Multi-consumer versioning system for retrieving lists of changed objects

A computer-implemented method, comprising:

• generating, by a cloud information service executing on one or more processors, a cache ring corresponding to a resource type of a plurality of resource types of a cloud infrastructure and comprising a plurality of entries that each correspond to one object of a plurality of objects, wherein each object of the plurality of objects corresponds to a respective resource of the resource type in the cloud infrastructure;
• receiving, from a user interface and at the cloud information service, a subscription request, wherein the subscription request comprises a version number corresponding to a highest version number present in the cache ring during a previous connection between the user interface and the cloud information service;
• performing, by the cloud information service, a search on the cache ring using the version number to determine whether any entry of the plurality of entries in the cache ring comprises the version number, wherein a particular entry of the plurality of entries including the version number indicates that the particular entry was previously transmitted from the cloud information service to the user interface;
• generating, when the version number is in the cache ring, a changed object list, wherein:
• the changed object list comprises plurality of object identifiers corresponding to a first set of entries within the plurality of entries in the cache ring having an update entry type or a delete entry type, and
• each entry of the first set of entries comprises a respective higher version number that is numerically higher than the version number;
• obtaining, based on the plurality of object identifiers in the changed object list, object information for a first plurality of objects corresponding to a portion of the first set of entries that have the update entry type;
• and
• transmitting to the user interface the object information for the first plurality of objects and a notification of deletion of a second plurality of objects corresponding to a second portion of the first set of entries that have the delete entry type.

A non-transitory computer-readable medium storing programming for execution by one or more processors, the programming comprising instructions to:

• generate, by a cloud information service executing on the one or more processors, a cache ring corresponding to a resource type of a plurality of resource types of a cloud infrastructure and comprising a plurality of entries that each correspond to one object of a plurality of objects, wherein each object of the plurality of objects corresponds to a respective resource of the resource type in the cloud infrastructure;
• receive, from a user interface and at the cloud information service, a subscription request, wherein the subscription request comprises a version number corresponding to a highest version number present in the cache ring during a previous connection between the user interface and the cloud information service;
• perform, by the cloud information service, a search on the cache ring using the version number to determine whether any entry of the plurality of entries in the cache ring comprises the version number, wherein a particular entry of the plurality of entries including the version number indicates that the particular entry was previously transmitted from the cloud information service to the user interface;
• generate, when the version number is in the cache ring, a changed object list,
• wherein:
• the changed object list comprises plurality of object identifiers corresponding to a first set of entries within the plurality of entries in the cache ring having an update entry type or a delete entry type, and
• each entry of the first set of entries comprises a respective higher version number that is numerically higher than the version number;
• obtain, based on the plurality of object identifiers in the changed object list, object information for a first plurality of objects corresponding to a portion of the first set of entries that have the update entry type;
• and
• transmit to the user interface the object information for the first plurality of objects and a notification of deletion of a second plurality of objects corresponding to a second portion of the first set of entries that have the delete entry type.