14 research outputs found

    Przezroczysta integracja zasob贸w relacyjnych do obiektowego wirtualnego repozytorium

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    Prezentowana w artykule idea polega na wirtualnej integracji rozproszonych heterogenicznych zasob贸w bazodanowych w scentralizowan膮, jednorodn膮, sp贸jn膮 i pozbawion膮 fragmentacji oraz nadmiarowo艣ci ca艂o艣膰 tworz膮c膮 wirtualne repozytorium zapewniaj膮ce pewne powszechne funkcjonalno艣ci i us艂ugi, w艂膮czaj膮c w to infrastruktur臋 zaufania (bezpiecze艅stwo, prywatno艣膰, licencjonowanie, p艂atno艣ci, itp.), Web Services, rozproszone transakcje, zarz膮dzanie procesami (workflow management), itd. Opisane poni偶ej metody integracji skupiaj膮 si臋 w艂a艣nie na najpopularniejszych zasobach relacyjnych, do kt贸rych zostaje umo偶liwiony w pe艂ni przezroczysty dost臋p poprzez niezwykle elastyczny obiektowy j臋zyk zapyta艅. Opracowane specjalnie do tego celu mechanizmy optymalizacyjne stanowi膮 kombinacj臋 dedykowanych technik obiektowych z niezwykle wydajnymi optymalizatorami relacyjnymi.The presented idea aims to virtually integrate distributed heterogeneous database resources into a centralised consistent and non-fragmented and non-redundant whole creating a virtual repository. The repository provides common functionalities and services, including trust infrastructure (like security, privacy, licensing, payments), Web Services, distributed transactions, workflow management, etc. The described integration methods focus on the most popular and commonly used relational resources. Such resources become fully transparently accessible with an extremely flexible object-oriented query language. The dedicated optimisation mechanisms are a combination of object-oriented techni膮ues and very efficient relational optimisers

    Semiautomatic generation of CORBA interfaces for databases in molecular biology

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    The amount and complexity of genome related data is growing quickly. This highly interrelated data is distributed at many different sites, stored in numerous different formats, and maintained by independent data providers. CORBA, the industry standard for distributed computing, offers the opportunity to make implementation differences and distribution transparent and thereby helps to combine disparate data sources and application programs. In this thesis, the different aspects of CORBA access to molecular biology data are examined in detail. The work is motivated by a concrete application for distributed genome maps. Then, the different design issues relevant to the implementation of CORBA access layers are surveyed and evaluated. The most important of these issues is the question of how to represent data in a CORBA environment using the interface definition language IDL. Different representations have different advantages and disadvantages and the best representation is highly application specific. It is therefore in general impossible to generate a CORBA wrapper automatically for a given database. On the other hand, coding a server for each application manually is tedious and error prone. Therefore, a method is presented for the semiautomatic generation of CORBA wrappers for relational databases. A declarative language is described, which is used to specify the mapping between relations and IDL constructs. Using a set of such mapping rules, a CORBA server can be generated automatically. Additionally, the declarative mapping language allows for the support of ad-hoc queries, which are based on the IDL definitions

    Preface of the Proceedings of WRAP 2004

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    WISM'07 : 4th international workshop on web information systems modeling

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    WISM'07 : 4th international workshop on web information systems modeling

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    Preface of the Proceedings of WRAP 2004

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