cdk-api-gateway-split-stacks

index.ts

import { RestApi, Cors, CfnResource, CfnMethod, AuthorizationType } from '@aws-cdk/aws-apigateway';
import * as lambda from '@aws-cdk/aws-lambda';
import { Stack, App, StackProps } from '@aws-cdk/core';
import { NestedStack } from '@aws-cdk/aws-cloudformation';

const name = 'stackName';

export class Methods extends Stack {
  constructor(app: App, id: string, props: StackProps) {
    super(app, id, props);

    const restApi = new RestApi(this, name, {
      defaultCorsPreflightOptions: {
        allowOrigins: Cors.ALL_ORIGINS,
      },
    });

    const root = restApi.root.addResource('hashtags');

    const defaultLambdaProps = {
      code: new lambda.AssetCode('lambda'),
      runtime: lambda.Runtime.NODEJS_10_X,
      memorySize: 256,
      tracing: lambda.Tracing.ACTIVE,
    };

    // tslint:disable-next-line:no-function-constructor-with-string-args
    const lambdaFunction = new lambda.Function(
      this,
      'lambdaFunction',
      {
        ...defaultLambdaProps,
        handler: 'get-hashtags-from-keywords.handler',
      });

    const methodsStack = new NestedStack(this, 'methodsStack');

    const singleItem = new CfnResource(methodsStack, 'id', {
      restApiId: root.restApi.restApiId,
      pathPart: '{keywords}',
      parentId: root.resourceId,
    });

    new CfnMethod(methodsStack, 'method1', {
      httpMethod: 'GET',
      restApiId: root.restApi.restApiId,
      resourceId: root.resourceId,
      authorizationType: AuthorizationType.NONE,
      integration: {
        integrationHttpMethod: 'POST',
        type: 'AWS_PROXY',
        uri: `arn:aws:apigateway:us-east-1:lambda:path/2015-03-31/functions/${lambdaFunction.functionArn}/invocations`,
      },
    });

    new CfnMethod(methodsStack, 'method2', {
      httpMethod: 'POST',
      restApiId: root.restApi.restApiId,
      resourceId: singleItem.ref,
      authorizationType: AuthorizationType.NONE,
      integration: {
        integrationHttpMethod: 'POST',
        type: 'AWS_PROXY',
        uri: `arn:aws:apigateway:us-east-1:lambda:path/2015-03-31/functions/${lambdaFunction.functionArn}/invocations`,
      },
    });

    new CfnMethod(methodsStack, 'method3', {
      httpMethod: 'DELETE',
      restApiId: root.restApi.restApiId,
      resourceId: singleItem.ref,
      authorizationType: AuthorizationType.NONE,
      integration: {
        integrationHttpMethod: 'DELETE',
        type: 'AWS_PROXY',
        uri: `arn:aws:apigateway:us-east-1:lambda:path/2015-03-31/functions/${lambdaFunction.functionArn}/invocations`,
      },
    });

    // this is required to trigger deployment update, but may not include all changes
    restApi.latestDeployment?.addToLogicalId(Date.now());
    // this is required for creation and to wait for all changes before updating deployment
    restApi.latestDeployment?.node.addDependency(methodsStack);
  }
}

new Methods(new App(), 'MethodsStack', { stackName: name });