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58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// Copyright 2020 Kentaro Hibino. All rights reserved.
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// Use of this source code is governed by a MIT license
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// that can be found in the LICENSE file.
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// Package log exports logging related types and functions.
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package log
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import (
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"io"
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stdlog "log"
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"os"
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)
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// NewLogger creates and returns a new instance of Logger.
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func NewLogger(out io.Writer) *Logger {
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return &Logger{
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stdlog.New(out, "", stdlog.Ldate|stdlog.Ltime|stdlog.Lmicroseconds|stdlog.LUTC),
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}
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}
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// Logger is a wrapper object around log.Logger from the standard library.
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// It supports logging at various log levels.
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type Logger struct {
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*stdlog.Logger
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}
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// Debug logs a message at Debug level.
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func (l *Logger) Debug(format string, args ...interface{}) {
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format = "DEBUG: " + format
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l.Printf(format, args...)
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}
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// Info logs a message at Info level.
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func (l *Logger) Info(format string, args ...interface{}) {
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format = "INFO: " + format
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l.Printf(format, args...)
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}
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// Warn logs a message at Warning level.
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func (l *Logger) Warn(format string, args ...interface{}) {
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format = "WARN: " + format
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l.Printf(format, args...)
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}
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// Error logs a message at Error level.
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func (l *Logger) Error(format string, args ...interface{}) {
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format = "ERROR: " + format
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l.Printf(format, args...)
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}
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// Fatal logs a message at Fatal level
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// and process will exit with status set to 1.
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func (l *Logger) Fatal(format string, args ...interface{}) {
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format = "FATAL: " + format
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l.Printf(format, args...)
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os.Exit(1)
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}
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