Switch to new vapor main

Package.swift

@@ -13,21 +13,15 @@ let package = Package(
         .package(url: "https://github.com/christophhagen/ClairvoyantBinaryCodable", from: "0.3.0"),
     ],
     targets: [
-        .target(name: "App",
+        .executableTarget(
+            name: "App",
             dependencies: [
                 .product(name: "Vapor", package: "vapor"),
                 .product(name: "Clairvoyant", package: "Clairvoyant"),
                 .product(name: "ClairvoyantVapor", package: "ClairvoyantVapor"),
                 .product(name: "ClairvoyantBinaryCodable", package: "ClairvoyantBinaryCodable"),
-                ],
-                swiftSettings: [
-                    // Enable better optimizations when building in Release configuration. Despite the use of
-                    // the `.unsafeFlags` construct required by SwiftPM, this flag is recommended for Release
-                    // builds. See <https://github.com/swift-server/guides#building-for-production> for details.
-                    .unsafeFlags(["-cross-module-optimization"], .when(configuration: .release))
-                ]),
-        .executableTarget(name: "Run", dependencies: ["App"]),
-        .testTarget(name: "AppTests", dependencies: ["App"]),
+            ]
+        )
     ]
 )
 

Sources/App/EventLoopScheduler.swift

@@ -3,32 +3,9 @@ import Clairvoyant
 import Vapor
 import NIOCore
 
-final class EventLoopScheduler {
+extension MultiThreadedEventLoopGroup: AsyncScheduler {
 
-    private let backgroundGroup: EventLoopGroup
-
-    init(numberOfThreads: Int = 2) {
-        backgroundGroup = MultiThreadedEventLoopGroup(numberOfThreads: numberOfThreads)
-    }
-
-    func next() -> EventLoop {
-        backgroundGroup.next()
-    }
-
-    func provider() -> NIOEventLoopGroupProvider {
-        return .shared(backgroundGroup)
-    }
-
-    func shutdown() {
-        backgroundGroup.shutdownGracefully { _ in
-
-        }
-    }
-}
-
-extension EventLoopScheduler: AsyncScheduler {
-
-    func schedule(asyncJob: @escaping @Sendable () async throws -> Void) {
-        _ = backgroundGroup.any().makeFutureWithTask(asyncJob)
+    public func schedule(asyncJob: @escaping @Sendable () async throws -> Void) {
+        _ = any().makeFutureWithTask(asyncJob)
     }
 }

Sources/App/configure.swift

@@ -7,17 +7,11 @@ import ClairvoyantBinaryCodable
 private var provider: VaporMetricProvider!
 private var serverStatus: Metric<ServerStatus>!
 
-private let asyncScheduler = EventLoopScheduler()
+private let asyncScheduler = MultiThreadedEventLoopGroup(numberOfThreads: 2)
 
 private var server: CapServer!
 
-private func status(_ newStatus: ServerStatus) {
-    asyncScheduler.schedule {
-        try await serverStatus.update(newStatus)
-    }
-}
-
-public func configure(_ app: Application) throws {
+func configure(_ app: Application) async throws {
 
     let resourceDirectory = URL(fileURLWithPath: app.directory.resourcesDirectory)
     let publicDirectory = app.directory.publicDirectory
@@ -32,7 +26,7 @@ public func configure(_ app: Application) throws {
     serverStatus = Metric<ServerStatus>("caps.status",
                                       name: "Status",
                                       description: "The general status of the service")
-    status(.initializing)
+    try await serverStatus.update(.initializing)
 
     app.http.server.configuration.port = config.port
     app.routes.defaultMaxBodySize = .init(stringLiteral: config.maxBodySize)
@@ -55,18 +49,29 @@ public func configure(_ app: Application) throws {
     do {
         try server.loadData()
     } catch {
-        status(.initializationFailure)
+        try await serverStatus.update(.initializationFailure)
         print("[\(df.string(from: Date()))] Server failed to start: \(error)")
         return
     }
     if server.canResizeImages {
-        status(.nominal)
+        try await serverStatus.update(.nominal)
     } else {
-        status(.reducedFunctionality)
+        try await serverStatus.update(.reducedFunctionality)
     }
     print("[\(df.string(from: Date()))] Server started (\(server.capCount) caps)")
 }
 
+func shutdown() {
+    print("[\(df.string(from: Date()))] Server shutdown")
+    asyncScheduler.schedule {
+        do {
+            try await asyncScheduler.shutdownGracefully()
+        } catch {
+            print("Failed to shut down MultiThreadedEventLoopGroup: \(error)")
+        }
+    }
+}
+
 func log(_ message: String) {
     guard let observer = MetricObserver.standard else {
         print(message)

Sources/App/entrypoint.swift

@@ -0,0 +1,43 @@
+import Vapor
+import Dispatch
+import Logging
+
+/// This extension is temporary and can be removed once Vapor gets this support.
+private extension Vapor.Application {
+    static let baseExecutionQueue = DispatchQueue(label: "vapor.codes.entrypoint")
+    
+    func runFromAsyncMainEntrypoint() async throws {
+        try await withCheckedThrowingContinuation { continuation in
+            Vapor.Application.baseExecutionQueue.async { [self] in
+                do {
+                    try self.run()
+                    continuation.resume()
+                } catch {
+                    continuation.resume(throwing: error)
+                }
+            }
+        }
+    }
+}
+
+@main
+enum Entrypoint {
+    static func main() async throws {
+        var env = try Environment.detect()
+        try LoggingSystem.bootstrap(from: &env)
+        
+        let app = Application(env)
+        defer {
+            shutdown()
+            app.shutdown()
+        }
+        
+        do {
+            try await configure(app)
+        } catch {
+            app.logger.report(error: error)
+            throw error
+        }
+        try await app.runFromAsyncMainEntrypoint()
+    }
+}

Sources/Run/main.swift

@@ -1,9 +0,0 @@
-import App
-import Vapor
-
-var env = Environment.production
-try LoggingSystem.bootstrap(from: &env)
-let app = Application(env)
-defer { app.shutdown() }
-try configure(app)
-try app.run()

Tests/AppTests/AppTests.swift

@@ -1,13 +0,0 @@
-import App
-import Dispatch
-import XCTest
-
-final class AppTests : XCTestCase {
-    func testNothing() throws {
-        XCTAssert(true)
-    }
-
-    static let allTests = [
-        ("testNothing", testNothing),
-    ]
-}