A framework for software architecture refactoring using model transformations and semantic annotations. Architecturebased runtime software evolution proceedings. Despite decays prevalence, there is a relative dearth of empirical data regarding the nature of. This paper presents an architecturebased approach to runtime software evolution. Introduction despite extensive research in dynamic evolution of componentbased systems and available component models which allow software reconfiguration 4, safe reconfiguration is still an open problem 5. This is the of papers that we have been set to read. Software products have been racing against aging problem for most of their lifecycles, and evolution is the most effective and efficient solution to this problem. Successful runtime evolution must enable the new, replacement variant to be initialized with the data of the replaced one. Modelbased selfadaptation of serviceoriented software systems gk workshop 2010 schloss dagstuhl, june 2, 2010.
Architecture based approaches for runtime evolution enable software systems to dynamically move between consistent architectural variants. Oct 24, 2010 dynamic evolution is based on the runtime evolution of software, mainly characterized as software selfadapting to environment. Architecturebased approaches for runtime evolution enable software systems to dynamically move between consistent architectural variants. The evolution process includes fundamental activities of change analysis, release planning, system implementation and releasing a system to. We present an architecture based approach to runtime software evolution and highlight the role of software connectors in supporting runtime change. Journal of theoretical and applied information technology august 2015. These research efforts are focused on making the architectural model the locus for easier and more. The adapter maintains an emf compliant model at runtime, and external programs like our synchronization engine use the standard operations to manipulate this runtime model, like copying the runtime model to a common static model the read operation in the algorithm in fig. Runtime software architectural models for adaptation. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Our architecture for constructing selfevolving software systems consists of four components figure 1.
In proceedings of the 20th international conference on software engineering icse98. Pdf runtime software architecture based on reflective. Internetware, architecturebased runtime management, model driven development, eclipse. Saas dynamic evolution based on modeldriven software product lines. For these systems, runtime system evolution can mitigate the. Runtime system reconfiguration is one aspect of achieving continuous availability. The first step in enabling selfevolution is to determine, given a model of the systems current configuration, the. We present an architecturebased approach to runtime software reconfiguration, highlighting the beneficial role of architectural styles and. A software architectural model describes the design of the. Architecturebased sw process model, acm sigsoft software. Architectural evolution manager architectural evolution manager maintains runtime consistency between architectural model and implementation. Architecturecentric software evolution 1, 6, 10 allows an appropriate abstraction to model, analyze and execute software evolution in a controllable and manageable fashion.
Most languages have some form of runtime system, which implements control over the order in which work that was specified in terms of the language gets performed. Static evolution is mainly implemented by human static intervention and analysis. Runtime software architecture based software evolution and. Several unique elements of our approach are a an explicit architectural model, which is deployed with the system and used as a basis for change, b preservation of explicit software connectors in the system implementation, and c an imperative language for. Software engineering software evolution geeksforgeeks.
Research open access architecturebased integrated management. Considering the work presented in this paper, abc process model is improved as shown in fig. In 12, an architectureoriented require ments engineering approach is. In 2008, he received the most influential paper award for a paper titled architecturebased runtime software evolution published in the acmieee international conference on software engineering 1998. Architecturebased selfadaptive software 10 is underpinned by runtime software evolution using explicit architectural models 11 and approaches the problem of adaptation management by using the systems architectural model as the central artifact. A specification and detection approach for parallel evolution. For these systems, runtime system evolution can mitigate the costs and risks associated with shutting. Compared with traditional software process model, absp model has many. Architecturebased runtime software evolution proceedings of the. Coauthored a classification and comparison framework for software architecture description languages, which was the single mostcited journal article in software engineering. Implementation runtime deployed componentbased software system which may be instrumented for monitoring. Sever model, which is deployed with the system and used as a basis for change, b preservation of explicit softwaue connectors in the system implementation, and c an imperative language for. Modelbased selfadaptation of serviceoriented software.
From its very inception, the study of software architecture has recognized architectural decay as a regularly occurring phenomenon in longlived systems. Architecturebased integrated management of diverse cloud. Runtime environment of software are becoming more and more dynamic and changeful, while pervasive computing and web services further this situation. A runtime system, also called runtime system, primarily implements portions of an execution model.
Continuous availability is a critical requirement for an important class of software systems. Jul 29, 2014 to address the issues above, we try to leverage architecturebased runtime model for the management of diverse cloud resources. Abstractruntime models play a critical role in modern selfadaptive systems. Citeseerx architecturebased runtime software evolution. In this paper, a dynamic model of computation based on the universal turing machine is proposed. Knowledgebased architectural adaptation management for. A largescale study of architectural evolution in open. This paper presents a changetracing model that regards the change as the starting point and focuses on software evolution in oo paradigm. An architectural approach to ensure globally consistent. A modeldriven architecture based evolution method and its. Software systems are becoming larger, more complex, and difficult for maintenance and evolution. A runtime architecturebased approach for the dynamic. A runtime architecturebased approach for the dynamic evolution. Architecturebased runtime software evolution abstract.
Architecture based runtime software evolution abstract. Shaw 10 can provide a foundation for systematic runtime software evolution. Abstract software evolution has been a necessary part of the software development, while software architecture evolution is an important issue of software evolution. Composition of components and their relationship are reconfigured during execution time based on the changes that occurs to the software.
Software architecture at runtime download scientific diagram. Runtime software architecture based on reflective middleware. A runtime architecture based approach for the dynamic evolution of distributed component based systems abstract dynamic evolution of distributed component based systems dcs is an important task in software engineering. The above figure is a snap shot of our architecturebased runtime management tool for pkuas. Focusing on parallel evolution conflicts of software architectures, firstly the paper establishes definitions and characterizations of. In this paper architecturebased software process model absp is presented.
The central editor shows the architecture model of a java petstore jps application running on pkuas currently. Runtime architectural models are software models that coexist with the executing software system, such that runtime decisions about dynamic changes to the executing system are made by analyzing the architectural model and then applied to the executing system. On the basis of such analysis on rsa, our approach of rsabased software evolution consists of 3 parts. The small set of abstractions and diagram types makes the. Runtime software architecture rsa can help maintainers to understand, control, adapt and evolve the system, while keep the system running.
A runtime architecturebased approach for the dynamic evolution of distributed componentbased systems abstract dynamic evolution of distributed componentbased systems dcs is an important task in software engineering. I have made this directory writable by everyone so you can upload papers as you find them further, i have started to compile a. For these systems, runtime system evolution can mitigate the costs and risks associated with shutting down and restarting the system for an update. An evolution management model for multilevel componentbased. An architecturebased runtime model is a causally connected selfrepresentation of the associated system that emphasizes the structure, behavior, and goals of the system from a problem space perspective. Runtime model knowledge thomas vogel gk workshop 2010 2 june 5. A specification and detection approach for parallel evolution conflicts of software architectures. Particularly, sa can be used to reduce the great difficulty and cost of software maintenance and evolution.
Modeldriven architecture mda is a new technique for software product for evolving development and. Architectural decay is caused by repeated, sometimes careless changes to a system during its lifespan. Lifecycle based study framework of software evolution ieee. Architecturebased runtime software evolution ieee conference. In this paper, runtime software architecture rsa based on reflective middleware is proposed to support architecturebased software maintenance and evolution. Runtime software architectural models for adaptation, recovery. A computer running several software components is often called an application.
They manage and control access to these operations using preconditions related to the change, according its origin, level, or subject. A conceptual model for software quality framework is provided together with the. Despite decays prevalence, there is a relative dearth of empirical data regarding the nature of architectural changes that may lead to. An architecture for constructing selfevolving software systems chrysanthos dellarocas. This is why dedal is a choice a dl for architecturebased software evolution management. Architecturebased design software architecture is not just a phase or an activity in the software development life cycle, but a discipline pervading all phases of development. Bigraph specification of software architecture and. We present an architecturebased approach to runtime software evolution and highlight the role of software connectors in supporting runtime change. In modeldriven software architecture, models of the software architecture are developed prior to implementation.
These architectural modelsdescribing software systems in terms of functional components. An architecture for constructing selfevolving software systems. Software evolution is a term which refers to the process of developing software initially, then timely updating it for various reasons, i. Lifecycle based study framework of software evolution. Software systems are not only becoming larger, more complex, and also more rigid, which make it difficult to evolve software. Coauthored the icse 1998 paper titled architecturebased runtime software evolution, which was recognized as that conferences most influential paper. Such models usually describe systems in terms of components, connectors, and the interconnections between them 11. Architecturebased dynamic evolution runtime environment adere for. We believe that integrating the discipline of architecture into the development process has the potential to increase the quality of software produced while reducing both the costs of development and.
Runtime environment of software are becoming more and more dynamic and open, while pervasive computing and web services further this approach. To demonstrate the philosophy, we propose a software reuse methodology, which is called abc architecture based component composition. Pkuas constructs and represents its platform and applications from the perspective of software architecture so as to provide an understandable, userfriendly and systematic way to use reflective middleware. A language and environment for architecturebased software development and evolution. Medvidovics paper on architecturebased runtime software evolution, which appeared in the proceedings of the 1998 international conference on software engineering, was named in may 2008 that conferences most influential paper. Software architecturebased adaptation for pervasive systems. An architecturebased approach to runtime software evolution has been proposed that includes an explicit architectural model, which is deployed with the system and used. A language and environment for architecturebased software. Dynamic evolution is based on the runtime evolution of software, mainly characterized as software selfadapting to environment. These architectures are models of software systems which are changeable at runtime with model changes dynamically re. I will add links to the papers as soft copies become avaliable.
Mar 01, 2003 explicit software architecture is principal in the development of a software project. Explicit architectural model interconnection between components and connectors, and their mappings to implementation modules. Software architecture evolution is generally realized through some evolution operations such as adding components or connectors, removing components or connectors. An architecture for constructing selfevolving software. The runtime layer task model architectural model runtime system model api translator architecture manager 4. Figure 2 shows how to recover software architecture from a runtime system and. We present an architecturebased approach to runtime software evolution and. A selfadaptive system uses runtime models to adapt its architecture to the changing requirements and contexts. Dynamic architecture based evolution of enterprise information systems. Specifications of software architecture based on bigraph 3. Most rsabased evolution and adaptation approach should only be applied into proprietary systems. A framework for classifying and comparing architecture.
An architecturebased reflective component operating. Theorem provers and model checkers typically require some assistance from the user. Several unique elements of our approach are a an explicit architectural model. The key issue to support rsa is to maintain the causal connection between the architecture and the system, ensuring that the architecture represents. Check if you have access through your login credentials or your institution to get full access on this article. Technique in implementing architecturebased adaptation includes using a. This paper describes approaches for dynamic software. A runtime architecturebased approach for the dynamic evolution of. The key in such architecturebased maintenance and evolution is to recover. Hence, runtime architectural models are needed when making adaptation decisions in architecturebased selfadaptive systems. A formal approach for managing componentbased architecture. Explicit software architecture is principal in the development of a software project. Selfadaptation through incremental generative model transformations at runtime. He is chair of acm sigsoft and coauthor of software architecture.
Architectural model a model of the systems components, connectors, and links. Runtime software architecture based softw are online evolution qianxiang wang, gang huang, junrong shen, hong mei, fuqing yang institute of software, school. Architecturebased evolution 17 can greatly benefit from dynamic reconfiguration. Runtime software architecture based softw are online evolution qianxiang wang, gang huang, junrong shen, hong mei, fuqing yang institute of software, school of electronics engineering and computer. Each structure comprises software elements, relations among them, and properties of both elements and relations. However, there is no onetoone mapping between the requirements in the problem space and the architectural elements in the solution space. Software architecture, runtime evolution, component model 1.
Citeseerx runtime software architecture based software online evolution citeseerx document details isaac councill, lee giles, pradeep teregowda. Introduction internetware is a paradigm of the cooperative, situational, emergent, evolvable, autonomous and trusted software systems running on the open, global, ubiquitous and smarter internet software of internet as a computer. Towards controlling software architecture erosion through. The evolution process proposed here is driven by an evolution management model that captures changes initiated at any abstraction level, controls their impact to preserve restore consistency and propagates them to other levels to maintain global coherence.
Dynamic software reconfiguration is needed for systems that need to evolve after they have been deployed and the configuration is required to be updated dynamically. First, we construct the architecturebased runtime model of each kind of cloud resource cloud. Most languages have some form of runtime system, which implements control over the order in which work that was specified in terms of the language gets. Modelling changes and data transfers for architecturebased. We propose an approach based on a runtime architecture which is visually generated from an attributed type graph metamodel, exists through the lifecycle of dcs, establishes the causal relation between architectural topology and system. In this paper, we present an architecturebased approach to the integrated management of diverse cloud resources. In this paper, runtime software architecture rsa based on reflective middleware is. This model is capable of applying runtime code modifications for 3symbol deterministic turing machines at runtime and requires a decomposition of the simulated machine into parts called subtasks. Software architecture allows us to make many decisions about a software system and analyze it even before it has been implemented, so as to make planned development possible. However, the existing work only uses model checking technology to discuss the link properties of software architecture, not the place properties of software architecture in the software evolution. Software upgrade techniques for distributed systems.
However, when these systems are distributed and highly dynamic, there is an added need to discover the systems software architecture model. As software systems become more and more complex, there is need to consider not only data structures and algorithms but also the general structure or architecture of the system. Software architecture refers to the fundamental structures of a software system and the discipline of creating such structures and systems. The c4 model is an abstractionfirst approach to diagramming software architecture, based upon abstractions that reflect how software architects and developers think about and build software. Selfadaptation through incremental generative model. Software reconfiguration patterns for dynamic evolution of. This is in contrast to the runtime lifecycle phase of a program, during which the runtime system is in operation. An approach to reliable software architectures evolution. Process model of architecture based, component oriented software engineering. In architecturebased approach, architecture model is used to enable dynamic adaptation of software at runtime. The architecture of a software system is a metaphor, analogous to the architecture of a building. As of 2010 many successful software component models exist. An architectural style perspective on dynamic robotic. Towards a knowledgebased approach to architectural.
Usc viterbi school of engineering viterbi faculty directory. Architecturebased design institute for software research. Runtime software architectures rsa are architecture level, dynamic representations of running software systems, which help monitor and adapt the systems at a high abstraction level. An architecturebased runtime management tool for pkuas. Absp model divides software process based on architecture into six sub processes. Many of the elements in this architecture model are actually the images of resources at runtime, like applications, ejbs, interceptors, etc. This paper focuses on online evolution, more exactly, how to make online evolution process convenient and smart, with help of runtime software architecture rsa. Describing runtime change modification description uses operations for adding.
Runtime software architecture based software online evolution. Architecturebased dynamic evolution runtime environment. The implementation of the architecture is undertaken through use of the tool called archstidio. This paper presents an architecture based approach to runtime software evolution. On the role of software architectures in runtime system.
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