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jaegerthrift_to_traces.go
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jaegerthrift_to_traces.go
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// Copyright The OpenTelemetry 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 jaeger // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/jaeger"
import (
"encoding/base64"
"fmt"
"reflect"
"github.com/jaegertracing/jaeger/thrift-gen/jaeger"
"go.opentelemetry.io/collector/model/pdata"
conventions "go.opentelemetry.io/collector/model/semconv/v1.5.0"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/coreinternal/idutils"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/coreinternal/tracetranslator"
)
var blankJaegerThriftSpan = new(jaeger.Span)
// ThriftBatchToInternalTraces transforms a Thrift trace batch into pdata.Traces.
func ThriftBatchToInternalTraces(batch *jaeger.Batch) pdata.Traces {
traceData := pdata.NewTraces()
jProcess := batch.GetProcess()
jSpans := batch.GetSpans()
if jProcess == nil && len(jSpans) == 0 {
return traceData
}
rs := traceData.ResourceSpans().AppendEmpty()
jThriftProcessToInternalResource(jProcess, rs.Resource())
if len(jSpans) == 0 {
return traceData
}
jThriftSpansToInternal(jSpans, rs.InstrumentationLibrarySpans().AppendEmpty().Spans())
return traceData
}
func jThriftProcessToInternalResource(process *jaeger.Process, dest pdata.Resource) {
if process == nil {
return
}
serviceName := process.GetServiceName()
tags := process.GetTags()
if serviceName == "" && tags == nil {
return
}
attrs := dest.Attributes()
attrs.Clear()
if serviceName != "" {
attrs.EnsureCapacity(len(tags) + 1)
attrs.UpsertString(conventions.AttributeServiceName, serviceName)
} else {
attrs.EnsureCapacity(len(tags))
}
jThriftTagsToInternalAttributes(tags, attrs)
// Handle special keys translations.
translateHostnameAttr(attrs)
translateJaegerVersionAttr(attrs)
}
func jThriftSpansToInternal(spans []*jaeger.Span, dest pdata.SpanSlice) {
if len(spans) == 0 {
return
}
dest.EnsureCapacity(len(spans))
for _, span := range spans {
if span == nil || reflect.DeepEqual(span, blankJaegerThriftSpan) {
continue
}
jThriftSpanToInternal(span, dest.AppendEmpty())
}
}
func jThriftSpanToInternal(span *jaeger.Span, dest pdata.Span) {
dest.SetTraceID(idutils.UInt64ToTraceID(uint64(span.TraceIdHigh), uint64(span.TraceIdLow)))
dest.SetSpanID(idutils.UInt64ToSpanID(uint64(span.SpanId)))
dest.SetName(span.OperationName)
dest.SetStartTimestamp(microsecondsToUnixNano(span.StartTime))
dest.SetEndTimestamp(microsecondsToUnixNano(span.StartTime + span.Duration))
parentSpanID := span.ParentSpanId
if parentSpanID != 0 {
dest.SetParentSpanID(idutils.UInt64ToSpanID(uint64(parentSpanID)))
}
attrs := dest.Attributes()
attrs.EnsureCapacity(len(span.Tags))
jThriftTagsToInternalAttributes(span.Tags, attrs)
setInternalSpanStatus(attrs, dest.Status())
if spanKindAttr, ok := attrs.Get(tracetranslator.TagSpanKind); ok {
dest.SetKind(jSpanKindToInternal(spanKindAttr.StringVal()))
attrs.Delete(tracetranslator.TagSpanKind)
}
// drop the attributes slice if all of them were replaced during translation
if attrs.Len() == 0 {
attrs.Clear()
}
jThriftLogsToSpanEvents(span.Logs, dest.Events())
jThriftReferencesToSpanLinks(span.References, parentSpanID, dest.Links())
}
// jThriftTagsToInternalAttributes sets internal span links based on jaeger span references skipping excludeParentID
func jThriftTagsToInternalAttributes(tags []*jaeger.Tag, dest pdata.AttributeMap) {
for _, tag := range tags {
switch tag.GetVType() {
case jaeger.TagType_STRING:
dest.UpsertString(tag.Key, tag.GetVStr())
case jaeger.TagType_BOOL:
dest.UpsertBool(tag.Key, tag.GetVBool())
case jaeger.TagType_LONG:
dest.UpsertInt(tag.Key, tag.GetVLong())
case jaeger.TagType_DOUBLE:
dest.UpsertDouble(tag.Key, tag.GetVDouble())
case jaeger.TagType_BINARY:
dest.UpsertString(tag.Key, base64.StdEncoding.EncodeToString(tag.GetVBinary()))
default:
dest.UpsertString(tag.Key, fmt.Sprintf("<Unknown Jaeger TagType %q>", tag.GetVType()))
}
}
}
func jThriftLogsToSpanEvents(logs []*jaeger.Log, dest pdata.SpanEventSlice) {
if len(logs) == 0 {
return
}
dest.EnsureCapacity(len(logs))
for _, log := range logs {
event := dest.AppendEmpty()
event.SetTimestamp(microsecondsToUnixNano(log.Timestamp))
if len(log.Fields) == 0 {
continue
}
attrs := event.Attributes()
attrs.Clear()
attrs.EnsureCapacity(len(log.Fields))
jThriftTagsToInternalAttributes(log.Fields, attrs)
if name, ok := attrs.Get(tracetranslator.TagMessage); ok {
event.SetName(name.StringVal())
attrs.Delete(tracetranslator.TagMessage)
}
}
}
func jThriftReferencesToSpanLinks(refs []*jaeger.SpanRef, excludeParentID int64, dest pdata.SpanLinkSlice) {
if len(refs) == 0 || len(refs) == 1 && refs[0].SpanId == excludeParentID && refs[0].RefType == jaeger.SpanRefType_CHILD_OF {
return
}
dest.EnsureCapacity(len(refs))
for _, ref := range refs {
if ref.SpanId == excludeParentID && ref.RefType == jaeger.SpanRefType_CHILD_OF {
continue
}
link := dest.AppendEmpty()
link.SetTraceID(idutils.UInt64ToTraceID(uint64(ref.TraceIdHigh), uint64(ref.TraceIdLow)))
link.SetSpanID(idutils.UInt64ToSpanID(uint64(ref.SpanId)))
}
}
// microsecondsToUnixNano converts epoch microseconds to pdata.Timestamp
func microsecondsToUnixNano(ms int64) pdata.Timestamp {
return pdata.Timestamp(uint64(ms) * 1000)
}