RequestFactory theory: Why is Locator<>.find() being called so often?

Question

I\'m new to RequestFactory but with generous help of Thomas Broyer and after reviewing documents below it\'s getting much better :)

• Getting Started with Reques

Answer 1

The pairs of getId and find at the end are the default implementation of Locator#isLive: it assumes an object is live (i.e. still exists in the data store) if finding it by its ID returns a non-null value.

RF checks each EntityProxy it ever seen during the request/response for their liveness when constructing the response, to tell the client when an entity has been deleted (on the client side, it'd then fire an EntityProxyChange event with a DELETE write operation.

You can of course override isLive in your Locator with a more optimized implementation if you can provide one.