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@gyuho @shrajfr12 @heyitsanthony
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// Copyright 2016 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package clientv3
import (
"io/ioutil"
"sync"
"go.etcd.io/etcd/pkg/logutil"
"google.golang.org/grpc/grpclog"
)
var (
lgMu sync.RWMutex
lg logutil.Logger
)
type settableLogger struct {
l grpclog.LoggerV2
mu sync.RWMutex
}
func init() {
// disable client side logs by default
lg = &settableLogger{}
SetLogger(grpclog.NewLoggerV2(ioutil.Discard, ioutil.Discard, ioutil.Discard))
}
// SetLogger sets client-side Logger.
func SetLogger(l grpclog.LoggerV2) {
lgMu.Lock()
lg = logutil.NewLogger(l)
// override grpclog so that any changes happen with locking
grpclog.SetLoggerV2(lg)
lgMu.Unlock()
}
// GetLogger returns the current logutil.Logger.
func GetLogger() logutil.Logger {
lgMu.RLock()
l := lg
lgMu.RUnlock()
return l
}
// NewLogger returns a new Logger with logutil.Logger.
func NewLogger(gl grpclog.LoggerV2) logutil.Logger {
return &settableLogger{l: gl}
}
func (s *settableLogger) get() grpclog.LoggerV2 {
s.mu.RLock()
l := s.l
s.mu.RUnlock()
return l
}
// implement the grpclog.LoggerV2 interface
func (s *settableLogger) Info(args ...interface{}) { s.get().Info(args...) }
func (s *settableLogger) Infof(format string, args ...interface{}) { s.get().Infof(format, args...) }
func (s *settableLogger) Infoln(args ...interface{}) { s.get().Infoln(args...) }
func (s *settableLogger) Warning(args ...interface{}) { s.get().Warning(args...) }
func (s *settableLogger) Warningf(format string, args ...interface{}) {
s.get().Warningf(format, args...)
}
func (s *settableLogger) Warningln(args ...interface{}) { s.get().Warningln(args...) }
func (s *settableLogger) Error(args ...interface{}) { s.get().Error(args...) }
func (s *settableLogger) Errorf(format string, args ...interface{}) {
s.get().Errorf(format, args...)
}
func (s *settableLogger) Errorln(args ...interface{}) { s.get().Errorln(args...) }
func (s *settableLogger) Fatal(args ...interface{}) { s.get().Fatal(args...) }
func (s *settableLogger) Fatalf(format string, args ...interface{}) { s.get().Fatalf(format, args...) }
func (s *settableLogger) Fatalln(args ...interface{}) { s.get().Fatalln(args...) }
func (s *settableLogger) Print(args ...interface{}) { s.get().Info(args...) }
func (s *settableLogger) Printf(format string, args ...interface{}) { s.get().Infof(format, args...) }
func (s *settableLogger) Println(args ...interface{}) { s.get().Infoln(args...) }
func (s *settableLogger) V(l int) bool { return s.get().V(l) }
func (s *settableLogger) Lvl(lvl int) grpclog.LoggerV2 {
s.mu.RLock()
l := s.l
s.mu.RUnlock()
if l.V(lvl) {
return s
}
return logutil.NewDiscardLogger()
}
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