/
metrics.go
66 lines (61 loc) · 2.46 KB
/
metrics.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package ulog
import (
"fmt"
"github.com/uber-go/tally"
"go.uber.org/zap/zapcore"
)
// Metrics returns a function that counts the number of logs emitted by level.
//
// To register it with a zap.Logger, use zap.Hooks.
func Metrics(s tally.Scope) func(zapcore.Entry) error {
// Avoid allocating strings and maps in the request path.
debugC := s.Tagged(map[string]string{"level": "debug"}).Counter("logs")
infoC := s.Tagged(map[string]string{"level": "info"}).Counter("logs")
warnC := s.Tagged(map[string]string{"level": "warn"}).Counter("logs")
errorC := s.Tagged(map[string]string{"level": "error"}).Counter("logs")
dpanicC := s.Tagged(map[string]string{"level": "dpanic"}).Counter("logs")
panicC := s.Tagged(map[string]string{"level": "panic"}).Counter("logs")
fatalC := s.Tagged(map[string]string{"level": "fatal"}).Counter("logs")
unknownC := s.Tagged(map[string]string{"level": "unknown"}).Counter("logs")
return func(e zapcore.Entry) error {
switch e.Level {
case zapcore.DebugLevel:
debugC.Inc(1)
case zapcore.InfoLevel:
infoC.Inc(1)
case zapcore.WarnLevel:
warnC.Inc(1)
case zapcore.ErrorLevel:
errorC.Inc(1)
case zapcore.DPanicLevel:
dpanicC.Inc(1)
case zapcore.PanicLevel:
panicC.Inc(1)
case zapcore.FatalLevel:
fatalC.Inc(1)
default:
unknownC.Inc(1)
return fmt.Errorf("unknown log level: %s", e.Level)
}
return nil
}
}