Function greetFromAll

examples/context/src/value-promise.ts:88–116

* Invoke all greeters to print out greetings in all supported langauges * @param greetersView - A context view representing all greeters

(greetersView: ContextView<Greeter>)

 * @param greetersView - A context view representing all greeters
 */
async function greetFromAll(greetersView: ContextView<Greeter>) {
  // Get all greeter instances
  const greeters = await greetersView.values();

  // Collect greetings as an array from all greeters
  const greetings = resolveList(greeters, greeter => {
    return greeter.greet('John');
  });

  // Check if the result is a Promise (async) or value (sync)
  if (isPromiseLike(greetings)) {
    console.log('async:', await greetings);
  } else {
    console.log('sync:', greetings);
  }

  // Collect greetings as a map keyed by language from al greeters
  const greeterMap: {
    [language: string]: Greeter;
  } = {};
  greeters.filter(greeter => (greeterMap[greeter.language] = greeter));

  const greetingsByLanguage = resolveMap(greeterMap, greeter =>
    greeter.greet('Jane'),
  );

  // Print out all map entries
  await transformValueOrPromise(greetingsByLanguage, console.log);
}

if (require.main === module) {
  main().catch(err => {