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Running containerized and serverless workloads on AWS? This free Datadog eBook shows how to monitor complex, cloud-native environments—so you can improve performance, reduce latency, and spot issues before they escalate.
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This week’s system design refresher:
ICYMI: How Does a URL Shortener Work? (Youtube video)
What is Prompt Engineering? (Youtube video)
What is a REST API?
How Java HashMaps Work?
Virtualization Explained: From Bare Metal to Hosted Hypervisors
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How Does a URL Shortener Work?
What is Prompt Engineering?
What is a REST API?
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REST (Representational State Transfer) is an architectural style for building APIs that use HTTP for communication. To be considered RESTful, an API should follow six key constraints:
Client-Server: Separates the user interface from data storage and processing. This allows each side to evolve independently.
Stateless: Each request contains all the information needed to process it; the server does not store session state between requests.
Uniform Interface: Consistent resource naming and formats across the API, e.g., “/products”, “/users”.
Cacheable: Responses explicitly indicate if they can be cached (e.g., Cache-Control) to improve performance.
Layered System: Requests may pass through multiple layers (load balancers, auth services, etc.) before reaching the API server, but to the client it appears as a single endpoint.
Code on Demand (Optional): The server can send executable code (like JavaScript) to the client to extend its functionality.
Over to you: Which REST constraint do you think is most often overlooked in real-world APIs?
Big news coming out of AWS re:Invent in ☀️ Las Vegas this week. (Sponsored)
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AWS just dropped Agent Mode in its Marketplace - and it’s a game changer for anyone building or scaling with AI. Instead of digging through dozens of vendors, solutions, and integrations, Agent Mode lets you discover, compare, and deploy AI agents & tools instantly.
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