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// Copyright 2015 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package log
import (
"fmt"
"io"
"log"
)
// LogLevel defines a log level
type LogLevel int
// enumerate all LogLevels
const (
// !nashtsai! following level also match syslog.Priority value
LOG_DEBUG LogLevel = iota
LOG_INFO
LOG_WARNING
LOG_ERR
LOG_OFF
LOG_UNKNOWN
)
// default log options
const (
DEFAULT_LOG_PREFIX = "[xorm]"
DEFAULT_LOG_FLAG = log.Ldate | log.Lmicroseconds
DEFAULT_LOG_LEVEL = LOG_DEBUG
)
// Logger is a logger interface
type Logger interface {
Debug(v ...interface{})
Debugf(format string, v ...interface{})
Error(v ...interface{})
Errorf(format string, v ...interface{})
Info(v ...interface{})
Infof(format string, v ...interface{})
Warn(v ...interface{})
Warnf(format string, v ...interface{})
Level() LogLevel
SetLevel(l LogLevel)
ShowSQL(show ...bool)
IsShowSQL() bool
}
var _ Logger = DiscardLogger{}
// DiscardLogger don't log implementation for ILogger
type DiscardLogger struct{}
// Debug empty implementation
func (DiscardLogger) Debug(v ...interface{}) {}
// Debugf empty implementation
func (DiscardLogger) Debugf(format string, v ...interface{}) {}
// Error empty implementation
func (DiscardLogger) Error(v ...interface{}) {}
// Errorf empty implementation
func (DiscardLogger) Errorf(format string, v ...interface{}) {}
// Info empty implementation
func (DiscardLogger) Info(v ...interface{}) {}
// Infof empty implementation
func (DiscardLogger) Infof(format string, v ...interface{}) {}
// Warn empty implementation
func (DiscardLogger) Warn(v ...interface{}) {}
// Warnf empty implementation
func (DiscardLogger) Warnf(format string, v ...interface{}) {}
// Level empty implementation
func (DiscardLogger) Level() LogLevel {
return LOG_UNKNOWN
}
// SetLevel empty implementation
func (DiscardLogger) SetLevel(l LogLevel) {}
// ShowSQL empty implementation
func (DiscardLogger) ShowSQL(show ...bool) {}
// IsShowSQL empty implementation
func (DiscardLogger) IsShowSQL() bool {
return false
}
// SimpleLogger is the default implment of ILogger
type SimpleLogger struct {
DEBUG *log.Logger
ERR *log.Logger
INFO *log.Logger
WARN *log.Logger
level LogLevel
showSQL bool
}
var _ Logger = &SimpleLogger{}
// NewSimpleLogger use a special io.Writer as logger output
func NewSimpleLogger(out io.Writer) *SimpleLogger {
return NewSimpleLogger2(out, DEFAULT_LOG_PREFIX, DEFAULT_LOG_FLAG)
}
// NewSimpleLogger2 let you customrize your logger prefix and flag
func NewSimpleLogger2(out io.Writer, prefix string, flag int) *SimpleLogger {
return NewSimpleLogger3(out, prefix, flag, DEFAULT_LOG_LEVEL)
}
// NewSimpleLogger3 let you customrize your logger prefix and flag and logLevel
func NewSimpleLogger3(out io.Writer, prefix string, flag int, l LogLevel) *SimpleLogger {
return &SimpleLogger{
DEBUG: log.New(out, fmt.Sprintf("%s [debug] ", prefix), flag),
ERR: log.New(out, fmt.Sprintf("%s [error] ", prefix), flag),
INFO: log.New(out, fmt.Sprintf("%s [info] ", prefix), flag),
WARN: log.New(out, fmt.Sprintf("%s [warn] ", prefix), flag),
level: l,
}
}
// Error implement ILogger
func (s *SimpleLogger) Error(v ...interface{}) {
if s.level <= LOG_ERR {
s.ERR.Output(2, fmt.Sprintln(v...))
}
}
// Errorf implement ILogger
func (s *SimpleLogger) Errorf(format string, v ...interface{}) {
if s.level <= LOG_ERR {
s.ERR.Output(2, fmt.Sprintf(format, v...))
}
}
// Debug implement ILogger
func (s *SimpleLogger) Debug(v ...interface{}) {
if s.level <= LOG_DEBUG {
s.DEBUG.Output(2, fmt.Sprintln(v...))
}
}
// Debugf implement ILogger
func (s *SimpleLogger) Debugf(format string, v ...interface{}) {
if s.level <= LOG_DEBUG {
s.DEBUG.Output(2, fmt.Sprintf(format, v...))
}
}
// Info implement ILogger
func (s *SimpleLogger) Info(v ...interface{}) {
if s.level <= LOG_INFO {
s.INFO.Output(2, fmt.Sprintln(v...))
}
}
// Infof implement ILogger
func (s *SimpleLogger) Infof(format string, v ...interface{}) {
if s.level <= LOG_INFO {
s.INFO.Output(2, fmt.Sprintf(format, v...))
}
}
// Warn implement ILogger
func (s *SimpleLogger) Warn(v ...interface{}) {
if s.level <= LOG_WARNING {
s.WARN.Output(2, fmt.Sprintln(v...))
}
}
// Warnf implement ILogger
func (s *SimpleLogger) Warnf(format string, v ...interface{}) {
if s.level <= LOG_WARNING {
s.WARN.Output(2, fmt.Sprintf(format, v...))
}
}
// Level implement ILogger
func (s *SimpleLogger) Level() LogLevel {
return s.level
}
// SetLevel implement ILogger
func (s *SimpleLogger) SetLevel(l LogLevel) {
s.level = l
}
// ShowSQL implement ILogger
func (s *SimpleLogger) ShowSQL(show ...bool) {
if len(show) == 0 {
s.showSQL = true
return
}
s.showSQL = show[0]
}
// IsShowSQL implement ILogger
func (s *SimpleLogger) IsShowSQL() bool {
return s.showSQL
}
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