Updating project for strict concurrency and Swift 6

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:5.9
 import PackageDescription
 
 let package = Package(
@@ -31,17 +31,25 @@ let package = Package(
             dependencies: [
                 .target(name: "APNSCore"),
                 .target(name: "APNS"),
-            ]),
+            ]
+        ),
         .testTarget(
             name: "APNSTests",
             dependencies: [
                 .target(name: "APNSCore"),
                 .target(name: "APNS"),
-            ]),
+            ],
+            swiftSettings: [
+              .enableExperimentalFeature("StrictConcurrency")
+            ]
+        ),
         .target(
             name: "APNSCore",
             dependencies: [
                 .product(name: "Crypto", package: "swift-crypto"),
+            ],
+            swiftSettings: [
+              .enableExperimentalFeature("StrictConcurrency")
             ]
         ),
         .target(
@@ -50,6 +58,9 @@ let package = Package(
                 .product(name: "Crypto", package: "swift-crypto"),
                 .product(name: "AsyncHTTPClient", package: "async-http-client"),
                 .target(name: "APNSCore"),
+            ],
+            swiftSettings: [
+              .enableExperimentalFeature("StrictConcurrency")
             ]
         ),
         .target(
@@ -62,12 +73,18 @@ let package = Package(
                 .product(name: "NIOSSL", package: "swift-nio-ssl"),
                 .product(name: "NIOHTTP1", package: "swift-nio"),
                 .product(name: "NIOHTTP2", package: "swift-nio-http2"),
+            ],
+            swiftSettings: [
+              .enableExperimentalFeature("StrictConcurrency")
             ]
         ),
         .target(
             name: "APNSURLSession",
             dependencies: [
                 .target(name: "APNSCore"),
+            ],
+            swiftSettings: [
+              .enableExperimentalFeature("StrictConcurrency")
             ]
         ),
     ]

Sources/APNS/APNSClient.swift

@@ -125,14 +125,9 @@ public final class APNSClient<Decoder: APNSJSONDecoder, Encoder: APNSJSONEncoder
     /// - Parameters:
     ///   - queue: The queue on which the callback is invoked on.
     ///   - callback: The callback that is invoked when everything is shutdown.
-    @preconcurrency public func shutdown(queue: DispatchQueue = .global(), callback: @Sendable @escaping (Error?) -> Void) {
+    public func shutdown(queue: DispatchQueue = .global(), callback: @Sendable @escaping (Error?) -> Void) {
         self.httpClient.shutdown(callback)
     }
-
-    /// Shuts down the client and `EventLoopGroup` if it was created by the client.
-    public func syncShutdown() throws {
-        try self.httpClient.syncShutdown()
-    }
 }
 
 extension APNSClient: Sendable where Decoder: Sendable, Encoder: Sendable {}

Sources/APNSCore/APNSClient.swift

@@ -12,6 +12,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+import Dispatch
+
 public protocol APNSClientProtocol {
     func send(_ request: APNSRequest<some APNSMessage>) async throws -> APNSResponse
+    func shutdown(queue: DispatchQueue, callback: @Sendable @escaping (Error?) -> Void)
 }

Sources/APNSExample/Program.swift

@@ -14,6 +14,7 @@
 
 import APNSCore
 import APNS
+import OSLog
 import Foundation
 
 @available(macOS 11.0, *)
@@ -30,6 +31,7 @@ struct Main {
     static let teamIdentifier = ""
 
     static func main() async throws {
+        let logger = Logger(subsystem: "apns", category: "apns-main")
         let client = APNSClient(
             configuration: .init(
                 authenticationMethod: .jwt(
@@ -43,15 +45,24 @@ struct Main {
             responseDecoder: JSONDecoder(),
             requestEncoder: JSONEncoder()
         )
-
-        try await Self.sendSimpleAlert(with: client)
-        try await Self.sendLocalizedAlert(with: client)
-        try await Self.sendThreadedAlert(with: client)
-        try await Self.sendCustomCategoryAlert(with: client)
-        try await Self.sendMutableContentAlert(with: client)
-        try await Self.sendBackground(with: client)
-        try await Self.sendVoIP(with: client)
-        try await Self.sendFileProvider(with: client)
+        do {
+            try await Self.sendSimpleAlert(with: client)
+            try await Self.sendLocalizedAlert(with: client)
+            try await Self.sendThreadedAlert(with: client)
+            try await Self.sendCustomCategoryAlert(with: client)
+            try await Self.sendMutableContentAlert(with: client)
+            try await Self.sendBackground(with: client)
+            try await Self.sendVoIP(with: client)
+            try await Self.sendFileProvider(with: client)
+        } catch {
+            logger.warning("error sending push:\(error)")
+        }
+
+        client.shutdown { error in
+            if let error = error {
+                logger.warning("error shutting down client: \(error.localizedDescription)")
+            }
+        }
     }
 }