Creates an API Gateway API with a POST Method, a SQS queue, and a Lambda function. Requests to the API are enqueued into the SQS queue, which triggers the Lambda function.

The cdk.json file tells the CDK Toolkit how to execute your app.

This project is set up like a standard Python project. The initialization process also creates a virtualenv within this project, stored under the .env directory. To create the virtualenv it assumes that there is a python3 (or python for Windows) executable in your path with access to the venv package. If for any reason the automatic creation of the virtualenv fails, you can create the virtualenv manually.

To manually create a virtualenv on MacOS and Linux:

$ python3 -m venv .env

After the init process completes and the virtualenv is created, you can use the following step to activate your virtualenv.

$ source .env/bin/activate

If you are a Windows platform, you would activate the virtualenv like this:

% .env\Scripts\activate.bat

Once the virtualenv is activated, you can install the required dependencies.

$ pip install -r requirements.txt

At this point you can now synthesize the CloudFormation template for this code.

$ cdk synth

Upon successful deployment, you should see an API Gateway REST API in your account. It can be tested from the console or the CLI:

$ aws apigateway test-invoke-method --rest-api-id <API ID> --resource-id <RESOURCE ID> --http-method POST --body {"key":"value"}

This request should complete with a 200 OK. The Lambda function should print the API Gateway request body in its CloudWatch logs. (https://docs.aws.amazon.com/lambda/latest/dg/monitoring-cloudwatchlogs.html)

2020-05-27T11:50:44.755-05:00           Received Message Body from API GW: {key:value}

This message will also be visible in the SQS Queue metrics in CloudWatch. (https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-access-metrics.html)