serverless.yml

service: async-extension-example
configValidationMode: error

provider:
  name: aws
  versionFunctions: false
  runtime: nodejs16.x
  logRetentionInDays: 3
  environment:
    STAGE: ${opt:stage, 'dev'}
  httpApi:
    payload: '2.0'
  iam:
    role:
      statements:
        - Effect: Allow
          Action:
            - lambda:InvokeFunction
          Resource: '*'

layers:
  asyncExtension:
    path: src/asyncExtension
    name: async-extension-${opt:stage, 'dev'}
    description: Layer that executes a handler in an async fashion.
    compatibleRuntimes:
      - nodejs16.x
    compatibleArchitectures:
      - x86_64
      - arm64

functions:
  longRunning:
    handler: /opt/proxy.handler
    timeout: 100
    environment:
      ASYNC_HANDLER: src/api/async/longRunning
    layers:
      - !Ref AsyncExtensionLambdaLayer
    events:
      - httpApi:
          path: /async/long
          method: GET

  customResponse:
    handler: /opt/proxy.handler
    timeout: 8
    environment:
      ASYNC_HANDLER: src/api/async/customResponse
      CUSTOM_RES: '{"message": "Hello from custom response"}'
    layers:
      - !Ref AsyncExtensionLambdaLayer
    events:
      - httpApi:
          path: /async/custom/res
          method: GET

  customHandler:
    handler: src/api/customHandler.handler
    timeout: 8
    environment:
      ASYNC_HANDLER: src/api/async/customHandler
    layers:
      - !Ref AsyncExtensionLambdaLayer
    events:
      - httpApi:
          path: /async/custom/handler
          method: GET