add sentry span code

Author: AbhiPrasad

packages/opentelemetry-node/src/index.ts

@@ -1,24 +1,84 @@
 import { Context } from '@opentelemetry/api';
 import { Span as OtelSpan, SpanProcessor as OtelSpanProcessor } from '@opentelemetry/sdk-trace-base';
 import { getCurrentHub } from '@sentry/core';
+import { Span as SentrySpan } from '@sentry/types';
 
 /**
  * Converts OpenTelemetry Spans to Sentry Spans and sends them to Sentry via
  * the Sentry SDK.
  */
 export class SentrySpanProcessor implements OtelSpanProcessor {
+  private readonly _map: Record<SentrySpan['spanId'], [SentrySpan, SentrySpan | undefined]> = {};
+
   /**
    * @inheritDoc
    */
-  public onStart(span: OtelSpan, parentContext: Context): void {
-    // do something
+  public onStart(otelSpan: OtelSpan, _parentContext: Context): void {
+    const hub = getCurrentHub();
+    if (!hub) {
+      return;
+    }
+    const scope = hub.getScope();
+    if (!scope) {
+      return;
+    }
+
+    // if isSentryRequest(otelSpan) return;
+
+    const otelSpanId = otelSpan.spanContext().spanId;
+
+    const sentryParentSpan = scope.getSpan();
+    if (sentryParentSpan) {
+      const sentryChildSpan = sentryParentSpan.startChild({
+        description: otelSpan.name,
+        // instrumentor: 'otel',
+        startTimestamp: otelSpan.startTime[0],
+      });
+      sentryChildSpan.spanId = otelSpanId;
+
+      this._map[otelSpanId] = [sentryChildSpan, sentryParentSpan];
+      scope.setSpan(sentryChildSpan);
+    } else {
+      // const traceCtx = getTraceData(otelSpan);
+      const transaction = hub.startTransaction({
+        name: otelSpan.name,
+        // ...traceCtx,
+        // instrumentor: 'otel',
+        startTimestamp: otelSpan.startTime[0],
+      });
+      transaction.spanId = otelSpanId;
+
+      this._map[otelSpanId] = [transaction, undefined];
+      scope.setSpan(transaction);
+    }
   }
 
   /**
    * @inheritDoc
    */
-  public onEnd(span: OtelSpan): void {
-    // do something
+  public onEnd(otelSpan: OtelSpan): void {
+    const hub = getCurrentHub();
+    if (!hub) {
+      return;
+    }
+    const scope = hub.getScope();
+    if (!scope) {
+      return;
+    }
+
+    const otelSpanId = otelSpan.spanContext().spanId;
+    const mapVal = this._map[otelSpanId];
+
+    if (mapVal) {
+      const [sentrySpan, sentryParentSpan] = mapVal;
+
+      // updateSpanWithOtelData(sentrySpan, otelSpan);
+
+      sentrySpan.finish(otelSpan.endTime[0]);
+      scope.setSpan(sentryParentSpan);
+      // eslint-disable-next-line @typescript-eslint/no-dynamic-delete
+      delete this._map[otelSpanId];
+    }
   }
 
   /**