Architecture Pattern Guide

Web Application Architecture

What This Chapter Is About

Help readers design a provider-neutral web application pattern by starting with the request path, then adding public entry, runtime responsibility, data access, protection, operations, and provider lenses.

This chapter builds on Part I by showing how the pattern language becomes a familiar application design. You will see that web architecture is not only where web code runs. It is the full operated path from user request to application capability, data dependency, and recovery behavior.

Keep one durable idea in view:

Web application architecture is the design of a protected, observable, and operable request path around a user-facing workload.

Sections

  1. Web Application Request-Path Mental Model

  2. Public Entry, Routing, and Edge Protection

  3. Web Runtime and Hosting Responsibility

  4. Data Access, Private Connectivity, and Secrets

  5. Scaling, Deployment, Observability, and Cost

  6. Web Application Provider Lens Notes

How the Chapter Develops

The chapter develops in this order:

  1. Start with the user request path and the pattern responsibilities around it.

  2. Explain public entry, routing, TLS, caching, and edge protection before naming provider products.

  3. Place the web runtime by responsibility: managed platform, container, Kubernetes, function, or virtual machine.

  4. Connect the web workload to data dependencies through identity, private connectivity, and secret handling.

  5. Add scaling, deployment safety, observability, availability, and cost as pattern behavior.

  6. End with provider lens notes that translate the pattern into Azure and future AWS examples only after the pattern is clear.

What You Will Be Able to Do

By the end of this chapter, the reader should be able to:

  • Sketch a provider-neutral web application request path.

  • Explain public entry and edge protection as responsibilities, not product names.

  • Compare runtime placement options by operating responsibility and workload shape.

  • Describe safe data access from web workloads.

  • Discuss scaling, deployment, observability, reliability, and cost as part of the web pattern.

  • Add provider lenses without turning the chapter into an Azure-first or AWS-first service catalog.

Key Ideas

  • A web application pattern starts with request flow.

  • Public entry choices influence routing, TLS, caching, abuse protection, latency, and operations.

  • Runtime hosting is a responsibility trade-off: control, portability, platform operations, scaling, and deployment model.

  • Data access includes identity, authorization, secrets, network path, private access, and monitoring.

  • Production web architecture includes scale behavior, release safety, health checks, logs, traces, alerts, and cost ownership.

  • Azure CH08 is seed material; Azure service names belong in provider lens notes unless the target section explicitly needs them.