Please read Using events for usage.
Fired once when launching the server.
Fired once when shutting down the server.
Fired at each request before any dispatching/route matching.
True allows to shortcut everything and return the current
response object directly, see the options extension for
Fired at each request after all processing.
Fired in case of error, can be at each request. Use it to customize HTTP error formatting for instance.
If an unexpected error is raised during code execution, Roll will catch it and
return a 500 response. In this case,
error.__context__ is set to the original
error, so one can adapt the behaviour in the error chain management, including