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config.go
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config.go
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// Copyright (c) 2016 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 log
import (
"fmt"
"go.uber.org/zap"
)
// Configuration defines configuration for logging.
type Configuration struct {
File string `json:"file" yaml:"file"`
Level string `json:"level" yaml:"level"`
Fields map[string]interface{} `json:"fields" yaml:"fields"`
}
// BuildLogger builds a new Logger based on the configuration.
func (cfg Configuration) BuildLogger() (*zap.Logger, error) {
zc := zap.Config{
Level: zap.NewAtomicLevelAt(zap.InfoLevel),
Development: false,
DisableCaller: true,
DisableStacktrace: true,
Sampling: &zap.SamplingConfig{
Initial: 100,
Thereafter: 100,
},
Encoding: "json",
EncoderConfig: zap.NewProductionEncoderConfig(),
OutputPaths: []string{"stdout"},
ErrorOutputPaths: []string{"stdout"},
InitialFields: cfg.Fields,
}
if cfg.File != "" {
zc.OutputPaths = append(zc.OutputPaths, cfg.File)
zc.ErrorOutputPaths = append(zc.ErrorOutputPaths, cfg.File)
}
if len(cfg.Level) != 0 {
var parsedLevel zap.AtomicLevel
if err := parsedLevel.UnmarshalText([]byte(cfg.Level)); err != nil {
return nil, fmt.Errorf("unable to parse log level %s: %v", cfg.Level, err)
}
zc.Level = parsedLevel
}
return zc.Build()
}