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Migration of form based legacy systems towards service-oriented computing is a challenging task, requiring the adaptation of the legacy interface to the interaction paradigm of Web services. In this paper, a wrapping methodology is proposed to make interactive functionalities of legacy systems accessible as Web services. The wrapper that is used for interacting with the legacy system acts as an interpreter...
An effective way of leveraging the value of legacy systems is to expose their functionality, or subsets of it, as services. In the business world, this has become a very popular approach because it allows underlying systems to remain largely unchanged, while exposing functionality to a larger number of clients through well-defined service interfaces. The U.S. Department of Defense (DoD) is also adopting...
This paper describes our experiences of applying dynamic analysis solutions on an industrial legacy application written in C, with the help of aspect orientation (AO). We use a number of dynamic analysis techniques that can help in alleviating the problem of (1) establishing the quality of the available regression test and (2) regaining lost knowledge of the application. We also show why our aspect...
Recently, there is an increasing research interest in mining versioning information, i.e. the analysis of the transactions made on version systems to understand how and when a software system evolves. One particular area of interest is the identification of move operations as these are key indicators for refactorings. Unfortunately, there exists no evaluation which identifies the quality (expressed...
As size and complexity of software systems increase, preserving the design and specification of their implementation structure gains importance in order to maintain the evolvability of the system. However, due to constant changes, the implementation structure and its documentation tend to dilute over time. To address this problem, we developed IntensiVE: a toolsuite for documenting and checking structural...
Summary form only given. The development environment has vastly changed over the last years. Development architectures of single database servers are replaced by message based exchange servers, cross application handling emerged, business demands change more rapidly and Web portals, Web services etc. require not only new tools to manage software maintenance, but also preventive maintenance tools as...
Dynamic analysis has long been a subject of study in the context of (compiler) optimization, program comprehension, test coverage, etc. Ever-since, the scale of the event trace has been an important issue. This scalability issue finds its limits on the computational front, where time and/or space complexity of algorithms become too large to be handled by a computer, but also on the cognitive front,...
In this paper, we present case studies of recovering structural design patterns from object-oriented source code. The proposed recovery technique is based on the use of visual language parsing techniques, and is supported by a visual environment automatically produced by a grammar based visual environment generator. We have applied the recovery technique to public-domain programs and libraries obtaining...
While many commercial and academic design recovery tools have been proposed over the years, assessing their relevance and comparing them is difficult due to the lack of a well-defined, comprehensive, and common framework. In this paper, we introduce such a common comparative framework. The framework builds upon our own experience and extends existing comparative frameworks. We illustrate the comparative...
Recovering the architecture is the first step towards reengineering a software system. Many reverse engineering tools use top-down exploration as a way of providing a visual and interactive process for architecture recovery. During the exploration process, the user navigates through various views on the system by choosing from several exploration operations. Although some sequences of these operations...
Automated formatting is an important technique for the software maintainer. It is either applied separately to improve the readability of source code, or as part of a source code transformation tool chain. In this paper we report on the application of generic tools for constructing formatters. In an industrial setting, automated formatters need to be tailored to the requirements of the customer. The...
Versioning systems such as CVS exhibit a large potential to investigate and understand the evolution of large software systems. Bug reporting systems such as Bugzilla help to understand which parts of the system are affected by problems. In this article, we present a novel visual approach to uncover the relationship between evolving software and the way it is affected by software bugs. By visually...
Change is an essential element of the software development cycle, certainly since systems which do not change, perish. Despite the importance of changes, most evolution studies evaluate the impact of changes by comparing two or more snapshots of a system over time instead of reconstructing and evaluating the actual change operations. Therefore we propose a number of techniques which are capable of...
Summary form only given. This talk explains how software maintenance and re-engineering activities can be viewed as a search for solutions that balance many competing constraints to achieve an optimal or near optimal result. This interpretation of the problems we face leads to the inevitable conclusion that the search process, as currently followed, is a woefully labour-intensive human activity; it...
Migration of form based legacy systems towards service-oriented computing is a challenging task, requiring the adaptation of the legacy interface to the interaction paradigm of Web services. In this paper a flexible wrapper supporting a process for making accessible functionalities of legacy systems as Web services is presented
This paper describes an approach for the migration of supervisory machine control architectures. This migration, from a paradigm based on finite-state machines to a paradigm based on task-resource systems, is described in terms of model transformations. We propose a generic migration approach that involves normalising a legacy architecture that, in turn, is transformed. Based on the architecture of...
The high cost of software maintenance could potentially be greatly reduced by the automatic refactoring of object-oriented programs to increase their understandability, adaptability and extensibility. This paper describes a novel approach in providing automated refactoring support for software maintenance; the formulation of the task as a search problem in the space of alternative designs. Such a...
Web applications design methodologies hold the promise of engineering high-quality and long-lived Web systems and rich Internet applications. However, many such methodologies focus solely on green-field development, and do not properly address the situation of leveraging the value locked in legacy systems. This paper proposes a holistic approach to redesigning legacy applications for the Web using...
Database reengineering consists in deriving a new database from a legacy database and adapting associated software components accordingly. This migration process typically involves three main steps, namely schema conversion, data conversion and program conversion. This paper presents a wrapper-based approach to automating the program conversion step. The proposed approach combines program transformations...
In this paper, we present ADAMS (ADvanced Artefact Management System), a Web-based system that integrates project management and artefact management features, as well as context-awareness and artefact traceability features. In particular, we focus on two features of the tool, namely hierarchical versioning and traceability support
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