Compadres: A Lightweight Component Middleware Framework for Composing Distributed Real-Time Embedded Systems with Real-Time Java

Hu, Jie; Gorappa, Shruti; Colmenares, Juan A.; Klefstad, R.

doi:10.1007/978-3-540-76778-7_3

Cited by 10 publications

(7 citation statements)

References 12 publications

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“…Compadres [11], one of the most recent projects, proposes a component framework for distributed real-time embedded systems. A hierarchical component model where each component is allocated either in a scoped or immortal memory is proposed.…”

Section: Related Workmentioning

confidence: 99%

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A Real-Time Java Component Model

Plsek¹,

Merle²,

Seinturier³

2008

2008 11th IEEE International Symposium on Object and Component-Oriented Real-Time Distributed Computing (ISORC)

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The Real-Time Specification for Java (RTSJ) [10] is becoming a popular choice in the world of real-time programming. However, the complexities introduced by RTSJ bring the needs for an extensive framework comprising all the aspects of RTSJ development. As the first contribution of this paper, we present a real-time component model directly fitting the needs of RTSJ. Our motivation is to clearly separate real-time and business concerns of applications. We further argue that the RTSJ concerns need to be considered at early stages of architecture design in order to mitigate the complexities of the implementation phase. Therefore, as our second contribution, we propose a design process introducing gradually RTSJ concepts into the architecture. We are thus able to alleviate the development of real-time systems and to tailor them for different real-time conditions. Finally, we demonstrate the feasibility of our solution on an example scenario.

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Section: Related Workmentioning

confidence: 99%

“…One of the answers to these issues are componentoriented frameworks for RTSJ, such as [11,9,7]. The basic motivation lays in abstracting complexities of the RTSJ development from the developers.…”

Section: Introductionmentioning

confidence: 99%

A Real-Time Java Component Model

Plsek¹,

Merle²,

Seinturier³

2008

2008 11th IEEE International Symposium on Object and Component-Oriented Real-Time Distributed Computing (ISORC)

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show abstract

“…One of the answers to these issues are component-oriented frameworks for RTSJ, such as [10,12,14], abstracting complexities of the RTSJ development from the developers. Nevertheless, the state-of-the-art solutions still need to fully address adaptability issues of real-time systems, separation of real-time and functional concerns, and suffer from the absence of a high-level process that would introduce real-time concerns during the design phase.…”

Section: Current Trends and Challengesmentioning

confidence: 99%

“…Apart from these few frameworks, other projects are recently emerging with features similar to our work. Compadres [14], one of the most recent projects, proposes a component framework for distributed real-time embedded systems. A hierarchical component model where each component is allocated either in a scoped or immortal memory is designed.…”

Section: Related Workmentioning

confidence: 99%

A Component Framework for Java-Based Real-Time Embedded Systems

et al. 2008

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Abstract. The Real-Time Specification for Java (RTSJ) [13] is becoming a popular choice in the world of real-time and embedded programming. However, RTSJ introduces many non-intuitive rules and restrictions which prevent its wide adoption. Moreover, current state-of-the-art frameworks usually fail to alleviate the development process into higher layers of the software development life-cycle. In this paper we extend our philosophy that RTSJ concepts need to be considered at early stages of software development, postulated in our prior work [2], in a framework that provides continuum between the design and implementation process. A component model designed specially for RTSJ serves here as a cornerstone. As the first contribution of this work, we propose a development process where RTSJ concepts are manipulated independently of functional aspects. Second, we mitigate complexities of RTSJ-development by automatically generating execution infrastructure where real-time concerns are transparently managed. We thus allow developers to create systems for variously constrained real-time and embedded environments. Performed benchmarks show that the overhead of the framework is minimal in comparison to manually written object-oriented applications, while providing more extensive functionality. Finally, the framework is designed with the stress on dynamic adaptability of target systems, a property we envisage as a fundamental in an upcoming era of massively developed real-time systems.

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“…While components are pre-coded software modules that provide a specific function, design patterns [2,26] are abstract representations for software are often need to be reified with each application. The real-time Java CORBA middleware, ZEN [3], Compadres [9], and the ACE-based web server, JAWS [10,25], are examples of frameworks that are built using middleware design patterns. From our experience building DRE middleware, we have found that component-and patternbased middleware improves the quality and maintainability of software and reduces application development time.…”

Section: Introductionmentioning

confidence: 99%

Performance prediction of component- and pattern-based middleware for distributed systems

Gorappa

2007

Proceedings of the 4th on Middleware Doctoral Symposium

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Design patterns, components, and frameworks have been successfully used to build various distributed real-time, and embedded (DRE) systems such as high-performance servers, telecommunication systems, and control systems. An application developer may choose from several approaches to implement a distributed application and the choice of design patterns and their configuration can impact the overall performance of the system. Unlike components, design patterns are often descriptions of a programming approach and need to be reified for each application. However, some core pattern implementations can often be reused across applications, if they can be correctly configured to meet application requirements. Currently, there is no general way to quantify the performance of components and design pattern implementations across various dimensions such as throughput, response time, and scalability. The overall performance of applications that are composed from pre-coded components and patterns can be inferred using analytical techniques by modeling the behavior of the individual components. In particular, while we know from experience that patterns exhibit various tradeoffs in terms of performance and complexity; we would like to explore these tradeoffs in a formal way. Toward this goal, we make the following contributions in this thesis: 1) we develop analytical models for various design patterns using queuing models, 2) we present a technique to analyze the performance of combinations of design patterns as observed in real-world applications, and 3) we validate the models using empirical measurements.

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Compadres: A Lightweight Component Middleware Framework for Composing Distributed Real-Time Embedded Systems with Real-Time Java

Cited by 10 publications

References 12 publications

A Real-Time Java Component Model

A Real-Time Java Component Model

A Component Framework for Java-Based Real-Time Embedded Systems

Performance prediction of component- and pattern-based middleware for distributed systems

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