/
propagation.go
90 lines (79 loc) · 2.75 KB
/
propagation.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package internal
import (
"context"
"time"
"github.com/opentracing/opentracing-go"
)
const (
workflowTag = "cadenceWorkflowID"
runTag = "cadenceRunID"
)
// createOpenTracingWorkflowSpan creates a new context with a workflow started span
func createOpenTracingWorkflowSpan(
ctx context.Context,
tracer opentracing.Tracer,
start time.Time,
workflowType, workflowID string,
) (context.Context, opentracing.Span) {
tags := opentracing.Tags{
workflowTag: workflowID,
}
return createOpenTracingSpan(ctx, tracer, start, workflowType, tags)
}
// createOpenTracingActivitySpan creates a new context with an activity started span
func createOpenTracingActivitySpan(
ctx context.Context,
tracer opentracing.Tracer,
start time.Time,
activityType, workflowID, runID string,
) (context.Context, opentracing.Span) {
tags := opentracing.Tags{
workflowTag: workflowID,
runTag: runID,
}
return createOpenTracingSpan(ctx, tracer, start, activityType, tags)
}
func createOpenTracingSpan(
ctx context.Context,
tracer opentracing.Tracer,
start time.Time,
name string,
tags opentracing.Tags,
) (context.Context, opentracing.Span) {
if _, ok := tracer.(opentracing.NoopTracer); ok {
return ctx, tracer.StartSpan("StartWorkflow-Span")
}
var parent opentracing.SpanContext
if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
parent = parentSpan.Context()
} else if spanCtx, ok := ctx.Value(activeSpanContextKey).(opentracing.SpanContext); ok {
parent = spanCtx
}
span := tracer.StartSpan(
name,
opentracing.StartTime(start),
opentracing.FollowsFrom(parent),
tags,
)
ctx = opentracing.ContextWithSpan(ctx, span)
return ctx, span
}