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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 package logging | 5 package logging |
| 6 | 6 |
| 7 import ( | 7 import ( |
| 8 "bytes" | 8 "bytes" |
| 9 "fmt" | 9 "fmt" |
| 10 "sort" | 10 "sort" |
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| 169 func (s fieldEntrySlice) Swap(i, j int) { | 169 func (s fieldEntrySlice) Swap(i, j int) { |
| 170 s[i], s[j] = s[j], s[i] | 170 s[i], s[j] = s[j], s[i] |
| 171 } | 171 } |
| 172 | 172 |
| 173 func (s fieldEntrySlice) Len() int { | 173 func (s fieldEntrySlice) Len() int { |
| 174 return len(s) | 174 return len(s) |
| 175 } | 175 } |
| 176 | 176 |
| 177 // SetFields adds the additional fields as context for the current Logger. The | 177 // SetFields adds the additional fields as context for the current Logger. The |
| 178 // display of these fields depends on the implementation of the Logger. The | 178 // display of these fields depends on the implementation of the Logger. The |
| 179 // new Logger will contain the combination of its current Fields, updated with | 179 // new context will contain the combination of its current Fields, updated with |
| 180 // the new ones (see Fields.Copy). Specifying the new fields as nil will | 180 // the new ones (see Fields.Copy). Specifying the new fields as nil will |
| 181 // clear the currently set fields. | 181 // clear the currently set fields. |
| 182 func SetFields(c context.Context, fields Fields) context.Context { | 182 func SetFields(c context.Context, fields Fields) context.Context { |
| 183 return context.WithValue(c, fieldsKey, GetFields(c).Copy(fields)) | 183 return context.WithValue(c, fieldsKey, GetFields(c).Copy(fields)) |
| 184 } | 184 } |
| 185 | 185 |
| 186 // SetField is a convenience method for SetFields for a single key/value | 186 // SetField is a convenience method for SetFields for a single key/value |
| 187 // pair. | 187 // pair. |
| 188 func SetField(c context.Context, key string, value interface{}) context.Context
{ | 188 func SetField(c context.Context, key string, value interface{}) context.Context
{ |
| 189 return SetFields(c, Fields{key: value}) | 189 return SetFields(c, Fields{key: value}) |
| 190 } | 190 } |
| 191 | 191 |
| 192 // GetFields returns the current Fields. | 192 // GetFields returns the current Fields. |
| 193 // | 193 // |
| 194 // This method is used for logger implementations with the understanding that | 194 // This method is used for logger implementations with the understanding that |
| 195 // the returned fields must not be mutated. | 195 // the returned fields must not be mutated. |
| 196 func GetFields(c context.Context) Fields { | 196 func GetFields(c context.Context) Fields { |
| 197 if ret, ok := c.Value(fieldsKey).(Fields); ok { | 197 if ret, ok := c.Value(fieldsKey).(Fields); ok { |
| 198 return ret | 198 return ret |
| 199 } | 199 } |
| 200 return nil | 200 return nil |
| 201 } | 201 } |
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