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# Spring Boot REST API Service with Health Monitoring and Data Management
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# Spring Boot REST API: A Simple and Robust Microservice Template
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This Spring Boot application provides a RESTful API service with health monitoring capabilities and simple data management functionality. It offers a robust foundation for building microservices with built-in health checks and a flexible data storage interface.
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This Spring Boot application provides a lightweight REST API template with built-in health monitoring and data management capabilities. It offers a production-ready foundation for building microservices with comprehensive health checks, status monitoring, and data operations.
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The service implements health monitoring endpoints for infrastructure integration and a data management API for storing and retrieving items. Built with Spring Boot 3.2.0 and Java 17, it includes production-ready features through Spring Actuator and comprehensive testing support. The application uses an in-memory data store for demonstration purposes and can be easily extended for production use cases.
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The application implements a RESTful service with health monitoring endpoints and a flexible data management interface. It features configurable logging levels, actuator endpoints for operational insights, and a clean architecture that separates concerns between controllers and data models. Built with Spring Boot 3.2.0, it leverages modern Java 17 features and includes comprehensive test support through JUnit.
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## Repository Structure
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```
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ui-tests-starter/tstData/qdoc/updateFlow/
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├── build.gradle # Gradle build configuration with Spring Boot 3.2.0 dependencies
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.
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├── build.gradle # Gradle build configuration with Spring Boot 3.2.0 and dependencies
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├── config/
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│ └── application-local.yml # Local environment configuration with server and logging settings
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└── src/com/zetcode/tancode/
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├── App.java # Main Spring Boot application entry point
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├── controller/
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│ ├── HealthController.java # Health and status monitoring endpoints
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│ └── SampleController.java # Data management REST endpoints
2. Verify the application is running by accessing the health endpoint:
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```bash
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curl http://localhost:8080/api/health
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```
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### More Detailed Examples
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1. Check service status:
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1. Check Application Status
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```bash
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curl http://localhost:8080/api/status
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```
@@ -51,62 +54,57 @@ Expected response:
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}
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```
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2.Store a data item:
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2.Health Check
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```bash
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curl -X PUT http://localhost:8080/api/data/1 \
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-H "Content-Type: application/json" \
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-d '{"content": "Sample content"}'
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curl http://localhost:8080/api/health
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```
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3. Retrieve a data item:
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```bash
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curl http://localhost:8080/api/data/1
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Expected response:
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```json
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{
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"status": "UP",
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"message": "Service is healthy"
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}
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```
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### Troubleshooting
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1. Service Not Starting
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- Problem: Application fails to start
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- Diagnosis:
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* Check if port 8080 is already in use
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* Verify Java version with `java -version`
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- Solution:
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* Change port in `config/application-local.yml`
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* Update Java installation if needed
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2. Debug Mode
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- Enable debug logging:
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* Set `logging.level.com.example=DEBUG` in application-local.yml
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- Log location: Standard output when running locally
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- Monitor application logs:
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```bash
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tail -f logs/application.log
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```
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1. Application Won't Start
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-**Problem**: Application fails to start with port binding issues
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-**Solution**:
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```bash
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# Check if port 8080 is already in use
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lsof -i :8080
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# Modify port in config/application-local.yml if needed
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```
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2. Debugging
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- Enable debug logging by modifying `config/application-local.yml`:
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```yaml
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logging:
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level:
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com.example: DEBUG
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```
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- Check logs in console output for detailed information
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- Use Spring Boot Actuator endpoints for health monitoring:
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```bash
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curl http://localhost:8080/actuator/health
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```
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## Data Flow
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The application processes REST requests through controllers, managing data items in an in-memory store while providing health monitoring capabilities.
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The application processes HTTP requests through a layered architecture, transforming REST calls into data operations with proper error handling and response formatting.
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```ascii
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Client Request
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│
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▼
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[Spring Boot Server :8080]
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│
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├─── /api/health, /api/status
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│ │
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│ HealthController
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│
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└─── /api/data/{id}
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│
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SampleController
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│
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In-Memory Store
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Client Request → Controller Layer → Data Processing → Response
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