STRUCTURE OF DATABASE APPLICATION PROGRAM FRAMEWORK CAPABLE OF ENSURING REAL-TIME EXECUTION PERFORMANCE IN DISTRIBUTED ODBMS AND METHOD FOR EXECUTING THE DATABASE APPLICATION PROGRAM

摘要

PURPOSE: A structure of a database application program framework which can ensure real-time execution performance in the distributed ODBMS(Object-oriented Database Management System) and a method for executing the database application program are provided. CONSTITUTION: An initializing thread(30) carries out a function to make all the objects that the application program of a client side uses among objects in a database(100) of a server side(110) loaded in an object cache(12) through a line L1 at a time. The first master thread(32) updates the objects modified at the server side(110) through database event notification and makes the objects loaded in the object cache(12) maintained in the object cache(12) in the end of work. Work threads(34) carry out the actual work of the application program using objects. The second master thread(36) loads modified objects from the server(110) by executing the first master thread in the end of transaction and carries out work to make the objects loaded in the object cache(12) maintained in the object cache(12).