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Space Finder app initialisation - Coggle Diagram

Space Finder app initialisation

- - - - devDependencies
    - - for debugging
    - - aws-cdk
      - aws-cdk-lib
      - constructs
- - - - Launcher.ts
    - - SpaceStack.ts
- - - - cdk commands
        
        such as
        
        cdk synth
        
        cdk deploy
        
        will look for the app entry in this file

adding a basic AWS lambda

services/hello/hello.js

exports.main = async function(event, context) {
  return {
    statusCode: 200,
    body: 'Hello from lambda!'
  }
}

add to SpaceStack.ts

import {
  Code,
  Function as LambdaFunction,
  Runtime,
} from "aws-cdk-lib/aws-lambda";

export class SpaceStack extends Stack {
  constructor(scope: Construct, id: string, props: StackProps) {
    super(scope, id, props);

    const helloLambda = new LambdaFunction(this, "helloLambda", {
      runtime: Runtime.NODEJS_14_X,
      code: Code.fromAsset(join(__dirname, "..", "services", "hello")),
      handler: "hello.main",
    });
  }
}

linking the lambda to API Gateway

add to SpaceStack.ts

import { LambdaIntegration, RestApi } from "aws-cdk-lib/aws-apigateway";

export class SpaceStack extends Stack {
  private api = new RestApi(this, "SpaceApi");

  constructor(scope: Construct, id: string, props: StackProps) {
    super(scope, id, props);

    const helloLambda = ...;
    const lambdaIntegration = new LambdaIntegration(helloLambda);
    const lambdaResource = this.api.root.addResource("hello");
    lambdaResource.addMethod("GET", lambdaIntegration);
  }
}

adding a DynamoDB table

create class for creation of table

import { AttributeType, Table } from "aws-cdk-lib/aws-dynamodb";

export class GenericTable {
  ...
  private createTable() {
    this.table = new Table(this.stack, this.name, {
      partitionKey: {
        name: this.primaryKey,
        type: AttributeType.STRING,
      },
      tableName: this.name,
    });
  }
}

add to SpaceStack.ts

import { GenericTable } from "./GenericTable";

export class SpaceStack extends Stack {
  private spacesTable = new GenericTable("Spaces", "spaceId", this);

  constructor(scope: Construct, id: string, props: StackProps) {
    super(scope, id, props);
    ...
  }
}