lifecycle.md

Lifecycle events

In order to accomplish some of the application flow features required by @digital-alchemy, additional lifecycle events are required. This are implemented before / after the existing NestJS lifecycle events. When possible, it is recommended to use the standard nest lifecycle events.

onRewire(app, bootstrapOptions)

This event is intended for providers that want to significantly change the way the application runs. They should either do nothing at all for a given call, or result in a process.exit() call at the end.

Example use cases: --help (TTY) & --scan-config (Boilerplate) switches

onPreInit(app, express, bootstrapOptions)

Gain access to the nest application from inside the provider prior to the app.init() call. Most useful in attaching execution order dependant middleware to Nest, but may have other uses.

init()

Standard NestJS lifecycle events

• onModuleInit
• onApplicationBootstrap

onPostInit(app, express, bootstrapOptions)

Nest has finished it's own init cycle, and released control back. Perform any work like attaching webserver listeners here.