README

Tech used

• Micronaut
  • Micronaut AWS Lambda
• GraalVM
• AWS DynamoDB
• AWS API Gateway
• Terraform

How to run

GraalVM is used on the Lambda, but locally you can use any JDK starting from version 8. With Intellij create a new Micronaut configuration and select the src/main/java/com/meesvanstraten/Application.java as startup class.

Build

Run ./mvnw package -Dpackaging=docker-native -Dmicronaut.runtime=lambda -Pgraalvm -eto package the application as a GraalVM native image. A .Zip file will be created in the following directory ./target/function.zip.

Deploy

The main.tf contains the instructions to provision the following:

• DynamoDB table for storing quotes.

• Lambda function with custom runtime to run the GraalVM application.

• AWS REST API Gateway for invoking Lambda.

  Run Terraform apply to provision the Lambda and DynamoDB, this will also upload the .Zip file created in the previous step to the lambda.

Use API

On the following path the API is available: <GeneratedAPIGatewayUrlHere>/prod. The following endpoints are available:

GET /quote/random

returns a random quote from external API.

GET /quote/{author}

Returns all quotes by author.

POST /quote

Post new quote, with as JSON in the body of the request: {"quote":"My cool quote","author":"Your name"}

Tests

The src/test folder contains some tests as well.