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text_formatter.go
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/
text_formatter.go
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// Copyright 2016-2017 VMware, Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package log
import "github.com/Sirupsen/logrus"
// level strings padded to match the length of the longest level,
// which is "UNKNOWN" currently. Indexed according to levels in
// logrus, e.g. levelStrs[logrus.InfoLevel] == "INFO ".
var levelStrs = []string{
"PANIC",
"FATAL",
"ERROR",
"WARN ",
"INFO ",
"DEBUG",
}
const unknownLevel = "UNKWN"
type TextFormatter struct {
// TimestampFormat is the format used to print the timestamp. By default
// an RFC3339 timestamp is used.
TimestampFormat string
}
// NewTextFormatter returns a text formatter
func NewTextFormatter() *TextFormatter {
return &TextFormatter{
TimestampFormat: "Jan _2 2006 15:04:05.000Z07:00",
}
}
func levelToString(level logrus.Level) string {
if level <= logrus.DebugLevel {
return levelStrs[level]
}
return unknownLevel
}
func (f *TextFormatter) Format(entry *logrus.Entry) ([]byte, error) {
t := f.timeStamp(entry)
l := levelToString(entry.Level)
return []byte(t + " " + l + " " + entry.Message + "\n"), nil
}
func (f *TextFormatter) timeStamp(entry *logrus.Entry) string {
return entry.Time.Format(f.TimestampFormat)
}