Java Rest API Architecture

Spring Boot Rest API Architecture

The diagram below represents the architecture used in the project.

Upon successful execution of a database update, the microservice publishes one or more events describing how the persistence state has changed e.g. if a “Create Category” event is successful, then a “Menu Updated” event and a “Category Created” event will be published.

Application Events contain the following basic information:

Event Attribute	Description
id	Unique id of the event instance (format: uuid)
eventCode	Code identifying the type of event
correlationId	Transaction identifier. This attribute is also returned as a response header if the command was received via the REST API and can also be found in all log entries relating to the transaction. CorrelationID can either be supplied by the input event/request or generated when not supplied.
operationCode	Code identifying the operation which generated the event
creationDate	When the event was created
Custom Attribute(s)	e.g. menuId