {
				alterColumn = true
			}
		}
	}

	if !isSameType {
		// check size
		if length, ok := columnType.Length(); length != int64(field.Size) {
			if length > 0 && field.Size > 0 {
				alterColumn = true
			} else {

			if err != nil {
				err = msgp.WrapError(err, "Path")
				return
			}
		case "Endpoint":
			z.Endpoint, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Endpoint")
				return
			}
		case "Started":
			z.Started, err = dc.ReadTime()
			if err != nil {
				err = msgp.WrapError(err, "Started")
				return
			}
		case "LastUpdate":
			z.LastUpdate, err = dc.ReadTime()
			if err != nil {