Middleware Support for Dynamic Component Updating

Balasubramanian, Jaiganesh; Natarajan, Balachandran; Schmidt, Douglas C.; Gokhale, Aniruddha; Parsons, Jeff; Deng, Gan

doi:10.1007/11575801_4

Cited by 11 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Examples of other middleware that support some aspects of these capabilities include the Resource Allocation and Control Engine (RACE) [19] and Swap-CIAO [20] for DRE systems, as well as WS-DIAMOND [21] for self-healing web services.…”

Section: Planned Enhancements To Le-dancementioning

confidence: 99%

Efficient and deterministic application deployment in component-based enterprise distributed real-time and embedded systems

Otte

Gokhale

Schmidt

2013

Information and Software Technology

Self Cite

View full text Add to dashboard Cite

Context: Component-based middleware, such as the Lightweight COR-BA Component Model, is increasingly used to implement enterprise distributed real-time and embedded (DRE) systems. In addition to supporting the quality-of-service (QoS) requirements of individual DRE systems, component technologies must also support bounded latencies when effecting deployment changes to DRE systems in response to changing environmental conditions and operational requirements.Objective: The goals of this paper are to (1) study sources of inefficiencies and non-deterministic performance in deployment capabilities for DRE systems and (2) devise solutions to overcome these performance problems.Method: The paper makes two contributions to the study of the deployment and configuration of distributed component based applications. First, we analyze how conventional implementations of the OMG's Deployment and Configuration (D&C) specification for component-based systems can significantly degrade deployment latencies. Second, we describe architectural changes and performance optimizations implemented within the LocalityEnhanced Deployment and Configuration Engine (LE-DAnCE) implementation of the D&C specification to obtain efficient and deterministic deployment latencies.Results: We analyze the performance of LE-DAnCE in the context of component deployments on 10 nodes for a representative DRE system consisting of 1,000 components and in a cluster environment with up to 100 nodes. Our results show LE-DAnCE's optimizations provide a bounded dePreprint submitted to Information and Software Technology July 27, 2012 ployment latency of less than 2 seconds for the 1,000 component scenario with just a 4 percent jitter. Conclusion:The improvements contained in the LE-DAnCE infrastructure provide an efficient and scaleable standards-based deployment system for component-based enterprise DRE systems. In particular, deployment time parallelism can improve deployment latency significantly, both during pre-deployment analysis of the deployment plan and during the process of installing and activating components.

show abstract

Section: Planned Enhancements To Le-dancementioning

confidence: 99%

Efficient and deterministic application deployment in component-based enterprise distributed real-time and embedded systems

Otte

Gokhale

Schmidt

2013

Information and Software Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…To enable this capability at runtime, the following requirements introduced in [77] have to be accomplished:…”

Section: Dynamic Bindingmentioning

confidence: 99%

Model driven development of context aware software systems

Sindico¹,

Grassi²

2009

International Workshop on Context-Oriented Programming - COP '09

View full text Add to dashboard Cite

Since the first computing machine up today, computers have passed from huge rooms of few military and government laboratories to the desks and pockets of common people.In this ever growing process many things have changed and are still changing the way we experience computers in our day by day life. New shapes have made them more comfortable and portable while new technologis have strongly enhanced the way man and machines interacte. Meanwhile, while computers spread out all over the world, new wired and wireless transmission technologies continuously connect them in a world wide network ever surrounding all of us. We are thus quickly moving toward the realization of the Mark Weiser's vision of ubiquitous or pervasive computing, described for the first It is now up to software engineers to introduce standard and structured solutions aimed at filling the gap with this objective. In fact such a new paradigm introduces new problems and challenges never faced before by software technologies, i.e.: resources management in heterogeneous and highly dynamic environments; continuous and dynamic system reconfiguration depending on the kind of the currently available resources; security issues related to the reliability of the available resources; etc.. All these concerns can be summarized in a single capability which ubiquitous pervasive systems should provide: context awareness. Context awareness can be unformally defined as the capability of a system to be cognizant of its users' state and surroundings, and able to modify its behaviors based on these information. Context II awareness is critical for mobile and ubiquitous computing, where devices must adapt their behavior to the current environment. However, despite the fact context is clearly a central notion to an emerging class of applications, there is yet poor explicit support for context awareness in mainstream programming languages and runtime environments; thing that makes the development of these applications more complex than necessary.The lack of accepted standards in context awareness modeling and development is due to the number of issues that still have to be addressed in this new research area. With the aim to provide a contribute toward a major comprehension of the context awareness issues in software engineering, we present a modeling framework that can be used by engineers to model systems' context aware characteristics independently of the possible implementation they could have. Our framework allows the designer to be focused on the information related to the entities involved into the realization of a context aware behaviour making easy to share his/her understanding of such concern with other designers or developers. Moreover our modeling approach is based on aspect oriented modeling techniques so that it is possible to model context aware behaviours for already existing systems without having to modify their original models but only referring to their elements. Models based on this framework can be therefore object of transformation process...

show abstract

“…(2) 在服务内部设定断点、状态收集等,再通过利用 Java 语言反射机制和 JVM 的深入分析实现服务的动态演化.该方法需要对原来的程序做大量工作,同时也很难找到通用的算法来实现批量式转换. 基于 CORBA 的运用已有很长的时间,所以这方面的研究也较多.Tewksbury 等人 [13] 描述了在 Eternal 系统中的 CORBA 应用的更新.他们使用服务器对象的复制来提供在更新期间不被中断的服务.对象被逐个用中间过渡版本更新,这个版本成为新、老版本中间的一个过渡版本.Bidan 等人 [14] 为基于 CORBA 的分布式系统 Aster 描述了一个动态可重配置管理器,提出的更新机制不是要求对象在更新前是被动静止的,而是要求对象之间的连接是处在被动状态的.作者为重配置定义了形式化的一致性和效率的限制,论证了它们的重配置算法是效率优化的.Almeida 等人 [15] 描述了 CORBA 中的动态更新.它们和 Bidan 等人的工作的区别是:(1) 支持重新进入的调用;(2) 支持多个对象的原子更新;(3) 使用 ORB 扩展了的比较大的透明性.Balasubramanian [16] 通过在中间件平台 SwapCIAO 上扩展轻量级 CORBA 组件模型的服务功能来实现组件的动态更新,解决一个物流帐目清单跟踪系统(ITS)的组件动态更新功能,但其动态更新机制相对简单.…”

Section: Osgi服务动态更新unclassified

Dynamic Service Evolving Based on OSGi

Shi¹

2008

Journal of Software

View full text Add to dashboard Cite

Abstract:A method is proposed in this paper for resolving dynamic service evolving based on OSGi. First, use indirect method for updating service definition based-on OSGi. The method can make dynamic evolving transparent.Then, divide service definition into implementation and data, which makes fields in service instance consistent and evolvable. The adding/deleting service during evolving is also discussed. A project is implemented, which can direct how to design, execute and evolve updatable service. The methods mentioned in the paper may be helpful to evolving components, service and object-oriented software.

show abstract

Middleware Support for Dynamic Component Updating

Cited by 11 publications

References 16 publications

Efficient and deterministic application deployment in component-based enterprise distributed real-time and embedded systems

Efficient and deterministic application deployment in component-based enterprise distributed real-time and embedded systems

Model driven development of context aware software systems

Dynamic Service Evolving Based on OSGi

Contact Info

Product

Resources

About