Production-Grade Engineering Stacks & AI

// Express.js High-Throughput Aggregation Pipeline
import express from 'express';
import { MetricsModel } from '../models/Metrics';

export const router = express.Router();

router.get('/analytics/summary', async (req, res, next) => {
  try {
    const data = await MetricsModel.aggregate([
      { $match: { tenantId: req.tenant.id, createdAt: { $gte: new Date(Date.now() - 86400000) } } },
      { $group: { _id: '$eventType', count: { $sum: 1 }, avgDuration: { $avg: '$durationMs' } } },
      { $sort: { count: -1 } }
    ]).hint({ tenantId: 1, createdAt: -1 });

    return res.json({ success: true, data });
  } catch (err) {
    next(err);
  }
});

// Angular 18 Signal-Based Service with Reactive Stream
import { Injectable, signal, computed, inject } from '@angular/core';
import { HttpClient } from '@angular/common/http';

export interface TelemetryMetric { id: string; status: 'healthy' | 'critical'; latencyMs: number; }

@Injectable({ providedIn: 'root' })
export class SystemTelemetryService {
  private http = inject(HttpClient);
  private _metrics = signal<TelemetryMetric[]>([]);

  readonly metrics = this._metrics.asReadonly();
  readonly criticalCount = computed(() => this._metrics().filter(m => m.status === 'critical').length);

  fetchTelemetry(): void {
    this.http.get<TelemetryMetric[]>('/api/telemetry/nodes')
      .subscribe(data => this._metrics.set(data));
  }
}

// Next.js 15 App Router: Server Component with Streaming Suspense
import { Suspense } from 'react';
import { ArchitectureBlueprintList } from '@/components/blueprints';
import { SkeletonLoader } from '@/components/ui';

export const revalidate = 1800; // Revalidate cache every 30 minutes

export default async function ArchitectureHubPage() {
  return (
    <main className="container mx-auto px-6 py-12">
      <header className="mb-8">
        <h1 className="text-4xl font-bold tracking-tight">Production Blueprints</h1>
        <p className="text-gray-400">Verified engineering architectures deployed in enterprise production.</p>
      </header>
      <Suspense fallback={<SkeletonLoader count={6} />}>
        <ArchitectureBlueprintList />
      </Suspense>
    </main>
  );
}