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package api
import (
"io"
"log"
"os"
)
// logger interface.
type Logger interface {
Tracef(format string, args ...interface{})
Debugf(format string, args ...interface{})
Infof(format string, args ...interface{})
Errorf(format string, args ...interface{})
}
var _ Logger = &StdLogger{}
// simple logger
// change better logger as you like.
type StdLogger struct {
*log.Logger
LogLevel int
}
func NewStdLogger(out io.Writer, prefix string, flag int, level int) *StdLogger {
if out == nil {
out = os.Stderr
}
if prefix == "" {
prefix = "dpf-client"
}
return &StdLogger{
Logger: log.New(out, prefix, flag),
LogLevel: level,
}
}
func (s *StdLogger) Tracef(format string, args ...interface{}) {
if s.LogLevel <= 0 {
s.Printf(format, args...)
}
}
func (s *StdLogger) Debugf(format string, args ...interface{}) {
if s.LogLevel <= 1 {
s.Printf(format, args...)
}
}
func (s *StdLogger) Infof(format string, args ...interface{}) {
if s.LogLevel <= 2 {
s.Printf(format, args...)
}
}
func (s *StdLogger) Errorf(format string, args ...interface{}) {
if s.LogLevel <= 4 {
s.Printf(format, args...)
}
}
|
