Async Method Execution in Symfony, this is a simple POC

Purpose

This project demonstrates how to execute service methods asynchronously in a Symfony application by simply marking them with a custom attribute #[Async].

Strategy

1. A PHP attribute #[Async] is added to service methods that should run asynchronously.
2. A custom compiler pass scans all services during container compilation.
3. For each service with an #[Async] method, the compiler pass generates a proxy class in var/cache/async_proxies/ that implements the service interface.
4. The proxy intercepts calls to #[Async] methods and delegates them to a background process via the AsyncRunner service.
5. The AsyncRunner triggers a console command (go:boost) in a separate process using exec() to perform the actual execution of the method.

How to Test

1. Add the #[Async] attribute to a service method (like in ArticleCreator), for example:

   #[Async]
   public function create(string $title): void

2. Run the Symfony console command:

   symfony console app:create-article "Test Article"

3. The command should finish immediately while the actual operation runs in the background.

4. Check var/log/article_async.log to confirm that the method was executed asynchronously after the command completed.

PS: for now we need the service to implement an interface (classname."Interface") for the proxy generation to work.

Expected Result

• The command returns quickly.
• The background process completes after a short delay.
• The log file shows the asynchronous operation execution.