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opentelemetry-go/bridge/opencensus/utils/utils.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 utils // import "go.opentelemetry.io/otel/bridge/opencensus/utils"
import (
"fmt"
octrace "go.opencensus.io/trace"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/trace"
)
// OTelSpanContextToOC converts from an OpenTelemetry SpanContext to an
// OpenCensus SpanContext, and handles any incompatibilities with the global
// error handler.
func OTelSpanContextToOC(sc trace.SpanContext) octrace.SpanContext {
if sc.IsDebug() || sc.IsDeferred() {
otel.Handle(fmt.Errorf("ignoring OpenTelemetry Debug or Deferred trace flags for span %q because they are not supported by OpenCensus", sc.SpanID()))
}
var to octrace.TraceOptions
if sc.IsSampled() {
// OpenCensus doesn't expose functions to directly set sampled
to = 0x1
}
return octrace.SpanContext{
TraceID: octrace.TraceID(sc.TraceID()),
SpanID: octrace.SpanID(sc.SpanID()),
TraceOptions: to,
}
}
// OCSpanContextToOTel converts from an OpenCensus SpanContext to an
// OpenTelemetry SpanContext.
func OCSpanContextToOTel(sc octrace.SpanContext) trace.SpanContext {
var traceFlags byte
if sc.IsSampled() {
traceFlags = trace.FlagsSampled
}
return trace.NewSpanContext(trace.SpanContextConfig{
TraceID: trace.TraceID(sc.TraceID),
SpanID: trace.SpanID(sc.SpanID),
TraceFlags: traceFlags,
})
}