Method _createResource

lib/Pool.js:317–340

* @private

()

   * @private
   */
  _createResource() {
    // An attempt to create a resource
    const factoryPromise = this._factory.create();
    const wrappedFactoryPromise = this._Promise
      .resolve(factoryPromise)
      .then(resource => {
        const pooledResource = new PooledResource(resource);
        this._allObjects.add(pooledResource);
        this._addPooledResourceToAvailableObjects(pooledResource);
      });

    this._trackOperation(wrappedFactoryPromise, this._factoryCreateOperations)
      .then(() => {
        this._dispense();
        // Stop bluebird complaining about this side-effect only handler
        // - a promise was created in a handler but was not returned from it
        // https://goo.gl/rRqMUw
        return null;
      })
      .catch(reason => {
        this.emit(FACTORY_CREATE_ERROR, reason);
        this._dispense();
      });
  }

  /**
   * @private