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| 1 | +import LambdaRuntime |
| 2 | +import NIO |
| 3 | +import Logging |
| 4 | +import Foundation |
| 5 | + |
| 6 | +LoggingSystem.bootstrap(StreamLogHandler.standardError) |
| 7 | + |
| 8 | + |
| 9 | +let group = MultiThreadedEventLoopGroup(numberOfThreads: 1) |
| 10 | +defer { try! group.syncShutdownGracefully() } |
| 11 | +let logger = Logger(label: "AWSLambda.EventSources") |
| 12 | + |
| 13 | +func handleSNS(event: SNS.Event, ctx: Context) -> EventLoopFuture<Void> { |
| 14 | + ctx.logger.info("Payload: \(String(describing: event))") |
| 15 | + |
| 16 | + return ctx.eventLoop.makeSucceededFuture(Void()) |
| 17 | +} |
| 18 | + |
| 19 | +func handleSQS(event: SQS.Event, ctx: Context) -> EventLoopFuture<Void> { |
| 20 | + ctx.logger.info("Payload: \(String(describing: event))") |
| 21 | + |
| 22 | + return ctx.eventLoop.makeSucceededFuture(Void()) |
| 23 | +} |
| 24 | + |
| 25 | +func handleDynamoStream(event: DynamoDB.Event, ctx: Context) -> EventLoopFuture<Void> { |
| 26 | + ctx.logger.info("Payload: \(String(describing: event))") |
| 27 | + |
| 28 | + return ctx.eventLoop.makeSucceededFuture(Void()) |
| 29 | +} |
| 30 | + |
| 31 | +func handleCloudwatchSchedule(event: Cloudwatch.Event<Cloudwatch.ScheduledEvent>, ctx: Context) |
| 32 | + -> EventLoopFuture<Void> |
| 33 | +{ |
| 34 | + ctx.logger.info("Payload: \(String(describing: event))") |
| 35 | + |
| 36 | + return ctx.eventLoop.makeSucceededFuture(Void()) |
| 37 | +} |
| 38 | + |
| 39 | +func handleAPIRequest(req: APIGateway.Request, ctx: Context) -> EventLoopFuture<APIGateway.Response> { |
| 40 | + ctx.logger.info("Payload: \(String(describing: req))") |
| 41 | + |
| 42 | + struct Payload: Encodable { |
| 43 | + let path: String |
| 44 | + let method: String |
| 45 | + } |
| 46 | + |
| 47 | + let payload = Payload(path: req.path, method: req.httpMethod.rawValue) |
| 48 | + let response = try! APIGateway.Response(statusCode: .ok, payload: payload) |
| 49 | + |
| 50 | + return ctx.eventLoop.makeSucceededFuture(response) |
| 51 | +} |
| 52 | + |
| 53 | +func handleLoadBalancerRequest(req: ALB.TargetGroupRequest, ctx: Context) -> |
| 54 | + EventLoopFuture<ALB.TargetGroupResponse> |
| 55 | +{ |
| 56 | + ctx.logger.info("Payload: \(String(describing: req))") |
| 57 | + |
| 58 | + struct Payload: Encodable { |
| 59 | + let path: String |
| 60 | + let method: String |
| 61 | + } |
| 62 | + |
| 63 | + let payload = Payload(path: req.path, method: req.httpMethod.rawValue) |
| 64 | + let response = try! ALB.TargetGroupResponse(statusCode: .ok, payload: payload) |
| 65 | + |
| 66 | + return ctx.eventLoop.makeSucceededFuture(response) |
| 67 | +} |
| 68 | + |
| 69 | +func printPayload(buffer: NIO.ByteBuffer, ctx: Context) -> EventLoopFuture<ByteBuffer?> { |
| 70 | + let payload = buffer.getString(at: 0, length: buffer.readableBytes) |
| 71 | + ctx.logger.error("Payload: \(String(describing: payload))") |
| 72 | + |
| 73 | + return ctx.eventLoop.makeSucceededFuture(nil) |
| 74 | +} |
| 75 | + |
| 76 | +func printOriginalPayload(_ handler: @escaping (NIO.ByteBuffer, Context) -> EventLoopFuture<ByteBuffer?>) |
| 77 | + -> ((NIO.ByteBuffer, Context) -> EventLoopFuture<ByteBuffer?>) |
| 78 | +{ |
| 79 | + return { (buffer, ctx) in |
| 80 | + let payload = buffer.getString(at: 0, length: buffer.readableBytes) |
| 81 | + ctx.logger.info("Payload: \(String(describing: payload))") |
| 82 | + |
| 83 | + return handler(buffer, ctx) |
| 84 | + } |
| 85 | +} |
| 86 | + |
| 87 | +do { |
| 88 | + logger.info("start runtime") |
| 89 | + let environment = try Environment() |
| 90 | + let handler: LambdaRuntime.Handler |
| 91 | + |
| 92 | + switch environment.handlerName { |
| 93 | + case "sns": |
| 94 | + handler = printOriginalPayload(LambdaRuntime.codable(handleSNS)) |
| 95 | + case "sqs": |
| 96 | + handler = printOriginalPayload(LambdaRuntime.codable(handleSQS)) |
| 97 | + case "dynamo": |
| 98 | + handler = printOriginalPayload(LambdaRuntime.codable(handleDynamoStream)) |
| 99 | + case "schedule": |
| 100 | + handler = printOriginalPayload(LambdaRuntime.codable(handleCloudwatchSchedule)) |
| 101 | + case "api": |
| 102 | + handler = printOriginalPayload(APIGateway.handler(handleAPIRequest)) |
| 103 | + case "loadbalancer": |
| 104 | + handler = printOriginalPayload(ALB.handler(multiValueHeadersEnabled: true, handleLoadBalancerRequest)) |
| 105 | + default: |
| 106 | + handler = printPayload |
| 107 | + } |
| 108 | + |
| 109 | + let runtime = try LambdaRuntime.createRuntime(eventLoopGroup: group, handler: handler) |
| 110 | + defer { try! runtime.syncShutdown() } |
| 111 | + logger.info("starting runloop") |
| 112 | + |
| 113 | + try runtime.start().wait() |
| 114 | +} |
| 115 | +catch { |
| 116 | + logger.error("error: \(String(describing: error))") |
| 117 | +} |
| 118 | + |
| 119 | + |
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