Updating project for strict concurrency and Swift 6

.github/workflows/swift.yml

@@ -4,22 +4,22 @@ on:
 jobs:
   focal:
     container:
-      image: swift:5.7-focal
+      image: swiftlang/swift:nightly-6.0-focal
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - run: swift test --enable-test-discovery
+    - run: swift test
   thread:
     container:
-      image: swift:5.7-focal
+      image: swiftlang/swift:nightly-6.0-focal
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - run: swift test --enable-test-discovery  --sanitize=thread
+    - run: swift test --sanitize=thread
   address:
     container:
-      image: swift:5.7-focal
+      image: swiftlang/swift:nightly-6.0-focal
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - run: ASAN_OPTIONS=detect_leaks=0 swift test --enable-test-discovery --sanitize=address
+    - run: ASAN_OPTIONS=detect_leaks=0 swift test --sanitize=address

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:6.0
 import PackageDescription
 
 let package = Package(
@@ -31,13 +31,16 @@ let package = Package(
             dependencies: [
                 .target(name: "APNSCore"),
                 .target(name: "APNS"),
-            ]),
+                .product(name: "Logging", package: "swift-log"),
+            ]
+        ),
         .testTarget(
             name: "APNSTests",
             dependencies: [
                 .target(name: "APNSCore"),
                 .target(name: "APNS"),
-            ]),
+            ]
+        ),
         .target(
             name: "APNSCore",
             dependencies: [
@@ -70,5 +73,6 @@ let package = Package(
                 .target(name: "APNSCore"),
             ]
         ),
-    ]
+    ],
+    swiftLanguageVersions: [.v6]
 )

Sources/APNS/APNSClient.swift

@@ -14,7 +14,6 @@
 
 import APNSCore
 import AsyncHTTPClient
-import Dispatch
 import struct Foundation.Date
 import struct Foundation.UUID
 import NIOConcurrencyHelpers
@@ -114,24 +113,9 @@ public final class APNSClient<Decoder: APNSJSONDecoder, Encoder: APNSJSONEncoder
         }
     }
 
-    /// Shuts down the client and event loop gracefully. This function is clearly an outlier in that it uses a completion
-    /// callback instead of an EventLoopFuture. The reason for that is that NIO's EventLoopFutures will call back on an event loop.
-    /// The virtue of this function is to shut the event loop down. To work around that we call back on a DispatchQueue
-    /// instead.
-    ///
-    /// - Important: This will only shutdown the event loop if the provider passed to the client was ``createNew``.
-    /// For shared event loops the owner of the event loop is responsible for handling the lifecycle.
-    ///
-    /// - 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) {
-        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()
+    /// Shuts down the client and event loop gracefully.
+    public func shutdown() async throws {
+        try await self.httpClient.shutdown()
     }
 }
 

Sources/APNSCore/APNSClient.swift

@@ -14,4 +14,5 @@
 
 public protocol APNSClientProtocol {
     func send(_ request: APNSRequest<some APNSMessage>) async throws -> APNSResponse
+    func shutdown() async throws
 }

Sources/APNSExample/Program.swift

@@ -14,8 +14,11 @@
 
 import APNSCore
 import APNS
+import Logging
 import Foundation
 
+let logger = Logger(label: "APNSwiftExample")
+
 @available(macOS 11.0, *)
 @main
 struct Main {
@@ -30,7 +33,10 @@ struct Main {
     static let keyIdentifier = ""
     static let teamIdentifier = ""
 
+    private static let logger = Logger(label: "APNSwiftExample")
+
     static func main() async throws {
+
         let client = APNSClient(
             configuration: .init(
                 authenticationMethod: .jwt(
@@ -45,15 +51,21 @@ struct Main {
             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)
-        try await Self.sendPushToTalk(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)
+            try await Self.sendPushToTalk(with: client)
+        } catch {
+            logger.warning("error sending push: \(error)")
+        }
+
+        try? await client.shutdown()
     }
 }
 
@@ -77,6 +89,7 @@ extension Main {
             ),
             deviceToken: self.deviceToken
         )
+        logger.info("successfully sent simple alert notification")
     }
 
     static func sendLocalizedAlert(with client: some APNSClientProtocol) async throws {
@@ -95,6 +108,7 @@ extension Main {
             ),
             deviceToken: self.deviceToken
         )
+        logger.info("successfully sent alert localized notification")
     }
 
     static func sendThreadedAlert(with client: some APNSClientProtocol) async throws {
@@ -114,6 +128,7 @@ extension Main {
             ),
             deviceToken: self.deviceToken
         )
+        logger.info("successfully sent threaded alert")
     }
 
     static func sendCustomCategoryAlert(with client: some APNSClientProtocol) async throws {
@@ -133,6 +148,7 @@ extension Main {
             ),
             deviceToken: self.deviceToken
         )
+        logger.info("successfully sent custom category alert")
     }
 
     static func sendMutableContentAlert(with client: some APNSClientProtocol) async throws {
@@ -152,6 +168,7 @@ extension Main {
             ),
             deviceToken: self.deviceToken
         )
+        logger.info("successfully sent mutable content alert")
     }
 }
 
@@ -168,6 +185,7 @@ extension Main {
             ),
             deviceToken: self.deviceToken
         )
+        logger.info("successfully sent background notification")
     }
 }
 
@@ -185,6 +203,7 @@ extension Main {
             ),
             deviceToken: self.pushKitDeviceToken
         )
+        logger.info("successfully sent VoIP notification")
     }
 }
 
@@ -201,6 +220,7 @@ extension Main {
             ),
             deviceToken: self.fileProviderDeviceToken
         )
+        logger.info("successfully sent FileProvider notification")
     }
 }
 
@@ -219,5 +239,6 @@ extension Main {
             ),
             deviceToken: self.ephemeralPushToken
         )
+        logger.info("successfully sent Push to Talk notification")
     }
 }

Sources/APNSURLSession/APNSUrlSessionClient.swift

@@ -7,6 +7,7 @@ enum APNSUrlSessionClientError: Error {
 }
 
 public struct APNSURLSessionClient: APNSClientProtocol {
+
     private let configuration: APNSURLSessionClientConfiguration
 
     let encoder = JSONEncoder()
@@ -61,6 +62,10 @@ public struct APNSURLSessionClient: APNSClientProtocol {
             return APNSResponse(apnsID: apnsID, apnsUniqueID: apnsUniqueID)
         }
     }
+
+    public func shutdown() async throws {
+        // no op
+    }
 }
 
 #endif

Tests/APNSTests/APNSClientTests.swift

@@ -18,9 +18,9 @@ import Crypto
 import XCTest
 
 final class APNSClientTests: XCTestCase {
-    func testShutdown() throws {
+    func testShutdown() async throws {
         let client = self.makeClient()
-        try client.syncShutdown()
+        try await client.shutdown()
     }
 
     // MARK: - Helper methods