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Improvements with tracking

Describes changes made to tracking to improve features and performance in Optimizely Customized Commerce.

Previously, client browser calls to the Product Recommendation service directly with data were created on the server side, and the cuid/sessionid were included in the data. This created two problems when the rendered page got cached:

  • The wrong tracking data was sent to Product Recommendations (formerly Perform). The call repeated what was rendered the first time, even though the page might have been served to a different user from cache.
  • After the first time, no tracking was sent to Profile Store since that happens on the server, which was not hit when the page was cached.

The client-side API was rewritten to be more full-featured, like the server side APIs: creating different types of tracking requests and populating them with data. Instead of calling to Recommendation directly, JS APIs call to Proxy. The Proxy is an asynchronous webapi controller that handles tracking request from Js APIs and forwards requests to the Product Recommendation service.

You can use JS Tracking APIs and Server Tracking APIs in parallel. On the client side, you can use JS TrackingDataFactory to create tracking data and epiRecommendations to send tracking requests to the Proxy. On the server side, you can use Tracking APIs, or TrackingAttribute for short.

Changes to support the rewriting of the Client APIs


TrackingMode has been obsoleted. As mentioned above, Js Tracking APIs and Server tracking APIs are independent and work in parallel.


epiRecommendations now support setting scope when sending tracking data.

track(trackingData, scope, onSuccess, callbackOptions)

JavaScript TrackingDataFactory

The TrackingDataFactory class creates JavaScript tracking data, which is sent to the Proxy. The following methods are available to create TrackingData.

Create Home tracking datarackingDataFactory.createHomeTrackingData()
Create Product tracking dataTrackingDataFactory.createProductTrackingData(productCode)
Create SearchResult tracking dataTrackingDataFactory.createSearchResultTrackingData(term, productCodes)
Create Checkout tracking dataTrackingDataFactory.createCheckoutTrackingData()
Create Basket tracking dataTrackingDataFactory.createBasketTrackingData()
Create Order tracking dataTrackingDataFactory.createOrderTrackingData(orderId)
Create Brand tracking dataTrackingDataFactory.createBrandTrackingData(brandName)
Create Category tracking dataTrackingDataFactory.createCategoryTrackingData(categoryCode)
Create Attribute tracking dataTrackingDataFactory.createAttributeTrackingData(attributeName, attributeValue)
Create Wishlist tracking dataTrackingDataFactory.createWishlistTrackingData()

The proxy

The Proxy has only one endpoint to handle tracking requests sent from the client.

  • Endpoint url: episerverapi/commercetracking/track
  • Method: POST

Handling recommendationId

In server-side mode, Optimizely uses cookies for handles. In client-side mode, Optimizely uses QueryString to handle RecommendationId.

  • When clicking a product from a Recommendation, Optimizely passes the RecommendationId to the QueryString.
  • When viewing a product, TrackingDataFactory gets RecommendationId from QueryString (if any), and sends the tracking request to the Proxy.