Method component

packages/core/src/application.ts:462–486

* Add a component to this application and register extensions such as * controllers, providers, and servers from the component. * * @param componentCtor - The component class to add. * @param nameOrOptions - Optional component name or options, default to the * class name * * @ex

(
    componentCtor: Constructor<T>,
    nameOrOptions?: string | BindingFromClassOptions,
  )

   * ```
   */
  public component<T extends Component = Component>(
    componentCtor: Constructor<T>,
    nameOrOptions?: string | BindingFromClassOptions,
  ) {
    this.debug('Adding component: %s', nameOrOptions ?? componentCtor.name);
    const binding = createBindingFromClass(componentCtor, {
      namespace: CoreBindings.COMPONENTS,
      type: CoreTags.COMPONENT,
      defaultScope: BindingScope.SINGLETON,
      ...toOptions(nameOrOptions),
    });
    // Check if the component is already bound
    const found = this.registry.get(binding.key);
    if (found?.valueConstructor === binding.valueConstructor) {
      return binding;
    }
    if (isLifeCycleObserverClass(componentCtor)) {
      binding.apply(asLifeCycleObserver);
    }
    this.add(binding);
    // Assuming components can be synchronously instantiated
    const instance = this.getSync<Component>(binding.key);
    mountComponent(this, instance);
    return binding;
  }

  /**
   * Set application metadata. `@loopback/boot` calls this method to populate