adjustments to sendable

motivation: events may be used in an async context and as such musct conform to Sendable

changes:
* define common abstraction for Sendable & Codable
* conform all events Sendable

Author: tomerd

Sources/AWSLambdaEvents/ALB.swift

@@ -16,9 +16,9 @@ import class Foundation.JSONEncoder
 
 // https://github.com/aws/aws-lambda-go/blob/master/events/alb.go
 /// ALBTargetGroupRequest contains data originating from the ALB Lambda target group integration
-public struct ALBTargetGroupRequest: Codable {
+public struct ALBTargetGroupRequest: AWSLambdaEvent {
     /// ALBTargetGroupRequestContext contains the information to identify the load balancer invoking the lambda
-    public struct Context: Codable {
+    public struct Context: AWSLambdaEvent {
         public let elb: ELBContext
     }
 
@@ -44,12 +44,12 @@ public struct ALBTargetGroupRequest: Codable {
     public let body: String?
 
     /// ELBContext contains the information to identify the ARN invoking the lambda
-    public struct ELBContext: Codable {
+    public struct ELBContext: AWSLambdaEvent {
         public let targetGroupArn: String
     }
 }
 
-public struct ALBTargetGroupResponse: Codable {
+public struct ALBTargetGroupResponse: AWSLambdaEvent {
     public var statusCode: HTTPResponseStatus
     public var statusDescription: String?
     public var headers: HTTPHeaders?

Sources/AWSLambdaEvents/APIGateway+V2.swift

@@ -13,10 +13,10 @@
 //===----------------------------------------------------------------------===//
 
 /// APIGatewayV2Request contains data coming from the new HTTP API Gateway
-public struct APIGatewayV2Request: Codable {
+public struct APIGatewayV2Request: AWSLambdaEvent {
     /// Context contains the information to identify the AWS account and resources invoking the Lambda function.
-    public struct Context: Codable {
-        public struct HTTP: Codable {
+    public struct Context: AWSLambdaEvent {
+        public struct HTTP: AWSLambdaEvent {
             public let method: HTTPMethod
             public let path: String
             public let `protocol`: String
@@ -25,9 +25,9 @@ public struct APIGatewayV2Request: Codable {
         }
 
         /// Authorizer contains authorizer information for the request context.
-        public struct Authorizer: Codable {
+        public struct Authorizer: AWSLambdaEvent {
             /// JWT contains JWT authorizer information for the request context.
-            public struct JWT: Codable {
+            public struct JWT: AWSLambdaEvent {
                 public let claims: [String: String]?
                 public let scopes: [String]?
             }

Sources/AWSLambdaEvents/APIGateway.swift

@@ -18,9 +18,9 @@ import class Foundation.JSONEncoder
 // https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html
 
 /// APIGatewayRequest contains data coming from the API Gateway
-public struct APIGatewayRequest: Codable {
-    public struct Context: Codable {
-        public struct Identity: Codable {
+public struct APIGatewayRequest: AWSLambdaEvent {
+    public struct Context: AWSLambdaEvent {
+        public struct Identity: AWSLambdaEvent {
             public let cognitoIdentityPoolId: String?
 
             public let apiKey: String?

Sources/AWSLambdaEvents/AWSLambdaEvent.swift

@@ -0,0 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftAWSLambdaRuntime open source project
+//
+// Copyright (c) 2022 Apple Inc. and the SwiftAWSLambdaRuntime project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+public protocol AWSLambdaEvent: Decodable, _AWSLambdaEventsSendable {}

Sources/AWSLambdaEvents/AWSRegion.swift

@@ -16,7 +16,7 @@
 //   $ aws ssm get-parameters-by-path --path /aws/service/global-infrastructure/services/lambda/regions --output json
 
 /// Enumeration of the AWS Regions.
-public struct AWSRegion: RawRepresentable, Equatable {
+public struct AWSRegion: RawRepresentable, Equatable, _AWSLambdaEventsSendable {
     public typealias RawValue = String
 
     public let rawValue: String

Sources/AWSLambdaEvents/AppSync.swift

@@ -13,10 +13,10 @@
 //===----------------------------------------------------------------------===//
 
 // https://docs.aws.amazon.com/appsync/latest/devguide/resolver-context-reference.html
-public struct AppSyncEvent: Decodable {
+public struct AppSyncEvent: AWSLambdaEvent {
     public let arguments: [String: ArgumentValue]
 
-    public enum ArgumentValue: Codable {
+    public enum ArgumentValue: AWSLambdaEvent {
         case string(String)
         case dictionary([String: String])
 
@@ -46,15 +46,15 @@ public struct AppSyncEvent: Decodable {
     }
 
     public let request: Request
-    public struct Request: Decodable {
+    public struct Request: AWSLambdaEvent {
         let headers: HTTPHeaders
     }
 
     public let source: [String: String]?
     public let stash: [String: String]?
 
     public let info: Info
-    public struct Info: Codable {
+    public struct Info: AWSLambdaEvent {
         public var selectionSetList: [String]
         public var selectionSetGraphQL: String
         public var parentTypeName: String
@@ -63,11 +63,11 @@ public struct AppSyncEvent: Decodable {
     }
 
     public let identity: Identity?
-    public enum Identity: Codable {
+    public enum Identity: AWSLambdaEvent {
         case iam(IAMIdentity)
         case cognitoUserPools(CognitoUserPoolIdentity)
 
-        public struct IAMIdentity: Codable {
+        public struct IAMIdentity: AWSLambdaEvent {
             public let accountId: String
             public let cognitoIdentityPoolId: String
             public let cognitoIdentityId: String
@@ -78,7 +78,7 @@ public struct AppSyncEvent: Decodable {
             public let cognitoIdentityAuthProvider: String
         }
 
-        public struct CognitoUserPoolIdentity: Codable {
+        public struct CognitoUserPoolIdentity: AWSLambdaEvent {
             public let defaultAuthStrategy: String
             public let issuer: String
             public let sourceIp: [String]
@@ -131,16 +131,6 @@ public struct AppSyncEvent: Decodable {
                 """)
             }
         }
-
-        public func encode(to encoder: Encoder) throws {
-            var container = encoder.singleValueContainer()
-            switch self {
-            case .iam(let iamIdentity):
-                try container.encode(iamIdentity)
-            case .cognitoUserPools(let cognitoUserPool):
-                try container.encode(cognitoUserPool)
-            }
-        }
     }
 }
 

Sources/AWSLambdaEvents/Cloudwatch.swift

@@ -12,12 +12,16 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if compiler(>=5.6)
+@preconcurrency import struct Foundation.Date
+#else
 import struct Foundation.Date
+#endif
 
 /// EventBridge has the same events/notification types as CloudWatch
 typealias EventBridgeEvent = CloudwatchEvent
 
-public protocol CloudwatchDetail: Decodable {
+public protocol CloudwatchDetail: AWSLambdaEvent {
     static var name: String { get }
 }
 
@@ -33,7 +37,7 @@ extension CloudwatchDetail {
 /// https://docs.aws.amazon.com/lambda/latest/dg/services-cloudwatchevents.html
 /// https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/EventTypes.html
 /// https://docs.aws.amazon.com/eventbridge/latest/userguide/event-types.html
-public struct CloudwatchEvent<Detail: CloudwatchDetail>: Decodable {
+public struct CloudwatchEvent<Detail: CloudwatchDetail>: AWSLambdaEvent {
     public let id: String
     public let source: String
     public let accountId: String
@@ -89,7 +93,7 @@ public enum CloudwatchDetails {
         public struct InstanceStateChangeNotification: CloudwatchDetail {
             public static let name = "EC2 Instance State-change Notification"
 
-            public enum State: String, Codable {
+            public enum State: String, AWSLambdaEvent {
                 case running
                 case shuttingDown = "shutting-down"
                 case stopped
@@ -109,7 +113,7 @@ public enum CloudwatchDetails {
         public struct SpotInstanceInterruptionNotice: CloudwatchDetail {
             public static let name = "EC2 Spot Instance Interruption Warning"
 
-            public enum Action: String, Codable {
+            public enum Action: String, AWSLambdaEvent {
                 case hibernate
                 case stop
                 case terminate

Sources/AWSLambdaEvents/DynamoDB.swift

@@ -12,28 +12,32 @@
 //
 //===----------------------------------------------------------------------===//
 
+#if compiler(>=5.6)
+@preconcurrency import struct Foundation.Date
+#else
 import struct Foundation.Date
+#endif
 
 // https://docs.aws.amazon.com/lambda/latest/dg/with-ddb.html
-public struct DynamoDBEvent: Decodable {
+public struct DynamoDBEvent: AWSLambdaEvent {
     public let records: [EventRecord]
 
     public enum CodingKeys: String, CodingKey {
         case records = "Records"
     }
 
-    public enum KeyType: String, Codable {
+    public enum KeyType: String, AWSLambdaEvent {
         case hash = "HASH"
         case range = "RANGE"
     }
 
-    public enum OperationType: String, Codable {
+    public enum OperationType: String, AWSLambdaEvent {
         case insert = "INSERT"
         case modify = "MODIFY"
         case remove = "REMOVE"
     }
 
-    public enum SharedIteratorType: String, Codable {
+    public enum SharedIteratorType: String, AWSLambdaEvent {
         case trimHorizon = "TRIM_HORIZON"
         case latest = "LATEST"
         case atSequenceNumber = "AT_SEQUENCE_NUMBER"
@@ -47,7 +51,7 @@ public struct DynamoDBEvent: Decodable {
         case disabled = "DISABLED"
     }
 
-    public enum StreamViewType: String, Codable {
+    public enum StreamViewType: String, AWSLambdaEvent {
         /// the entire item, as it appeared after it was modified.
         case newImage = "NEW_IMAGE"
         /// the entire item, as it appeared before it was modified.
@@ -58,7 +62,7 @@ public struct DynamoDBEvent: Decodable {
         case keysOnly = "KEYS_ONLY"
     }
 
-    public struct EventRecord: Decodable {
+    public struct EventRecord: AWSLambdaEvent {
         /// The region in which the GetRecords request was received.
         public let awsRegion: AWSRegion
 
@@ -113,7 +117,7 @@ public struct DynamoDBEvent: Decodable {
         }
     }
 
-    public struct StreamRecord {
+    public struct StreamRecord: AWSLambdaEvent {
         /// The approximate date and time when the stream record was created, in UNIX
         /// epoch time (http://www.epochconverter.com/) format.
         public let approximateCreationDateTime: Date?
@@ -138,7 +142,7 @@ public struct DynamoDBEvent: Decodable {
         public let streamViewType: StreamViewType
     }
 
-    public struct UserIdentity: Codable {
+    public struct UserIdentity: AWSLambdaEvent {
         public let type: String
         public let principalId: String
     }
@@ -187,7 +191,7 @@ extension DynamoDBEvent.StreamRecord: Decodable {
 // MARK: - AttributeValue -
 
 extension DynamoDBEvent {
-    public enum AttributeValue {
+    public enum AttributeValue: AWSLambdaEvent {
         case boolean(Bool)
         case binary([UInt8])
         case binarySet([[UInt8]])

Sources/AWSLambdaEvents/S3.swift

@@ -16,8 +16,8 @@ import struct Foundation.Date
 
 // https://docs.aws.amazon.com/lambda/latest/dg/with-s3.html
 
-public struct S3Event: Decodable {
-    public struct Record: Decodable {
+public struct S3Event: AWSLambdaEvent {
+    public struct Record: AWSLambdaEvent {
         public let eventVersion: String
         public let eventSource: String
         public let awsRegion: AWSRegion
@@ -37,15 +37,15 @@ public struct S3Event: Decodable {
         case records = "Records"
     }
 
-    public struct RequestParameters: Codable, Equatable {
+    public struct RequestParameters: AWSLambdaEvent, Equatable {
         public let sourceIPAddress: String
     }
 
-    public struct UserIdentity: Codable, Equatable {
+    public struct UserIdentity: AWSLambdaEvent, Equatable {
         public let principalId: String
     }
 
-    public struct Entity: Codable {
+    public struct Entity: AWSLambdaEvent {
         public let configurationId: String
         public let schemaVersion: String
         public let bucket: Bucket
@@ -59,13 +59,13 @@ public struct S3Event: Decodable {
         }
     }
 
-    public struct Bucket: Codable {
+    public struct Bucket: AWSLambdaEvent {
         public let name: String
         public let ownerIdentity: UserIdentity
         public let arn: String
     }
 
-    public struct Object: Codable {
+    public struct Object: AWSLambdaEvent {
         public let key: String
         /// The object's size in bytes.
         ///