Abstract: An order processing system operates in conjunction with external systems to process orders received by an online shopping system. The order processing system maintains execution references that indicate that an external system is performing an action with respect to an item in an order. Each execution reference may store data defining the state of the corresponding execution. The external systems may update the stored state according to a state machine, which may be an acyclic directed graph. The order processing system also maintains an execution registry including data specifying the actions performed by external systems that may not be performed in combination. When a request is received to start an action with respect to an item in an order, the order processing system uses the execution references associated with the item and the execution registry to determine if the request may be granted.

Abstract: Systems and methods are disclosed for management of resource objects (“resources”) within a computing environment. Resources may be stored in a number of resource spaces, each including service endpoints configured to facilitate access to resources. On creation of a resource, an identifier may be assigned to the resource. Thereafter, the identifier may be used to determine an appropriate service endpoint for accessing the resource. For example, each resource space may submit a set of resolution rules to a resolution server. Each set of resolution rules may be used to identify an appropriate endpoint for accessing a resource. Thereafter, a request for a resource may first retrieve the set of resolution rules, and use such rules to determine an appropriate service endpoint. Illustratively, utilization of resource resolution rules may enable the service endpoint to be modified without requiring modification of client devices.

Abstract: An order processing system operates in conjunction with external systems to process orders received by an online shopping system. The order processing system maintains execution references that indicate that an external system is performing an action with respect to an item in an order. Each execution reference may store data defining the state of the corresponding execution. The external systems may update the stored state according to a state machine, which may be an acyclic directed graph. The order processing system also maintains an execution registry including data specifying the actions performed by external systems that may not be performed in combination. When a request is received to start an action with respect to an item in an order, the order processing system uses the execution references associated with the item and the execution registry to determine if the request may be granted.

Abstract: Systems and methods are disclosed for management of resource objects (“resources”) within a computing environment. Resources may be stored in a number of resource spaces, each including service endpoints configured to facilitate access to resources. On creation of a resource, an identifier may be assigned to the resource. Thereafter, the identifier may be used to determine an appropriate service endpoint for accessing the resource. For example, each resource space may submit a set of resolution rules to a resolution server. Each set of resolution rules may be used to identify an appropriate endpoint for accessing a resource. Thereafter, a request for a resource may first retrieve the set of resolution rules, and use such rules to determine an appropriate service endpoint. Illustratively, utilization of resource resolution rules may enable the service endpoint to be modified without requiring modification of client devices.

Abstract: Systems and methods are disclosed for management of resource objects (“resources”) within a computing environment. Resources may be stored in a number of resource spaces, each including service endpoints configured to facilitate access to resources. On creation of a resource, an identifier may be assigned to the resource. Thereafter, the identifier may be used to determine an appropriate service endpoint for accessing the resource. For example, each resource space may submit a set of resolution rules to a resolution server. Each set of resolution rules may be used to identify an appropriate endpoint for accessing a resource. Thereafter, a request for a resource may first retrieve the set of resolution rules, and use such rules to determine an appropriate service endpoint. Illustratively, utilization of resource resolution rules may enable the service endpoint to be modified without requiring modification of client devices.