Add asyncInitialization option to Service decorator

Author: Julien Heller

src/decorators/service.decorator.ts

@@ -173,13 +173,15 @@ export function Service<T, K extends keyof T>(
         service.multiple = (optionsOrServiceName as ServiceOptions<T, K>).multiple;
         service.global = (optionsOrServiceName as ServiceOptions<T, K>).global || false;
         service.transient = (optionsOrServiceName as ServiceOptions<T, K>).transient;
+        service.asyncInitialization = (optionsOrServiceName as ServiceOptions<T, K>).asyncInitialization;
       } else if (optionsOrServiceName) {
         // ServiceOptions
         service.id = (optionsOrServiceName as ServiceOptions<T, K>).id;
         service.factory = (optionsOrServiceName as ServiceOptions<T, K>).factory;
         service.multiple = (optionsOrServiceName as ServiceOptions<T, K>).multiple;
         service.global = (optionsOrServiceName as ServiceOptions<T, K>).global || false;
         service.transient = (optionsOrServiceName as ServiceOptions<T, K>).transient;
+        service.asyncInitialization = (optionsOrServiceName as ServiceOptions<T, K>).asyncInitialization;
       }
 
       Container.set(service);

src/interfaces/service-metadata.interface..ts

@@ -40,6 +40,11 @@ export interface ServiceMetadata<T, K extends keyof T> {
    */
   factory?: [Constructable<T>, K] | ((...params: any[]) => any);
 
+  /**
+   * Will call instance's #initialize method and resolve the promise it returns when getting with Container.getAsync() and Container.getManyAsync().
+   */
+  asyncInitialization?: boolean;
+
   /**
    * Instance of the target class.
    */

src/interfaces/service-options.interface.ts

@@ -31,4 +31,9 @@ export interface ServiceOptions<T, K extends keyof T> {
    * Factory used to produce this service.
    */
   factory?: [Constructable<T>, K] | ((...params: any[]) => any);
+
+  /**
+   * Will call instance's #initialize method and resolve the promise it returns when getting with Container.getAsync() and Container.getManyAsync().
+   */
+  asyncInitialization?: boolean;
 }