mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-12 10:04:29 +02:00
0eeb8f87e9
* Refactor TraceState * Update tracecontext propagator to use new TraceState * Add TraceStateFromKeyValues to oteltest * Use oteltest to test TraceState * Replace IsEmpty with Len for TraceState * Replace ParseTraceState with ParseTraceStateString * Clean up naming * Add immutability test for TraceState * Add changes to changelog * Fixes * Document argument type change in changelog * Address feedback Remove circularity of TestTraceStateLen.
42 lines
1.5 KiB
Go
42 lines
1.5 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package oteltest
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import (
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"fmt"
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"strings"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/trace"
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)
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// TraceStateFromKeyValues is a convenience function to create a
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// trace.TraceState from provided key/value pairs. There is no inverse to this
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// function, returning attributes from a TraceState, because the TraceState,
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// by definition from the W3C tracecontext specification, stores values as
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// opaque strings. Therefore, it is not possible to decode the original value
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// type from TraceState. Be sure to not use this outside of testing purposes.
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func TraceStateFromKeyValues(kvs ...attribute.KeyValue) (trace.TraceState, error) {
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if len(kvs) == 0 {
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return trace.TraceState{}, nil
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}
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members := make([]string, len(kvs))
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for i, kv := range kvs {
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members[i] = fmt.Sprintf("%s=%s", string(kv.Key), kv.Value.Emit())
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}
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return trace.ParseTraceState(strings.Join(members, ","))
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}
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