/
interface.go
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/
interface.go
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// Copyright 2018 The klaytn Authors
// This file is part of the klaytn library.
//
// The klaytn library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The klaytn library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the klaytn library. If not, see <http://www.gnu.org/licenses/>.
package log
import (
"fmt"
"io"
"os"
"runtime"
)
const module = "module"
const (
ZapLogger = "zap"
Log15Logger = "log15"
DefaultLogger = Log15Logger
)
var baseLogger Logger
type Logger interface {
NewWith(keysAndValues ...interface{}) Logger
newModuleLogger(mi ModuleID) Logger
Trace(msg string, keysAndValues ...interface{})
Debug(msg string, keysAndValues ...interface{})
Info(msg string, keysAndValues ...interface{})
Warn(msg string, keysAndValues ...interface{})
Error(msg string, keysAndValues ...interface{})
ErrorWithStack(msg string, keysAndValues ...interface{})
Crit(msg string, keysAndValues ...interface{})
CritWithStack(msg string, keysAndValues ...interface{})
// GetHandler gets the handler associated with the logger.
GetHandler() Handler
// SetHandler updates the logger to write records to the specified handler.
SetHandler(h Handler)
}
func init() {
root.SetHandler(DiscardHandler())
SetBaseLogger()
}
func SetBaseLogger() {
switch DefaultLogger {
case ZapLogger:
baseLogger = genBaseLoggerZap()
case Log15Logger:
baseLogger = root
default:
baseLogger = genBaseLoggerZap()
}
}
func NewModuleLogger(mi ModuleID) Logger {
newLogger := baseLogger.newModuleLogger(mi)
return newLogger
}
// Fatalf formats a message to standard error and exits the program.
// The message is also printed to standard output if standard error
// is redirected to a different file.
func Fatalf(format string, args ...interface{}) {
w := io.MultiWriter(os.Stdout, os.Stderr)
if runtime.GOOS == "windows" {
// The SameFile check below doesn't work on Windows.
// stdout is unlikely to get redirected though, so just print there.
w = os.Stdout
} else {
outf, _ := os.Stdout.Stat()
errf, _ := os.Stderr.Stat()
if outf != nil && errf != nil && os.SameFile(outf, errf) {
w = os.Stderr
}
}
fmt.Fprintf(w, "Fatal: "+format+"\n", args...)
os.Exit(1)
}