PutMetricData

Source: src/AWS/CloudWatch/PutMetricData.ts

Runtime binding for cloudwatch:PutMetricData — publish custom metric datums from inside a function runtime.

Provide CloudWatch.PutMetricDataHttp on the hosting Lambda Function to satisfy the requirement. For high-volume publishing prefer the batching MetricSink, which packs datums into 1000-datum PutMetricData calls.

Publishing Metrics

export default MyFunction.make(
  { main: import.meta.url, functionUrl: true },
  Effect.gen(function* () {
    // init — grants cloudwatch:PutMetricData to the function
    const putMetricData = yield* AWS.CloudWatch.PutMetricData();

    return {
      fetch: Effect.gen(function* () {
        // runtime — publish a datum on every request
        yield* putMetricData({
          Namespace: "MyApp/Payments",
          MetricData: [
            { MetricName: "PaymentProcessed", Value: 1, Unit: "Count" },
          ],
        });
        return HttpServerResponse.text("ok");
      }).pipe(Effect.orDie),
    };
  }).pipe(Effect.provide(AWS.CloudWatch.PutMetricDataHttp)),
);