Object-Relational event (ORE) middleware for push-based content delivery from the application tier

摘要

Object-Relational Mapping (ORM) is often used between tiers in a Web-based system to automate the persistence of data to secondary storage. ORMs work by transparently providing developers with an object-oriented representation of some view of the tables in a database. Although the ORM approach is beneficial, it is not easy for a developer to integrate push-style development into object-relational model. In this project, we investigate an event-driven style of programming where developers could register for notification of updates to specific properties of ORM mapped objects. A key challenge in this context is maintaining consistency between the state of the objects of the ORM and the high-level event registration abstractions exposed to programmers. We use a running example from the RubiS web application benchmark example as evaluation to demonstrate the performance implications of the approach.