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// Copyright (C) 2010, Kyle Lemons <kyle@kylelemons.net>. All rights reserved.
package log4go
import (
"errors"
"os"
"fmt"
"strings"
)
var (
Global Logger
)
func init() {
Global = NewDefaultLogger(DEBUG)
}
// Wrapper for (*Logger).LoadConfiguration
func LoadConfiguration(filename string) {
Global.LoadConfiguration(filename)
}
// Wrapper for (*Logger).AddFilter
func AddFilter(name string, lvl level, writer LogWriter) {
Global.AddFilter(name, lvl, writer)
}
// Wrapper for (*Logger).Close (closes and removes all logwriters)
func Close() {
Global.Close()
}
func Crash(args ...interface{}) {
if len(args) > 0 {
Global.intLogf(CRITICAL, strings.Repeat(" %v", len(args))[1:], args...)
}
panic(args)
}
// Logs the given message and crashes the program
func Crashf(format string, args ...interface{}) {
Global.intLogf(CRITICAL, format, args...)
Global.Close() // so that hopefully the messages get logged
panic(fmt.Sprintf(format, args...))
}
// Compatibility with `log`
func Exit(args ...interface{}) {
if len(args) > 0 {
Global.intLogf(ERROR, strings.Repeat(" %v", len(args))[1:], args...)
}
Global.Close() // so that hopefully the messages get logged
os.Exit(0)
}
// Compatibility with `log`
func Exitf(format string, args ...interface{}) {
Global.intLogf(ERROR, format, args...)
Global.Close() // so that hopefully the messages get logged
os.Exit(0)
}
// Compatibility with `log`
func Stderr(args ...interface{}) {
if len(args) > 0 {
Global.intLogf(ERROR, strings.Repeat(" %v", len(args))[1:], args...)
}
}
// Compatibility with `log`
func Stderrf(format string, args ...interface{}) {
Global.intLogf(ERROR, format, args...)
}
// Compatibility with `log`
func Stdout(args ...interface{}) {
if len(args) > 0 {
Global.intLogf(INFO, strings.Repeat(" %v", len(args))[1:], args...)
}
}
// Compatibility with `log`
func Stdoutf(format string, args ...interface{}) {
Global.intLogf(INFO, format, args...)
}
// Send a log message manually
// Wrapper for (*Logger).Log
func Log(lvl level, source, message string) {
Global.Log(lvl, source, message)
}
// Send a formatted log message easily
// Wrapper for (*Logger).Logf
func Logf(lvl level, format string, args ...interface{}) {
Global.intLogf(lvl, format, args...)
}
// Send a closure log message
// Wrapper for (*Logger).Logc
func Logc(lvl level, closure func() string) {
Global.intLogc(lvl, closure)
}
// Utility for finest log messages (see Debug() for parameter explanation)
// Wrapper for (*Logger).Finest
func Finest(arg0 interface{}, args ...interface{}) {
const (
lvl = FINEST
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
case func() string:
// Log the closure (no other arguments used)
Global.intLogc(lvl, first)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(arg0)+strings.Repeat(" %v", len(args)), args...)
}
}
// Utility for fine log messages (see Debug() for parameter explanation)
// Wrapper for (*Logger).Fine
func Fine(arg0 interface{}, args ...interface{}) {
const (
lvl = FINE
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
case func() string:
// Log the closure (no other arguments used)
Global.intLogc(lvl, first)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(arg0)+strings.Repeat(" %v", len(args)), args...)
}
}
// Utility for debug log messages
// When given a string as the first argument, this behaves like Logf but with the DEBUG log level (e.g. the first argument is interpreted as a format for the latter arguments)
// When given a closure of type func()string, this logs the string returned by the closure iff it will be logged. The closure runs at most one time.
// When given anything else, the log message will be each of the arguments formatted with %v and separated by spaces (ala Sprint).
// Wrapper for (*Logger).Debug
func Debug(arg0 interface{}, args ...interface{}) {
const (
lvl = DEBUG
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
case func() string:
// Log the closure (no other arguments used)
Global.intLogc(lvl, first)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(arg0)+strings.Repeat(" %v", len(args)), args...)
}
}
// Utility for trace log messages (see Debug() for parameter explanation)
// Wrapper for (*Logger).Trace
func Trace(arg0 interface{}, args ...interface{}) {
const (
lvl = TRACE
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
case func() string:
// Log the closure (no other arguments used)
Global.intLogc(lvl, first)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(arg0)+strings.Repeat(" %v", len(args)), args...)
}
}
// Utility for info log messages (see Debug() for parameter explanation)
// Wrapper for (*Logger).Info
func Info(arg0 interface{}, args ...interface{}) {
const (
lvl = INFO
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
case func() string:
// Log the closure (no other arguments used)
Global.intLogc(lvl, first)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(arg0)+strings.Repeat(" %v", len(args)), args...)
}
}
// Utility for warn log messages (returns an error for easy function returns) (see Debug() for parameter explanation)
// These functions will execute a closure exactly once, to build the error message for the return
// Wrapper for (*Logger).Warn
func Warn(arg0 interface{}, args ...interface{}) error {
const (
lvl = WARNING
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
return errors.New(fmt.Sprintf(first, args...))
case func() string:
// Log the closure (no other arguments used)
str := first()
Global.intLogf(lvl, "%s", str)
return errors.New(str)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(first)+strings.Repeat(" %v", len(args)), args...)
return errors.New(fmt.Sprint(first) + fmt.Sprintf(strings.Repeat(" %v", len(args)), args...))
}
return nil
}
// Utility for error log messages (returns an error for easy function returns) (see Debug() for parameter explanation)
// These functions will execute a closure exactly once, to build the error message for the return
// Wrapper for (*Logger).Error
func Error(arg0 interface{}, args ...interface{}) error {
const (
lvl = ERROR
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
return errors.New(fmt.Sprintf(first, args...))
case func() string:
// Log the closure (no other arguments used)
str := first()
Global.intLogf(lvl, "%s", str)
return errors.New(str)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(first)+strings.Repeat(" %v", len(args)), args...)
return errors.New(fmt.Sprint(first) + fmt.Sprintf(strings.Repeat(" %v", len(args)), args...))
}
return nil
}
// Utility for critical log messages (returns an error for easy function returns) (see Debug() for parameter explanation)
// These functions will execute a closure exactly once, to build the error message for the return
// Wrapper for (*Logger).Critical
func Critical(arg0 interface{}, args ...interface{}) error {
const (
lvl = CRITICAL
)
switch first := arg0.(type) {
case string:
// Use the string as a format string
Global.intLogf(lvl, first, args...)
return errors.New(fmt.Sprintf(first, args...))
case func() string:
// Log the closure (no other arguments used)
str := first()
Global.intLogf(lvl, "%s", str)
return errors.New(str)
default:
// Build a format string so that it will be similar to Sprint
Global.intLogf(lvl, fmt.Sprint(first)+strings.Repeat(" %v", len(args)), args...)
return errors.New(fmt.Sprint(first) + fmt.Sprintf(strings.Repeat(" %v", len(args)), args...))
}
return nil
}
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