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Parametric polymorphism for software component architectures

ACM SIGPLAN NOTICES 2005年第10期40卷 147-166页

作者： Oancea, CE Watt, SM Univ Western Ontario Dept Comp Sci London ON Canada

Parametric polymorphism has become a common feature of mainstream programming languages, but software component architectures have lagged behind and do not support it. We examine the problem of providing parametric polymorphism with components combined from different programming languages. We have investigated how to resolve different binding times and parametrization semantics in a range of representative languages and have identified a common ground that can be suitably mapped to different language bindings. We present a generic component architecture extension that provides support for parameterized components and that can be easily adapted to work oil top of various software component architectures in use today (e.g., CORBA, DCOM, JNI). We have implemented and tested this architecture on top Of CORBA. We also present Generic Interface Definition Language (GIDL), an extension to CORBA-IDL supporting generic types and we describe language bindings for C++, Java and Aldor. We explain our implementation of GIDL, consisting of a GIDL to IDL compiler and tools for generating linkage code under the language bindings. We demonstrate how this architecture can be used to access C++'s STL, and Aldor's BasicMath libraries in a multi-language environment and discuss our mappings in the context of automatic library interface generation.

关键词： languages design antiunification generics parametric polymorphisrn software component architecture templates

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Taming complexity in high-performance computing

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MATHEMATICS AND COMPUTERS IN SIMULATION 2000年第4-5期54卷 341-357页

作者： Oldehoeft, R Univ Calif Los Alamos Natl Lab Adv Comp Lab Los Alamos NM 87545 USA

Today's high-performance computing environments, and the applications that must exploit them, have become much more complex than ever. We now build ensembles of large, shared-memory parallel computers, linked together with high-speed networks, in an attempt to achieve previously unheard-of speeds and still retain a 'general-purpose' capability for running diverse applications. Demands for greater precision and realism in today's computer simulations of physical phenomena tax the imagination of the most aggressive system designers. Enhancing the accuracy of tomorrow's simulations requires simultaneously accounting for more physical, chemical and biological components. Predictive simulation is essential for making informed, science-based decisions on questions of;national importance, including stockpile stewardship, global climate change, wild-fires, earthquakes and epidemics. These applications are too massive and inter-related to be built, verified, tuned and maintained by conventional methods. software teams in the Advanced Computing Laboratory (ACL) at Los Alamos National Laboratory, along with collaborators world-wide, are building an integrated software infrastructure for scientific simulation development. This paper describes the ACL projects now underway in object-oriented frameworks, scalable run-time software, scientific visualization, software component architecture, and high-end and experimental computer systems. We include achieved results and the status of projects. Published by Elsevier Science B.V. on behalf of IMACS.

关键词： high-performance computing object-orientated frameworks run-time systems scientific visualization software component architecture Linux clusters

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An architecture for generic extensions

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SCIENCE OF COMPUTER PROGRAMMING 2011年第4期76卷 258-277页

作者： Oancea, Cosmin E. Watt, Stephen M. Texas A&M Univ Dept Comp Sci & Engn College Stn TX 77843 USA Univ Western Ontario Dept Comp Sci London ON N6A 5B7 Canada

We examine what is necessary to allow generic libraries to be used naturally in a multi-language, potentially distributed environment. Language-neutral library interfaces usually do not support the full range of programming idioms that are available when a library is used natively. We investigate how to structure the language bindings of the neutral interface to achieve a better expressibility and code re-use. We furthermore address how language-neutral interfaces can be extended with import bindings to recover the desired programming idioms. We also address the question of how these extensions can be organized to minimize the performance overhead that arises from using objects in manners not anticipated by the original library designers. Our approach is to treat a library as a software component and to view the problem as one of component extension. We use C++ as an example of a mature language, with libraries using a variety of patterns, and use the Standard Template Library as an example of a complex library for which efficiency is important. By viewing the library extension problem as one of component organization, we enhance software composibility, hierarchy maintenance and architecture independence. (c) 2009 Elsevier B.V. All rights reserved.

关键词： Generics C plus plus templates software component architecture Middleware Curiously reoccurring template pattern (CRTP) Type members

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Unattended Ground Sensors Standards Working Group: Transforming the unattended sensor paradigm

Unattended Ground Sensors Standards Working Group: Transform...

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Conference on Ground/Air Multisensor Interoperability, Integration and Networking for Persistent ISR III

作者： Heathcock, Robert Brasch, Colson Def Intelligence Agcy Bldg 6000200 MacDill Blvd Washington DC 20340 USA Mitre Corp Mclean VA 22102 USA

ISBN: (纸本)9780819490674

The FY 10-15 Defense Intelligence Guidance (DIG) issued by the Under Secretary of Defense for Intelligence (USDI) tasked the Defense Intelligence Agency (DIA) to generate an Unattended Ground Sensors (UGS) roadmap. The roadmap was intended to encapsulate a broad understanding of ongoing and planned UGS development and deployment activities across the Department of Defense (DoD). This understanding supports an evolution to a cross-DoD and intelligence community (IC) integrated approach for acquiring and fielding UGS. To further this approach, a memorandum signed by the Deputy Under Secretary of Defense for Technical Collection & Analysis endorsed the creation of an UGS Standards Working Group (SWG)(1). The UGS SWG is working across the defense community via its newly established Technology Focus Groups (TFGs) to address the specifics of the open architecture standards for unattended sensors (OASUS). Derived from the Terra Harvest-developed, open, integrated battlefield UGS architecture, OASUS separates the UGS system into fundamental components and standardizes internal and external interfaces to optimize interoperability. The TFGs are looking specifically at software component architecture, wired and wireless interfaces, and physical and logical user interfaces. This paper details the progress of these focus group efforts and invites participation in ongoing development of unattended sensor standards that advance the technology beyond the familiar pattern of controller, trigger, and camera.

关键词： activity-based intelligence common lexicon forge.mil OASUS plug-and-play software component architecture technology focus groups UGS unattended sensor user interfaces wired and wireless interfaces

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Terra Harvest: Intelligence, surveillance, and reconnaissance force multiplier

Terra Harvest: Intelligence, surveillance, and reconnaissanc...

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Conference on Ground/Air Multisensor Interoperability, Integration and Networking for Persistent ISR III

作者： Heathcock, Robert Brasch, Colson Def Intelligence Agcy Bldg 6000200 MacDill Blvd Washington DC 20340 USA Mitre Corp 7525 Colshire Dr Mclean VA 22102 USA

ISBN: (纸本)9780819490674

The Defense Intelligence Agency's Terra Harvest program, launched in 2009, is developing an open, integrated battlefield unattended ground sensors (UGS) architecture that ensures interoperability among disparate UGS components and systems. Having successfully demonstrated a Terra Harvest-compliant UGS controller at Empire Challenge 2010, the program has since developed a Terra Harvest open architecture specification and developer's guide;created a web-based forum for architecture evolution and industry collaboration;and developed an array of asset plug-ins. These software plug-ins send data to or acquire it from an asset, and then convert it into a viable payload capable of supporting intelligence-driven operations. Building on this foundation, commercial vendors are developing field-ready implementations for Trident Spectre 2012. Once fully matured, Terra Harvest will streamline acquisition processes, reduce deployment timelines, and serve users as an intelligence, surveillance, and reconnaissance (ISR) force multiplier.

关键词： acquisition activity-based intelligence Army Research Laboratory assets communications Defense Intelligence Agency flexibility interoperability ISR plug-ins software component architecture Terra Harvest Trident Spectre unattended ground sensor user interfaces wired/wireless interfaces

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