# EventProducer

Spring Boot starter application that publishes JSON events to RabbitMQ topic exchanges (no stream plugins required). The project uses Spring Boot 4.0.2 with Java 21.

## Prerequisites
- JDK 21 or newer
- Locally running RabbitMQ broker reachable at the host/port set in `src/main/resources/application.yml`

## Useful Commands
- `./gradlew bootRun` — start the application
- `./gradlew test` — run the test suite
- `./gradlew build` — create an executable jar in `build/libs`

## Configuration
- RabbitMQ connection + exchange name are defined in `application.yml`. Override via the exposed environment variables below or your own profile files.
- All messages are sent to the configured topic exchange; routing keys come from the request path.

| Environment Variable | Default | Description |
| --- | --- | --- |
| `RABBITMQ_HOST` | `mit.loc` | Broker hostname |
| `RABBITMQ_PORT` | `5672` | Broker port |
| `RABBITMQ_USERNAME` | `producer` | Username for broker auth |
| `RABBITMQ_PASSWORD` | `producer` | Password for broker auth |
| `RABBITMQ_EXCHANGE` | `dev.insurance.health.request` | Topic exchange the producer targets |
| `RABBITMQ_QUEUE` | `dev.insurance.health.request.queue` | Queue bound to the topic exchange |
| `RABBITMQ_ROUTING_KEY` | `dev.insurance.health.request.route` | Default routing key for `/api/events/messages` |

## Sending Events
```
curl --request POST http://localhost:8080/api/events/orders.created \
  --header 'Content-Type: application/json' \
  --data '{
    "eventType": "order-created",
    "payload": {
      "orderId": "12345",
      "total": 42.50
    }
  }'
```

## Sending Simple Messages
```
curl --request POST http://localhost:8080/api/events/messages \
  --header 'Content-Type: application/json' \
  --data '{
    "message": "hello topic queue"
  }'
```

## API Docs
- OpenAPI JSON: `http://localhost:8080/api-docs`
- Swagger UI: `http://localhost:8080/swagger-ui`

> If you ever remove the Gradle wrapper, run `gradle wrapper` once (requires Gradle locally) so that subsequent builds can use `./gradlew`.