Patent ID: 11968253
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A request delivery device in a publish subscribe system comprising:
a processor;
a memory;
a request storage configured to store a request scheduled to be transmitted to a server;
a transmitter configured to transmit, to the server, the request read from the request storage, the server capable of processing the request;
a receiver configured to receive a completion message indicating that processing of the request is completed; and
a completion list storage configured to store information regarding the completion message,
wherein the transmitter is configured to, based on the request being stored in the completion list storage, discard the request without transmitting the request to the server,
wherein the transmitter is configured to, based on the request not being stored in the completion list storage, transmit, to the server, the request and store the request again in the request storage, and
wherein, based on the receiver receiving a completion message of a same request from a second server for a request for which the information regarding the completion message from a first server has already been stored in the completion list storage, the receiver instructs the second server to roll back the request.