forked from canonical/lxd
/
log.go
97 lines (80 loc) · 1.91 KB
/
log.go
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package shared
import (
"fmt"
"runtime"
)
type Logger interface {
Debug(msg string, ctx ...interface{})
Info(msg string, ctx ...interface{})
Warn(msg string, ctx ...interface{})
Error(msg string, ctx ...interface{})
Crit(msg string, ctx ...interface{})
}
var Log Logger
type nullLogger struct{}
func (nl nullLogger) Debug(msg string, ctx ...interface{}) {}
func (nl nullLogger) Info(msg string, ctx ...interface{}) {}
func (nl nullLogger) Warn(msg string, ctx ...interface{}) {}
func (nl nullLogger) Error(msg string, ctx ...interface{}) {}
func (nl nullLogger) Crit(msg string, ctx ...interface{}) {}
func init() {
Log = nullLogger{}
}
// General wrappers around Logger interface functions.
func LogDebug(msg string, ctx interface{}) {
if Log != nil {
Log.Debug(msg, ctx)
}
}
func LogInfo(msg string, ctx interface{}) {
if Log != nil {
Log.Info(msg, ctx)
}
}
func LogWarn(msg string, ctx interface{}) {
if Log != nil {
Log.Warn(msg, ctx)
}
}
func LogError(msg string, ctx interface{}) {
if Log != nil {
Log.Error(msg, ctx)
}
}
func LogCrit(msg string, ctx interface{}) {
if Log != nil {
Log.Crit(msg, ctx)
}
}
// Wrappers around Logger interface functions that send a string to the Logger
// by running it through fmt.Sprintf().
func LogInfof(format string, args ...interface{}) {
if Log != nil {
Log.Info(fmt.Sprintf(format, args...))
}
}
func LogDebugf(format string, args ...interface{}) {
if Log != nil {
Log.Debug(fmt.Sprintf(format, args...))
}
}
func LogWarnf(format string, args ...interface{}) {
if Log != nil {
Log.Warn(fmt.Sprintf(format, args...))
}
}
func LogErrorf(format string, args ...interface{}) {
if Log != nil {
Log.Error(fmt.Sprintf(format, args...))
}
}
func LogCritf(format string, args ...interface{}) {
if Log != nil {
Log.Crit(fmt.Sprintf(format, args...))
}
}
func PrintStack() {
buf := make([]byte, 1<<16)
runtime.Stack(buf, true)
LogDebugf("%s", buf)
}