API Gateway Manifest

Java Spring Boot Gateway

📁 java-api-gateway/

Project Configuration

📄 pom.xml

• Maven configuration
• Spring Boot 3.2.3
• Java 17
• Dependencies: spring-boot-starter-web, spring-boot-starter-webflux, lombok

Application Entry Point

☕ src/main/java/com/example/gateway/GatewayApplication.java

• Spring Boot application class
• RestTemplate and WebClient beans

REST Controller

☕ src/main/java/com/example/gateway/controller/TrafficController.java

• GET /api/traffic/health - Health check
• GET /api/traffic/action - Action with auto-generated observations
• POST /api/traffic/action - Action with custom observations
• Helper methods for observation generation and action mapping

Service Client

☕ src/main/java/com/example/gateway/service/RlInferenceClient.java

• HTTP client for Python FastAPI service
• predictAction() method
• Health check functionality
• Error handling with RlInferenceException
• Inner classes: PredictionResponse, HealthResponse

Configuration

📄 src/main/resources/application.properties

• Server configuration
• RL service URL and timeout
• Logging levels

Deployment

📄 Dockerfile

• Multi-stage Java container
• Maven builder stage
• Eclipse Temurin 17 JRE runtime
• Exposes port 8080