78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package jaeger
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import (
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"github.com/opentracing/opentracing-go/log"
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"github.com/uber/jaeger-client-go/internal/baggage"
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)
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// baggageSetter is an actor that can set a baggage value on a Span given certain
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// restrictions (eg. maxValueLength).
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type baggageSetter struct {
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restrictionManager baggage.RestrictionManager
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metrics *Metrics
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}
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func newBaggageSetter(restrictionManager baggage.RestrictionManager, metrics *Metrics) *baggageSetter {
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return &baggageSetter{
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restrictionManager: restrictionManager,
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metrics: metrics,
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}
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}
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// (NB) span should hold the lock before making this call
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func (s *baggageSetter) setBaggage(span *Span, key, value string) {
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var truncated bool
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var prevItem string
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restriction := s.restrictionManager.GetRestriction(span.serviceName(), key)
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if !restriction.KeyAllowed() {
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s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
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s.metrics.BaggageUpdateFailure.Inc(1)
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return
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}
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if len(value) > restriction.MaxValueLength() {
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truncated = true
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value = value[:restriction.MaxValueLength()]
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s.metrics.BaggageTruncate.Inc(1)
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}
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prevItem = span.context.baggage[key]
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s.logFields(span, key, value, prevItem, truncated, restriction.KeyAllowed())
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span.context = span.context.WithBaggageItem(key, value)
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s.metrics.BaggageUpdateSuccess.Inc(1)
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}
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func (s *baggageSetter) logFields(span *Span, key, value, prevItem string, truncated, valid bool) {
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if !span.context.IsSampled() {
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return
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}
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fields := []log.Field{
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log.String("event", "baggage"),
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log.String("key", key),
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log.String("value", value),
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}
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if prevItem != "" {
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fields = append(fields, log.String("override", "true"))
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}
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if truncated {
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fields = append(fields, log.String("truncated", "true"))
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}
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if !valid {
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fields = append(fields, log.String("invalid", "true"))
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}
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span.logFieldsNoLocking(fields...)
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}
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