Production-Grade
Developer Systems
& Cloud Toolkits.

# FastAPI High-Throughput Production Microservice Template
from contextlib import asynccontextmanager
from fastapi import FastAPI, Depends, HTTPException, status
from redis.asyncio import ConnectionPool, Redis

@asynccontextmanager
async def lifespan(app: FastAPI):
    # Initialize high-performance non-blocking Redis connection pool
    app.state.pool = ConnectionPool.from_url("redis://localhost:6379/0", max_connections=50)
    app.state.redis = Redis(connection_pool=app.state.pool)
    yield
    await app.state.redis.close()
    await app.state.pool.disconnect()

app = FastAPI(title="Dominator Production Microservice", lifespan=lifespan)

@app.get("/v1/health")
async def health_check():
    return {"status": "HEALTHY", "architecture": "DOMINATOR_SYSTEMS"}

// Next.js 15 App Router - Stripe Webhook Idempotency Handler
import { headers } from "next/headers";
import { stripe } from "@/lib/stripe";
import { db } from "@/lib/db";

export async function POST(req: Request) {
  const body = await req.text();
  const signature = headers().get("Stripe-Signature") as string;

  const event = stripe.webhooks.constructEvent(
    body,
    signature,
    process.env.STRIPE_WEBHOOK_SECRET!
  );

  // Atomic idempotency lock: prevent double credit fulfillment
  const exists = await db.processedEvent.findUnique({ where: { id: event.id } });
  if (exists) return new Response("Event already processed", { status: 200 });

  await db.processedEvent.create({ data: { id: event.id } });
  return new Response(JSON.stringify({ received: true }), { status: 200 });
}

# Multi-Stage Hardened Production Alpine Build (<50MB)
FROM python:3.11-alpine AS builder
WORKDIR /app
RUN apk add --no-cache build-base libffi-dev
COPY requirements.txt .
RUN pip install --no-cache-dir --prefix=/install -r requirements.txt

FROM python:3.11-alpine AS runner
WORKDIR /app
RUN addgroup -g 1001 appgroup && adduser -u 1001 -G appgroup -s /bin/sh -D appuser
COPY --from=builder /install /usr/local
COPY . .
USER appuser
EXPOSE 8000
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]