LLRT Support

[willfarrell]

This issue is for tracking middy support with the experimental llrt.

• Run test(s) with llrt runtime
• feat: add in support for node: prefix for remaining packages awslabs/llrt#1111
  • node:stream (core,input-output-logger, http-content-encoding)
  • node:stream/web (core)
  • node:stream/promises (core)
  • node:zlib (http-content-encoding)]
• AbortController awslabs/llrt#248 (core)
• Implement native streams awslabs/llrt#178 (core)
• WHATWG Streams implementation awslabs/llrt#544 (core)
• TransformStream implementation awslabs/llrt#792 (core)
• Support Lambda response streaming awslabs/llrt#318 (core)

executionMode

• Standard
• StreamifyResponse
• DurableContext

cd llrt
npm run download:macos
npm test

Ref:

• https://github.com/awslabs/llrt
• https://www.linkedin.com/posts/theburningmonk_aws-careerdevelopment-activity-7167782882487312384-bPj2
• Feature request: Support LLRT (Low Latency Runtime) aws-powertools/powertools-lambda-typescript#2050

[nabetti1720]

At least in the current Commit 4dac6bb, there are no longer any errors when importing these modules.

// reproduction.js
import middy from "@middy/core"; console.log(middy);

import appconfigMiddleware from '@middy/appconfig'; console.log(appconfigMiddleware);
import doNotWaitForEmptyEventLoopMiddleware from '@middy/do-not-wait-for-empty-event-loop'; console.log(doNotWaitForEmptyEventLoopMiddleware);
import dynamodbMiddleware from '@middy/dynamodb'; console.log(dynamodbMiddleware);
import errorLoggerMiddleware from '@middy/error-logger'; console.log(errorLoggerMiddleware);
import eventNormalizerMiddleware from '@middy/event-normalizer'; console.log(eventNormalizerMiddleware);
import httpContentNegotiationMiddleware from '@middy/http-content-negotiation'; console.log(httpContentNegotiationMiddleware);
import httpCorsMiddleware from '@middy/http-cors'; console.log(httpCorsMiddleware);
import httpErrorHandlerMiddleware from '@middy/http-error-handler'; console.log(httpErrorHandlerMiddleware);
import httpEventNormalizerMiddleware from '@middy/http-event-normalizer'; console.log(httpEventNormalizerMiddleware);
import validator from '@middy/validator'; console.log(validator);

% llrt reproduction.js 
[function: middy]
[function: appConfigMiddleware]
[function: doNotWaitForEmptyEventLoopMiddleware]
[function: dynamodbMiddleware]
[function: errorLoggerMiddleware]
[function: eventNormalizerMiddleware]
[function: httpContentNegotiationMiddleware]
[function: httpCorsMiddleware]
[function: httpErrorHandlerMiddleware]
[function: httpEventNormalizerMiddleware]
[function: validatorMiddleware]

Unfortunately, I am not familiar with middy, so I would appreciate it if you could check whether it works on LLRT. You will probably find new issues when you run it.

[willfarrell]

Yeah, the recent merge of a PR I submitted (awslabs/llrt#1111) allows a lot of middy and most middlewares to work with LLRT assuming you're not using streams. I'm hoping to do some testing over the next few weeks. I've included a stream-less version above of @middy/core that you could test with.