constructor()

in code/typescript/tests-workshop/lib/hitcounter.ts [27:56]

• 23 lines of code
• 3 McCabe index (conditional complexity)

  constructor(scope: Construct, id: string, props: HitCounterProps) {
    if (props.readCapacity !== undefined && (props.readCapacity < 5 || props.readCapacity > 20)) {
      throw new Error('readCapacity must be greater than 5 and less than 20');
    }

    super(scope, id);

    const table = new dynamodb.Table(this, 'Hits', {
      partitionKey: { name: 'path', type: dynamodb.AttributeType.STRING },
      encryption: dynamodb.TableEncryption.AWS_MANAGED,
      readCapacity: props.readCapacity ?? 5
    });
    this.table = table;

    this.handler = new lambda.Function(this, 'HitCounterHandler', {
      runtime: lambda.Runtime.NODEJS_14_X,
      handler: 'hitcounter.handler',
      code: lambda.Code.fromAsset('lambda'),
      environment: {
        DOWNSTREAM_FUNCTION_NAME: props.downstream.functionName,
        HITS_TABLE_NAME: table.tableName
      }
    });

    // grant the lambda role read/write permissions to our table
    table.grantReadWriteData(this.handler);

    // grant the lambda role invoke permissions to the downstream function
    props.downstream.grantInvoke(this.handler);
  }