traefik/vendor/github.com/openzipkin-contrib/zipkin-go-opentracing/log-materializers.go

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2018-01-10 16:48:04 +00:00
// Copyright (c) 2016 Uber Technologies, Inc.
// Copyright (c) 2016 Bas van Beek
// 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 zipkintracer
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"github.com/go-logfmt/logfmt"
"github.com/opentracing/opentracing-go/log"
)
var errEventLogNotFound = errors.New("event log field not found")
type fieldsAsMap map[string]string
// MaterializeWithJSON converts log Fields into JSON string
func MaterializeWithJSON(logFields []log.Field) ([]byte, error) {
fields := fieldsAsMap(make(map[string]string, len(logFields)))
for _, field := range logFields {
field.Marshal(fields)
}
return json.Marshal(fields)
}
// MaterializeWithLogFmt converts log Fields into LogFmt string
func MaterializeWithLogFmt(logFields []log.Field) ([]byte, error) {
var (
buffer = bytes.NewBuffer(nil)
encoder = logfmt.NewEncoder(buffer)
)
for _, field := range logFields {
if err := encoder.EncodeKeyval(field.Key(), field.Value()); err != nil {
encoder.EncodeKeyval(field.Key(), err.Error())
}
}
return buffer.Bytes(), nil
}
// StrictZipkinMaterializer will only record a log.Field of type "event".
func StrictZipkinMaterializer(logFields []log.Field) ([]byte, error) {
for _, field := range logFields {
if field.Key() == "event" {
return []byte(fmt.Sprintf("%+v", field.Value())), nil
}
}
return nil, errEventLogNotFound
}
func (ml fieldsAsMap) EmitString(key, value string) {
ml[key] = value
}
func (ml fieldsAsMap) EmitBool(key string, value bool) {
ml[key] = fmt.Sprintf("%t", value)
}
func (ml fieldsAsMap) EmitInt(key string, value int) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitInt32(key string, value int32) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitInt64(key string, value int64) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitUint32(key string, value uint32) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitUint64(key string, value uint64) {
ml[key] = fmt.Sprintf("%d", value)
}
func (ml fieldsAsMap) EmitFloat32(key string, value float32) {
ml[key] = fmt.Sprintf("%f", value)
}
func (ml fieldsAsMap) EmitFloat64(key string, value float64) {
ml[key] = fmt.Sprintf("%f", value)
}
func (ml fieldsAsMap) EmitObject(key string, value interface{}) {
ml[key] = fmt.Sprintf("%+v", value)
}
func (ml fieldsAsMap) EmitLazyLogger(value log.LazyLogger) {
value(ml)
}