Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
7 changed files
with
178 additions
and
35 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| // Copyright 2015 The Govisor Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use file except in compliance with the License. | ||
| // You may obtain a copy of the license at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package govisor | ||
|
|
||
| import ( | ||
| "log" | ||
| "strings" | ||
| "sync" | ||
| ) | ||
|
|
||
| // MultiLogger implements a wrapper around log.Logger, that permits a single | ||
| // logger interface to be used to fan out multiple logs. The idea is that it | ||
| // implements an io.Writer, which breaks up the lines and delivers them | ||
| // each to the various contained loggers. The contained loggers may have | ||
| // their own Prefix and Flags, and those shall not interfere with the parent. | ||
| type MultiLogger struct { | ||
| log *log.Logger | ||
| loggers []*log.Logger | ||
| lock sync.Mutex | ||
| } | ||
|
|
||
| // Write implements the io.Writer, suitable for use with Logger. It is | ||
| // expected that the input is text, delimited by newlines, and delivered | ||
| // an entire line at a time. This isn't exactly io.Writer, but it is the | ||
| // semantic to which the log.Logger interface conforms. | ||
| func (l *MultiLogger) Write(b []byte) (int, error) { | ||
| lines := strings.Split(strings.Trim(string(b), "\n"), "\n") | ||
| l.lock.Lock() | ||
| for _, line := range lines { | ||
| for _, logger := range l.loggers { | ||
| logger.Println(line) | ||
| } | ||
| } | ||
| l.lock.Unlock() | ||
| return len(b), nil | ||
| } | ||
|
|
||
| // AddLogger adds a logger to the MultiLogger. Once called, all new log entries | ||
| // will be fanned out to this logger, as well as any others that may have been | ||
| // registered earlier. A logger can only be added once. | ||
| func (l *MultiLogger) AddLogger(logger *log.Logger) { | ||
| l.lock.Lock() | ||
| defer l.lock.Unlock() | ||
| for _, x := range l.loggers { | ||
| if x == logger { | ||
| return | ||
| } | ||
| } | ||
| l.loggers = append(l.loggers, logger) | ||
| } | ||
|
|
||
| // DeleteLogger is removes a logger from the list of destinations that logged | ||
| // events are fanned out to. | ||
| func (l *MultiLogger) DelLogger(logger *log.Logger) { | ||
| l.lock.Lock() | ||
| defer l.lock.Unlock() | ||
|
|
||
| for i, x := range l.loggers { | ||
| if x == logger { | ||
| l.loggers = append(l.loggers[:i], l.loggers[i+1:]...) | ||
| break | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // SetPrefix applies the prefix to every registered logger. | ||
| func (l *MultiLogger) SetPrefix(prefix string) { | ||
| l.lock.Lock() | ||
| for _, x := range l.loggers { | ||
| x.SetPrefix(prefix) | ||
| } | ||
| l.lock.Unlock() | ||
| } | ||
|
|
||
| // SetFlags applies the flags to every registered logger. | ||
| func (l *MultiLogger) SetFlags(flags int) { | ||
| l.lock.Lock() | ||
| for _, x := range l.loggers { | ||
| x.SetFlags(flags) | ||
| } | ||
| l.lock.Unlock() | ||
| } | ||
|
|
||
| func (l *MultiLogger) Logger() *log.Logger { | ||
| return l.log | ||
| } | ||
|
|
||
| func NewMultiLogger() *MultiLogger { | ||
| m := &MultiLogger{} | ||
| m.log = log.New(m, "", 0) | ||
| return m | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters