The Todo web application is an example application built with Micronaut and GraalVM in the form of a microservice architecture.

The purpouse of the application is to demonstrate GraalVM and Native Image speed ups in comparison with vanilla jvm.

The application is currently broken into 3 pieces. The frontend, todo-service and loadTest project. Aditionally the api project contains classes shared amongst the frontend and the todo-service

A minimalistic service side rendering web application that renders data from the todo-service. The frontend comunincates to the backend service via a http client. It sole purpouse(for now) is to render data.

A backend webservice that exposes RESTful CRUD operations on Todo items. This service is currently backed by a in-memory data structure, however new implementations can be easily added.

Common classes shared by both the frontend and the Todo-service

A project containing jmeter load tests. Currently the load test apply traffic on the todo-service only

• Gradle
• Docker
• Docker Compose
• GraalVM (if run without docker)
• JMeter (for running load tests, if run without docker)

There are generally two ways build and run the project

To build all the services

./gradlew assemble

If you want to build an specific service

./gradlew frontend:assemble //for the frontend
./gradlew todo-service:assemble //for the todo-service

To execute the services

./gradlew todo-service:run //for the todo-service
./gradlew frontend:run //for the frontend

The above will start the frontend service in http:https://localhost:8081/todos and the todo-service in https://localhost:8443/api/todos

To run load tests you can execute the below. If your are running without docker make sure you have jmeter install and it is in your PATH

cd loadTests && ./start-load-tests.sh

Open loadTests/out/index.html to see the results

To build and run all the service including load tests via docker:

• ./gradlew assemble
• ./deployments/local/build-docker-compose.sh [|graalvm|hotspot] Builds a docker compose file with different docker images running on either: native-image, graalvm or hotspot
• docker-compose up --build

To build and run all the service including load tests via kubernetes:

• ./gradlew assemble
• ./deployments/k8/build-kubernetes.sh [|graalvm|hotspot] Builds Docker images, if they don't exist, and creates a kubernetes config files in k8 folder.
• [Optional] for cluster deployment the created images must be pushed into Docker registry used by the cluster and imagePullSecrets may be required.
• kubectl create -f k8