withAppEngineServices function

Future withAppEngineServices(Future callback())

Runs callback inside a new service scope with appengine services added.

The services available to callback are all non-request specific appengine services e.g. dbService.

See package:gcloud/service_scope.dart for more information on service scopes.

Here is an example on how this can be used:

import 'dart:async';
import 'dart:io';
import 'package:appengine/appengine.dart';

Future backgroundWork() {
  return dbService.query(Person).run().toList().then((persons) {
    // Do something with `persons`.
  });
}

void mainHandler(HttpRequest request) {
  dbService.query(Greeting).run().toList().then((greetings) {
    request.response
        ..write('Number of greetings: ${greetings.length}')
        ..close();
  });
}

main() {
  withAppEngineServices(() {
    return Future.wait([
       runAppEngine(mainHandler),
       backgroundWork(),
    ]);
  });
}

Implementation

Future withAppEngineServices(Future callback()) {
  return appengine_internal.withAppEngineServices(callback);
}