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Discussion on: First Look at Lambda Powertools TypeScript

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drupsys profile image
DR • • Edited

Well... this solution was designed by someone who has never heard a word "Patterns", just spray syntactic sugar everywhere indiscriminately to solve all your problem.

Could have just used a decorator pattern, would have been backwards compatible with JavaScript, work with any kind of function, need no classes and actually be more compact than the code above...

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drupsys profile image
DR • • Edited

sorry, I'm a bit annoyed in case you can't tell, but seriously we couldn't just do something like this?

import { decorate, Tracer } from '@aws-lambda-powertools/tracer';
import type { Context } from 'aws-lambda';
import type { Payment } from '../models/payment';

const {
    captureLambdaHandler,
    superDuperSpecialStuff,
} = Tracer({ serviceName: 'paymentCollections' }); // This can't be a class anymore, because javascript...

const handler = async (
    input: { Payload: { Payment: Payment } },
    _context: Context,
): Promise<{ Status: number; Payment: Payment }> => {
    const min = 0;
    const max = 1;
    const Status = Math.floor(Math.random() * (max - min + 1)) + min;

    return { Status, Payment: input.Payload.Payment };
}

export default decorate(
    handler,
    captureLambdaHandler,
    superDuperSpecialStuff,
    // ...
);
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elthrasher profile image
Matt Morgan •

What you want is supported using middy. You can use class decorators, middy-style function "decorators", or inline imperative statements. Check the docs and you'll see each example has a "Middy Middleware" example.