A Dual Programming Model for Distributed Real-Time Java

Abstract

More-and-more, the use of Java as a programming language for real-time applications is becoming of interest in industrial middleware. This is mainly because it offers advantages for the programmer as reduced deployment times, increased portability, and a number of APIs that may be integrated in large distributed applications. This paper contributes a dual communication model for distributed real-time Java applications. Current efforts in distributed real-time Java [e.g., The Distributed Real Time Specification for Java (DRTSJ)] are mainly focused on remote invocations (R.I.) and set aside other valuable approaches such as distributed events. The proposed model offers two choices for developing distributed real-time Java applications (one based on R.I., and another on distributed events), which may be used to develop applications. Both models include an additional support for asynchronism in communications, a feature that may speed up their communication performance. This paper includes a description for the two models, the changes that are required in the current API to accommodate them, and an empirical evaluation of their performance on a reference implementation.

Composing and scheduling service‐oriented applications in time‐triggered distributed real‐time Java environments

“…The research presented in this paper allows the development of real-time service-based applications in time-triggered distributed real-time Java and shows the benefits from using our heuristic composition algorithm when selecting and scheduling the service agents that will compose an application. We intend to implement the schedulability analysis and composition algorithms presented in this paper within the distributed real-time Java middleware [7,8,81,82] using the synchronous scheduling service and the application of real-time service-based applications to RT-OSGI [83,84]. We also intend to apply this research within the iLAND middleware [14,18].…”

“…COMPOSING AND SCHEDULING TT-DISTRIBUTED RT-JAVA SOAS 153 used by distributed real-time applications, such as the concept of connection-pool, memory-pool and thread-pool or the usage of a distributed garbage collector, defining a dual programming model that allows the choice of between a development based on remote invocation or based on distributed events [7][8][9]. Service-oriented paradigms have been successfully applied to distributed environments, increasing their flexibility and allowing the reusability of their components.…”

“…We intend to implement the schedulability analysis and composition algorithms presented in this paper within the distributed real-time Java middleware [7,8,81, 82] using the synchronous scheduling service and the application of real-time service-based applications to RT-OSGI [83,84]. We intend to implement the schedulability analysis and composition algorithms presented in this paper within the distributed real-time Java middleware [7,8,81, 82] using the synchronous scheduling service and the application of real-time service-based applications to RT-OSGI [83,84].…”

“…Besides, distributed real-time Java technologies have shown to be a good candidate to deploy real-time distributed applications. This paper presents a model for service-oriented applications on a time-triggered distributed real-time Java environment, focusing on the definition of the temporal model of an application and its schedulability, applying and evaluating this model in real-time service-oriented composition algorithms.COMPOSING AND SCHEDULING TT-DISTRIBUTED RT-JAVA SOAS 153 used by distributed real-time applications, such as the concept of connection-pool, memory-pool and thread-pool or the usage of a distributed garbage collector, defining a dual programming model that allows the choice of between a development based on remote invocation or based on distributed events [7][8][9]. DREQUIEMI also includes a synchronous scheduling service [10] that allows the establishment of a common temporal axis for a distributed application.This work aims to give the basis to design and develop a service-oriented application in a distributed real-time Java environment.…”

JDAS: a software development framework for multidatabases

“…Connection pools can reduce the waiting time of a connection and resource overhead when CRUD operations are executed . Many connection pool technologies (e.g., DBCP and C3P0) implement the j a v a x .…”