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The zerolog functionality is not worth the effort to maintain the dependency tree brought by this package from the packaging point of view. We can always revert this is it turns out that we need performance capabilities of the library.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| package logging | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| type LogLevel int | ||
|
|
||
| const ( | ||
| DEBUG LogLevel = iota | ||
| INFO | ||
| WARN | ||
| ERROR | ||
| ) | ||
|
|
||
| func (self LogLevel) String() string { | ||
| return [...]string{"DEBUG", "INFO", "WARN", "ERROR"}[self] | ||
| } | ||
|
|
||
| type Logger struct { | ||
| Level LogLevel | ||
| Timestamp bool | ||
| metadata map[string]interface{} | ||
| logfile *os.File | ||
| } | ||
|
|
||
| func NewLogger(level LogLevel, path string) (*Logger, error) { | ||
| var logger Logger | ||
| logger.Level = level | ||
| logger.Timestamp = false | ||
| logger.metadata = make(map[string]interface{}) | ||
|
|
||
| logfile, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| logger.logfile = logfile | ||
|
|
||
| return &logger, nil | ||
| } | ||
|
|
||
| func (self *Logger) Destroy() error { | ||
| return self.logfile.Close() | ||
| } | ||
|
|
||
| func (self *Logger) Metadata(metadata map[string]interface{}) { | ||
| self.metadata = metadata | ||
| } | ||
|
|
||
| func (self *Logger) formatMetadata() (string, error) { | ||
| var build strings.Builder | ||
| if len(self.metadata) > 0 { | ||
| joiner := "" | ||
| for key, item := range self.metadata { | ||
| _, err := fmt.Fprintf(&build, "%s%s: %v", joiner, key, item) | ||
| if err != nil { | ||
| return build.String(), err | ||
| } | ||
| if len(joiner) == 0 { | ||
| joiner = ", " | ||
| } | ||
| } | ||
| } | ||
| // clear metadata for next use | ||
| self.metadata = make(map[string]interface{}) | ||
| return build.String(), nil | ||
| } | ||
|
|
||
| func (self *Logger) writeRecord(level LogLevel, message string) error { | ||
| metadata, err := self.formatMetadata() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| var build strings.Builder | ||
| if self.Timestamp { | ||
| _, err = build.WriteString(time.Now().Format("2006-01-02 15:04:05 ")) | ||
| } | ||
|
|
||
| _, err = build.WriteString(fmt.Sprintf("[%s] ", level)) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| _, err = build.WriteString(message) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| if len(metadata) > 0 { | ||
| _, err = build.WriteString(fmt.Sprintf(" [%s]", metadata)) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| } | ||
| _, err = build.WriteString("\n") | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| _, err = self.logfile.WriteString(build.String()) | ||
| return err | ||
| } | ||
|
|
||
| func (self *Logger) Debug(message string) error { | ||
| if self.Level == DEBUG { | ||
| return self.writeRecord(DEBUG, message) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (self *Logger) Info(message string) error { | ||
| if self.Level <= INFO { | ||
| return self.writeRecord(INFO, message) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (self *Logger) Warn(message string) error { | ||
| if self.Level <= WARN { | ||
| return self.writeRecord(WARN, message) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (self *Logger) Error(message string) error { | ||
| if self.Level <= ERROR { | ||
| return self.writeRecord(ERROR, message) | ||
| } | ||
| return nil | ||
| } |
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