Class SubMinuteLambdaScheduler

A construct that creates a scheduler to invoke a Lambda function at sub-minute intervals.

This construct leverages AWS Step Functions and EventBridge to invoke a Lambda function multiple times per minute based on the specified interval. It is designed for use cases where a Lambda function needs to be triggered more frequently than once per minute.

The construct defines a Step Functions state machine that invokes the Lambda function and waits for the next iteration based on the provided interval. An EventBridge rule is used to trigger the state machine every minute.

Example

import { Stack } from 'aws-cdk-lib';
import { lambda } from '@reuters-graphics/structs';

export class MyLambdaStack extends Stack {
  constructor(scope: Construct, id: string, props: LambdaStackProps) {
    super(scope, id, props);

    const myLambda = new lambda.NodeJSLambda(this, 'my-lambda', {
      entry: './src/index.ts',
      handler: 'handle',
    });

    const schedule = new lambda.schedulers.SubMinuteLambdaScheduler(
      this,
      'my-lambda-schedule',
      {
        interval: 15,
        lambdaFunction: myLambda.lambda,
        enabled: true,
      }
    );

    schedule.eventsRule; // EventBridge rule
    schedule.stepFunction; // Step Functions state machine
  }
};
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