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/*
* Copyright 2018 Expedia Group.
*
* 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 haystack
import (
"fmt"
)
/*SpanContext implements opentracing.spanContext*/
type SpanContext struct {
// traceID represents globally unique ID of the trace.
TraceID string
// spanID represents span ID that must be unique within its trace
SpanID string
// parentID refers to the ID of the parent span.
// Should be empty if the current span is a root span.
ParentID string
//Context baggage. The is a snapshot in time.
Baggage map[string]string
// set to true if extracted using a extractor in tracer
IsExtractedContext bool
}
// IsValid indicates whether this context actually represents a valid trace.
func (context SpanContext) IsValid() bool {
return context.TraceID != "" && context.SpanID != ""
}
/*ForeachBaggageItem implements opentracing.spancontext*/
func (context SpanContext) ForeachBaggageItem(handler func(k, v string) bool) {
for k, v := range context.Baggage {
if !handler(k, v) {
break
}
}
}
// WithBaggageItem creates a new context with an extra baggage item.
func (context SpanContext) WithBaggageItem(key, value string) *SpanContext {
var newBaggage map[string]string
if context.Baggage == nil {
newBaggage = map[string]string{key: value}
} else {
newBaggage = make(map[string]string, len(context.Baggage)+1)
for k, v := range context.Baggage {
newBaggage[k] = v
}
newBaggage[key] = value
}
return &SpanContext{
TraceID: context.TraceID,
SpanID: context.SpanID,
ParentID: context.ParentID,
Baggage: newBaggage,
}
}
/*ToString represents the string*/
func (context SpanContext) ToString() string {
return fmt.Sprintf("%+v", context)
}
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