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Add support for Lambda Managed Instances without changing the public API [Convenience + Example] (#623)

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This PR builds on
https://github.com/awslabs/swift-aws-lambda-runtime/pull/629 to add
convenience structs (Handlers and Adapters) that are `Sendable`

**Changes**

- **Added Sendable adapter types**: Implemented `ClosureHandlerSendable`
- a thread-safe version of existing closure handler that enforces
`Sendable` conformance for concurrent execution environments - and added
conditional conformance to `Sendable` for other Adapters when the
Handler is `Sendable`

- **Enhanced handler protocols for concurrency**: Extended handler
protocols to support `Sendable` constraints and concurrent response
writing through `LambdaResponseStreamWriter & Sendable`, enabling safe
multi-threaded invocation processing

- **Created comprehensive Lambda Managed Instances examples**: Built
three demonstration functions showcasing concurrent execution
capabilities, streaming responses, and background processing patterns
specific to the new managed instances deployment model

**Context**
Lambda Managed Instances support multi-concurrent invocations where
multiple invocations execute simultaneously within the same execution
environment. The runtime now detects the configured concurrency level
and launches the appropriate number of RICs to handle concurrent
requests efficiently.

When `AWS_LAMBDA_MAX_CONCURRENCY` is 1 or unset, the runtime maintains
the existing single-threaded behaviour for optimal performance on
traditional Lambda deployments.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Sebastien Stormacq <stormacq@amazon.lu>
This commit is contained in:
Sébastien Stormacq
2026-02-12 00:32:31 +01:00
committed by GitHub
parent d456396581
commit 190eb81876
15 changed files with 675 additions and 36 deletions
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.github/workflows/pull_request.yml
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@@ -40,7 +40,7 @@ jobs:
# We pass the list of examples here, but we can't pass an array as argument
# Instead, we pass a String with a valid JSON array.
# The workaround is mentioned here https://github.com/orgs/community/discussions/11692
examples: "[ 'APIGatewayV1', 'APIGatewayV2', 'APIGatewayV2+LambdaAuthorizer', 'BackgroundTasks', 'HelloJSON', 'HelloWorld', 'HelloWorldNoTraits', 'HummingbirdLambda', 'MultiSourceAPI', 'MultiTenant', 'ResourcesPackaging', 'S3EventNotifier', 'S3_AWSSDK', 'S3_Soto', 'Streaming+APIGateway', 'Streaming+FunctionUrl', 'Streaming+Codable', 'ServiceLifecycle+Postgres', 'Testing', 'Tutorial' ]"
examples: "[ 'APIGatewayV1', 'APIGatewayV2', 'APIGatewayV2+LambdaAuthorizer', 'BackgroundTasks', 'HelloJSON', 'HelloWorld', 'HelloWorldNoTraits', 'HummingbirdLambda', 'ManagedInstances', 'MultiSourceAPI', 'MultiTenant', 'ResourcesPackaging', 'S3EventNotifier', 'S3_AWSSDK', 'S3_Soto', 'Streaming+APIGateway', 'Streaming+FunctionUrl', 'Streaming+Codable', 'ServiceLifecycle+Postgres', 'Testing', 'Tutorial' ]"
archive_plugin_examples: "[ 'HelloWorld', 'ResourcesPackaging' ]"
archive_plugin_enabled: true