Anand Babu (AB) Periasamy
9 years ago
parent
4495c2d8d8
commit
6930e4d668
@ -1,391 +0,0 @@ |
|||||||
//
|
|
||||||
// Minio Cloud Storage, (C) 2015 Minio, Inc.
|
|
||||||
//
|
|
||||||
// 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.
|
|
||||||
|
|
||||||
// Copyright 2009 The Go Authors. All rights reserved.
|
|
||||||
// Use of this source code is governed by a BSD-style
|
|
||||||
// license that can be found in the LICENSE file.
|
|
||||||
// Golang project:
|
|
||||||
// https://github.com/golang/go/blob/master/LICENSE
|
|
||||||
|
|
||||||
// Using this part of Minio codebase under the license
|
|
||||||
// Apache License Version 2.0 with modifications
|
|
||||||
|
|
||||||
// Package log implements a simple logging package. It defines a type, Logger,
|
|
||||||
// with methods for formatting output. It also has a predefined 'standard'
|
|
||||||
// Logger accessible through helper functions Print[f|ln], Fatal[f|ln], and
|
|
||||||
// Panic[f|ln], which are easier to use than creating a Logger manually.
|
|
||||||
// That logger writes to standard error and prints the date and time
|
|
||||||
// of each logged message.
|
|
||||||
// The Fatal functions call os.Exit(1) after writing the log message.
|
|
||||||
// The Panic functions call panic after writing the log message.
|
|
||||||
package log |
|
||||||
|
|
||||||
import ( |
|
||||||
"fmt" |
|
||||||
"io" |
|
||||||
"os" |
|
||||||
"runtime" |
|
||||||
"sync" |
|
||||||
"time" |
|
||||||
) |
|
||||||
|
|
||||||
// These flags define which text to prefix to each log entry generated by the Logger.
|
|
||||||
// Bits or'ed together to control what's printed. There is no control over the
|
|
||||||
// order they appear (the order listed here) or the format they present (as
|
|
||||||
// described in the comments). A colon appears after these items:
|
|
||||||
// 2009/01/23 01:23:23.123123 /a/b/c/d.go:23: message
|
|
||||||
const ( |
|
||||||
Ldate = 1 << iota // the date: 2009/01/23
|
|
||||||
Ltime |
|
||||||
Lmicroseconds // microsecond resolution: 01:23:23.123123. assumes Ltime.
|
|
||||||
Llongfile // full file name and line number: /a/b/c/d.go:23
|
|
||||||
Lshortfile // final file name element and line number: d.go:23. overrides Llongfile
|
|
||||||
LstdFlags = Ldate | Ltime // initial values for the standard logger
|
|
||||||
) |
|
||||||
|
|
||||||
// A Logger represents an active logging object that generates lines of
|
|
||||||
// output to an io.Writer. Each logging operation makes a single call to
|
|
||||||
// the Writer's Write method. A Logger can be used simultaneously from
|
|
||||||
// multiple goroutines; it guarantees to serialize access to the Writer.
|
|
||||||
type Logger struct { |
|
||||||
mu sync.Mutex // ensures atomic writes; protects the following fields
|
|
||||||
prefix string // prefix to write at beginning of each line
|
|
||||||
flag int // properties
|
|
||||||
out io.Writer // destination for output
|
|
||||||
buf []byte // for accumulating text to write
|
|
||||||
} |
|
||||||
|
|
||||||
// New creates a new Logger. The out variable sets the
|
|
||||||
// destination to which log data will be written.
|
|
||||||
// The prefix appears at the beginning of each generated log line.
|
|
||||||
// The flag argument defines the logging properties.
|
|
||||||
func New(out io.Writer, prefix string, flag int) *Logger { |
|
||||||
return &Logger{out: out, prefix: prefix, flag: flag} |
|
||||||
} |
|
||||||
|
|
||||||
var std = New(os.Stderr, "", LstdFlags) |
|
||||||
|
|
||||||
// Error is an error logger
|
|
||||||
var Error = New(os.Stderr, "", 0) |
|
||||||
|
|
||||||
// Debug is an error logger
|
|
||||||
var Debug = New(os.Stderr, "", 0) |
|
||||||
|
|
||||||
// Trace is an error logger
|
|
||||||
var Trace = New(os.Stderr, "", 0) |
|
||||||
|
|
||||||
// Cheap integer to fixed-width decimal ASCII. Give a negative width to avoid zero-padding.
|
|
||||||
// Knows the buffer has capacity.
|
|
||||||
func itoa(buf *[]byte, i int, wid int) { |
|
||||||
var u = uint(i) |
|
||||||
if u == 0 && wid <= 1 { |
|
||||||
*buf = append(*buf, '0') |
|
||||||
return |
|
||||||
} |
|
||||||
|
|
||||||
// Assemble decimal in reverse order.
|
|
||||||
var b [32]byte |
|
||||||
bp := len(b) |
|
||||||
for ; u > 0 || wid > 0; u /= 10 { |
|
||||||
bp-- |
|
||||||
wid-- |
|
||||||
b[bp] = byte(u%10) + '0' |
|
||||||
} |
|
||||||
*buf = append(*buf, b[bp:]...) |
|
||||||
} |
|
||||||
|
|
||||||
func (l *Logger) formatHeader(buf *[]byte, t time.Time, file string, line int) { |
|
||||||
*buf = append(*buf, l.prefix...) |
|
||||||
if l.flag&(Ldate|Ltime|Lmicroseconds) != 0 { |
|
||||||
if l.flag&Ldate != 0 { |
|
||||||
year, month, day := t.Date() |
|
||||||
itoa(buf, year, 4) |
|
||||||
*buf = append(*buf, '/') |
|
||||||
itoa(buf, int(month), 2) |
|
||||||
*buf = append(*buf, '/') |
|
||||||
itoa(buf, day, 2) |
|
||||||
*buf = append(*buf, ' ') |
|
||||||
} |
|
||||||
if l.flag&(Ltime|Lmicroseconds) != 0 { |
|
||||||
hour, min, sec := t.Clock() |
|
||||||
itoa(buf, hour, 2) |
|
||||||
*buf = append(*buf, ':') |
|
||||||
itoa(buf, min, 2) |
|
||||||
*buf = append(*buf, ':') |
|
||||||
itoa(buf, sec, 2) |
|
||||||
if l.flag&Lmicroseconds != 0 { |
|
||||||
*buf = append(*buf, '.') |
|
||||||
itoa(buf, t.Nanosecond()/1e3, 6) |
|
||||||
} |
|
||||||
*buf = append(*buf, ' ') |
|
||||||
} |
|
||||||
} |
|
||||||
if l.flag&(Lshortfile|Llongfile) != 0 { |
|
||||||
if l.flag&Lshortfile != 0 { |
|
||||||
short := file |
|
||||||
for i := len(file) - 1; i > 0; i-- { |
|
||||||
if file[i] == '/' { |
|
||||||
short = file[i+1:] |
|
||||||
break |
|
||||||
} |
|
||||||
} |
|
||||||
file = short |
|
||||||
} |
|
||||||
*buf = append(*buf, file...) |
|
||||||
*buf = append(*buf, ':') |
|
||||||
itoa(buf, line, -1) |
|
||||||
*buf = append(*buf, ": "...) |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
// Output writes the output for a logging event. The string s contains
|
|
||||||
// the text to print after the prefix specified by the flags of the
|
|
||||||
// Logger. A newline is appended if the last character of s is not
|
|
||||||
// already a newline. Calldepth is used to recover the PC and is
|
|
||||||
// provided for generality, although at the moment on all pre-defined
|
|
||||||
// paths it will be 2.
|
|
||||||
func (l *Logger) Output(calldepth int, s string) error { |
|
||||||
now := time.Now() // get this early.
|
|
||||||
var file string |
|
||||||
var line int |
|
||||||
l.mu.Lock() |
|
||||||
defer l.mu.Unlock() |
|
||||||
if l.flag&(Lshortfile|Llongfile) != 0 { |
|
||||||
// release lock while getting caller info - it's expensive.
|
|
||||||
l.mu.Unlock() |
|
||||||
var ok bool |
|
||||||
_, file, line, ok = runtime.Caller(calldepth) |
|
||||||
if !ok { |
|
||||||
file = "???" |
|
||||||
line = 0 |
|
||||||
} |
|
||||||
l.mu.Lock() |
|
||||||
} |
|
||||||
l.buf = l.buf[:0] |
|
||||||
l.formatHeader(&l.buf, now, file, line) |
|
||||||
l.buf = append(l.buf, s...) |
|
||||||
if len(s) > 0 && s[len(s)-1] != '\n' { |
|
||||||
l.buf = append(l.buf, '\n') |
|
||||||
} |
|
||||||
_, err := l.out.Write(l.buf) |
|
||||||
return err |
|
||||||
} |
|
||||||
|
|
||||||
// Printf calls l.Output to print to the logger.
|
|
||||||
// Arguments are handled in the manner of fmt.Printf.
|
|
||||||
func (l *Logger) Printf(format string, v ...interface{}) { |
|
||||||
l.Output(2, fmt.Sprintf(format, v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Print calls l.Output to print to the logger.
|
|
||||||
// Arguments are handled in the manner of fmt.Print.
|
|
||||||
func (l *Logger) Print(v ...interface{}) { |
|
||||||
l.Output(2, fmt.Sprint(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Println calls l.Output to print to the logger.
|
|
||||||
// Arguments are handled in the manner of fmt.Println.
|
|
||||||
func (l *Logger) Println(v ...interface{}) { |
|
||||||
l.Output(2, fmt.Sprintln(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Fatal is equivalent to l.Print() followed by a call to os.Exit(1).
|
|
||||||
func (l *Logger) Fatal(v ...interface{}) { |
|
||||||
l.SetPrefix("FATAL:") |
|
||||||
l.Output(2, fmt.Sprint(v...)) |
|
||||||
os.Exit(1) |
|
||||||
} |
|
||||||
|
|
||||||
// Fatalf is equivalent to l.Printf() followed by a call to os.Exit(1).
|
|
||||||
func (l *Logger) Fatalf(format string, v ...interface{}) { |
|
||||||
l.SetPrefix("FATAL:") |
|
||||||
l.Output(2, fmt.Sprintf(format, v...)) |
|
||||||
os.Exit(1) |
|
||||||
} |
|
||||||
|
|
||||||
// Fatalln is equivalent to l.Println() followed by a call to os.Exit(1).
|
|
||||||
func (l *Logger) Fatalln(v ...interface{}) { |
|
||||||
l.SetPrefix("FATAL:") |
|
||||||
l.Output(2, fmt.Sprintln(v...)) |
|
||||||
os.Exit(1) |
|
||||||
} |
|
||||||
|
|
||||||
// Error is equivalent to l.Print() followed by a call to os.Exit(1).
|
|
||||||
func (l *Logger) Error(v ...interface{}) { |
|
||||||
l.SetPrefix("ERROR:") |
|
||||||
l.Output(2, fmt.Sprint(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Errorf is equivalent to l.Printf() followed by a call to os.Exit(1).
|
|
||||||
func (l *Logger) Errorf(format string, v ...interface{}) { |
|
||||||
l.SetPrefix("ERROR:") |
|
||||||
l.Output(2, fmt.Sprintf(format, v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Errorln is equivalent to l.Println() followed by a call to os.Exit(1).
|
|
||||||
func (l *Logger) Errorln(v ...interface{}) { |
|
||||||
l.SetPrefix("ERROR:") |
|
||||||
l.Output(2, fmt.Sprintln(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Panic is equivalent to l.Print() followed by a call to panic().
|
|
||||||
func (l *Logger) Panic(v ...interface{}) { |
|
||||||
s := fmt.Sprint(v...) |
|
||||||
l.Output(2, s) |
|
||||||
panic(s) |
|
||||||
} |
|
||||||
|
|
||||||
// Panicf is equivalent to l.Printf() followed by a call to panic().
|
|
||||||
func (l *Logger) Panicf(format string, v ...interface{}) { |
|
||||||
s := fmt.Sprintf(format, v...) |
|
||||||
l.Output(2, s) |
|
||||||
panic(s) |
|
||||||
} |
|
||||||
|
|
||||||
// Panicln is equivalent to l.Println() followed by a call to panic().
|
|
||||||
func (l *Logger) Panicln(v ...interface{}) { |
|
||||||
s := fmt.Sprintln(v...) |
|
||||||
l.Output(2, s) |
|
||||||
panic(s) |
|
||||||
} |
|
||||||
|
|
||||||
// Flags returns the output flags for the logger.
|
|
||||||
func (l *Logger) Flags() int { |
|
||||||
l.mu.Lock() |
|
||||||
defer l.mu.Unlock() |
|
||||||
return l.flag |
|
||||||
} |
|
||||||
|
|
||||||
// SetFlags sets the output flags for the logger.
|
|
||||||
func (l *Logger) SetFlags(flag int) { |
|
||||||
l.mu.Lock() |
|
||||||
defer l.mu.Unlock() |
|
||||||
l.flag = flag |
|
||||||
} |
|
||||||
|
|
||||||
// Prefix returns the output prefix for the logger.
|
|
||||||
func (l *Logger) Prefix() string { |
|
||||||
l.mu.Lock() |
|
||||||
defer l.mu.Unlock() |
|
||||||
return l.prefix |
|
||||||
} |
|
||||||
|
|
||||||
// SetPrefix sets the output prefix for the logger.
|
|
||||||
func (l *Logger) SetPrefix(prefix string) { |
|
||||||
l.mu.Lock() |
|
||||||
defer l.mu.Unlock() |
|
||||||
l.prefix = prefix |
|
||||||
} |
|
||||||
|
|
||||||
// SetOutput sets the output destination for the standard logger.
|
|
||||||
func SetOutput(w io.Writer) { |
|
||||||
std.mu.Lock() |
|
||||||
defer std.mu.Unlock() |
|
||||||
std.out = w |
|
||||||
} |
|
||||||
|
|
||||||
// Flags returns the output flags for the standard logger.
|
|
||||||
func Flags() int { |
|
||||||
return std.Flags() |
|
||||||
} |
|
||||||
|
|
||||||
// SetFlags sets the output flags for the standard logger.
|
|
||||||
func SetFlags(flag int) { |
|
||||||
std.SetFlags(flag) |
|
||||||
} |
|
||||||
|
|
||||||
// Prefix returns the output prefix for the standard logger.
|
|
||||||
func Prefix() string { |
|
||||||
return std.Prefix() |
|
||||||
} |
|
||||||
|
|
||||||
// SetPrefix sets the output prefix for the standard logger.
|
|
||||||
func SetPrefix(prefix string) { |
|
||||||
std.SetPrefix(prefix) |
|
||||||
} |
|
||||||
|
|
||||||
// These functions write to the standard logger.
|
|
||||||
|
|
||||||
// Print calls Output to print to the standard logger.
|
|
||||||
// Arguments are handled in the manner of fmt.Print.
|
|
||||||
func Print(v ...interface{}) { |
|
||||||
std.Output(2, fmt.Sprint(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Printf calls Output to print to the standard logger.
|
|
||||||
// Arguments are handled in the manner of fmt.Printf.
|
|
||||||
func Printf(format string, v ...interface{}) { |
|
||||||
std.Output(2, fmt.Sprintf(format, v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Println calls Output to print to the standard logger.
|
|
||||||
// Arguments are handled in the manner of fmt.Println.
|
|
||||||
func Println(v ...interface{}) { |
|
||||||
std.Output(2, fmt.Sprintln(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Fatal is equivalent to Print() followed by a call to os.Exit(1).
|
|
||||||
func Fatal(v ...interface{}) { |
|
||||||
std.SetPrefix("FATAL:") |
|
||||||
std.Output(2, fmt.Sprint(v...)) |
|
||||||
os.Exit(1) |
|
||||||
} |
|
||||||
|
|
||||||
// Fatalf is equivalent to Printf() followed by a call to os.Exit(1).
|
|
||||||
func Fatalf(format string, v ...interface{}) { |
|
||||||
std.SetPrefix("FATAL:") |
|
||||||
std.Output(2, fmt.Sprintf(format, v...)) |
|
||||||
os.Exit(1) |
|
||||||
} |
|
||||||
|
|
||||||
// Fatalln is equivalent to Println() followed by a call to os.Exit(1).
|
|
||||||
func Fatalln(v ...interface{}) { |
|
||||||
std.SetPrefix("FATAL:") |
|
||||||
std.Output(2, fmt.Sprintln(v...)) |
|
||||||
os.Exit(1) |
|
||||||
} |
|
||||||
|
|
||||||
// Errorf is equivalent to Printf() followed by a call to os.Exit(1).
|
|
||||||
func Errorf(format string, v ...interface{}) { |
|
||||||
std.SetPrefix("ERROR:") |
|
||||||
std.Output(2, fmt.Sprintf(format, v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Errorln is equivalent to Println() followed by a call to os.Exit(1).
|
|
||||||
func Errorln(v ...interface{}) { |
|
||||||
std.SetPrefix("ERROR:") |
|
||||||
std.Output(2, fmt.Sprintln(v...)) |
|
||||||
} |
|
||||||
|
|
||||||
// Panic is equivalent to Print() followed by a call to panic().
|
|
||||||
func Panic(v ...interface{}) { |
|
||||||
s := fmt.Sprint(v...) |
|
||||||
std.Output(2, s) |
|
||||||
panic(s) |
|
||||||
} |
|
||||||
|
|
||||||
// Panicf is equivalent to Printf() followed by a call to panic().
|
|
||||||
func Panicf(format string, v ...interface{}) { |
|
||||||
s := fmt.Sprintf(format, v...) |
|
||||||
std.Output(2, s) |
|
||||||
panic(s) |
|
||||||
} |
|
||||||
|
|
||||||
// Panicln is equivalent to Println() followed by a call to panic().
|
|
||||||
func Panicln(v ...interface{}) { |
|
||||||
s := fmt.Sprintln(v...) |
|
||||||
std.Output(2, s) |
|
||||||
panic(s) |
|
||||||
} |
|
||||||
Loading…
Reference in new issue