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Lambda code examples for the SDK for Swift

swift/example_code/lambda/README.md

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Lambda code examples for the SDK for Swift

Overview

Shows how to use the AWS SDK for Swift to work with AWS Lambda.

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Lambda allows you to run code without provisioning or managing servers.

⚠ Important

  • Running this code might result in charges to your AWS account. For more details, see AWS Pricing and Free Tier.
  • Running the tests might result in charges to your AWS account.
  • We recommend that you grant your code least privilege. At most, grant only the minimum permissions required to perform the task. For more information, see Grant least privilege.
  • This code is not tested in every AWS Region. For more information, see AWS Regional Services.
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Code examples

Prerequisites

For prerequisites, see the README in the swift folder.

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Basics

Code examples that show you how to perform the essential operations within a service.

Single actions

Code excerpts that show you how to call individual service functions.

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Run the examples

Instructions

To build any of these examples from a terminal window, navigate into its directory, then use the following command:

$ swift build

To build one of these examples in Xcode, navigate to the example's directory (such as the ListUsers directory, to build that example). Then type xed. to open the example directory in Xcode. You can then use standard Xcode build and run commands.

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Learn the basics

This example shows you how to do the following:

  • Create an IAM role and Lambda function, then upload handler code.
  • Invoke the function with a single parameter and get results.
  • Update the function code and configure with an environment variable.
  • Invoke the function with new parameters and get results. Display the returned execution log.
  • List the functions for your account, then clean up resources.
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Build and deploy the example

This example consists of the main program and two AWS Lambda functions. To build and deploy it:

  1. Build the increment lambda function (cd increment && swift build).
  2. Archive the increment lambda function for use as a Lambda function: swift package archive --allow-network-connections docker. When archiving is complete, the archive's path is displayed. Take note of it.
  3. Build the calculator lambda function (cd ../calculator && swift build).
  4. Archive it for use as a Lambda function: swift package archive --allow-network-connections docker. Take note of this created Zip file's path, too.
  5. Build the main program in the lambda-basics directory.
  6. Run the main program with the command swift run lambda-basics --incpath <path-of-increment-archive> --calcpath <path-of-calculator-archive>.
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Tests

⚠ Running tests might result in charges to your AWS account.

To find instructions for running these tests, see the README in the swift folder.

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Additional resources

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SPDX-License-Identifier: Apache-2.0