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128 lines
3.2 KiB
Go
128 lines
3.2 KiB
Go
/*
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Package logger implements a multi-output leveled logger.
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Other packages use tagged logger to send log messages to shared
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(process-wide) logging engine. The shared logging engine dispatches to
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multiple log systems. The log level can be set separately per log
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system.
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Logging is asynchronous and does not block the caller. Message
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formatting is performed by the caller goroutine to avoid incorrect
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logging of mutable state.
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*/
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package logger
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import (
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"fmt"
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"os"
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)
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// LogSystem is implemented by log output devices.
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// All methods can be called concurrently from multiple goroutines.
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type LogSystem interface {
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GetLogLevel() LogLevel
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SetLogLevel(i LogLevel)
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LogPrint(LogLevel, string)
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}
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type message struct {
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level LogLevel
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msg string
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}
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type LogLevel uint32
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const (
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// Standard log levels
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Silence LogLevel = iota
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ErrorLevel
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WarnLevel
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InfoLevel
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DebugLevel
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DebugDetailLevel
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JsonLevel = 1000
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)
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// A Logger prints messages prefixed by a given tag. It provides named
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// Printf and Println style methods for all loglevels. Each ethereum
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// component should have its own logger with a unique prefix.
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type Logger struct {
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tag string
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}
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func NewLogger(tag string) *Logger {
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return &Logger{"[" + tag + "] "}
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}
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func (logger *Logger) sendln(level LogLevel, v ...interface{}) {
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logMessageC <- message{level, logger.tag + fmt.Sprintln(v...)}
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}
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func (logger *Logger) sendf(level LogLevel, format string, v ...interface{}) {
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logMessageC <- message{level, logger.tag + fmt.Sprintf(format, v...)}
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}
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// Errorln writes a message with ErrorLevel.
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func (logger *Logger) Errorln(v ...interface{}) {
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logger.sendln(ErrorLevel, v...)
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}
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// Warnln writes a message with WarnLevel.
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func (logger *Logger) Warnln(v ...interface{}) {
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logger.sendln(WarnLevel, v...)
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}
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// Infoln writes a message with InfoLevel.
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func (logger *Logger) Infoln(v ...interface{}) {
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logger.sendln(InfoLevel, v...)
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}
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// Debugln writes a message with DebugLevel.
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func (logger *Logger) Debugln(v ...interface{}) {
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logger.sendln(DebugLevel, v...)
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}
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// DebugDetailln writes a message with DebugDetailLevel.
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func (logger *Logger) DebugDetailln(v ...interface{}) {
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logger.sendln(DebugDetailLevel, v...)
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}
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// Errorf writes a message with ErrorLevel.
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func (logger *Logger) Errorf(format string, v ...interface{}) {
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logger.sendf(ErrorLevel, format, v...)
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}
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// Warnf writes a message with WarnLevel.
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func (logger *Logger) Warnf(format string, v ...interface{}) {
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logger.sendf(WarnLevel, format, v...)
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}
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// Infof writes a message with InfoLevel.
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func (logger *Logger) Infof(format string, v ...interface{}) {
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logger.sendf(InfoLevel, format, v...)
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}
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// Debugf writes a message with DebugLevel.
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func (logger *Logger) Debugf(format string, v ...interface{}) {
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logger.sendf(DebugLevel, format, v...)
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}
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// DebugDetailf writes a message with DebugDetailLevel.
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func (logger *Logger) DebugDetailf(format string, v ...interface{}) {
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logger.sendf(DebugDetailLevel, format, v...)
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}
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// Fatalln writes a message with ErrorLevel and exits the program.
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func (logger *Logger) Fatalln(v ...interface{}) {
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logger.sendln(ErrorLevel, v...)
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Flush()
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os.Exit(0)
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}
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// Fatalf writes a message with ErrorLevel and exits the program.
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func (logger *Logger) Fatalf(format string, v ...interface{}) {
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logger.sendf(ErrorLevel, format, v...)
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Flush()
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os.Exit(0)
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}
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