go.temporal.io/server@v1.23.0/common/log/lazy_logger.go (about) 1 // The MIT License 2 // 3 // Copyright (c) 2020 Temporal Technologies Inc. All rights reserved. 4 // 5 // Copyright (c) 2020 Uber Technologies, Inc. 6 // 7 // Permission is hereby granted, free of charge, to any person obtaining a copy 8 // of this software and associated documentation files (the "Software"), to deal 9 // in the Software without restriction, including without limitation the rights 10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 // copies of the Software, and to permit persons to whom the Software is 12 // furnished to do so, subject to the following conditions: 13 // 14 // The above copyright notice and this permission notice shall be included in 15 // all copies or substantial portions of the Software. 16 // 17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 // THE SOFTWARE. 24 25 package log 26 27 import ( 28 "sync" 29 30 "go.temporal.io/server/common/log/tag" 31 ) 32 33 var _ Logger = (*lazyLogger)(nil) 34 35 type ( 36 lazyLogger struct { 37 logger Logger 38 tagFn func() []tag.Tag 39 40 once sync.Once 41 } 42 ) 43 44 func NewLazyLogger(logger Logger, tagFn func() []tag.Tag) *lazyLogger { 45 return &lazyLogger{ 46 logger: logger, 47 tagFn: tagFn, 48 } 49 } 50 51 func (l *lazyLogger) Debug(msg string, tags ...tag.Tag) { 52 l.once.Do(l.tagLogger) 53 l.logger.Debug(msg, tags...) 54 } 55 56 func (l *lazyLogger) Info(msg string, tags ...tag.Tag) { 57 l.once.Do(l.tagLogger) 58 l.logger.Info(msg, tags...) 59 } 60 61 func (l *lazyLogger) Warn(msg string, tags ...tag.Tag) { 62 l.once.Do(l.tagLogger) 63 l.logger.Warn(msg, tags...) 64 } 65 66 func (l *lazyLogger) Error(msg string, tags ...tag.Tag) { 67 l.once.Do(l.tagLogger) 68 l.logger.Error(msg, tags...) 69 } 70 71 func (l *lazyLogger) DPanic(msg string, tags ...tag.Tag) { 72 l.once.Do(l.tagLogger) 73 l.logger.DPanic(msg, tags...) 74 } 75 76 func (l *lazyLogger) Panic(msg string, tags ...tag.Tag) { 77 l.once.Do(l.tagLogger) 78 l.logger.Panic(msg, tags...) 79 } 80 81 func (l *lazyLogger) Fatal(msg string, tags ...tag.Tag) { 82 l.once.Do(l.tagLogger) 83 l.logger.Fatal(msg, tags...) 84 } 85 86 func (l *lazyLogger) tagLogger() { 87 l.logger = With(l.logger, l.tagFn()...) 88 }