Custom Resource Example with the AWS CDK

order-service.ts

 // this custom resource will create our postgres table on deploy if it doesn't exist
const provider: cr.Provider = new cr.Provider(
  this,
  "CreateOnlineOrdersTableCustomResource",
  {
    onEventHandler: createTableHandler, // this lambda will be called on cfn deploy
    logRetention: logs.RetentionDays.ONE_DAY,
    providerFunctionName: "create-online-table-custom-resource",
  }
);

new CustomResource(this, "CustomResource", {
  serviceToken: provider.serviceToken,
  properties: {
    ...environment,
  },
});