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traces_batch.go
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/
traces_batch.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package exporterhelper // import "go.opentelemetry.io/collector/exporter/exporterhelper"
import (
"context"
"errors"
"go.opentelemetry.io/collector/exporter/exporterbatcher"
"go.opentelemetry.io/collector/pdata/ptrace"
)
// mergeTraces merges two traces requests into one.
func mergeTraces(_ context.Context, r1 Request, r2 Request) (Request, error) {
tr1, ok1 := r1.(*tracesRequest)
tr2, ok2 := r2.(*tracesRequest)
if !ok1 || !ok2 {
return nil, errors.New("invalid input type")
}
tr2.td.ResourceSpans().MoveAndAppendTo(tr1.td.ResourceSpans())
return tr1, nil
}
// mergeSplitTraces splits and/or merges the traces into multiple requests based on the MaxSizeConfig.
func mergeSplitTraces(_ context.Context, cfg exporterbatcher.MaxSizeConfig, r1 Request, r2 Request) ([]Request, error) {
var (
res []Request
destReq *tracesRequest
capacityLeft = cfg.MaxSizeItems
)
for _, req := range []Request{r1, r2} {
if req == nil {
continue
}
srcReq, ok := req.(*tracesRequest)
if !ok {
return nil, errors.New("invalid input type")
}
if srcReq.td.SpanCount() <= capacityLeft {
if destReq == nil {
destReq = srcReq
} else {
srcReq.td.ResourceSpans().MoveAndAppendTo(destReq.td.ResourceSpans())
}
capacityLeft -= destReq.td.SpanCount()
continue
}
for {
extractedTraces := extractTraces(srcReq.td, capacityLeft)
if extractedTraces.SpanCount() == 0 {
break
}
capacityLeft -= extractedTraces.SpanCount()
if destReq == nil {
destReq = &tracesRequest{td: extractedTraces, pusher: srcReq.pusher}
} else {
extractedTraces.ResourceSpans().MoveAndAppendTo(destReq.td.ResourceSpans())
}
// Create new batch once capacity is reached.
if capacityLeft == 0 {
res = append(res, destReq)
destReq = nil
capacityLeft = cfg.MaxSizeItems
}
}
}
if destReq != nil {
res = append(res, destReq)
}
return res, nil
}
// extractTraces extracts a new traces with a maximum number of spans.
func extractTraces(srcTraces ptrace.Traces, count int) ptrace.Traces {
destTraces := ptrace.NewTraces()
srcTraces.ResourceSpans().RemoveIf(func(srcRS ptrace.ResourceSpans) bool {
if count == 0 {
return false
}
needToExtract := resourceTracesCount(srcRS) > count
if needToExtract {
srcRS = extractResourceSpans(srcRS, count)
}
count -= resourceTracesCount(srcRS)
srcRS.MoveTo(destTraces.ResourceSpans().AppendEmpty())
return !needToExtract
})
return destTraces
}
// extractResourceSpans extracts spans and returns a new resource spans with the specified number of spans.
func extractResourceSpans(srcRS ptrace.ResourceSpans, count int) ptrace.ResourceSpans {
destRS := ptrace.NewResourceSpans()
destRS.SetSchemaUrl(srcRS.SchemaUrl())
srcRS.Resource().CopyTo(destRS.Resource())
srcRS.ScopeSpans().RemoveIf(func(srcSS ptrace.ScopeSpans) bool {
if count == 0 {
return false
}
needToExtract := srcSS.Spans().Len() > count
if needToExtract {
srcSS = extractScopeSpans(srcSS, count)
}
count -= srcSS.Spans().Len()
srcSS.MoveTo(destRS.ScopeSpans().AppendEmpty())
return !needToExtract
})
srcRS.Resource().CopyTo(destRS.Resource())
return destRS
}
// extractScopeSpans extracts spans and returns a new scope spans with the specified number of spans.
func extractScopeSpans(srcSS ptrace.ScopeSpans, count int) ptrace.ScopeSpans {
destSS := ptrace.NewScopeSpans()
destSS.SetSchemaUrl(srcSS.SchemaUrl())
srcSS.Scope().CopyTo(destSS.Scope())
srcSS.Spans().RemoveIf(func(srcSpan ptrace.Span) bool {
if count == 0 {
return false
}
srcSpan.MoveTo(destSS.Spans().AppendEmpty())
count--
return true
})
return destSS
}
// resourceTracesCount calculates the total number of spans in the pdata.ResourceSpans.
func resourceTracesCount(rs ptrace.ResourceSpans) int {
count := 0
rs.ScopeSpans().RemoveIf(func(ss ptrace.ScopeSpans) bool {
count += ss.Spans().Len()
return false
})
return count
}