C4 Order Service Component Diagram

C4 Component View for an Order Service

This C4 component diagram looks inside an order-service container. Requests enter through an API gateway and pass through an order controller and validator before reaching the order service. The service persists through a repository and collaborates with inventory, payment, event and audit components. That division helps teams discuss ownership, test boundaries and failure handling without dropping down to class diagrams. In a real system, some of the named collaborators may be internal components while others are external services; adjust the boundary labels accordingly. Keep this view focused on significant responsibilities. For endpoint signatures or method calls, move to code documentation rather than adding every helper class here.

Type Schéma fonctionnelNorme Ogata / standard controls textbook conventionMoteur schematex-blockdiagramMis à jour 24/09/2026

La demande

“A C4 component diagram for an order service. An API gateway calls an order controller, then an order validator and order service. The order service uses an order repository and orders database, event publisher, inventory service, payment client and audit logger.”

Essayez ensuiteAdd a cancellation component to the order serviceAdd retry handling around the payment client

Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01Request boundary

Uses a controller and validator before business logic.

02Persistence boundary

Isolates database access in an order repository.

03External collaborations

Makes inventory, payment, events and audit dependencies explicit.

Use this component view when explaining the responsibilities inside an order-service container.

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FAQ

Questions fréquentes

When should I use a C4 component view?

Use it when a container is important enough to explain its major internal responsibilities and dependencies.

What is the role of a repository?

It isolates persistence operations so business logic does not depend directly on the database.

Does C4 prescribe component names?

No. Names should describe meaningful responsibilities in the software being documented.