pandora-hub/src/object-proxying/ConsumerManager.ts

pandora.js messenge hub

import {HubClient} from '../hub/HubClient';
import {ObjectConsumer} from './ObjectConsumer';
import {ConsumerExtInfo, ObjectDescription} from '../domain';
import {DefaultObjectProxy} from './DefaultObjectProxy';
import {ProviderManager} from './ProviderManager';

export class ConsumerManager {

  protected hubClient: HubClient;
  private consumerCache: Map<string, ObjectConsumer>;
  private providerManager: ProviderManager;

  constructor (hubClient, providerManager: ProviderManager) {
    this.hubClient = hubClient;
    this.consumerCache = new Map;
    this.providerManager = providerManager;
  }

  /**
   * Get a Consumer by an ObjectDescription
   * @param {ObjectDescription} objectDescription
   * @param {ConsumerExtInfo} extInfo
   * @return {ObjectConsumer}
   */
  public getConsumer (objectDescription: ObjectDescription, extInfo?: ConsumerExtInfo): ObjectConsumer {
    const key = objectDescription.name + ':' + objectDescription.tag;
    if(!this.consumerCache.has(key)) {
      const consumer = new ObjectConsumer(objectDescription, this.hubClient, this.providerManager, extInfo);
      this.consumerCache.set(key, consumer);
      return consumer;
    }
    return this.consumerCache.get(key);
  }

  /**
   * get an Object Proxy by an ObjectDescription
   * @param {ObjectDescription} objectDescription
   * @param {ConsumerExtInfo} extInfo
   * @return {Promise<T & DefaultObjectProxy>}
   */
  public async getProxy <T extends any> (objectDescription: ObjectDescription, extInfo?: ConsumerExtInfo): Promise<T & DefaultObjectProxy> {
    return this.getConsumer(objectDescription, extInfo).getProxy<T>();
  }

}