Refactor Logger (#13294)
Refactor Logger to make a logger interface and make it possible to wrap loggers for specific purposes. Co-authored-by: techknowlogick <techknowlogick@gitea.io>tokarchuk/v1.17
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// Copyright 2020 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package log |
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import ( |
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"fmt" |
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"runtime" |
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"strings" |
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"time" |
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) |
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// MultiChannelledLogger is default logger in the Gitea application.
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// it can contain several providers and log message into all providers.
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type MultiChannelledLogger struct { |
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LevelLoggerLogger |
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*MultiChannelledLog |
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bufferLength int64 |
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} |
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// newLogger initializes and returns a new logger.
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func newLogger(name string, buffer int64) *MultiChannelledLogger { |
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l := &MultiChannelledLogger{ |
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MultiChannelledLog: NewMultiChannelledLog(name, buffer), |
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bufferLength: buffer, |
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} |
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l.LevelLogger = l |
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return l |
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} |
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// SetLogger sets new logger instance with given logger provider and config.
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func (l *MultiChannelledLogger) SetLogger(name, provider, config string) error { |
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eventLogger, err := NewChannelledLog(name, provider, config, l.bufferLength) |
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if err != nil { |
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return fmt.Errorf("Failed to create sublogger (%s): %v", name, err) |
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} |
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l.MultiChannelledLog.DelLogger(name) |
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err = l.MultiChannelledLog.AddLogger(eventLogger) |
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if err != nil { |
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if IsErrDuplicateName(err) { |
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return fmt.Errorf("Duplicate named sublogger %s %v", name, l.MultiChannelledLog.GetEventLoggerNames()) |
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} |
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return fmt.Errorf("Failed to add sublogger (%s): %v", name, err) |
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} |
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return nil |
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} |
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// DelLogger deletes a sublogger from this logger.
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func (l *MultiChannelledLogger) DelLogger(name string) (bool, error) { |
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return l.MultiChannelledLog.DelLogger(name), nil |
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} |
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// Log msg at the provided level with the provided caller defined by skip (0 being the function that calls this function)
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func (l *MultiChannelledLogger) Log(skip int, level Level, format string, v ...interface{}) error { |
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if l.GetLevel() > level { |
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return nil |
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} |
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caller := "?()" |
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pc, filename, line, ok := runtime.Caller(skip + 1) |
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if ok { |
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// Get caller function name.
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fn := runtime.FuncForPC(pc) |
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if fn != nil { |
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caller = fn.Name() + "()" |
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} |
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} |
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msg := format |
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if len(v) > 0 { |
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msg = ColorSprintf(format, v...) |
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} |
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stack := "" |
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if l.GetStacktraceLevel() <= level { |
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stack = Stack(skip + 1) |
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} |
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return l.SendLog(level, caller, strings.TrimPrefix(filename, prefix), line, msg, stack) |
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} |
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// SendLog sends a log event at the provided level with the information given
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func (l *MultiChannelledLogger) SendLog(level Level, caller, filename string, line int, msg string, stack string) error { |
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if l.GetLevel() > level { |
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return nil |
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} |
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event := &Event{ |
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level: level, |
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caller: caller, |
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filename: filename, |
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line: line, |
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msg: msg, |
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time: time.Now(), |
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stacktrace: stack, |
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} |
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l.LogEvent(event) |
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return nil |
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} |
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