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41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package internal // import "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/internal"
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import (
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"strings"
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"go.opentelemetry.io/otel/attribute"
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semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
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)
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// ParseFullMethod returns a span name following the OpenTelemetry semantic
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// conventions as well as all applicable span attribute.KeyValue attributes based
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// on a gRPC's FullMethod.
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//
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// Parsing is consistent with grpc-go implementation:
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// https://github.com/grpc/grpc-go/blob/v1.57.0/internal/grpcutil/method.go#L26-L39
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func ParseFullMethod(fullMethod string) (string, []attribute.KeyValue) {
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if !strings.HasPrefix(fullMethod, "/") {
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// Invalid format, does not follow `/package.service/method`.
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return fullMethod, nil
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}
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name := fullMethod[1:]
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pos := strings.LastIndex(name, "/")
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if pos < 0 {
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// Invalid format, does not follow `/package.service/method`.
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return name, nil
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}
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service, method := name[:pos], name[pos+1:]
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var attrs []attribute.KeyValue
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if service != "" {
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attrs = append(attrs, semconv.RPCService(service))
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}
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if method != "" {
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attrs = append(attrs, semconv.RPCMethod(method))
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}
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return name, attrs
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}
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