Update hitcounter handler to use SDK V3, lambda to use Node 18 runtime

[scanlonp]

General Information

• I may be able to implement this feature request
• This feature might incur a breaking change

Description

Node 18 is the recommended runtime version for lambda functions running on Node. Changing the runtime requires the handler functions to use SDKv3.

Proposed Solution

Update the code and runtime.

CDK CLI Version

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Other information

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[estanqueiroa]

facing this error message related to nodejs12.x version:

dkWorkshopStack: creating CloudFormation changeset...
7:21:52 PM | CREATE_FAILED | AWS::Lambda::Function | ViewHitCounterRendered9C783E45
Resource handler returned message: "The runtime parameter of nodejs12.x is no longer supported for creating or updating AWS Lambda functions. We recommend you use the new runtime (nodejs18.x) while creating or u
pdating functions. (Service: Lambda, Status Code: 400, Request ID: 612a17a9-c43a-4eae-addb-15345e953a90)" (RequestToken: 56c410cf-a9ec-de2d-bae1-51cffc6b446f, HandlerErrorCode: InvalidRequest)

step: https://cdkworkshop.com/30-python/50-table-viewer/500-deploy.html

[kami619]

When I am using the Node 20 runtime, I am forced to make updates to the aws-sdk to use V3 version and the way dynamodb and lamdba are defined in the hitcounter.js file is very different. This is hampering the progress of what I could because of the limited JS knowledge I have and defeats the purpose of the workshop when the content is outdated. @estanqueiroa thanks for raising this issue in the first place.

Issue I am hitting in the HitCounter api with the newer node run-time

2024-01-04T16:16:39.901Z	undefined	ERROR	Uncaught Exception 	
{
    "errorType": "Runtime.ImportModuleError",
    "errorMessage": "Error: Cannot find module 'aws-sdk'\nRequire stack:\n- /var/task/hitcounter.js\n- /var/runtime/index.mjs",
    "stack": [
        "Runtime.ImportModuleError: Error: Cannot find module 'aws-sdk'",
        "Require stack:",
        "- /var/task/hitcounter.js",
        "- /var/runtime/index.mjs",
        "    at _loadUserApp (file:///var/runtime/index.mjs:1087:17)",
        "    at async UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1119:21)",
        "    at async start (file:///var/runtime/index.mjs:1282:23)",
        "    at async file:///var/runtime/index.mjs:1288:1"
    ]
}

[ashishdhingra]

@scanlonp Thanks for raising the issue. Feel free to contribute PR to use Node.js 18.x runtime.

@kami619 Node.js 20.x doesn't come with bundled AWS JS SDK v3, hence extra steps might be required.