Implementing MultipleInstanceManager in Laravel

While building phonable I wanted to support multiple services like Prelude and Vonage simultaneously - to match how we used those services on Roomies. To do this I used the default Manager class that comes with Laravel. It provides a similar interface to abstractions Laravel provides around caching systems databases and mail services.

One frustrating limitation of this Manager implementation is that by default it restricts you to a single instance of any connection. Without extending it in your own code you are limited to a single Prelude/Vonage/Twilio instance. I shipped and adopted the package internally anyway as it wasn't a showstopper but it is something I wanted to address.

The Solution: MultipleInstanceManager

Newton Job pointed out on X that Laravel has a MultipleInstanceManager class. This class provides everything I needed to allow for multiple instances of drivers.

I implemented the required changes in a relatively simple PR.

Key Aspects of MultipleInstanceManager

Some interesting aspects of MultipleInstanceManager addressed in the PR include:

1. Managing the default instance name and allowing it to be changed at runtime.
2. Implementing getInstanceConfig to return the appropriate configuration for a given instance name. The driver key determines which method to call.
3. Manually binding the manager. MultipleInstanceManager requires an application instance though it isn't type-hinted.

$this->app->bind(
    abstract: 'phone-verification',
    concrete: fn ($app) => new Verification\Manager($app),
);

Moving to MultipleInstanceManager required no breaking changes. It's a great base to take your manager implementation to the next level if you require it.