Async/Await

[Peter Shaw]

Feature Request

We use Prom a lot in Vapor projects. In the contoller we have to handle the future:

    func index(_ req: Request) throws -> EventLoopFuture<String> {
        let promise = req.eventLoop.makePromise(of: String.self)
        try MetricsSystem.prometheus().collect(into: promise)
        return promise.futureResult
    }

This feature request change the usage to

    func index(_ req: Request) async throws -> String {
        return try await MetricsSystem.prometheus().collect()
    }

Motivation Behind Feature

Vapor itself will turn to fully async/await. It would be nice to habe SwiftPrometheus async/await, too.

Feature Description

Support Async/Await

Alternatives or Workarounds

We could write an extension to wrap it into a/a.

[Konrad `ktoso` Malawski]

Sounds good, feel free to send in a PR implementing this :-)