1 // Copyright (c) 2016 Uber Technologies, Inc.
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:
10 // The above copyright notice and this permission notice shall be included in
11 // all copies or substantial portions of the Software.
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
23 import "go.uber.org/multierr"
27 // NewTee creates a Core that duplicates log entries into two or more
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 {
39 return multiCore(cores)
43 func (mc multiCore) With(fields []Field) Core {
44 clone := make(multiCore, len(mc))
46 clone[i] = mc[i].With(fields)
51 func (mc multiCore) Enabled(lvl Level) bool {
53 if mc[i].Enabled(lvl) {
60 func (mc multiCore) Check(ent Entry, ce *CheckedEntry) *CheckedEntry {
62 ce = mc[i].Check(ent, ce)
67 func (mc multiCore) Write(ent Entry, fields []Field) error {
70 err = multierr.Append(err, mc[i].Write(ent, fields))
75 func (mc multiCore) Sync() error {
78 err = multierr.Append(err, mc[i].Sync())