This paper proposes a new technique called CORBAas-needed to improve the performance of distributed CORBA applications. CORBA-as-needed allows distributed CORBA applications to first detect if the interoperability functionality of CORBA communication methods are indeed needed in a particular invocation, and bypass them if this functionality is not needed for that invocation. The paper describes...

This paper is focused on the performance analysis, comparison and optimization of distributed object middleware for Java 2: RMI (Remote Method Invocation), CORBA IDL (Interface Definition Language) and RMI-IIOP (Remote Method Invocation on Internet Inter-ORB Protocol). The paper presents the following contributions to the research on distributed object performance. First, a detailed performance...

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document defines a framework for transcoding with SIP. This framework includes how to discover the need for transcoding services in a session and how to invoke those transcoding services. Two models for transco...

This paper considers the use of transaction processing systems in manufacturing applications. It is part of the ConTract project at Stuttgart University, which explores techniques to extend transaction technology into areas of long-lived, interacting applications. We will focus on two aspects: First, we will describe a transaction-oriented invocation protocol between a control computer and a ph...

Distributed programming can be greatly simplified by language support for distributed communication, such as that provided by remote procedure call (RPC) or remote object invocation. This paper examines design and implementation issues in these systems, and focuses on the influence of the communication system on a distributed program. To make the discussion concrete, we introduce a single appli...

This paper describes the rationale and design of a new distributed systems programming model based on events, constraints, and objects. The paper describes the inter-object communication or invocation mechanism, and the way in which concurrency, synchronisation, and timing properties are expressed and controlled. The invocation mechanism is unusual in that it is event-based. It encourages loose...

The present paper compares interaction and communication mechanisms used in distributed control systems, focusing on object-oriented and component-based development. The standard communication model used in distributed object-oriented systems is the remote method invocation. We argue that this client/server oriented model has some severe drawbacks when used in a control system where objects may...

tüe believe that access controls for object-oriented systems should be fine-grained and thus apply to individual methods of individual objects. The efficient support of fine-grained access control is challenging because a check is done on every method invo-cation. rüe present a design that uses access control lists (ACLs) and exploits virtual memory facilities to make these checks run fast. The...

The need for translation during the dynamic invocation of services described on the semantic web is not addressed merely by introducing middle agents to translate messages. When an agent is attempting to utilize a service discovered and described on the Semantic Web using a service language like OWL-S, it must be able to translate descriptions of required inputs, given in terms from the ontolog...

The reliable object invocation mechanism provided by HIDRA for the coordinator-cohort and the passive replication models offers support to ensure that all the replicas of the object being invoked are correctly updated before such an invocation is terminated. This mechanism also ensures that if a primary or coordinator replica crashes, the client is able to reconnect to the previously initiated ...