Backend API - Interactive Periodic Table Web Application

Features

• Interactive periodic table of elements.
• Experiment with chemistry.
• Create an account:
  • Create flash cards.
  • Test your knowledge with a quiz automatically generated from your discovered compounds.

Development

Configure Java SDK 21 LTS

• sdkman
• jabba
• temurin

Important

The version of Java used by the project must match the version output by ./mvnw --version

Tip

Set JAVA_HOME to the location where your Java JDK is installed

Build system is Maven

• Maven Plugin
• A local Maven wrapper is included: ./mvnw.

# test
./mvnw test
# generate a .jar
./mvnw clean package
# skip tests
./mvnw clean package -DskipTests
# run
./mvnw spring-boot:run
# override default dev,local profiles
./mvnw spring-boot:run -Dapp.profiles=test

Manually build container image with Docker

docker build -t chemlab .
docker run --rm -p 8080:8080 chemlab

Configure a local instance of MongoDB

• download/install
  • MongoDB

Testing

Repository layer tests leverage MongoDB Testcontainers. A container runtime will need to be present before running repository tests.

Secrets kept using sops and age

• download/install
  • sops
  • age

decrypt secrets

$ sops -d src/main/resources/application.enc.yml > src/main/resources/application.yml

add recipient

1. generate an age key pair: age-keygen -o key.txt
2. add the key pair to a location where sops will find it
3. add the age public key to .sops.yaml
4. run updatekeys:

sops updatekeys src/main/resources/application.enc.yml

encrypt secrets after changes to application.yml

sops encrypt src/main/resources/application.yml > src/main/resources/application.enc.yml

Frontend built with Angular 20

• https://github.com/calebd-anderson/open-chemistry-lab-frontend

Credits

This project was built with help from:

• My B.S. capstone project professor and peers at Metro State University
• An online tutorial from Get Arrays
• The PubChem API
  • public chemistry data service
• RoboHash
  • temporary profile image generator
• Package organization is inspired by onion architecture
  • yet not true onion architecture in terms of the actual dependency graph
• Some chemistry icons created by Freepik - Flaticon