Writing Waiter Extensions
The Waiter provides a simple extensions framework in the form of:
-
A
WaiterExtension
class that you can extend to create your extensions -
A set of hooks that the Waiter calls at various points during the handling of a request
To implement an extension you create a class based on
WaiterExtension
that listens for one or more hooks, and
takes appropriate action when the hooks are called. The hooks are all
called in sequence at specified points during a request, and the Waiter
passes a hook object to the extension. The hook object is an array. Each
hook can add items of information to the hook object, so that the total
amount of information available increases as the request progresses. An
extension can also add information to the hook object, or modify existing
information in the object.
Waiter extensions must belong to the namespace
Extensions
.
In order to be found by the Waiter, an extension must be placed in your
CUE Front
installation's
service/waiter/waiter-extensions/Extensions
folder.