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Brain (Neurons) More think about them >> the memory gets stronger (synapsets) Less time with >> memory gets weaker Neural Network Shows the probabilitiy (this is the right classification) TensorFlow Shows the shape with neurons Training When validation set or test set come, we want our machine to learn it well that we don't want to make a perfect fit by doing the machine learning too much Best P..

Cloning into 'service-playnext'... fatal: '=' does not appear to be a git repository fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. How we solved this Reinstall WSL Make username when installing it with passwords (most important step in installing WSL. If you didn't make this username, it will automatically directs you..

In this chapter we will import a construct library called cdk-dynamo-table-viewer into our project and install it on our hit counter table.

root@BYUB-DM-7:/mnt/c/Users/k2289/repos/aws_cdk_project-2/cdk-workshop# curl -i https://e682ok6625.execute-api.us-east-1.amazonaws.com/prod/ HTTP/2 502 content-type: application/json content-length: 36 date: Mon, 28 Mar 2022 21:53:12 GMT x-amzn-requestid: f1adfafe-8b12-4be5-927d-f49d3dc947dd x-amzn-errortype: InternalServerErrorException x-amz-apigw-id: PtwrCFj6IAMFdVA= x-cache: Error from cloud..

Issue a few test requests Let’s issue a few requests and see if our hit counter works. You can also use your web browser to do that: curl https://xxxxxxxxxx.execute-api.us-east-1.amazonaws.com/prod/ curl https://xxxxxxxxxx.execute-api.us-east-1.amazonaws.com/prod/ curl https://xxxxxxxxxx.execute-api.us-east-1.amazonaws.com/prod/hello curl https://xxxxxxxxxx.execute-api.us-east-1.amazonaws.com/pr..

Allow Lambda to read/write our DynamoDB table Let’s give our Lambda’s execution role permissions to read/write from our table. Go back to hitcounter.ts and add the following highlighted lines: import * as cdk from 'aws-cdk-lib'; import * as lambda from 'aws-cdk-lib/aws-lambda'; import * as dynamodb from 'aws-cdk-lib/aws-dynamodb'; import { Construct } from 'constructs'; export interface HitCount..

Viewing CloudWatch logs for our Lambda function The first thing to do is to go and look at the logs of our hit counter AWS Lambda function. There are many tools that help you do that like SAM CLI and awslogs. In this workshop, we’ll show you how to find your logs through the AWS console. Open the AWS Lambda console (make sure you are connected to the correct region). Click on the HitCounter Lamb..

Add resources to the hit counter construct Now, let’s define the AWS Lambda function and the DynamoDB table in our HitCounter construct. Windows users: on Windows, you will have to stop the npm run watch command that is running in the background, then run npm install, then start npm run watch again. Otherwise you will get an error about files being in use. Now, go back to lib/hitcounter.ts and a..

Hit counter Lambda handler Okay, now let’s write the Lambda handler code for our hit counter. Create the file lambda/hitcounter.js: const { DynamoDB, Lambda } = require('aws-sdk'); exports.handler = async function(event) { console.log("request:", JSON.stringify(event, undefined, 2)); // create AWS SDK clients const dynamo = new DynamoDB(); const lambda = new Lambda(); // update dynamo entry for ..

Create a new file for our hit counter construct Create a new file under lib called hitcounter.ts with the following content: import * as cdk from 'aws-cdk-lib'; import * as lambda from 'aws-cdk-lib/aws-lambda'; import { Construct } from 'constructs'; export interface HitCounterProps { /** the function for which we want to count url hits **/ downstream: lambda.IFunction; } export class HitCounter..