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Migration from AWS Lambda to other AWS compute services, such as Amazon ECS, presents challenges due to tight integration with AWS Lambda's APIs, often referred to as service lock-in. Tools like [https://github.com/awslabs/aws-lambda-web-adapter AWS Lambda Web Adapter] offer a pathway for [[Software portability|portability]] by enabling developers to build web applications using familiar frameworks under the "Lambdalith" or monolithic Lambda design pattern. <ref>{{Cite web |title=AWS Lambda Web Adapter |url=https://github.com/awslabs/aws-lambda-web-adapter |url-status=live |archive-url=https://web.archive.org/web/20241128211006/https://github.com/awslabs/aws-lambda-web-adapter |archive-date=2024-11-28 |access-date=2024-11-29}}</ref><ref>{{Cite web |title=The Lambda monolith |url=https://docs.aws.amazon.com/lambda/latest/dg/monolith.html |url-status=live |archive-url=https://web.archive.org/web/20241126020340/https://docs.aws.amazon.com/lambda/latest/dg/monolith.html |archive-date=2024-11-26 |access-date=2024-11-29}}</ref> However, this approach introduces limitations, including coarser-grained alerting and access controls, potential cold start delays with large dependencies, and limited suitability for non-HTTP APIs.
Adopting architectural patterns such as [[Hexagonal architecture (software)|hexagonal architecture]] can mitigate these challenges by abstracting dependencies and facilitating compatibility across compute platforms. <ref name=":1" /> By separating the core business logic from infrastructure-specific code, this approach supports both HTTP and non-HTTP APIs, offering a more portable foundation for serverless workloads.
== Testing ==
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