Making CORBA Objects Persistent: the Object Database Adapter Approach

This paper discusses a realization of object persistence in a CORBA-based distributed system. In our approach, persistence of CORBA objects is accomplished by the integration of the ORB with an ODBMS. This approach is not limited to pure object-oriented database systems, as the ODBMS may be a combination of a relational DBMS and an object-relational mapper. The design and implementation of an Object Database Adapter that integrates an ORB and an ODBMS with C++ bindings is presented. The ODA uses delegation (rather than inheritance) to connect user-provided implementation classes and IDL-generated classes. Only the user-defined parts of CORBA objects are actually stored in a database. Their IDL-generated parts are dynamically instantiated, in transient memory, by the ODA. Persistent relationships between CORBA objects within a server are not realized at the CORBA level, but at the level of implementation objects. Database traversals and queries can therefore be executed at ODBMS speed...

• Type: Conference
• Year: 1997
• Where: COOTS
• Authors: Francisco C. R. Reverbel, Arthur B. Maccabe
• Keywords: COOTS 1997, COOTS 2001, CORBA Objects, ODA Uses Delegation, ODBMS