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span.go
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span.go
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// Copyright (c) 2019 Cisco and/or its affiliates.
//
// 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 common
import (
"context"
"github.com/opentracing/opentracing-go"
"github.com/networkservicemesh/networkservicemesh/controlplane/pkg/model"
"github.com/networkservicemesh/networkservicemesh/pkg/tools/spanhelper"
)
// SpanHelperFromConnection - construct new span helper with span from context is present or span from connection object
func SpanHelperFromConnection(ctx context.Context, clientConnection *model.ClientConnection, operation string) spanhelper.SpanHelper {
if clientConnection != nil && clientConnection.Span != nil {
span := opentracing.SpanFromContext(ctx)
if span != nil {
return spanhelper.FromContext(ctx, operation)
}
return spanhelper.CopySpan(ctx, clientConnection.Span, operation)
}
return spanhelper.FromContext(ctx, operation)
}