There are several services and sub-folders in this project:

• service: main app leverage Spring Boot application
• load-test: project for generating load tests via Gatling framework to be able to observe metrics on the Grafana dashboard
• component-test: implemented via Cucumber framework to test components integration
• docker: contains docker-compose file with obligatory and complimentary services for local development and testing
• Gradle: wrapper files and version catalog for dependencies management

Start obligatory infrastructure(db, Kafka's services):

docker compose --file ./docker/docker-compose.yaml --profile 'kafka-admin' --profile 'app' --profile 'observability' up -d

To stop infrastructure(db, Kafka's services):

docker compose --file ./docker/docker-compose.yaml --profile 'kafka-admin' --profile 'app' stop

To start observability infrastructure(Prometheus, Grafana, prometheus-alert and so):

docker compose --file ./docker/docker-compose.yaml --profile 'observability' up -d

To stop ALL infrastructure(Prometheus, Grafana, prometheus-alert and so):

docker compose --file ./docker/docker-compose.yaml --profile 'observability' --profile 'kafka-admin' --profile 'app' stop

The docker compose file contains several services that use host network

service:
   promehteus: 
     network_mode: host

It was done because of the issues with docker running in WSL and running the 'mega-app' service on Windows host. It was the easiest way to forward ports and to connect the running services with Prometheus. Ideally the Prometheus container should be able to establish connection to the running services via {{ docker.for.win.host.internal }} or {{ host.docker.internal:host-gateway }} .See the How to connect to the Docker host from inside a Docker container? Additionally, it's needed to Prometheus config to be reconfigured according to docker network configuration(use service name) for Grafana, prom/alertmanager and Prometheus itself.

To run Gatling test see the file README.md

To run component test see the file README.md

To apply OpenRewrite recipes run the following command:

./gradlew rewriteRun --init-script init.gradle -Drewrite.activeRecipe=org.openrewrite.FindSpringUses

or add/uncomment recipes in the init.gradle file and run

./gradlew rewriteRun --init-script init.gradle