Tracing GraphQL resolvers with X-Ray

x-ray-graphql.ts

import traceResolvers from '@lifeomic/graphql-resolvers-xray-tracing';

// Apply tracing middleware if running Lambda environment
if (process.env.AWS_LAMBDA_FUNCTION_NAME) {
  traceResolvers(schema);
}

const apolloServer = new ApolloServer({
  schema,
  context: contextFn,
  introspection: true,
  // https://github.com/apollographql/apollo-server/issues/1433#issuecomment-497074497
  formatError,
});

const apolloHandler = apolloServer.createHandler({
  cors: {
    origin: '*',
    credentials: true,
  },
});

export const handler = async (event: APIGatewayProxyEvent, context: Context) => {
  AWSXRay.captureHTTPsGlobal(require('https'), true);
  AWSXRay.capturePromise();

  return await new Promise((resolve, reject) => {
    const callback: APIGatewayProxyCallback = (error, body) => (error ? reject(error) : resolve(body));
    apolloHandler(event, context, callback);
  })
}