For a long time, the development of component-based systems has been a crucial part of real-time software development required for embedded and automotive domains. However, most of the existing tools used in these fields are not only proprietary, but also expensive and not research-friendly. Open-source tools in this domain are so far quite limited in terms of the features supported, especially, code generation. In this thesis, we demonstrate how we can improve the development of real-time and concurrent systems by the introduction of component-based modelling into Umple, an open-source modelling tool. Our work enables component-based modelling to be performed both textually and visually, as is the case with other Umple features. We introduce a number of major features into Umple. First, we introduce support for real-time C++ code generation. This includes supporting all Umple features, such as class diagrams, associations, state machines, and attributes. In order to achieve this, we also introduce Umple Template Language (Umple-TL), which helps Umple developers to use Umple itself to emit text using easy-to-use constructs, such that the text emitted can be in different target languages such Java and C++. Umple-TL provides additional capabilities relying on Umple being a model-oriented and object-oriented language. Umple-TL has become the technology for all code generation in Umple, not just our real-time C++ generators. Umple-TL also plays a vital role easing writing component descriptions Second, we support concurrency, which is crucial for the underlying architecture of composite structure. We have to avoid relying on any third-party libraries in order to make sure that the code generated will be deployable on embedded devices, which are limited and do not provide a lot of options. The concurrency pattern we follow extends the active object pattern aiming to enhance communication among active objects. Concurrency development in general, even if a programming language used is not real-time, is not easy. Hence, we simplify active object concepts, such as future, promise, and delay, using new Umple keywords. We also add composite structure support to Umple, we believe that our syntax and language constructs are comprehensive, and do not require a wide knowledge of modelling and UML concepts. Additionally, we introduce a novel protocol-free approach that dynamically extracts communication protocols from ports, bindings, and active objects as a way to simplify development, and to lead to concise and optimized code generation. We demonstrate the effectiveness of our work using cases studies, in which we implement Umple models using our new composite structure and concurrency constructs. We show that the amount of code required to specify complex concepts is reduced, and the generated systems are effective.

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Dentre as tecnologias de desenvolvimento de software que promovem o reuso com o objetivo de construir sistemas com prazos e custos menores, sem sacrificar a qualidade dos produtos, está o Desenvolvimento Baseado em Componentes (DBC). O Desenvolvimento Baseado em Componentes consiste na construção de sistemas pela composição de componentes de software de acordo com um processo de desenvolvimento específico. Para garantir a qualidade desses sistemas, é importante garantir a qualidade de seus componentes. A falta da garantia da qualidade dos componentes de software destinados à reutilização é um dos fatores de inibição do DBC, e existe certa carência de pesquisas sobre a qualidade de componentes de software. Desta maneira, o principal objetivo deste trabalho foi a definição de um modelo de qualidade específico para componentes de software, fornecendo a base para a especificação de requisitos de qualidade e para a avaliação de qualidade dos mesmos. O Modelo está embasado nas normas ISO/IEC 9126 e ISO/IEC 12119, e também na literatura especializada. Uma ferramenta para apoiar avaliações de componentes (e de produtos de software de forma geral) também foi desenvolvida. Foram realizadas ainda quatro avaliações de componentes através de estudos de casos para verificar a aplicabilidade e utilidade do modelo de qualidade e da ferramenta desenvolvida. Dois questionários foram respondidos pelos avaliadores responsáveis pelas avaliações coletando assim, suas considerações sobre o modelo de qualidade e sobre a ferramenta / Among the software development technologies that promote the reuse aiming to build systems with periods and smaller costs, without sacrificing the quality of products, is the Component-Based Development (CBD). The Component-Based Development consists on the construction of systems by the composition of software components according to a specific development process. To guarantee the quality of those systems, it is important to guarantee the quality of their components. The lack of warranty of the quality of the software components destined to reuse is one of the inhibition factors of CBD, and there is certain lack of researches about quality of software components. This way, the main objective of this work was the formalization of a specific quality model for software components, supplying the base for the specification of quality requirements and for the quality evaluation of the same ones. The model is based on the norms ISO/IEC 9126 and ISO/IEC 12119, and also in the specialized literature. A tool to support components evaluations (and software products in a general way) was also developed. It was realized four components evaluations through case studies to verify the applicability and usefulness of the quality model and the developed tool. Two questionnaires were answered by the appraisers responsible for the evaluations collecting thereby, their considerations on the quality model and the tool

<p>The main goal of this thesis is to investigate efficient searching mechanisms for searching and retrieving software components across different remote repositories and implement a supporting prototype called “Component Repository Browser” using the plug-in based Eclipse technology for PROGRESS-IDE. The prototype enables users to search the ProCom components and to import the desired components from a remote repository server over different protocols such as HTTP, HTTPS, and/or SVN. Several component searching mechanisms and suggestions were studied and examined such as keyword, facet-based search, folksonomy classification, and signature matching, from which we selected keyword search along with facet-based searching technique to help component searchers to efficiently find the desired components from a remote repository.</p>

Development of embedded systems poses an increasing challenge fordevelopers largely due to increasing complexity. Several factors contribute tothe complexity challenge: • the number of extra-functional properties applying to embedded systems,such as resource usage, timing effects, safety. • the functionality of embedded systems, to a larger extent than for othersoftware, involves engineers from multiple different disciplines, such asmechanical, control, software, safety, systems and electrical engineers.Themulti-disciplinarity causes the development environments to consistof separate data, models and tools. Several engineering paradigms to handle this complexity increase havebeen suggested, including methodologies focused on architecture, models andcomponents. In systems engineering, a long-standing approach has been todescribe the system in several views, each according to a certain viewpoint.By doing so, a divide-and-conquer strategy is applied to system concerns.Unfortunately, it is hard to always find completely independent concerns:there is always some semantic overlap between the different views. Modelbaseddesign (MBD) deals with building sound abstractions that can representa system under design and be used for analysis. Component-based design(CBD) focuses on how to build reusable component models with well-definedcomposition models. In this thesis, a concept of formalized multi-viewed component models (MVCM) is proposed, which integrates the three above mentioned paradigms.Principles and guidelines for MV CMs are developed. One of the main challengesfor the proposition is to provide MV CMs that produce composabilityboth along component boundaries and viewpoint boundaries. To accomplishthis, the relations between viewpoints need to be explicitly taken into account.Further, the semantic relations between these viewpoints need to be explicitlymodeled in order to efficiently ensure that the views are kept consistent. Asa main contribution, this thesis presents the formalization of the conceptsneeded to build such component models. A proper formalization of multiviewedconcerns provides several opportunities. Given suitable tool support, itwill be feasible to automate architecture analysis and architecture exploration. The thesis includes a number of case studies that provide insight andfeedback to the problem formulation and validating the results. The casestudies include a resource-aware reconfigurable middleware, a design of anarchitecture exploration methodology, and a windshield wiper system. / <p>QC 20130527</p>

It is widely believed and empirically shown that component reuse improves both the quality and productivity of software development. This brings the necessity of a graphical editor to model the projects by using components. A graphical editor was implemented for the development of Component Oriented software development. The editor facilitates modeling efforts through application of the graphical modeling language COSEML. Both design patterns and software components have come to play important roles in software development. The correlation between software components and design patterns is apparent. In the design phase of the projects design patterns are used widely both in component and object oriented projects. Design patterns can be used as super components in component-based development . Software reuse, software components, design patterns, use of design patterns in component-based development, and component architectures are studied in details to address the need for the approach. COSE modeling activity starts with the decomposition of the target system into building blocks in a top-down order. Next, interfaces between these blocks are defined. If required design patterns can be added to model as super components.

Orientador: Cecilia Mary Fischer Rubira / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-05T04:18:48Z (GMT). No. of bitstreams: 1 Brito_PatrickHenriquedaSilva_M.pdf: 1701733 bytes, checksum: c2009f5302dc57e1c6d8e2d4a0c95c85 (MD5) Previous issue date: 2005 / Resumo: Devido a grande popularização do Desenvolvimento Baseado em Componentes (DBC), ele vem sendo empregado inclusive no desenvolvimento de sistemas computacionais críticos. O emprego do DBC na construção de sistemas confiáveis evidencia a necessidade de se desenvolver componentes de software que sejam robustos e que possuam uma garantia maior do seu funcionamento correto. Tratamento de exceções é uma técnica bastante conhecida para a verificação e tratamento de erros em sistemas de software. Por'em, apesar da sua popularidade, o seu projeto e a implementação são constituídos de tarefas muito complexas que não recebem uma atenção adequada dos processos de desenvolvimento existentes. A situação É ainda mais crítica se levarmos em considera¸c¿ao os métodos para DBC. Este trabalho propõe um método para auxiliar a modelagem do comportamento excepcional de sistemas baseados em componentes, chamado MDCE+. Baseado no refinamento da metodologia MDCE, o MDCE+ apresenta dois diferenciais importantes, que reforçam o seu aspecto robusto: (i) o fato dele combinar as abordagens top-down e botton-up para o desenvolvimento de sistemas confiáveis; e (ii) o fato dele ser centrado na arquitetura. O foco na arquitetura de software contribui para uma melhor definição e análise do fluxo de exceções entre os componentes do sistema. Essa maneira estruturada de detectar e tratar exceções no contexto da ocorrência de falhas é particularmente relevante para sistemas que apresentam requisitos de confiabilidade extrema. O método MDCE+ é um método genérico que pode ser aplicada a processos de desenvolvimento modernos. Em particular, nesta dissertação o método MDCE+ foi adaptado ao processo UML Components e a uma metodologia de testes. Como maneira de avaliar esse método, foi desenvolvido um estudo de caso de um sistema financeiro real, com requisitos de tolerância a falhas. Dada a sua importância, o processo de avaliação do método MDCE+ foi dividido em tr¿es etapas: (i) preparação; (ii) execução; e (iii) análise dos resultados. Nesse estudo foi necessário tratar exceções na arquitetura do sistema, com o intuito de aumentar a disponibilidade dos serviços / Abstract: Due to the large adoption of the Component-Based Development (CBD), it has also been employed in the development of critical software systems. The development of dependable systems using the CBD paradigm evidences the necessity of developing software components that are robust and dependable. Exception handling is a well known technique for verify and treat errors in software systems. However, despite its popularity, its design and implementation are constituted of very complex tasks that do not receive the adequate attention from the existing development processes. This is still more critical in the context of CBD processes. This work presents the MDCE+, a method that assists the modeling of the exceptional behavior in component-based software development. Based in the refinement of the MDCE methodology, the MDCE+ presents two important differentials, that strengthen its robustness: (i) it combines the top-down and bottom-up strategies for the development of dependable systems; and (ii) it is centered in the software architecture. As a consequence of the focus given to the software architecture, the exceptions that flow between the system components are better defined and analyzed. This structured way to detect and to treat exceptions in the context of the occurrence of imperfections is particularly needed for developing dependable systems. The MDCE+ is a generic method that can be applied together with modern development processes. In particular, in this master thesis MDCE+ was adapted to the UML Components process and to a software test methodology. In order to evaluate this method, a case study of a real financial system with fault-tolerance requirements was developed. Given its importance, the evaluation process of the MDCE+ method was decomposed in three stages: (i) preparation; (ii) execution; and (iii) results analysis. In order to increase the services availability, in this study it was necessary to deal with exceptions in the software architecture / Mestrado / Engenharia de Software / Mestre em Ciência da Computação

Dentre as tecnologias de desenvolvimento de software que promovem o reuso com o objetivo de construir sistemas com prazos e custos menores, sem sacrificar a qualidade dos produtos, está o Desenvolvimento Baseado em Componentes (DBC). O Desenvolvimento Baseado em Componentes consiste na construção de sistemas pela composição de componentes de software de acordo com um processo de desenvolvimento específico. Para garantir a qualidade desses sistemas, é importante garantir a qualidade de seus componentes. A falta da garantia da qualidade dos componentes de software destinados à reutilização é um dos fatores de inibição do DBC, e existe certa carência de pesquisas sobre a qualidade de componentes de software. Desta maneira, o principal objetivo deste trabalho foi a definição de um modelo de qualidade específico para componentes de software, fornecendo a base para a especificação de requisitos de qualidade e para a avaliação de qualidade dos mesmos. O Modelo está embasado nas normas ISO/IEC 9126 e ISO/IEC 12119, e também na literatura especializada. Uma ferramenta para apoiar avaliações de componentes (e de produtos de software de forma geral) também foi desenvolvida. Foram realizadas ainda quatro avaliações de componentes através de estudos de casos para verificar a aplicabilidade e utilidade do modelo de qualidade e da ferramenta desenvolvida. Dois questionários foram respondidos pelos avaliadores responsáveis pelas avaliações coletando assim, suas considerações sobre o modelo de qualidade e sobre a ferramenta / Among the software development technologies that promote the reuse aiming to build systems with periods and smaller costs, without sacrificing the quality of products, is the Component-Based Development (CBD). The Component-Based Development consists on the construction of systems by the composition of software components according to a specific development process. To guarantee the quality of those systems, it is important to guarantee the quality of their components. The lack of warranty of the quality of the software components destined to reuse is one of the inhibition factors of CBD, and there is certain lack of researches about quality of software components. This way, the main objective of this work was the formalization of a specific quality model for software components, supplying the base for the specification of quality requirements and for the quality evaluation of the same ones. The model is based on the norms ISO/IEC 9126 and ISO/IEC 12119, and also in the specialized literature. A tool to support components evaluations (and software products in a general way) was also developed. It was realized four components evaluations through case studies to verify the applicability and usefulness of the quality model and the developed tool. Two questionnaires were answered by the appraisers responsible for the evaluations collecting thereby, their considerations on the quality model and the tool

The main goal of this thesis is to investigate efficient searching mechanisms for searching and retrieving software components across different remote repositories and implement a supporting prototype called “Component Repository Browser” using the plug-in based Eclipse technology for PROGRESS-IDE. The prototype enables users to search the ProCom components and to import the desired components from a remote repository server over different protocols such as HTTP, HTTPS, and/or SVN. Several component searching mechanisms and suggestions were studied and examined such as keyword, facet-based search, folksonomy classification, and signature matching, from which we selected keyword search along with facet-based searching technique to help component searchers to efficiently find the desired components from a remote repository.

Les environnements domotiques sont des environnements ubiquitaires dans lesquels des équipements domestiques, disséminés dans une habitation, fournissent des services utilisables à distance au travers d'un réseau. Des systèmes domotiques sont proposés pour permettre aux utilisateurs de contrôler les équipements en fonction de leurs besoins.Idéalement, ces systèmes orchestrent l'exécution des services fournis par les équipements pour réaliser des services complexes. Mieux encore, ces systèmes doivent s'adapter à la variété des environnements en termes d'équipements et des besoins des utilisateurs. Ils doivent également pouvoir s'adapter dynamiquement, si possible de manière autonome, au changement de leur contexte d'exécution (apparition ou disparition d'un équipement, évolution des besoins).Dans cette thèse, nous apportons une réponse à cette problématique avec SAASHA, un système domotique multi-agents à base de composants. La combinaison de ses deux paradigmes permet de gérer l'adaptation à trois niveaux : présentation (interfaces utilisateur),organisation (architecture du système) et comportement (architecture interne des agents).Les agents perçoivent le contexte et ses changements. Les utilisateurs se voient proposer une vue dynamique du contexte leur permettant de définir des scénarios personnalisés sous forme de règles. Les agents se répartissent les rôles pour réaliser les scénarios. Ils modifient dynamiquement leur architecture interne grâce à la génération, au déploiement et à l'assemblage de composants pour se doter de nouveaux comportements de contrôle des équipements et des scénarios. Les agents collaborent ainsi pour exécuter les scénarios. En cas de changement, ces trois niveaux d'adaptation sont mis en oeuvre de manière dynamique et autonome pour maintenir la continuité de service. Un prototype de SAASHA, basé sur les standards industriels UPnP et OSGi, a été développé pour évaluer la faisabilité de notre proposition. / Home automation environments are ubiquitous environments where domestic devices, scattered throughout a home, provide services that can be used remotely over a network. Home automation systems are proposed to enable the users of controlling the devices according to their needs. Ideally, these systems orchestrate the execution of the services provided by the devices to achieve complex services. Even more, these systems must adapt to the variety of environments in terms of devices and users needs. They must also be able to adapt dynamically, if possible in an autonomous manner, to the changes of their execution context (appearance or disappearance of a device, changing needs).In this thesis, we provide an answer to this problematic with SAASHA, a multi-agent home automation system based on components. The combination of these two paradigms enables managing the adaptation on three levels: presentation (user interface), organization (system architecture) and behavior (internal architecture of agents). The agents perceive their context and its changes. The Users are offered a dynamic view of the context allowing them to define custom scenarios as rules. The agents divide the roles among them to realize the scenarios. They modify dynamically their internal architecture throughout the generation, deployment and assembly of components to adopt new device control behaviors and scenarios. The agents collaborate to execute the scenarios. In case of a change, these three levels of adaptation are updated dynamically and autonomously to maintain the service continuity. A SAASHA prototype, based on UPnP and OSGi industry standards, has been developed to assess the feasibility of our proposal.