Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32最新文献_第2页

Aggregation from multiple perspectives by roles 按角色从多个角度进行聚合

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809421

Lars Kirkegaard Bækdal, B. B. Kristensen

引用次数: 4

Architecture=abstractions over software 架构=对软件的抽象

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809417

E. E. Jacobsen, B. B. Kristensen, P. Nowack

引用次数: 12

Classifying component interaction in product-line architectures 对产品线架构中的组件交互进行分类

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809415

B. Jørgensen, W. Joosen

引用次数: 4

Constructing interoperable components in distributed systems 在分布式系统中构建可互操作的组件

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809432

Sea Ling, H. Schmidt, R. Fletcher

{"title":"Constructing interoperable components in distributed systems","authors":"Sea Ling, H. Schmidt, R. Fletcher","doi":"10.1109/TOOLS.1999.809432","DOIUrl":"https://doi.org/10.1109/TOOLS.1999.809432","url":null,"abstract":"The separation of architecture definition language (ADL) and interface definition language (IDL) is widely accepted in the distributed system community. It separates issues of hierarchical composition and configuration from those of services, communication and synchronisation and thus eases reconfiguration without changing the interfaces and implementation and allows the change of services within well-defined configuration constraints. Our approach towards distributed system definition draws on the Darwin project's notion of distributed system architecture definition and on Eiffel's notion of design-by-contract. We extend contracts to deal with synchronisation and coordination at a higher level, explicitly targeting both large-scale loosely-coupled distributed components and tightly coupled parallel or multithreaded objects. In this paper we present a Java binding of the resulting contract extensions. We incorporate annotations into Java programs adding Eiffel-style assertions and other contractual constraints. Java component code and constraints are then associated to architectural diagrams in a visual programming environment. The paper illustrates the language features in a case study of a lift control system. Based on the case study, the component-based design approach is illustrated and the internal synchronisation of method execution is explained.","PeriodicalId":272695,"journal":{"name":"Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121091344","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}

引用次数: 12

Towards perfect objects 走向完美的物体

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809419

Hongxue Wang, V. Varadharajan, J. Slaney

引用次数: 0

On creation, equality and the object model 论创建、相等性和对象模型

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809427

Michael Kölling, J. Rosenberg

引用次数: 2

Integrating UML and algebraic specification techniques 集成UML和代数规范技术

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809422

L. Favre, S. Clerici

引用次数: 8

Design and evolution of software architecture in practice 软件架构在实践中的设计与演进

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809410

Michael Christensen, C. H. Damm, K. M. Hansen, Elmer Sandvad, Michael Thomsen

{"title":"Design and evolution of software architecture in practice","authors":"Michael Christensen, C. H. Damm, K. M. Hansen, Elmer Sandvad, Michael Thomsen","doi":"10.1109/TOOLS.1999.809410","DOIUrl":"https://doi.org/10.1109/TOOLS.1999.809410","url":null,"abstract":"With special focus on software architectural issues, we report from the first two major phases of a software development project. Our experience suggests that explicit focus on software architecture in these phases was an important key to success. More specifically: Demands for stability, flexibility and proper work organisation in an initial prototyping phase of a project are facilitated by having an explicit architecture. However, the architecture should also allow for certain degrees of freedom for experimentation. Furthermore, in a following evolutionary development phase, architectural redesign is necessary and should be firmly based on experience gained from working within the prototype architecture. Finally, to get it right, the architecture needs to be prototyped, or iterated upon, throughout evolutionary development cycles. In this architectural prototyping process, we address the difficult issue of identifying and evolving functional components in the architecture and point to an architectural strategy a set of architectures, their context and evolution-that was helpful in this respect.","PeriodicalId":272695,"journal":{"name":"Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124537808","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}

引用次数: 7

Dynamic geospatial image mosaics using JAVA, JAI, RMI and CORBA 使用JAVA, JAI, RMI和CORBA的动态地理空间图像拼接

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809430

J. Hildebrandt, R. Hollamby

{"title":"Dynamic geospatial image mosaics using JAVA, JAI, RMI and CORBA","authors":"J. Hildebrandt, R. Hollamby","doi":"10.1109/TOOLS.1999.809430","DOIUrl":"https://doi.org/10.1109/TOOLS.1999.809430","url":null,"abstract":"Command Control, Computers, Communications, Intelligence, and Surveillance (C4ISR) systems make extensive use of geospatial and image based information. Map displays and aerial photography are often used as the backdrop for the display of other information in systems to assist in providing situation awareness. Given the desire to have high-resolution information, the volume and variety of geospatial information is increasing. Both commercial and experimental systems are being developed to manage, serve and process these large volumes of image and geospatial information. This paper describes the development of a dynamic server that communicates with an experimental CORBA based backend image repository, and to a JAVA map display client to deliver a virtual mosaic of the imagery within the displayed region. Since imagery is not always stored in georeferenced form we have had to provide a processing chain that maps the image coordinates to the map coordinates for display. This is implemented using the JAVA Advanced imaging library. To reduce the footprint of the client the dynamic server that processes the imagery from the backend repository can be distributed off of the client system via an RMI connection. To maximise the interactive performance of this application various types of caching of queries and image data have been implemented.","PeriodicalId":272695,"journal":{"name":"Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32","volume":"56 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114050725","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}

引用次数: 0

Extending a method of devising software contracts 扩展了一种设计软件契约的方法

Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32 Pub Date : 1999-11-22 DOI: 10.1109/TOOLS.1999.809429

R. Mitchell, J. McKim

{"title":"Extending a method of devising software contracts","authors":"R. Mitchell, J. McKim","doi":"10.1109/TOOLS.1999.809429","DOIUrl":"https://doi.org/10.1109/TOOLS.1999.809429","url":null,"abstract":"Classes in object-oriented programs can be specified using assertions, specifically, preconditions and postconditions on individual methods and invariants on whole classes. Such assertions can be seen as forming a contract between a class and its client classes and, by extension, between the developers of class and the developers of client classes. In some programming environments, the contracts can be checked at runtime. A published method of devising contracts is applied to a small framework based on the observer pattern, raising a number of problems of writing contracts for a set of collaborating classes, rather than for individual classes such as those formed in data structure libraries. As well as providing an example of tackling such problems, the paper identifies desirable extensions to the method of devising contracts, to address aspects of performance (keeping the run-time cost of evaluating preconditions low); privacy (ensuring that one client of a class cannot discover the identities of other clients); extensibility (allowing subclasses to weaken preconditions without invalidating existing postconditions, and allowing subclasses to adopt different frame rules); and kinds of constraints (distinguishing physical and logical constraints).","PeriodicalId":272695,"journal":{"name":"Proceedings Technology of Object-Oriented Languages and Systems. TOOLS 32","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127642990","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}

引用次数: 6