What is the equivalent of request_processors in Magento 2

Question

Anyone know where the equivalent of request_processors is in Magento 2? In Magento 1 this was used in EE being defined in app/etc/enterprise.xml - it was the starting point for loading FPC content.

Answer 1

The answer is that there doesn't appear to an equivalent in Magento 2, the built in FPC instead uses plugins to intercept the request and this happens at a much later point in the request cycle. Unfortunately there doesn't appear to be anything nearly as early as request_processors, but I would imagine that was a deliberate choice by the core team due to the difficulties in accessing the system and data before the framework has been initialised.