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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package logger
import "os"
func ExampleLogger() {
logger := NewLogger("TAG")
logger.Infoln("so awesome") // prints [TAG] so awesome
logger.Infof("this %q is raw", "coin") // prints [TAG] this "coin" is raw
}
func ExampleLogSystem() {
filename := "test.log"
file, _ := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
fileLog := NewStdLogSystem(file, 0, WarnLevel)
AddLogSystem(fileLog)
stdoutLog := NewStdLogSystem(os.Stdout, 0, WarnLevel)
AddLogSystem(stdoutLog)
NewLogger("TAG").Warnln("reactor meltdown") // writes to both logs
}
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