Caps-Server/Sources/App/configure.swift

import Vapor
import Foundation
import Clairvoyant
import ClairvoyantVapor
import ClairvoyantBinaryCodable

private var provider: VaporMetricProvider!

private let asyncScheduler = EventLoopScheduler()

public func configure(_ app: Application) async throws {

    let resourceDirectory = URL(fileURLWithPath: app.directory.resourcesDirectory)
    let publicDirectory = app.directory.publicDirectory

    let config = Config(loadFrom: resourceDirectory)
    let authenticator = Authenticator(writers: config.writers)

    let monitor = MetricObserver(logFileFolder: config.logURL, logMetricId: "caps.log")
    MetricObserver.standard = monitor

    let status = Metric<ServerStatus>("caps.status",
                                      name: "Status",
                                      description: "The general status of the service")
    try await status.update(.initializing)

    app.http.server.configuration.port = config.port
    app.routes.defaultMaxBodySize = .init(stringLiteral: config.maxBodySize)

    let server = CapServer(in: URL(fileURLWithPath: publicDirectory))

    provider = .init(observer: monitor, accessManager: config.writers)
    provider.asyncScheduler = asyncScheduler
    provider.registerRoutes(app)

    if config.serveFiles {
        let middleware = FileMiddleware(publicDirectory: publicDirectory)
        app.middleware.use(middleware)
    }

    // Register routes to the router
    server.registerRoutes(with: app, authenticator: authenticator)

    // Initialize the server data
    do {
        try server.loadData()
    } catch {
        try await status.update(.initializationFailure)
    }
    try await status.update(.nominal)
}

func log(_ message: String) {
    guard let observer = MetricObserver.standard else {
        print(message)
        return
    }
    asyncScheduler.schedule {
        await observer.log(message)
    }
}