Production-Grade Engineering Stacks & AI

// Spring Boot 3.3 Virtual Thread Enabled Service
package com.sibiri.enterprise.service;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.kafka.core.KafkaTemplate;
import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker;

@Service
public class EnterprisePaymentService {
    private final KafkaTemplate<String, Object> kafkaTemplate;

    public EnterprisePaymentService(KafkaTemplate<String, Object> kafkaTemplate) {
        this.kafkaTemplate = kafkaTemplate;
    }

    @Transactional
    @CircuitBreaker(name = "paymentGateway", fallbackMethod = "handleGatewayFallback")
    public PaymentReceipt processPayment(PaymentCommand cmd) {
        // High-throughput virtual-thread transaction
        kafkaTemplate.send("payment-events", cmd.transactionId(), cmd);
        return new PaymentReceipt(cmd.transactionId(), "PROCESSED");
    }
}

// NestJS Modular Controller with Dependency Injection & DTO Validation
import { Controller, Post, Body, UseGuards, UsePipes, ValidationPipe } from '@nestjs/common';
import { JwtAuthGuard } from '../auth/jwt.guard';
import { CreateTelemetryDto } from './dto/telemetry.dto';
import { TelemetryService } from './telemetry.service';

@Controller('v1/telemetry')
@UseGuards(JwtAuthGuard)
export class TelemetryController {
  constructor(private readonly telemetryService: TelemetryService) {}

  @Post('ingest')
  @UsePipes(new ValidationPipe({ whitelist: true, transform: true }))
  async ingest(@Body() dto: CreateTelemetryDto) {
    return this.telemetryService.processMetricBatch(dto);
  }
}