Add the table viewer to your app

Add a table viewer to your stack #

Add the following highlighted lines to cdk_workshop_stack.py to add a TableViewer construct to your stack:

from constructs import Construct
from aws_cdk import (
    Stack,
    aws_lambda as _lambda,
    aws_apigateway as apigw,
)

from cdk_dynamo_table_view import TableViewer
from .hitcounter import HitCounter

class CdkWorkshopStack(Stack):

    def __init__(self, scope: Construct, id: str, **kwargs) -> None:
        super().__init__(scope, id, **kwargs)

        # Defines an AWS Lambda resource
        hello = _lambda.Function(
            self, 'HelloHandler',
            runtime=_lambda.Runtime.PYTHON_3_7,
            code=_lambda.Code.from_asset('lambda'),
            handler='hello.handler',
        )

        hello_with_counter = HitCounter(
            self, 'HelloHitCounter',
            downstream=hello,
        )

        apigw.LambdaRestApi(
            self, 'Endpoint',
            handler=hello_with_counter._handler,
        )

        TableViewer(
            self, 'ViewHitCounter',
            title='Hello Hits',
            table=??????
        )

What about the table? #

As you’ll notice, TableViewer requires that you specify a table property.

What we want is to somehow access the DynamoDB table behind our hit counter. However, the current API of our hit counter doesn’t expose the table as a public member.

In the next section, we’ll expose our table as a property of HitCounter so we can access it from our stack.