/
parameterized.go
163 lines (134 loc) · 3.94 KB
/
parameterized.go
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package tracegen
import (
"encoding/hex"
"fmt"
"math/rand"
"time"
"unsafe"
"github.com/grafana/xk6-client-tracing/pkg/random"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/ptrace"
)
const (
defaultSpanCount = 10
defaultSpanSize = 1000
)
type TraceParams struct {
ID string `json:"id"`
RandomServiceName bool `json:"random_service_name"`
Spans SpanParams `json:"spans"`
}
type SpanParams struct {
Count int `json:"count"`
Size int `json:"size"`
RandomName bool `json:"random_name"`
FixedAttrs map[string]interface{} `json:"fixed_attrs"`
}
func (tp *TraceParams) setDefaults() {
if tp.Spans.Count == 0 {
tp.Spans.Count = defaultSpanCount
}
if tp.Spans.Size <= 0 {
tp.Spans.Size = defaultSpanSize
}
}
func NewParameterizedGenerator(traceParams []*TraceParams) *ParameterizedGenerator {
for _, tp := range traceParams {
tp.setDefaults()
}
return &ParameterizedGenerator{
traceParams: traceParams,
}
}
type ParameterizedGenerator struct {
traceParams []*TraceParams
}
func (g *ParameterizedGenerator) Traces() ptrace.Traces {
traceData := ptrace.NewTraces()
resourceSpans := traceData.ResourceSpans()
resourceSpans.EnsureCapacity(len(g.traceParams))
for _, te := range g.traceParams {
rspan := resourceSpans.AppendEmpty()
serviceName := random.Service()
if te.RandomServiceName {
serviceName += "." + random.String(5)
}
rspan.Resource().Attributes().PutStr("k6", "true")
rspan.Resource().Attributes().PutStr("service.name", serviceName)
ilss := rspan.ScopeSpans()
ilss.EnsureCapacity(1)
ils := ilss.AppendEmpty()
ils.Scope().SetName("k6")
if te.ID == "" {
te.ID = random.TraceID().String()
}
// Spans
sps := ils.Spans()
sps.EnsureCapacity(te.Spans.Count)
for e := 0; e < te.Spans.Count; e++ {
g.generateSpan(te, sps.AppendEmpty())
}
}
return traceData
}
func (g *ParameterizedGenerator) generateSpan(t *TraceParams, dest ptrace.Span) {
endTime := time.Now().Round(time.Second)
startTime := endTime.Add(-time.Duration(rand.Intn(500)+10) * time.Millisecond)
var traceID pcommon.TraceID
b, _ := hex.DecodeString(t.ID)
copy(traceID[:], b)
spanName := random.Operation()
if t.Spans.RandomName {
spanName += "." + random.String(5)
}
span := ptrace.NewSpan()
span.SetTraceID(traceID)
span.SetSpanID(random.SpanID())
span.SetParentSpanID(random.SpanID())
span.SetName(spanName)
span.SetKind(ptrace.SpanKindClient)
span.SetStartTimestamp(pcommon.NewTimestampFromTime(startTime))
span.SetEndTimestamp(pcommon.NewTimestampFromTime(endTime))
span.TraceState().FromRaw("x:y")
event := span.Events().AppendEmpty()
event.SetName(random.K6String(12))
event.SetTimestamp(pcommon.NewTimestampFromTime(startTime))
event.Attributes().PutStr(random.K6String(5), random.K6String(12))
link := span.Links().AppendEmpty()
link.SetTraceID(traceID)
link.SetSpanID(random.SpanID())
link.Attributes().PutStr(random.K6String(12), random.K6String(12))
status := span.Status()
status.SetCode(1)
status.SetMessage("OK")
attrs := pcommon.NewMap()
if len(t.Spans.FixedAttrs) > 0 {
g.constructSpanAttributes(t.Spans.FixedAttrs, attrs)
}
// Fill the span with some random data
var size int64
for {
if size >= int64(t.Spans.Size) {
break
}
rKey := random.K6String(rand.Intn(15))
rVal := random.K6String(rand.Intn(15))
attrs.PutStr(rKey, rVal)
size += int64(unsafe.Sizeof(rKey)) + int64(unsafe.Sizeof(rVal))
}
attrs.CopyTo(span.Attributes())
span.CopyTo(dest)
}
func (g *ParameterizedGenerator) constructSpanAttributes(attributes map[string]interface{}, dst pcommon.Map) {
attrs := pcommon.NewMap()
for key, value := range attributes {
if cast, ok := value.(int); ok {
attrs.PutInt(key, int64(cast))
} else if cast, ok := value.(int64); ok {
attrs.PutInt(key, cast)
} else {
attrs.PutStr(key, fmt.Sprintf("%v", value))
}
}
attrs.CopyTo(dst)
}