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root_span_handler.go
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/
root_span_handler.go
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// Copyright (c) 2021 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package app
import (
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/collector/app/sampling/strategystore"
"github.com/jaegertracing/jaeger/model"
)
// handleRootSpan returns a function that records throughput for root spans
func handleRootSpan(aggregator strategystore.Aggregator, logger *zap.Logger) ProcessSpan {
return func(span *model.Span, tenant string) {
// TODO simply checking parentId to determine if a span is a root span is not sufficient. However,
// we can be sure that only a root span will have sampler tags.
if span.ParentSpanID() != model.NewSpanID(0) {
return
}
service := span.Process.ServiceName
if service == "" || span.OperationName == "" {
return
}
samplerType, samplerParam := span.GetSamplerParams(logger)
if samplerType == model.SamplerTypeUnrecognized {
return
}
aggregator.RecordThroughput(service, span.OperationName, samplerType, samplerParam)
}
}