mirror of
https://github.com/swift-server/swift-aws-lambda-runtime.git
synced 2026-06-02 07:27:33 +00:00
Tobias
25eb6e16de
We want that the runtime only depends on `FoundationEssentials` where available (ie. on linux) to ensure small binary size. ### Motivation: Smaller binary size is good for lambda deployment and cold-start times. The runtime should only depend on `FoundationEssentials`. ### Modifications: - replace `import Foundation` with `import FoundationEssentials` if `FoundationEssentials` is available. - I also applied the same treatment to tests to ensure that catch error where tests run on linux and we use API that is only available in `Foundation` which easily happens when you develop on macOS (where always full `Foundation` is available). ### Result: This should allow builds without linking full `Foundation`.
58 lines
1.9 KiB
Swift
58 lines
1.9 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the SwiftAWSLambdaRuntime open source project
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//
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// Copyright (c) 2024 Apple Inc. and the SwiftAWSLambdaRuntime project authors
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// Licensed under Apache License v2.0
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//
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// See LICENSE.txt for license information
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// See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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//===----------------------------------------------------------------------===//
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import AWSLambdaRuntime
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#if canImport(FoundationEssentials)
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import FoundationEssentials
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#else
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import Foundation
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#endif
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struct BackgroundProcessingHandler: LambdaWithBackgroundProcessingHandler {
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struct Input: Decodable {
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let message: String
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}
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struct Greeting: Encodable {
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let echoedMessage: String
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}
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typealias Event = Input
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typealias Output = Greeting
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func handle(
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_ event: Event,
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outputWriter: some LambdaResponseWriter<Output>,
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context: LambdaContext
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) async throws {
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// Return result to the Lambda control plane
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context.logger.debug("BackgroundProcessingHandler - message received")
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try await outputWriter.write(Greeting(echoedMessage: event.message))
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// Perform some background work, e.g:
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context.logger.debug("BackgroundProcessingHandler - response sent. Performing background tasks.")
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try await Task.sleep(for: .seconds(10))
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// Exit the function. All asynchronous work has been executed before exiting the scope of this function.
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// Follows structured concurrency principles.
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context.logger.debug("BackgroundProcessingHandler - Background tasks completed. Returning")
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return
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}
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}
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let adapter = LambdaCodableAdapter(handler: BackgroundProcessingHandler())
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let runtime = LambdaRuntime.init(handler: adapter)
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try await runtime.run()
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