[WIP] - Add basic GraphQL tracing functionality

Author: onurtemizkan

packages/tracing/src/hubextensions.ts

@@ -237,6 +237,12 @@ function _autoloadDatabaseIntegrations(): void {
   }
 
   const packageToIntegrationMapping: Record<string, () => Integration> = {
+    graphql() {
+      const integration = dynamicRequire(module, './integrations/graphql') as {
+        GraphQL: IntegrationClass<Integration>;
+      };
+      return new integration.GraphQL();
+    },
     mongodb() {
       const integration = dynamicRequire(module, './integrations/node/mongo') as {
         Mongo: IntegrationClass<Integration>;

packages/tracing/src/integrations/graphql.ts

@@ -0,0 +1,60 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+/* eslint-disable no-console */
+/* eslint-disable no-debugger */
+import { Hub } from '@sentry/hub';
+import { EventProcessor, Integration } from '@sentry/types';
+import { fill, isThenable, loadModule, logger } from '@sentry/utils';
+
+/** Tracing integration for graphql package */
+export class GraphQL implements Integration {
+  /**
+   * @inheritDoc
+   */
+  public static id: string = 'GraphQL';
+
+  /**
+   * @inheritDoc
+   */
+  public name: string = GraphQL.id;
+
+  /**
+   * @inheritDoc
+   */
+  public setupOnce(_: (callback: EventProcessor) => void, getCurrentHub: () => Hub): void {
+    const pkg = loadModule<{
+      [method: string]: (...args: unknown[]) => unknown;
+    }>(`graphql/execution/execute.js`);
+
+    debugger;
+    if (!pkg) {
+      logger.error(`GraphQL Integration was unable to require @graphql/execution package.`);
+      return;
+    }
+
+    ['execute', 'defaultFieldResolver', 'defaultTypeResolver', 'buildExecutionContext'].forEach(method => {
+      fill(pkg, method, function(orig: () => void | Promise<unknown>) {
+        return function(this: unknown, ...args: unknown[]) {
+          const scope = getCurrentHub().getScope();
+          const parentSpan = scope?.getSpan();
+
+          const span = parentSpan?.startChild({
+            description: method,
+            op: 'graphql',
+          });
+
+          const rv = orig.call(this, ...args) as Promise<unknown>;
+
+          if (isThenable(rv)) {
+            return rv.then((res: unknown) => {
+              span?.finish();
+              return res;
+            });
+          } else {
+            span?.finish();
+            return rv;
+          }
+        };
+      });
+    });
+  }
+}

packages/tracing/src/integrations/index.ts

@@ -2,6 +2,7 @@ export { Express } from './node/express';
 export { Postgres } from './node/postgres';
 export { Mysql } from './node/mysql';
 export { Mongo } from './node/mongo';
+export { GraphQL } from './graphql';
 
 // TODO(v7): Remove this export
 // Please see `src/index.ts` for more details.