sample-cdk.js

// Create a lambda that recrawls changelogs discovered in the past
const recrawlLambda = new lambda.Function(this, 'recrawl', {
  runtime: lambda.Runtime.NodeJS810,
  handler: 'recrawl.handle',
  code: lambda.Code.asset('./app/recrawl'),
  timeout: 360,
  environment: {
    CHANGELOGS_TABLE_NAME: props.changelogsTable.tableName,
    DISCOVERED_TOPIC_NAME: props.toCrawlTopic.topicArn
  }
});

// Grant the lambda permission to modify the tables
props.changelogsTable.grantReadWriteData(recrawlLambda.role);
props.toCrawlTopic.grantPublish(recrawlLambda.role);

// Schedule the recrawler to run once every minute
this.eventRule = new events.EventRule(this, 'recrawl-check-schedule', {
  scheduleExpression: 'rate(1 minute)',
  targets: [recrawlLambda]
});