Platform Release 23 March 2018

You can now extend the behavior of the Orders API with your business logic with the help of API Extensions. An API Extension gets called after the processing of a create or update request of an API call but before the order is persisted. The API Extension can validate the order or apply additional updates to it. It can, for example, validate that an order with the given configuration can be created, automatically add an order number, or change states. JVM SDKv1.31.0

To get started with API Extensions in general, please read the tutorial.