Tai yra verslas verslui užsakymų valdymo architektūrinių sprendimų tyrimas. Sukurtoje platformoje kompanijos gali komunikuoti tarpusavyje, sudaryti užsakymus, keistis bylomis bei dokumentais, ieškoti kitų paslaugų tiekėjų ir gauti informaciją apie juos. Pasitikėjimas tarp įmonių yra labai svarbus, o ši platforma padeda tai pasiekti. Bendravimas su klientais ir tiekėjais paprastai užima daug laiko ir reikalauja naudoti daug skirtingų įrankių, pavyzdžiui, el. paštą, telefoninius skambučius, Skype, ryšių su klientais valdymo sistemas ir t. t. Šio sprendimo idėja yra į vieną vietą sutraukti visus svarbiausius įrankius ir palengvinti kasdienį vadybininkų darbą. Aukštos kokybės paslaugų užtikrinimui reikalinga integracija su kitomis išorinėmis verslo valdymo sistemomis, o kad tai būtų pasiekta, reikalingos saityno tarnybos. Siekiant išsiaiškinti, kokios tarnybos ir jų konfigūracijos geriausiai tinka šiam tikslui pasiekti, buvo atliktas tyrimas ir eksperimentas, kurie aprašyti šiame dokumente. Šį dokumentą sudaro trys pagrindinės dalys. Pirmojoje dalyje aprašoma galimų sprendimų analizė ir saityno tarnybų savybių tyrimas. Antrojoje dalyje aprašoma sukurta platforma, jos aktualumas ir funkcionalumas. Taip pat pateikiamos vartotojo sąsajos, panaudojimo atvejų schemos ir klasių diagrama. Šioje dalyje atsakoma į klausimus, kodėl vartotojai turėtų pasirinkti būtent šią platformą ir kokias problemas ji sukurta spręsti. Paskutiniojoje dalyje aprašomas eksperimentas, kuriuo buvo nustatomas... [toliau žr. visą tekstą] / This is a research on architectural solutions of business to business orders management systems. It’s a B2B platform where different companies can communicate, exchange orders and documents and search for other providers. Trust building is important for all companies and this platform can help to make it happen. Communication between companies requires a lot of time and use of different tools, e.g. email, phone calls, Skype, file storage places, CRMs and so on. Idea is to implement all necessary equipment in one place and let managers to do their daily work easier. To provide high quality services it’s important to ensure good communication between platform and outside business management systems. There was made a research for which are the best fitting solutions to be integrated as web services. This document is consisted of three major parts. First part describes analysis of available solutions and research of web services technology. Second part describes developed project and its features. There is user interface, use case, data structures and competitors review. This is whole about project and why it would be good choice for our targeted audience. The last part describes the research that was done during this project. It was essential to determine which protocol and data models are most efficient. For this project there were created two additional applications - one as web service and other one as a client. Client application sent requests to service and calculated its... [to full text]

World Wide Web (WWW) has become the greatest repository of information that man has ever assembled and it is continuously growing. WWW transformed itself into a generative environment that fosters innovation through the advance of technologies and a shift in people's perception of the Weband how they use it. The new WWW or Future Internet is that of an Internet of Services and Internet of Things.Naturally, a series of questions arise from this context: how do you filter things to create more value than you currently get? how do you aggregate things in an intelligent and easy way instead of doing it in your head? The world cannot be described unambiguously, so how can you allow users to deal with the world in their own way, based on their understanding? Levine in his book "Cluetrain manifesto" was arguing that markets are conversations so how can users be involved in the conversation? how can users be empowered with easy consumption of the services, information, things that they found around?However design and deployment of such software capable of direct interaction and empowerment of the end-user is still an issue. We have on one side users that have ideas, but do not have technical background and lack programming skills to do the development by themselves. On the other side, we have large amounts of data, resources and services that could be aggregated both in terms of data, but most important in terms of behavior to innovate and create new things.Our goal in this thesis is to address this lack of tools that are capable of direct interaction andempowerment of end-users, in a unified manner. Thus our main contribution in this thesis is the development of a holistic approach for web based systems that are user-centric and that integrate data, services and behavior available on the Web 2.0.

Today, Peer-to-peer (P2P) computing and Web Services play an important role in networking and computing. P2P computing, that aims addressing all the resources in a network and sharing them, is an old paradigm that gains importance nowadays with the advent of popular file sharing and instant messaging applications. On the other hand, a Web service is a software system that has an interface allowing applications to interact with other applications through Internet or intranet. Providing methods for publishing and discovering Web services from which mobile devices can facilitate in a P2P environment enables exploitation of P2P and Web service technologies efficiently by mobile devices. This also extends the range of devices that facilitate P2P and Web services technologies from servers and desktop computers to personal digital assistants (PDAs) and mobile phones. In this thesis, an architecture that enables publishing and discovering Web services for mobile clients that are inter-connected in a P2P environment is introduced. Key issues in this architecture are allowing mobile devices to join in a P2P network group, publishing Web services and discovering these services in P2P network. Invoking Web services that are published and discovered is another key issue in this architecture. The architecture introduced exploits P2P and Web services standards using various tools for mobile devices. For the purpose of organizing a P2P environment, JXTA protocols and services are used. WSDL is used for describing Web services. JXTA advertisements help in publication and discovery of Web services / and BPEL enables composition, deployment and execution of Web services. The architecture introduced within the scope of this thesis combines all these standards with tools that enable use of these standards on mobile devices. The work done in this thesis is realized as a part of Artemis, a project funded by European Commission for providing interoperability of medical information systems.

The proliferation of services on the web is leading to the formation of service ecosystems wherein services interact with one another in ways not foreseen during their development or deployment. This means that over its lifetime, a service is likely to be reused across multiple interactions, such that in each of them a different interface is required from it. Implementing, testing, deploying, and maintaining adapters to deal with this multiplicity of required interfaces can be costly and error-prone. The problem is compounded in the case of services that do not follow simple request-response interactions, but instead engage in conversations comprising arbitrary patterns of message exchanges. A key challenge in this setting is service mediation: the act of retrofitting existing services by intercepting, storing, transforming, and (re-)routing messages going into and out of these services so they can interact in ways not originally foreseen. This thesis addresses one aspect of service mediation, namely service interface adaptation. This problem arises when the interface that a service provides does not match the interface that it is expected to provide in a given interaction. Specifically, the thesis focuses on the reconciliation of mismatches between behavioural interfaces, that is, interfaces that capture ordering constraints between message exchanges. We develop three complementary proposals. Firstly, we propose a visual language for specifying adapters for conversational services. The language is based on a an algebra of operators that are composed to define links between provided-required interfaces. These expressions are fed into an execution engine that intercepts, buffers, transforms and forwards messages to enact the adapter specification. Secondly, we endow such adapter specifications with a formal semantics defined in terms of Petri nets. The formal semantics is used to statically check the correctness of adapter specifications. Finally, we propose an alternative approach to service interface adaptation that does not require hard-wired links between provided and required interfaces. This alternative approach is based on the definition of mapping rules between message types, and is embodied in an adaptation machine. The adaptation machine sits between pairs of services and manipulates the exchanged messages according to a repository of mapping rules. The adaptation machine is also able to detect deadlocks and information loss at runtime.

Whenever autonomous entities work together to meet each other's needs, there arises the problem of how an entity with a need can find and use entities with the capability to meet that need. This problem is seen in Web service architectures, agent systems, and data integration systems, among others. Solutions have been proposed in each of these fields, but they are all dependent on implementation and interface. Hence all are restricted to their particular field, and all require their participants to conform to certain assumptions about implementation and interface. This failure of support for service autonomy is conceptually unattractive and impractical. In this thesis we show how to describe and matchmake service capabilities and client needs in a way that is implementation and interface independent. The result is a service discovery solution that fully supports the rights of services to choose their own implementation and interface. Our representation is capable of capturing capabilities across a range of service types, from Web services to agents to data sources, while ignoring the implementation and interface details that distinguish them. Thus, our solution unifies these fields for description and discovery purposes, allowing data sources with complex language interfaces to compete against form-based Web services and frame-and-slot agents, for example. Moreover, our solution captures all of the most important aspects of capability, such as: the conceptual meaning and limitations on what a service can achieve; what requests can be expressed through a service's interface, and limitations on what attributes of information a service can return. The provision of an interface independent capability description raises the additional question of how to enable a client to invoke the service to which it has been matched, and correctly interpret the results returned; we solve this by providing an interface description that maps from client objectives onto invocations, and from returned results onto a canonical result format.

Whenever autonomous entities work together to meet each other's needs, there arises the problem of how an entity with a need can find and use entities with the capability to meet that need. This problem is seen in Web service architectures, agent systems, and data integration systems, among others. Solutions have been proposed in each of these fields, but they are all dependent on implementation and interface. Hence all are restricted to their particular field, and all require their participants to conform to certain assumptions about implementation and interface. This failure of support for service autonomy is conceptually unattractive and impractical. In this thesis we show how to describe and matchmake service capabilities and client needs in a way that is implementation and interface independent. The result is a service discovery solution that fully supports the rights of services to choose their own implementation and interface. Our representation is capable of capturing capabilities across a range of service types, from Web services to agents to data sources, while ignoring the implementation and interface details that distinguish them. Thus, our solution unifies these fields for description and discovery purposes, allowing data sources with complex language interfaces to compete against form-based Web services and frame-and-slot agents, for example. Moreover, our solution captures all of the most important aspects of capability, such as: the conceptual meaning and limitations on what a service can achieve; what requests can be expressed through a service's interface, and limitations on what attributes of information a service can return. The provision of an interface independent capability description raises the additional question of how to enable a client to invoke the service to which it has been matched, and correctly interpret the results returned; we solve this by providing an interface description that maps from client objectives onto invocations, and from returned results onto a canonical result format.

Universiẗat, Diss., 2006--Saarbrücken.

Thesis (M.Sc. (Computer Science)) - Rhodes University, 2008.

Konstanz, FH, Diplomarb., 2003.

Thesis (Ph.D.)--Aberdeen University, 2009. / Title from web page (viewed on Feb. 23, 2010). Includes bibliographical references.