import * as cdk from '@aws-cdk/core';

portfolio.constrainCloudFormationParameters(product, {
  rule: {
    ruleName: 'testInstanceType',
    condition: cdk.Fn.conditionEquals(cdk.Fn.ref('Environment'), 'test'),
    assertions: [{
      assert: cdk.Fn.conditionContains(['t2.micro', 't2.small'], cdk.Fn.ref('InstanceType')),
      description: 'For test environment, the instance type should be small',
    }],
  },
});

import * as cdk from '@aws-cdk/core';
import * as cloudwatch from '@aws-cdk/aws-cloudwatch';

const fn = new lambda.Function(this, 'MyFunction', {
   runtime: lambda.Runtime.NODEJS_12_X,
   handler: 'index.handler',
   code: lambda.Code.fromAsset(path.join(__dirname, 'lambda-handler')),
   timeout: cdk.Duration.minutes(5),
});

if (fn.timeout) {
   new cloudwatch.Alarm(this, `MyAlarm`, {
      metric: fn.metricDuration().with({
         statistic: 'Maximum',
      }),
      evaluationPeriods: 1,
      datapointsToAlarm: 1,
      threshold: fn.timeout.toMilliseconds(),
      treatMissingData: cloudwatch.TreatMissingData.IGNORE,
      alarmName: 'My Lambda Timeout',
   });
}

import { Stack } from '@aws-cdk/core';
import { Template } from '@aws-cdk/assertions';

const stack = new Stack(/* ... */);
// ...
const template = Template.fromStack(stack);

import * as eventsources from '@aws-cdk/aws-lambda-event-sources';
import * as sqs from '@aws-cdk/aws-sqs';

declare const fn: lambda.Function;
const queue = new sqs.Queue(this, 'Queue');
fn.addEventSource(new eventsources.SqsEventSource(queue));

import * as lambda from '@aws-cdk/aws-lambda';

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), // Optional: set the maxEventAge retry policy
  retryAttempts: 2, // Optional: set the max number of retry attempts
}));