Information processing apparatus, data providing system, and data providing method

An information processing system comprising:

• an information processing apparatus;
• and
• a request source device configured to send a request message including an identifier corresponding to data and a condition related to time corresponding to the data, wherein the information processing apparatus includes:
• a memory configured to store the data and time information indicating the time of storing the data;
• a processor coupled to the memory and configured to:
• receive, from a request source device, a request message including an identifier corresponding to the data and a condition related to time corresponding to the data;
• search the memory for required data that corresponds to the identifier and the time information satisfying the condition;
• acquire the required data from the memory when the required data is stored in the memory;
• acquire the required data from another device when the required data is not stored in the memory;
• and
• transmit the required data to the request source device.

A data providing method for an information processing apparatus including a memory configured to store data and time information indicating the time of storing the data, and a processor coupled to the memory, comprising:

• receiving, from a request source device, a request message including an identifier corresponding to the data and a condition related to time corresponding to the data;
• searching the memory for required data that corresponds to the identifier and the time information satisfying the condition;
• acquiring the required data from the memory when the required data is stored in the memory;
• acquiring the required data from another device when the required data is not stored in the memory;
• and
• transmitting the required data to the request source device.