OverviewOwns checkout flow, order lifecycle, and the handoff from purchase intent to confirmed order## Message Flow
Messages for this service
The linked specifications in the frontmatter drive EventCatalog reference views for this service.
Orders Checkout
Description
Orders Checkout is the bounded context that owns the commercial commitment to buy. It starts the checkout, reacts to stock and payment outcomes, and decides whether the order is created, confirmed, or cancelled.
It is the service that marks the transition from customer purchase intent into a real order that other operational contexts can act on.
Scope
- Start customer checkout for selected items
- Own the order lifecycle from creation to confirmation or cancellation
- Publish the pivotal `OrderConfirmed` event that shifts the flow into operations
- React to stock and payment outcomes without owning payment or inventory rules
Main domain elements
- `Order`: aggregate for the checkout commitment
- `OrdersCheckoutService`: commands for starting checkout, confirming, and cancelling orders
- `OrderCreated`: event announcing that checkout successfully created an order
- `OrderConfirmed`: event that hands the flow off to downstream operational contexts
- `OrderCancelled`: event announcing the commercial flow could not complete
- `StockUnavailable`: commercial outcome when checkout cannot secure scarce stock
Orders Checkout
Overview
Orders Checkout describes the business facts produced as a customer moves from an intention to purchase to a durable commercial commitment. It is the Arcadia Editions bounded context that turns a proposed purchase into an order that can be recognized, managed, and acted on with confidence. This catalog explains the meaningful checkout outcomes in business terms, giving product, operations, support, and engineering teams a shared vocabulary without requiring knowledge of the implementation behind them.
Domain context
The Orders domain covers the commercial lifecycle of an order: its creation, confirmation, and cancellation. Checkout owns the earliest decisive stage, when customer purchase intent becomes a formal order commitment. It provides a clear boundary between a shopping decision and an order that has entered the business lifecycle.
An order in this context is a commercial promise with an identity and lifecycle. The context keeps that promise understandable by expressing progress through meaningful business states rather than incidental processing activity. A successful progression establishes that the order can move forward as a valid commitment. An unsuccessful progression records that the commitment could not be completed, allowing teams to distinguish a concluded attempt from an active order.
Responsibilities
Orders Checkout owns the decision-making and recordkeeping needed to create, confirm, or cancel an order during checkout. It establishes the order as a commercial entity, maintains its lifecycle while checkout is underway, and communicates material outcomes in language that business users can interpret consistently.
The context represents a checkout attempt as a coherent whole. It makes the resulting order status explicit, providing a stable answer to essential questions: has an order been created, is its commitment confirmed, or has the checkout been cancelled? It also preserves the significance of these outcomes over time. A confirmation is a business milestone, not merely a technical success, and a cancellation is a definitive commercial result rather than an ambiguous absence of progress.
Boundaries
Orders Checkout does not define product information, maintain stock positions, perform financial-provider work, arrange shipment, or communicate with customers. Its role is to own the commercial decision and lifecycle of the order during checkout, not the specialist processes that may inform that decision.
The service also does not expose internal processing mechanics as business meaning. Temporary checks, operational retries, implementation choices, and transport details are deliberately absent from this catalog. This keeps the published description durable as the service evolves and lets readers rely on the business intent of its outcomes instead of incidental design details.
Business value
By giving checkout a clear owner and a concise set of durable outcomes, Orders Checkout reduces ambiguity around a pivotal moment in the customer experience. Teams can align on the difference between interest in a purchase, an established order, a confirmed commitment, and a cancelled attempt. This shared understanding improves customer support, operational reporting, product analysis, and governance because each can reason from the same commercial language.
The catalog provides a stable, human-readable reference for the business meaning of checkout outcomes while allowing the underlying service to evolve independently. In doing so, Orders Checkout helps Arcadia Editions maintain reliable order records, make the customer journey easier to explain, and preserve trust in the commercial commitments represented by its platform. 2026-05-21
- rewrote `README.md` to explain Orders Checkout as a bounded context
- added `SUMMARY.md` with the business-purpose summary for event catalog generation
- added this `CHANGE.log` to track documentation updates
- added `EVENT_CATALOG.md` with an evergreen description of Orders Checkout for event catalog publication