Function defineKeyHandler

defineKeyHandler(
    key: string,
    module: unknown,
    options?: { action?: string; isClass?: boolean; isFactory?: boolean },
): KeyHandlerMeta
Build a handler meta-module for imperative registration.
Parameters
- key: string
  The routing key.
- module: unknown
  The handler function, instance, class or factory.
- options: { action?: string; isClass?: boolean; isFactory?: boolean } = {}
  Whether it is a class/factory and which action method to call.
Returns KeyHandlerMeta
A handler meta-module.
Example
```
defineKeyHandler('send-email', SendEmail, { isClass: true })
defineKeyHandler('ping', () => 'pong')
```