This Lamware Middleware utilizes the official Lambda TypeScript Powertools provided by AWS to:

• Set-up and memoize a root Metrics instance
• Publish Metrics automatically after the Function handler executes
• Optionally set-up default dimensions
• Automatically capture various metrics:
  • Cold starts
  • Function name

Installation

This package is available via NPM:

yarn add @lamware/powertools-metrics

# or

npm install @lamware/powertools-metrics

Usage

import { powertoolsMetrics } from '@lamware/powertools-metrics';
import { MetricUnits } from '@aws-lambda-powertools/metrics';
import type { APIGatewayProxyHandlerV2 } from 'aws-lambda';
import { lamware } from '@lamware/core';

const { handler } = lamware<APIGatewayProxyHandlerV2<any>>()
  .use(powertoolsMetrics({
    // Options are pass-through to the Tracing instance.
    namespace: 'evilkiwi',
    serviceName: 'my-api',
  }))
  .execute(async ({ state }) => {
    state.metrics.addMetric('successfulBooking', MetricUnits.Count, 1);

    return { statusCode: 200 };
  });

export { handler };