Blogpost: Monitor your GraphQL Apollo Server in Google Cloud

apollo2.js

// ...
const server = new ApolloServer({
  typeDefs,
  resolvers,
  introspection: true,
  playground: true,
  formatError: (error) => {

    /*
     * Database connection error should appear in logs
     * but not in Error Report as this is not considered a bug
     */
    if (error.originalError instanceof DatabaseError) {
      console.error('Database error occurred', error);
      return error;
    }

    /*
     * Some other Apollo error like wrong user input
     * we don't need to log or report this,
     * but still return the error back to the client
     */
    if (error.originalError instanceof ApolloError) {
      return error;
    }

    /*
     * Something unexpected is wrong
     */
    errorReporting.report(error.originalError.stack); // report to Google Error Report
    console.error(error); // log the error
    return {message: 'Internal Server Error'} // do not reveal error details to the client

  }
});
const app = express();
server.applyMiddleware({app, path: '/graphql'});
// ...