CORBA Components Collocation Optimization Enhanced with Local ORB-Like Services Support

Abstract

Some current implementations of CORBA Component Model (CCM) are flawed with unreasonable communication overheads when components are in the same address space and in the same container. Alternative approaches have introduced mechanisms for direct local communication of such components. In these approaches collocated components do not communicate through ORB and therefore cannot use ORB services such as events, naming and transactions locally, unless they are programmed explicitly. This paper presents a new approach for communication of collocated components with local ORB-like services support. A unit inside each container is responsible for handling communication between components within or outside the container. Local requests are passed to the local components without ORB involvement. Local or remoteness of a request is determined from the IOR of the called component which has been logged by the relevant special unit upon the creation of the component in its container. Implementation results of our approach show a considerable reduction of local communication overheads.