Enhancing OSGi with real‐time Java support

Val, Pablo Basanta; García-Valls, Marisol; Estévez-Ayres, Iria

doi:10.1002/spe.2101

Cited by 8 publications

(2 citation statements)

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“…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].…”

Section: Discussionmentioning

confidence: 99%

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

Estévez-Ayres

Val

García-Valls

2012

Concurrency and Computation

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During the last decade, the number of distributed application domains with temporal requirements has significantly augmented, arising the necessity of exploring new concepts and paradigms that allow, on the one hand, the development of dynamic and flexible distributed applications and, on the other hand, the reusability of code. Service-oriented paradigms have been successfully applied to distributed environments, increasing their flexibility and allowing the reusability of their components. 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. The support given by the synchronous scheduling service over DREQUIEMI for real-time coordination between entities within the system (allowing the coordination between services within an application) and between the system and external actions (allowing the system to interact with sensors and actuators or the cooperation between different autonomous applications) makes it a good candidate for supporting real-time service-based applications. This service is based on a time-triggered communications paradigm and also supports asynchronous traffic, with temporal isolation, needed for the communication of events between different entities of a real-time service-based distributed system.This RTRMI middleware will be used as underlying platform in a real-time service-based system. In a real-time service-based architecture, the underlying paradigm (RMI or any other) should be transparent from the point of view of the application programmer, so she only needs to be aware of the abstract notion of a service and of the desired behaviour and quality of service (QoS) of an application. The system is, then, in charge of building loosely coupled communications (one of the main characteristics of a service-based approach) on top of the given underlying platform. This is achieved by the definition of suitable architectures [11][12][13][14] and translation rules between application and communication concepts (as the presented in Section 4.2.1).When composing real-time service-oriented ...

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Section: Discussionmentioning

confidence: 99%

“…We intend to implement the schedulability analysis and composition algorithms presented in this paper within the distributed real‐time Java middleware using the synchronous scheduling service and the application of real‐time service‐based applications to RT‐OSGI . We also intend to apply this research within the iLAND middleware .…”

Section: Discussionmentioning

confidence: 99%