38 lines
1.3 KiB
Go
38 lines
1.3 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package logger
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import "os"
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func ExampleLogger() {
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logger := NewLogger("TAG")
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logger.Infoln("so awesome") // prints [TAG] so awesome
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logger.Infof("this %q is raw", "coin") // prints [TAG] this "coin" is raw
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}
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func ExampleLogSystem() {
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filename := "test.log"
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file, _ := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
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fileLog := NewStdLogSystem(file, 0, WarnLevel)
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AddLogSystem(fileLog)
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stdoutLog := NewStdLogSystem(os.Stdout, 0, WarnLevel)
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AddLogSystem(stdoutLog)
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NewLogger("TAG").Warnln("reactor meltdown") // writes to both logs
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}
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