event-listeners.md

Event listeners

There are two events that are triggered during the execution of the function:

1. A validation listener
2. A response listener

Validation listener

Using the validationListener method, you can add functions that take the event as a parameter and return nothing TEvent => Unit. These functions can be used to perform validations before the function is called.

Response listener

Using the responseListener method, you can add functions that take a response as a parameter and return a response object TResponse => TResponse . These functions can be used to modify the response before it is written to the OutputStream.

Exception listener

Using the exceptionListener method, you can add functions that take a Throwable as a parameter and returns nothing. These functions can be used to report on exceptions, metrics, and more.