Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839553
J. Fischer, E. Holz, B. Møller-Pedersen
The decomposition of large systems into parts is a general principle of software design. Even more, in the scope of distributed systems, a partition of the whole system into distributable components is necessary. Decisions about what constitutes a component of a system are usually either based on the behavior or on the structure of the system. Nevertheless, there is a strong mutual influence between both kinds of decomposition. Despite the importance of structural and behavioral decomposition, many modeling notations and languages define the semantics of these concepts rather vaguely, and this may lead to incorrect implementation. This paper presents the new structuring mechanisms in the object-oriented specification and description language SDL-2000. The paper also gives a critical evaluation of these concepts and a comparison with similar approaches in UML (Unified Modeling Language) and ROOM (Real-time Object-Oriented Modeling).
{"title":"Structural and behavioral decomposition in object oriented models","authors":"J. Fischer, E. Holz, B. Møller-Pedersen","doi":"10.1109/ISORC.2000.839553","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839553","url":null,"abstract":"The decomposition of large systems into parts is a general principle of software design. Even more, in the scope of distributed systems, a partition of the whole system into distributable components is necessary. Decisions about what constitutes a component of a system are usually either based on the behavior or on the structure of the system. Nevertheless, there is a strong mutual influence between both kinds of decomposition. Despite the importance of structural and behavioral decomposition, many modeling notations and languages define the semantics of these concepts rather vaguely, and this may lead to incorrect implementation. This paper presents the new structuring mechanisms in the object-oriented specification and description language SDL-2000. The paper also gives a critical evaluation of these concepts and a comparison with similar approaches in UML (Unified Modeling Language) and ROOM (Real-time Object-Oriented Modeling).","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131164599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839508
M. Mock, M. Gergeleit, E. Nett
Object-oriented frameworks have become a key element in the design of distribution systems. They make the existence of the physical and operating system level resources transparent to the designer and provide the abstract view of the distributed systems as a set of objects that interact by invoking well-defined interfaces of each other. Easy reuse of existing components, location transparency and implementation hiding are the main ingredients of such frameworks that simplify the task of designing distributed systems drastically. It is desirable to take advantage of these benefits when designing distributed real-time systems, too. However, this goal conflicts with the essential need to consider the allocation of system resources when real-time requirements must be met. Here, system level resource issues such as execution times on CPUs, thread switches, occurrence of interrupts, and message delays are of primary interest. Our approach to solve this dilemma is to allow and support the designer of distributed real-time object-oriented applications to become aware of system level resources. We present a monitoring tool JewelDC that allows monitoring of distribution activities (i.e. nested sequences of object invocations) in a distributed object-oriented framework. Distributed activities are visualized at the abstract object level while simultaneously revealing their use of system level resources. The tool has been implemented for DCOM on Microsoft Windows NT 4.0.
面向对象框架已经成为配电系统设计中的一个关键元素。它们使物理和操作系统级资源的存在对设计人员透明，并将分布式系统的抽象视图作为一组对象提供，这些对象通过调用彼此定义良好的接口进行交互。易于重用现有组件、位置透明和实现隐藏是这些框架的主要成分，它们极大地简化了设计分布式系统的任务。在设计分布式实时系统时，也需要利用这些优点。然而，当必须满足实时需求时，这个目标与考虑系统资源分配的基本需求相冲突。在这里，系统级资源问题(如cpu上的执行时间、线程切换、中断的发生和消息延迟)是主要关注的问题。我们解决这一困境的方法是允许并支持分布式实时面向对象应用程序的设计者了解系统级资源。我们提出了一个监视工具JewelDC，它允许在分布式面向对象框架中监视分布活动(即嵌套的对象调用序列)。分布式活动在抽象对象级别进行可视化，同时显示它们对系统级资源的使用情况。该工具已在Microsoft Windows NT 4.0上为DCOM实现。
{"title":"Monitoring distributed real-time activities in DCOM","authors":"M. Mock, M. Gergeleit, E. Nett","doi":"10.1109/ISORC.2000.839508","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839508","url":null,"abstract":"Object-oriented frameworks have become a key element in the design of distribution systems. They make the existence of the physical and operating system level resources transparent to the designer and provide the abstract view of the distributed systems as a set of objects that interact by invoking well-defined interfaces of each other. Easy reuse of existing components, location transparency and implementation hiding are the main ingredients of such frameworks that simplify the task of designing distributed systems drastically. It is desirable to take advantage of these benefits when designing distributed real-time systems, too. However, this goal conflicts with the essential need to consider the allocation of system resources when real-time requirements must be met. Here, system level resource issues such as execution times on CPUs, thread switches, occurrence of interrupts, and message delays are of primary interest. Our approach to solve this dilemma is to allow and support the designer of distributed real-time object-oriented applications to become aware of system level resources. We present a monitoring tool JewelDC that allows monitoring of distribution activities (i.e. nested sequences of object invocations) in a distributed object-oriented framework. Distributed activities are visualized at the abstract object level while simultaneously revealing their use of system level resources. The tool has been implemented for DCOM on Microsoft Windows NT 4.0.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125538628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839522
Chanho Ryu, Hyeok Han, Young-Keol Kim, Young-Kuk Kim, Seong-il Jin
Real-time active database systems are systems that need the logical consistency of computation results and the timing constraint. Especially, real-time systems are generally highly interactive with their environment, reacting to stimuli in the environment. And a wealth of active database models has been proposed and several major prototypes have been produced However, no uniform method for specifying the rule and each manager of active database system in design has yet been proposed within the real-time research community: for an example, real-time object model. This paper presents an architecture of an real-time active database system using time-triggered message-triggered object with incorporating active functionality and real-time constraints into an active database kernel in layered architecture. Also this paper shows how real-time objects are designed to a manager as a module of active database and a rule in active database is represented as an object designed to appropriate to real-time active database.
{"title":"Kernel structuring using time-triggered message-triggered objects for real-time active DBMS in layered architecture","authors":"Chanho Ryu, Hyeok Han, Young-Keol Kim, Young-Kuk Kim, Seong-il Jin","doi":"10.1109/ISORC.2000.839522","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839522","url":null,"abstract":"Real-time active database systems are systems that need the logical consistency of computation results and the timing constraint. Especially, real-time systems are generally highly interactive with their environment, reacting to stimuli in the environment. And a wealth of active database models has been proposed and several major prototypes have been produced However, no uniform method for specifying the rule and each manager of active database system in design has yet been proposed within the real-time research community: for an example, real-time object model. This paper presents an architecture of an real-time active database system using time-triggered message-triggered object with incorporating active functionality and real-time constraints into an active database kernel in layered architecture. Also this paper shows how real-time objects are designed to a manager as a module of active database and a rule in active database is represented as an object designed to appropriate to real-time active database.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128356415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839552
M. Saksena, Panagiota Karvelas, Yun Wang
Presents an approach towards the automatic synthesis of implementations from real-time object-oriented design models. From an application design model that addresses the functional requirements of the system, and given end-to-end timing requirements, our synthesis approach generates a feasible implementation model, i.e. one that will meet the timing requirements. The synthesis process is supported by automatic code generation that can take the application design model and the synthesized implementation model, and can generate code for the target platform. The synthesis of an implementation model is facilitated through the use of a generic (application-independent) implementation architecture, thereby reducing the synthesis problem to selecting a mapping of the application design model to the artifacts of the implementation architecture. In this paper, we use a multi-threaded event handling architecture with fixed event priorities. The synthesis problem then consists of determining priorities for events and mapping events to threads. We show how, given such a mapping, the response times can be analyzed, and then how, using the analysis, a feasible implementation model can be automatically synthesized.
{"title":"Automatic synthesis of multi-tasking implementations from real-time object-oriented models","authors":"M. Saksena, Panagiota Karvelas, Yun Wang","doi":"10.1109/ISORC.2000.839552","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839552","url":null,"abstract":"Presents an approach towards the automatic synthesis of implementations from real-time object-oriented design models. From an application design model that addresses the functional requirements of the system, and given end-to-end timing requirements, our synthesis approach generates a feasible implementation model, i.e. one that will meet the timing requirements. The synthesis process is supported by automatic code generation that can take the application design model and the synthesized implementation model, and can generate code for the target platform. The synthesis of an implementation model is facilitated through the use of a generic (application-independent) implementation architecture, thereby reducing the synthesis problem to selecting a mapping of the application design model to the artifacts of the implementation architecture. In this paper, we use a multi-threaded event handling architecture with fixed event priorities. The synthesis problem then consists of determining priorities for events and mapping events to threads. We show how, given such a mapping, the response times can be analyzed, and then how, using the analysis, a feasible implementation model can be automatically synthesized.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133679700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839543
J. Horst
We describe a real-time component-based system for an inspection application. We chose the inspection application and the accompanying task (or scenario) so that we might fully exercise and test our theories about real-time complex systems, system architectures, design methodologies, and software tools. We describe the application, give a history and description of our system architecture and design methodology, describe the real-time software tools we used, and conclude with a discussion of real-time and object-oriented challenges solved.
{"title":"Architecture, design methodology, and component-based tools for a real-time inspection system","authors":"J. Horst","doi":"10.1109/ISORC.2000.839543","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839543","url":null,"abstract":"We describe a real-time component-based system for an inspection application. We chose the inspection application and the accompanying task (or scenario) so that we might fully exercise and test our theories about real-time complex systems, system architectures, design methodologies, and software tools. We describe the application, give a history and description of our system architecture and design methodology, describe the real-time software tools we used, and conclude with a discussion of real-time and object-oriented challenges solved.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114713170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839535
L. Rodrigues, R. Baldoni, E. Anceaume, M. Raynal
A causal ordering protocol ensures that if two messages are causally related and have the same destination, they are delivered to the application in their sending order. Causal order strongly simplifies the development of distributed object oriented systems. To prevent causal order violation, either messages may be forced to wait for messages in their past, or late messages may have to be discarded. For a real time setting, the first approach is not suitable since when a message misses a deadline, all the messages that causally depend on it may also be forced to miss their deadlines. We propose a novel causal ordering abstraction that takes message deadlines into consideration. Two implementations are proposed in the context of multicast and broadcast communication that deliver as many messages as possible to the application. Examples of distributed soft real time applications that benefit from the use of a deadline-constrained causal ordering primitive are given.
{"title":"Deadline-constrained causal order","authors":"L. Rodrigues, R. Baldoni, E. Anceaume, M. Raynal","doi":"10.1109/ISORC.2000.839535","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839535","url":null,"abstract":"A causal ordering protocol ensures that if two messages are causally related and have the same destination, they are delivered to the application in their sending order. Causal order strongly simplifies the development of distributed object oriented systems. To prevent causal order violation, either messages may be forced to wait for messages in their past, or late messages may have to be discarded. For a real time setting, the first approach is not suitable since when a message misses a deadline, all the messages that causally depend on it may also be forced to miss their deadlines. We propose a novel causal ordering abstraction that takes message deadlines into consideration. Two implementations are proposed in the context of multicast and broadcast communication that deliver as many messages as possible to the application. Examples of distributed soft real time applications that benefit from the use of a deadline-constrained causal ordering primitive are given.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127818356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839532
Razvan Jigorea, Sorin Manolache, P. Eles, Zebo Peng
The paper explores aspects concerning system-level specification, modelling and simulation of real time embedded system. By means of case studies, we investigate how object oriented methodologies, and in particular UML, support the modelling of industrial scale real time systems, and how different architectures can be explored by model simulation. We are mainly interested in the problem of system specification as it appears from the prospect of the whole design process. The discussion is illustrated by a large system model from the telecommunications area, the GSM base transceiver station.
{"title":"Modelling of real-time embedded systems in an object-oriented design environment with UML","authors":"Razvan Jigorea, Sorin Manolache, P. Eles, Zebo Peng","doi":"10.1109/ISORC.2000.839532","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839532","url":null,"abstract":"The paper explores aspects concerning system-level specification, modelling and simulation of real time embedded system. By means of case studies, we investigate how object oriented methodologies, and in particular UML, support the modelling of industrial scale real time systems, and how different architectures can be explored by model simulation. We are mainly interested in the problem of system specification as it appears from the prospect of the whole design process. The discussion is illustrated by a large system model from the telecommunications area, the GSM base transceiver station.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129062335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839523
S. Yau, F. Karim
To apply the component-based approach to distributed real-time software development, it is necessary to identify components based on both functional and real-time requirements. Since a component may be acquired from external sources, it becomes necessary during integration to ensure that a component satisfies the real-time requirements of the target application software. Since these requirements vary, customizable so that during integration it can adapt itself to the specific real-time requirements of the target-distributed software. To facilitate such activities, it is preferable to have components that are capable of performing self-customization using a set of built-in services. In this paper, an object-oriented real-time component framework and two built-in customization services are presented to address the specified issues.
{"title":"Component customization for object-oriented distributed real-time software development","authors":"S. Yau, F. Karim","doi":"10.1109/ISORC.2000.839523","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839523","url":null,"abstract":"To apply the component-based approach to distributed real-time software development, it is necessary to identify components based on both functional and real-time requirements. Since a component may be acquired from external sources, it becomes necessary during integration to ensure that a component satisfies the real-time requirements of the target application software. Since these requirements vary, customizable so that during integration it can adapt itself to the specific real-time requirements of the target-distributed software. To facilitate such activities, it is preferable to have components that are capable of performing self-customization using a set of built-in services. In this paper, an object-oriented real-time component framework and two built-in customization services are presented to address the specified issues.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129120252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839515
G. Graw, P. Herrmann, H. Krumm
The Unified Modeling Language UML is well-suited for the design of real-time systems. In particular the design of dynamic system behaviors is supported by interaction diagrams and statecharts. Real-time aspects of behaviors can be described by time constraints. The semantics of the UML, however, is non-formal. In order to enable formal design verification, we therefore propose to complement the UML based design by additional formal models which refine UML diagrams to precise formal models. We apply the formal specification technique cTLA which is based on L. Lamport's Temporal Logic of Actions, TLA. In particular cTLA supports modular definitions of process types and the composition of systems from coupled process instances. Since process composition has superposition character each process system has all of the relevant properties of its constituting processes. Therefore mostly small subsystems are sufficient for the verification of system properties and it is not necessary to use complete and complex formal system models. We present this approach by means of an example and also exemplify the formal verification of its hard real-time properties.
统一建模语言UML非常适合于实时系统的设计。特别是动态系统行为的设计是由交互图和状态图支持的。行为的实时方面可以用时间约束来描述。然而，UML的语义是非正式的。为了实现正式的设计验证，我们因此建议通过附加的正式模型来补充基于UML的设计，这些模型将UML图细化为精确的正式模型。我们采用了基于L. Lamport的动作时间逻辑(Temporal Logic of Actions, TLA)的形式规范技术cTLA。特别地，cTLA支持流程类型的模块化定义，以及来自耦合流程实例的系统组合。由于过程组合具有叠加性，每个过程系统都具有其构成过程的所有相关性质。因此，大多数小的子系统对于系统属性的验证就足够了，没有必要使用完整和复杂的形式化系统模型。我们通过一个实例给出了这种方法，并举例说明了其硬实时性的形式化验证。
{"title":"Verification of UML-based real-time system designs by means of cTLA","authors":"G. Graw, P. Herrmann, H. Krumm","doi":"10.1109/ISORC.2000.839515","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839515","url":null,"abstract":"The Unified Modeling Language UML is well-suited for the design of real-time systems. In particular the design of dynamic system behaviors is supported by interaction diagrams and statecharts. Real-time aspects of behaviors can be described by time constraints. The semantics of the UML, however, is non-formal. In order to enable formal design verification, we therefore propose to complement the UML based design by additional formal models which refine UML diagrams to precise formal models. We apply the formal specification technique cTLA which is based on L. Lamport's Temporal Logic of Actions, TLA. In particular cTLA supports modular definitions of process types and the composition of systems from coupled process instances. Since process composition has superposition character each process system has all of the relevant properties of its constituting processes. Therefore mostly small subsystems are sufficient for the verification of system properties and it is not necessary to use complete and complex formal system models. We present this approach by means of an example and also exemplify the formal verification of its hard real-time properties.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127374281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-03-15DOI: 10.1109/ISORC.2000.839545
P. Pal, J. Loyall, R. Schantz, J. Zinky, R. Shapiro, James Megquier
Recent work in opening up distributed object systems to make them suitable for applications needing quality of service control has had the side effect of increasing the complexity in setting up, configuring, and initializing such applications. Configuration of distributed applications is more complicated than that of non-distributed applications, simply because of the heterogeneous and distributed nature of the application's components. CORBA and other distributed object middleware simplifies the configuration of distributed object applications, but hides much of the information and control necessary to achieve quality of service (QoS). We describe the techniques and tools that we have developed within our Quality Objects (QuO) framework for simplifying the configuration of distributed applications with QoS attributes. We describe a QuO configuration language, as well as the specific configuration needs of particular QoS properties-real-time, security, and dependability-and the support we provide for them.
{"title":"Using QDL to specify QoS aware distributed (QuO) application configuration","authors":"P. Pal, J. Loyall, R. Schantz, J. Zinky, R. Shapiro, James Megquier","doi":"10.1109/ISORC.2000.839545","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839545","url":null,"abstract":"Recent work in opening up distributed object systems to make them suitable for applications needing quality of service control has had the side effect of increasing the complexity in setting up, configuring, and initializing such applications. Configuration of distributed applications is more complicated than that of non-distributed applications, simply because of the heterogeneous and distributed nature of the application's components. CORBA and other distributed object middleware simplifies the configuration of distributed object applications, but hides much of the information and control necessary to achieve quality of service (QoS). We describe the techniques and tools that we have developed within our Quality Objects (QuO) framework for simplifying the configuration of distributed applications with QoS attributes. We describe a QuO configuration language, as well as the specific configuration needs of particular QoS properties-real-time, security, and dependability-and the support we provide for them.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128382044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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