(events-targets): Add retry policy

[DaWyz]

Event Targets support retry policies (retryAttempts and maxEventAge). It should be a low effort to add this feature to the Event Targets constructs.

Proposed Solution

add retryAttempts and maxEventAge properties to the targets so it can be configured without escape hatches.

import * as lambda from "@aws-cdk/aws-lambda";
import * as events from "@aws-cdk/aws-events";
import * as sqs from "@aws-cdk/aws-sqs";
import * as targets from "@aws-cdk/aws-events-targets";
import * as cdk from '@aws-cdk/core';

const fn = new lambda.Function(this, 'MyFunc', {
  runtime: lambda.Runtime.NODEJS_12_X,
  handler: 'index.handler',
  code: lambda.Code.fromInline(`exports.handler = ${handler.toString()}`),
});

const rule = new events.Rule(this, 'rule', {
  eventPattern: {
    source: ["aws.ec2"],
  },
});

const queue = new sqs.Queue(this, 'Queue');

rule.addTarget(new targets.LambdaFunction(fn, {
  deadLetterQueue: queue, // Optional: add a dead letter queue
  maxEventAge: cdk.Duration.hours(2), // Otional: set the maxEventAge retry policy
  retryAttempts: 2, // Optional: set the max number of retry attempts
}));

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

---

This is a 🚀 Feature Request

[github-actions]

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