mirror of https://github.com/tidwall/tile38.git
153 lines
3.5 KiB
Go
153 lines
3.5 KiB
Go
// Copyright 2012-2018 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//Package logger provides logging facilities for the NATS server
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package logger
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import (
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"fmt"
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"log"
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"os"
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)
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// Logger is the server logger
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type Logger struct {
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logger *log.Logger
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debug bool
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trace bool
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infoLabel string
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errorLabel string
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fatalLabel string
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debugLabel string
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traceLabel string
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logFile *os.File // file pointer for the file logger.
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}
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// NewStdLogger creates a logger with output directed to Stderr
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func NewStdLogger(time, debug, trace, colors, pid bool) *Logger {
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flags := 0
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if time {
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flags = log.LstdFlags | log.Lmicroseconds
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}
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pre := ""
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if pid {
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pre = pidPrefix()
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}
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l := &Logger{
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logger: log.New(os.Stderr, pre, flags),
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debug: debug,
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trace: trace,
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}
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if colors {
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setColoredLabelFormats(l)
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} else {
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setPlainLabelFormats(l)
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}
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return l
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}
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// NewFileLogger creates a logger with output directed to a file
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func NewFileLogger(filename string, time, debug, trace, pid bool) *Logger {
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fileflags := os.O_WRONLY | os.O_APPEND | os.O_CREATE
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f, err := os.OpenFile(filename, fileflags, 0660)
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if err != nil {
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log.Fatalf("error opening file: %v", err)
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}
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flags := 0
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if time {
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flags = log.LstdFlags | log.Lmicroseconds
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}
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pre := ""
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if pid {
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pre = pidPrefix()
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}
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l := &Logger{
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logger: log.New(f, pre, flags),
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debug: debug,
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trace: trace,
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logFile: f,
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}
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setPlainLabelFormats(l)
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return l
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}
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// Close implements the io.Closer interface to clean up
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// resources in the server's logger implementation.
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// Caller must ensure threadsafety.
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func (l *Logger) Close() error {
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if f := l.logFile; f != nil {
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l.logFile = nil
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return f.Close()
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}
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return nil
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}
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// Generate the pid prefix string
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func pidPrefix() string {
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return fmt.Sprintf("[%d] ", os.Getpid())
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}
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func setPlainLabelFormats(l *Logger) {
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l.infoLabel = "[INF] "
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l.debugLabel = "[DBG] "
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l.errorLabel = "[ERR] "
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l.fatalLabel = "[FTL] "
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l.traceLabel = "[TRC] "
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}
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func setColoredLabelFormats(l *Logger) {
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colorFormat := "[\x1b[%dm%s\x1b[0m] "
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l.infoLabel = fmt.Sprintf(colorFormat, 32, "INF")
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l.debugLabel = fmt.Sprintf(colorFormat, 36, "DBG")
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l.errorLabel = fmt.Sprintf(colorFormat, 31, "ERR")
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l.fatalLabel = fmt.Sprintf(colorFormat, 31, "FTL")
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l.traceLabel = fmt.Sprintf(colorFormat, 33, "TRC")
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}
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// Noticef logs a notice statement
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func (l *Logger) Noticef(format string, v ...interface{}) {
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l.logger.Printf(l.infoLabel+format, v...)
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}
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// Errorf logs an error statement
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func (l *Logger) Errorf(format string, v ...interface{}) {
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l.logger.Printf(l.errorLabel+format, v...)
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}
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// Fatalf logs a fatal error
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func (l *Logger) Fatalf(format string, v ...interface{}) {
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l.logger.Fatalf(l.fatalLabel+format, v...)
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}
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// Debugf logs a debug statement
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func (l *Logger) Debugf(format string, v ...interface{}) {
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if l.debug {
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l.logger.Printf(l.debugLabel+format, v...)
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}
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}
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// Tracef logs a trace statement
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func (l *Logger) Tracef(format string, v ...interface{}) {
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if l.trace {
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l.logger.Printf(l.traceLabel+format, v...)
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}
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}
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