| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 util |
| |
| import ( |
| "fmt" |
| "github.com/ServiceComb/paas-lager" |
| "github.com/ServiceComb/paas-lager/third_party/forked/cloudfoundry/lager" |
| "golang.org/x/net/context" |
| "os" |
| "path/filepath" |
| "runtime" |
| "strings" |
| "sync" |
| "time" |
| ) |
| |
| //log var |
| var ( |
| LOGGER lager.Logger |
| defaultLagerConfig = stlager.DefaultConfig() |
| loggerConfig LoggerConfig |
| logLevel lager.LogLevel |
| |
| loggers map[string]lager.Logger |
| loggerNames map[string]string |
| loggersMux sync.RWMutex |
| |
| stdOutWriters = []string{"stdout"} |
| fileWriters = []string{"file"} |
| ) |
| |
| // LoggerConfig struct for lager and rotate parameters |
| type LoggerConfig struct { |
| LoggerLevel string |
| LoggerFile string |
| LogFormatText bool |
| LogRotatePeriod time.Duration |
| LogRotateSize int |
| LogBackupCount int |
| } |
| |
| func init() { |
| loggers = make(map[string]lager.Logger, 10) |
| loggerNames = make(map[string]string, 10) |
| // make LOGGER do not be nil, new a stdout logger |
| LOGGER = NewLogger(fromLagerConfig(defaultLagerConfig)) |
| } |
| |
| func fromLagerConfig(c *stlager.Config) LoggerConfig { |
| return LoggerConfig{ |
| LoggerLevel: c.LoggerLevel, |
| LoggerFile: c.LoggerFile, |
| LogFormatText: c.LogFormatText, |
| } |
| } |
| |
| func toLagerConfig(c LoggerConfig) stlager.Config { |
| w := fileWriters |
| if len(c.LoggerFile) == 0 { |
| w = stdOutWriters |
| } |
| return stlager.Config{ |
| Writers: w, |
| LoggerLevel: c.LoggerLevel, |
| LoggerFile: c.LoggerFile, |
| LogFormatText: c.LogFormatText, |
| } |
| } |
| |
| // newLog new log, unsafe |
| func NewLogger(cfg LoggerConfig) lager.Logger { |
| stlager.Init(toLagerConfig(cfg)) |
| return stlager.NewLogger(cfg.LoggerFile) |
| } |
| |
| func InitGlobalLogger(cfg LoggerConfig) { |
| // renew the global logger |
| if len(cfg.LoggerLevel) == 0 { |
| cfg.LoggerLevel = defaultLagerConfig.LoggerLevel |
| } |
| loggerConfig = cfg |
| LOGGER = NewLogger(cfg) |
| // log rotate |
| RunLogDirRotate(cfg) |
| // recreate the deleted log file |
| switch strings.ToUpper(cfg.LoggerLevel) { |
| case "INFO": |
| logLevel = lager.INFO |
| case "WARN": |
| logLevel = lager.WARN |
| case "ERROR": |
| logLevel = lager.ERROR |
| case "FATAL": |
| logLevel = lager.FATAL |
| default: |
| logLevel = lager.DEBUG |
| } |
| monitorLogFile() |
| } |
| |
| func Logger() lager.Logger { |
| if len(loggerNames) == 0 { |
| return LOGGER |
| } |
| funcFullName := getCalleeFuncName() |
| |
| for prefix, logFile := range loggerNames { |
| if strings.Index(prefix, "/") < 0 { |
| // function name |
| if prefix != funcFullName[strings.LastIndex(funcFullName, " ")+1:] { |
| continue |
| } |
| } else { |
| // package name |
| if strings.Index(funcFullName, prefix) < 0 { |
| continue |
| } |
| } |
| loggersMux.RLock() |
| logger, ok := loggers[logFile] |
| loggersMux.RUnlock() |
| if ok { |
| return logger |
| } |
| |
| loggersMux.Lock() |
| logger, ok = loggers[logFile] |
| if !ok { |
| cfg := loggerConfig |
| if len(cfg.LoggerFile) != 0 { |
| cfg.LoggerFile = filepath.Join(filepath.Dir(cfg.LoggerFile), logFile+".log") |
| } |
| logger = NewLogger(cfg) |
| loggers[logFile] = logger |
| LOGGER.Warnf(nil, "match %s, new logger %s for %s", prefix, logFile, funcFullName) |
| } |
| loggersMux.Unlock() |
| return logger |
| } |
| |
| return LOGGER |
| } |
| |
| func getCalleeFuncName() string { |
| fullName := "" |
| for i := 2; i <= 4; i++ { |
| pc, file, _, ok := runtime.Caller(i) |
| |
| if strings.Index(file, "/log.go") > 0 { |
| continue |
| } |
| |
| if ok { |
| idx := strings.LastIndex(file, "/src/") |
| switch { |
| case idx >= 0: |
| fullName = file[idx+4:] |
| default: |
| fullName = file |
| } |
| |
| if f := runtime.FuncForPC(pc); f != nil { |
| fullName += " " + FormatFuncName(f.Name()) |
| } |
| } |
| break |
| } |
| return fullName |
| } |
| |
| func CustomLogger(pkgOrFunc, fileName string) { |
| loggerNames[pkgOrFunc] = fileName |
| } |
| |
| func monitorLogFile() { |
| if len(loggerConfig.LoggerFile) == 0 { |
| return |
| } |
| Go(func(ctx context.Context) { |
| for { |
| select { |
| case <-ctx.Done(): |
| return |
| case <-time.After(time.Minute): |
| Logger().Debug(fmt.Sprintf("Check log file at %s", time.Now())) |
| |
| if !PathExist(loggerConfig.LoggerFile) { |
| file, err := os.OpenFile(loggerConfig.LoggerFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600) |
| if err != nil { |
| Logger().Errorf(err, "Create log file failed.") |
| return |
| } |
| // TODO Here will lead to file handle leak |
| sink := lager.NewReconfigurableSink(lager.NewWriterSink("file", file, lager.DEBUG), logLevel) |
| Logger().RegisterSink(sink) |
| Logger().Errorf(nil, "log file is removed, create again.") |
| } |
| } |
| } |
| }) |
| } |
| |
| func LogNilOrWarnf(start time.Time, format string, args ...interface{}) { |
| cost := time.Now().Sub(start) |
| if cost < time.Second { |
| return |
| } |
| Logger().Warnf(nil, "[%s]%s", cost, fmt.Sprintf(format, args...)) |
| } |
| |
| func LogDebugOrWarnf(start time.Time, format string, args ...interface{}) { |
| cost := time.Now().Sub(start) |
| if cost < time.Second { |
| Logger().Debugf("[%s]%s", cost, fmt.Sprintf(format, args...)) |
| return |
| } |
| Logger().Warnf(nil, "[%s]%s", cost, fmt.Sprintf(format, args...)) |
| } |
| |
| func LogInfoOrWarnf(start time.Time, format string, args ...interface{}) { |
| cost := time.Now().Sub(start) |
| if cost < time.Second { |
| Logger().Infof("[%s]%s", cost, fmt.Sprintf(format, args...)) |
| return |
| } |
| Logger().Warnf(nil, "[%s]%s", cost, fmt.Sprintf(format, args...)) |
| } |