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add fast path to startSpan().

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This commit is contained in:
jonny rhea 2025-12-29 14:47:56 -06:00
parent d4ba577b03
commit ecf30d940c
1 changed files with 11 additions and 5 deletions
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16
rpc/handler.go
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@ -526,7 +526,7 @@ func (h *handler) handleCall(cp *callProc, msg *jsonrpcMessage) *jsonrpcMessage
}
// Start tracing span before invoking the method.
ctx, span := h.startRPCSpan(cp.ctx, msg, cp.isBatch)
ctx, span := h.startSpan(cp.ctx, msg, cp.isBatch)
defer span.End()
start := time.Now()
@ -586,7 +586,7 @@ func (h *handler) handleSubscribe(cp *callProc, msg *jsonrpcMessage) *jsonrpcMes
args = args[1:]
// Start tracing span before invoking the subscription method.
ctx, span := h.startRPCSpan(cp.ctx, msg, cp.isBatch)
ctx, span := h.startSpan(cp.ctx, msg, cp.isBatch)
defer span.End()
// Install notifier in context so the subscription handler can find it.
@ -606,15 +606,21 @@ func (h *handler) handleSubscribe(cp *callProc, msg *jsonrpcMessage) *jsonrpcMes
return answer
}
// startRPCSpan starts a tracing span for an RPC call.
func (h *handler) startRPCSpan(ctx context.Context, msg *jsonrpcMessage, isBatch bool) (context.Context, trace.Span) {
// startSpan starts a tracing span for an RPC call.
func (h *handler) startSpan(ctx context.Context, msg *jsonrpcMessage, isBatch bool) (context.Context, trace.Span) {
ctx, span := h.tracer().Start(ctx, "rpc.call")
// Fast path: noop provider or span not sampled
if !span.IsRecording() {
return ctx, span
}
// Set span attributes.
span.SetAttributes(
semconv.RPCSystemKey.String("jsonrpc"),
semconv.RPCMethodKey.String(msg.Method),
attribute.Bool("rpc.batch", isBatch),
)
// Request id
id := strings.TrimSpace(string(msg.ID))
if id != "" && id != "null" {
span.SetAttributes(attribute.String("rpc.id", id))