Patent ID: 8266253

Claim:
A server system for returning an event message in response to an HTTP request from a client terminal, said HTTP request including an application identifier, said server system comprising: a request reception server, a plurality of installed event message transmission servers, a client management server, and an application server, characterized in that: said request reception server receives the HTTP request from said client device, and transfers the HTTP request to an event message transmission server, said client management server stores therein a set of said client device, which has made the HTTP request, and an event message transmission server to which the HTTP request is transferred, and is responsive to the HTTP request to transmit a server identifier of said event message transmission server to which the HTTP request has been transferred to said application server, and said application server, upon receipt of the identifier of said event message transmission server after the HTTP request has been made, transmits an application identifier included in the HTTP request and an event message to an event message transmission server indicted by the server identifier, and said event message transmission server suspends the HTTP request transferred from said request reception server, and upon receipt of the event message from said application server, transmits the event message to the client device as an HTTP response.