Scalability of Unified API Layers

1. Introduction

In the realm of Headless and Composable Architecture, the scalability of Unified API layers is paramount. Unified APIs serve as a single entry point for various backend services, streamlining data access while enhancing system performance.

2. Key Concepts

3. Best Practices

1. Design APIs with scalability in mind, using best practices like pagination and filtering.
2. Implement caching strategies to reduce load on backend services.
3. Utilize load balancers to distribute traffic across multiple servers.
4. Monitor performance metrics continuously to identify bottlenecks.
5. Adopt API versioning to manage changes without affecting existing clients.

4. Code Example: Unified API Layer

const express = require('express');
const axios = require('axios');

const app = express();
const PORT = process.env.PORT || 3000;

// Unified API endpoint
app.get('/api/data', async (req, res) => {
    try {
        const serviceA = await axios.get('https://service-a.com/data');
        const serviceB = await axios.get('https://service-b.com/data');

        res.json({
            serviceA: serviceA.data,
            serviceB: serviceB.data,
        });
    } catch (error) {
        res.status(500).json({ error: 'Something went wrong' });
    }
});

app.listen(PORT, () => {
    console.log(`Unified API running on port ${PORT}`);
});
            

5. Flowchart: Unified API Scalability

graph TD;
    A[Start] --> B{Load Increase};
    B -- Yes --> C[Scale Up];
    B -- No --> D[Maintain];
    C --> E{Vertical Scale?};
    E -- Yes --> F[Add Resources];
    E -- No --> G[Horizontal Scale];
    G --> H[Add Instances];
    H --> D;
        

6. FAQ