go.etcd.io/etcd@v3.3.27+incompatible/pkg/logutil/discard_logger.go (about) 1 // Copyright 2018 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package logutil 16 17 import ( 18 "log" 19 20 "google.golang.org/grpc/grpclog" 21 ) 22 23 // assert that "discardLogger" satisfy "Logger" interface 24 var _ Logger = &discardLogger{} 25 26 // NewDiscardLogger returns a new Logger that discards everything except "fatal". 27 func NewDiscardLogger() Logger { return &discardLogger{} } 28 29 type discardLogger struct{} 30 31 func (l *discardLogger) Info(args ...interface{}) {} 32 func (l *discardLogger) Infoln(args ...interface{}) {} 33 func (l *discardLogger) Infof(format string, args ...interface{}) {} 34 func (l *discardLogger) Warning(args ...interface{}) {} 35 func (l *discardLogger) Warningln(args ...interface{}) {} 36 func (l *discardLogger) Warningf(format string, args ...interface{}) {} 37 func (l *discardLogger) Error(args ...interface{}) {} 38 func (l *discardLogger) Errorln(args ...interface{}) {} 39 func (l *discardLogger) Errorf(format string, args ...interface{}) {} 40 func (l *discardLogger) Fatal(args ...interface{}) { log.Fatal(args...) } 41 func (l *discardLogger) Fatalln(args ...interface{}) { log.Fatalln(args...) } 42 func (l *discardLogger) Fatalf(format string, args ...interface{}) { log.Fatalf(format, args...) } 43 func (l *discardLogger) V(lvl int) bool { 44 return false 45 } 46 func (l *discardLogger) Lvl(lvl int) grpclog.LoggerV2 { return l }