/
loggercopy.go
76 lines (65 loc) · 1.78 KB
/
loggercopy.go
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/*
* === This file is part of ALICE O² ===
*
* Copyright 2022 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
package logger
import (
"bytes"
"sync"
"github.com/sirupsen/logrus"
)
// This file implements a workaround for https://github.com/sirupsen/logrus/issues/564
type SafeLogrusWriter struct {
Entry *logrus.Entry
PrintFunc func(...interface{})
buf bytes.Buffer
mu sync.Mutex
}
func (w *SafeLogrusWriter) Write(b []byte) (int, error) {
w.mu.Lock()
defer w.mu.Unlock()
origLen := len(b)
for {
if len(b) == 0 {
return origLen, nil
}
i := bytes.IndexByte(b, '\n')
if i < 0 {
w.buf.Write(b)
return origLen, nil
}
w.buf.Write(b[:i])
w.alwaysFlush()
b = b[i+1:]
}
}
func (w *SafeLogrusWriter) alwaysFlush() {
w.PrintFunc(w.buf.String())
w.buf.Reset()
}
func (w *SafeLogrusWriter) Flush() {
w.mu.Lock()
defer w.mu.Unlock()
if w.buf.Len() != 0 {
w.alwaysFlush()
}
}