Overview

The Inventory Service is the heart of the Inventory System. It receives Reserve InventoryReserve InventoryCommand•v1.0.0Command to reserve stock for the items in a checked-out cart. Ownerordering-platformSchemaMapView docs during checkout and replies with Inventory ReservedInventory ReservedEvent•v1.0.0Published when stock has been successfully reserved for an order. Ownerfulfilment-platformSchemaMapView docs or Inventory UnavailableInventory UnavailableEvent•v1.0.0Published when stock could not be reserved for an order. Ownerfulfilment-platformSchemaMapView docs. It also handles Release InventoryRelease InventoryCommand•v1.0.0Command to release a previously held inventory reservation. Ownerfulfilment-platformSchemaMapView docs and serves Get Stock LevelGet Stock LevelQuery•v1.0.0Query to fetch the current available stock level for a product. Ownerfulfilment-platformSchemaMapView docs reads, all backed by the Inventory DatabaseInventory DatabaseContainer•v1.0.0PostgreSQL database that is the system of record for stock levels and reservations.MapView docs.

Sends 2 messages

Inventory outcomes

Receives 3 messages

Inventory commands and queries

Responsibilities

Area	Description
Reservations	Handles Reserve InventoryReserve InventoryCommand•v1.0.0Command to reserve stock for the items in a checked-out cart. Ownerordering-platformSchemaMapView docs and Release InventoryRelease InventoryCommand•v1.0.0Command to release a previously held inventory reservation. Ownerfulfilment-platformSchemaMapView docs.
Lookups	Serves Get Stock LevelGet Stock LevelQuery•v1.0.0Query to fetch the current available stock level for a product. Ownerfulfilment-platformSchemaMapView docs from the Inventory DatabaseInventory DatabaseContainer•v1.0.0PostgreSQL database that is the system of record for stock levels and reservations.MapView docs.
Event publishing	Emits Inventory ReservedInventory ReservedEvent•v1.0.0Published when stock has been successfully reserved for an order. Ownerfulfilment-platformSchemaMapView docs and Inventory UnavailableInventory UnavailableEvent•v1.0.0Published when stock could not be reserved for an order. Ownerfulfilment-platformSchemaMapView docs.

Architecture diagram

Messages for this service

Sends messages (2)

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Events (2)

Name	Version	Type	Summary
Inventory Reserved	v1.0.0	event	Published when stock has been successfully reserved for an order.
Inventory Unavailable	v1.0.0	event	Published when stock could not be reserved for an order.

Receives messages (3)

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Queries (1)Commands (2)

Name	Version	Type	Summary
Reserve Inventory	v1.0.0	command	Command to reserve stock for the items in a checked-out cart.
Release Inventory	v1.0.0	command	Command to release a previously held inventory reservation.
Get Stock Level	v1.0.0	query	Query to fetch the current available stock level for a product.