Design and Implementation of CORBA-Based Subscription Server

The standard CORBA operation invocation model supports synchronous, one-way, and deferred synchronous interactions between clients and servers. However, this model is too restrictive for real-time applications. In particular, the model lacks asynchronous message delivery, does not support timed invocations or group communication, and can lead to excessive polling by clients. In this paper, we have designed and implemented a subscription server based on the OMG Notification Service specification for the structured push style communication. In order to alleviate some of the restrictions with the standard CORBA invocation model, the Subscription Server supports asynchronous message delivery and allows one or more suppliers to send structured messages to one or more consumers. Event data can be delivered from suppliers to consumers without requiring these participants to know about each other explicitly. In addition to implementing most of the interfaces defined in the specification, the ...

• Type: Conference
• Year: 2000
• Where: TOOLS
• Authors: R. Maheshwari, R. Fatoohi
• Keywords: Asynchronous Message Delivery, Invocation Model, Programming Languages, Subscription Server, TOOLS 2000