| // Copyright (c) 2016 Uber Technologies, Inc. |
| // |
| // Permission is hereby granted, free of charge, to any person obtaining a copy |
| // of this software and associated documentation files (the "Software"), to deal |
| // in the Software without restriction, including without limitation the rights |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| // copies of the Software, and to permit persons to whom the Software is |
| // furnished to do so, subject to the following conditions: |
| // |
| // The above copyright notice and this permission notice shall be included in |
| // all copies or substantial portions of the Software. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| // THE SOFTWARE. |
| |
| package zapcore |
| |
| import "go.uber.org/multierr" |
| |
| type multiCore []Core |
| |
| // NewTee creates a Core that duplicates log entries into two or more |
| // underlying Cores. |
| // |
| // Calling it with a single Core returns the input unchanged, and calling |
| // it with no input returns a no-op Core. |
| func NewTee(cores ...Core) Core { |
| switch len(cores) { |
| case 0: |
| return NewNopCore() |
| case 1: |
| return cores[0] |
| default: |
| return multiCore(cores) |
| } |
| } |
| |
| func (mc multiCore) With(fields []Field) Core { |
| clone := make(multiCore, len(mc)) |
| for i := range mc { |
| clone[i] = mc[i].With(fields) |
| } |
| return clone |
| } |
| |
| func (mc multiCore) Enabled(lvl Level) bool { |
| for i := range mc { |
| if mc[i].Enabled(lvl) { |
| return true |
| } |
| } |
| return false |
| } |
| |
| func (mc multiCore) Check(ent Entry, ce *CheckedEntry) *CheckedEntry { |
| for i := range mc { |
| ce = mc[i].Check(ent, ce) |
| } |
| return ce |
| } |
| |
| func (mc multiCore) Write(ent Entry, fields []Field) error { |
| var err error |
| for i := range mc { |
| err = multierr.Append(err, mc[i].Write(ent, fields)) |
| } |
| return err |
| } |
| |
| func (mc multiCore) Sync() error { |
| var err error |
| for i := range mc { |
| err = multierr.Append(err, mc[i].Sync()) |
| } |
| return err |
| } |