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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| // Copyright 2022 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this 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 cmd | ||
|
|
||
| import ( | ||
| "os" | ||
| "sync" | ||
|
|
||
| "github.com/pingcap/TiProxy/lib/config" | ||
| "github.com/pingcap/TiProxy/lib/util/errors" | ||
| "go.uber.org/zap" | ||
| "go.uber.org/zap/zapcore" | ||
| "gopkg.in/natefinch/lumberjack.v2" | ||
| ) | ||
|
|
||
| const ( | ||
| defaultLogMaxSize = 300 // MB | ||
| ) | ||
|
|
||
| var _ closableSyncer = (*rotateLogger)(nil) | ||
| var _ closableSyncer = (*stdoutLogger)(nil) | ||
| var _ zapcore.WriteSyncer = (*AtomicWriteSyncer)(nil) | ||
|
|
||
| // Wrap the syncers as closableSyncer because lumberjack.Logger needs to be closed. | ||
| type closableSyncer interface { | ||
| zapcore.WriteSyncer | ||
| Close() error | ||
| } | ||
|
|
||
| type rotateLogger struct { | ||
| *lumberjack.Logger | ||
| } | ||
|
|
||
| func (lg *rotateLogger) Sync() error { | ||
| return nil | ||
| } | ||
|
|
||
| type stdoutLogger struct { | ||
| zapcore.WriteSyncer | ||
| } | ||
|
|
||
| func (lg *stdoutLogger) Close() error { | ||
| return nil | ||
| } | ||
|
|
||
| // AtomicWriteSyncer is a WriteSyncer that can be updated online. | ||
| type AtomicWriteSyncer struct { | ||
| sync.RWMutex | ||
| output closableSyncer | ||
| } | ||
|
|
||
| // Rebuild creates a new output and replaces the current one. | ||
| func (ws *AtomicWriteSyncer) Rebuild(cfg *config.LogOnline) error { | ||
| var output closableSyncer | ||
| if len(cfg.LogFile.Filename) > 0 { | ||
| fileLogger, err := initFileLog(&cfg.LogFile) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| output = &rotateLogger{fileLogger} | ||
| } else { | ||
| stdLogger, _, err := zap.Open([]string{"stdout"}...) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| output = &stdoutLogger{stdLogger} | ||
| } | ||
| return ws.setOutput(output) | ||
| } | ||
|
|
||
| // Write implements WriteSyncer.Write(). | ||
| func (ws *AtomicWriteSyncer) Write(p []byte) (n int, err error) { | ||
| ws.RLock() | ||
| if ws.output != nil { | ||
| n, err = ws.output.Write(p) | ||
| } | ||
| ws.RUnlock() | ||
| return | ||
| } | ||
|
|
||
| // Sync implements WriteSyncer.Sync(). | ||
| func (ws *AtomicWriteSyncer) Sync() error { | ||
| var err error | ||
| ws.RLock() | ||
| if ws.output != nil { | ||
| err = ws.output.Sync() | ||
| } | ||
| ws.RUnlock() | ||
| return err | ||
| } | ||
|
|
||
| func (ws *AtomicWriteSyncer) setOutput(output closableSyncer) error { | ||
| var err error | ||
| ws.Lock() | ||
| if ws.output != nil { | ||
| err = ws.output.Close() | ||
| } | ||
| ws.output = output | ||
| ws.Unlock() | ||
| return err | ||
| } | ||
|
|
||
| // Close closes logger. | ||
| func (ws *AtomicWriteSyncer) Close() error { | ||
| var err error | ||
| ws.Lock() | ||
| if ws.output != nil { | ||
| err = ws.output.Close() | ||
| ws.output = nil | ||
| } | ||
| ws.Unlock() | ||
| return err | ||
| } | ||
|
|
||
| // initFileLog initializes file based logging options. | ||
| func initFileLog(cfg *config.LogFile) (*lumberjack.Logger, error) { | ||
| if st, err := os.Stat(cfg.Filename); err == nil { | ||
| if st.IsDir() { | ||
| return nil, errors.New("can't use directory as log file name") | ||
| } | ||
| } | ||
| if cfg.MaxSize == 0 { | ||
| cfg.MaxSize = defaultLogMaxSize | ||
| } | ||
| return &lumberjack.Logger{ | ||
| Filename: cfg.Filename, | ||
| MaxSize: cfg.MaxSize, | ||
| MaxBackups: cfg.MaxBackups, | ||
| MaxAge: cfg.MaxDays, | ||
| LocalTime: true, | ||
| }, nil | ||
| } |
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