How to cache data from network before it is sent to printer

Question

Hi All,

I am currently assigned a new project: we have a LAN and printer, currently all print tasks are sent to printer directly, now we want to set up a print server with a printer attached to it, all the print tasks will be sent to the server instead of the printer. The server caches the data it receives from network, some sort of task names will be displayed for user to select his own task to print.

I wonder how to do this? It will be greatly appreciated if you can give me any hint.

Thanks.