// Golang Microservice Implementation
package main

import (
    "context"
    "log"
    "net/http"
    "time"
    
    "github.com/gin-gonic/gin"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

func main() {
    // Database connection
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
    defer cancel()
    
    client, err := mongo.Connect(ctx, options.Client().ApplyURI("mongodb://localhost:27017"))
    if err != nil {
        log.Fatal(err)
    }
    
    // Setup router
    router := gin.Default()
    router.GET("/api/data", getDataHandler)
    router.POST("/api/data", createDataHandler)
    
    // Start server
    http.ListenAndServe(":8080", router)
}

// Java Spring Boot Service
@Service
public class DataProcessingService {
    private final KafkaTemplate<String, String> kafkaTemplate;
    private final Repository repository;
    
    @Autowired
    public DataProcessingService(
            KafkaTemplate<String, String> kafkaTemplate,
            Repository repository) {
        this.kafkaTemplate = kafkaTemplate;
        this.repository = repository;
    }
    
    @Transactional
    public void processData(DataRequest request) {
        // Validate request
        if (!isValid(request)) {
            throw new InvalidRequestException();
        }
        
        // Process data
        Entity result = transformData(request);
        repository.save(result);
        
        // Send event
        kafkaTemplate.send("data-processed", 
            objectMapper.writeValueAsString(result));
    }
    
    private boolean isValid(DataRequest request) {
        // Validation logic
        return request != null && request.getId() != null;
    }
}