khenaidoo | ac63710 | 2019-01-14 15:44:34 -0500 | [diff] [blame] | 1 | // Copyright (c) 2016 Uber Technologies, Inc. |
| 2 | // |
| 3 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 | // of this software and associated documentation files (the "Software"), to deal |
| 5 | // in the Software without restriction, including without limitation the rights |
| 6 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 | // copies of the Software, and to permit persons to whom the Software is |
| 8 | // furnished to do so, subject to the following conditions: |
| 9 | // |
| 10 | // The above copyright notice and this permission notice shall be included in |
| 11 | // all copies or substantial portions of the Software. |
| 12 | // |
| 13 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 | // THE SOFTWARE. |
| 20 | |
| 21 | package zapcore |
| 22 | |
| 23 | import "go.uber.org/multierr" |
| 24 | |
| 25 | type multiCore []Core |
| 26 | |
| 27 | // NewTee creates a Core that duplicates log entries into two or more |
| 28 | // underlying Cores. |
| 29 | // |
| 30 | // Calling it with a single Core returns the input unchanged, and calling |
| 31 | // it with no input returns a no-op Core. |
| 32 | func NewTee(cores ...Core) Core { |
| 33 | switch len(cores) { |
| 34 | case 0: |
| 35 | return NewNopCore() |
| 36 | case 1: |
| 37 | return cores[0] |
| 38 | default: |
| 39 | return multiCore(cores) |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | func (mc multiCore) With(fields []Field) Core { |
| 44 | clone := make(multiCore, len(mc)) |
| 45 | for i := range mc { |
| 46 | clone[i] = mc[i].With(fields) |
| 47 | } |
| 48 | return clone |
| 49 | } |
| 50 | |
| 51 | func (mc multiCore) Enabled(lvl Level) bool { |
| 52 | for i := range mc { |
| 53 | if mc[i].Enabled(lvl) { |
| 54 | return true |
| 55 | } |
| 56 | } |
| 57 | return false |
| 58 | } |
| 59 | |
| 60 | func (mc multiCore) Check(ent Entry, ce *CheckedEntry) *CheckedEntry { |
| 61 | for i := range mc { |
| 62 | ce = mc[i].Check(ent, ce) |
| 63 | } |
| 64 | return ce |
| 65 | } |
| 66 | |
| 67 | func (mc multiCore) Write(ent Entry, fields []Field) error { |
| 68 | var err error |
| 69 | for i := range mc { |
| 70 | err = multierr.Append(err, mc[i].Write(ent, fields)) |
| 71 | } |
| 72 | return err |
| 73 | } |
| 74 | |
| 75 | func (mc multiCore) Sync() error { |
| 76 | var err error |
| 77 | for i := range mc { |
| 78 | err = multierr.Append(err, mc[i].Sync()) |
| 79 | } |
| 80 | return err |
| 81 | } |