A Generic Network and System Management Framework

Networks and distributed systems have formed the basis of an ongoing communications revolution that has led to the genesis of a wide variety of services. The constantly increasing size and complexity of these systems does not come without problems. In some organisations, the deployment of Information Technology has reached a state where the benefits from downsizing and rightsizing by adding new services are undermined by the effort required to keep the system running. Management of networks and distributed systems in general has a straightforward goal: to provide a productive environment in which work can be performed effectively. The work required for management should be a small fraction of the total effort. Most IT systems are still managed in an ad hoc style without any carefully elaborated plan. In such an environment the success of management decisions depends totally on the qualification and knowledge of the administrator. The thesis provides an analysis of the state of the art in the area of Network and System Management and identifies the key requirements that must be addressed for the provisioning of Integrated Management Services. These include the integration of the different management related aspects (i.e. integration of heterogeneous Network, System and Service Management). The thesis then proposes a new framework, INSMware, for the provision of Management Services. It provides a fundamental basis for the realisation of a new approach to Network and System Management. It is argued that Management Systems can be derived from a set of pre-fabricated and reusable Building Blocks that break up the required functionality into a number of separate entities rather than being developed from scratch. It proposes a high-level logical model in order to accommodate the range of requirements and environments applicable to Integrated Network and System Management that can be used as a reference model. A development methodology is introduced that reflects principles of the proposed approach, and provides guidelines to structure the analysis, design and implementation phases of a management system. The INSMware approach can further be combined with the componentware paradigm for the implementation of the management system. Based on these principles, a prototype for the management of SNMP systems has been implemented using industry standard middleware technologies. It is argued that development of a management system based on Componentware principles can offer a number of benefits. INSMware Components may be re-used and system solutions will become more modular and thereby easier to construct and maintain

Composition and Correctness

AbstractThis paper presents an approach to ensure correctness of composed systems. It takes into consideration that correctness can usually be achieved only to a certain degree (except for some small and very mission-critical applications) and complete specifications are usually not practicable. By modelling the parts, the composition activities and the requirements specification we automise the checking procedures using model checking. An important issue hereby is that our approach allows partial modelling and specification

Survey: Agent-based Middlewares for Context Awareness

In the last few years, many middlewares for context awareness have claimed to be agent-based. In this paper, we make a survey on the most known frameworks. We classify them according to their level of conformity to the agent paradigm and we discuss the usefulness of agents in these frameworks. Based on this survey, we enumerate several advantages of using agents in context-aware middlewares and give illustrative examples. We also point to the weakness of existing frameworks and identify challenges to be addressed

An integrated component-oriented framework for effective and flexible enterprise distributed systems development

Although component-based platforms and technologies such as CORBA, COM+/.NET and Enterprise Java Beans (EJB) are now widely used for implementation and deployment of complex systems, the component way of thinking is still immature. Current CBD best practices, concepts, approaches and methods do not provide a full and consistent support for various component concepts, and therefore are not able to provide a full benefit of the CBD paradigm. This paper defines a new approach to components through an Integrated Component- Oriented Framework that provides a comprehensive component-oriented support for enterprise systems development. The framework enables that the same component way of thinking and the same consistent set of technology- independent component concepts can be applied in different aspects of enterprise systems development, from business services to distributed components

Teaching Information Systems Development via Process Variants

Acquiring the knowledge to assemble an integrated Information System (IS) development process that is tailored to the specific needs of a project has become increasingly important. It is therefore necessary for educators to impart to students this crucial skill. However, Situational Method Engineering (SME) is an inherently complex process that may not be suitable for students to apply in a classroom IS development project. SME is defined as the systematic creation of new methods from parts of existing methods, i.e., the method fragments, by taking into account the specific business situation of each IS development project. A less complex pedagogical approach is to teach students how to design an IS development process variant that incorporates the building blocks of various existing processes in order to leverage the advantages of each individual process. This paper first proposes a framework for teaching students the designing of process variants, followed by a preliminary empirical study conducted in a genuine classroom setting to determine whether the framework benefits students. Through the preliminary study, we discuss how the student IS development project teams had successfully applied our framework to design and use their own process variants. The initial observations obtained from the study also suggest that students who designed their own process variant appeared to consistently outperform those who did not, i.e., students which opted to use the traditional waterfall model

An Environment For Specifying and Executing Adaptable Software Components

One of the difficulties of Component Based Software Engineering (CBSE) [1] in reusing pre-existing components is the need to adapt these components to work within the desired target systems [2, 3, 4, 5, 6]. Third-party or in-house Commercial Off-the-shelf (COTS) components may not always have the required exact functionality demanded by the builders of the target system, so these systems have to be either modified [2, 3, 4, 5, 6] or adapted to provide this required functionality. Modifying these components may not be always practically possible. In this thesis, we propose an infrastructure that supports the active interface adaptation technique [3, 8, 9, 10]. This infrastructure directly addresses the problem of effectively packaging components for third-party use, adaptation, and deployment. Doing so we support both component designers and third party application builders. Further we evaluate our approach using several adaptations over the case studies

CREWS : a Component-driven, Run-time Extensible Web Service framework

There has been an increased focus in recent years on the development of re-usable software, in the form of objects and software components. This increase, together with pressures from enterprises conducting transactions on the Web to support all business interactions on all scales, has encouraged research towards the development of easily reconfigurable and highly adaptable Web services. This work investigates the ability of Component-Based Software Development (CBSD) to produce such systems, and proposes a more manageable use of CBSD methodologies. Component-Driven Software Development (CDSD) is introduced to enable better component manageability. Current Web service technologies are also examined to determine their ability to support extensible Web services, and a dynamic Web service architecture is proposed. The work also describes the development of two proof-of-concept systems, DREW Chat and Hamilton Bank. DREW Chat and Hamilton Bank are implementations of Web services that support extension dynamically and at run-time. DREW Chat is implemented on the client side, where the user is given the ability to change the client as required. Hamilton Bank is a server-side implementation, which is run-time customisable by both the user and the party offering the service. In each case, a generic architecture is produced to support dynamic Web services. These architectures are combined to produce CREWS, a Component-driven Runtime Extensible Web Service solution that enables Web services to support the ever changing needs of enterprises. A discussion of similar work is presented, identifying the strengths and weaknesses of our architecture when compared to other solutions