物件導向軟體之架構(Object-Oriented Software Construction)探討

Aspect] is a simple and practical aspect-oriented extension to Java With just a few new constructs, AspectJ provides support for modular implementation of a range of crosscutting concerns. In AspectJ's dynamic join point model, join points are well-defined points in the execution of the program; pointcuts are collections of join points; advice are special method-like constructs that can be attached to pointcuts; and aspects are modular units of crosscutting implementation, comprising pointcuts, advice, and ordinary Java member declarations. AspectJ code is compiled into standard Java bytecode. Simple extensions to existing Java development environments make it possible to browse the crosscutting structure of aspects in the same kind of way as one browses the inheritance structure of classes. Several examples show that AspectJ is powerful, and that programs written using it are easy to understand.

An overview of AspectJ

羟氨苄青霉素引起大疱性类天疱疮样疹

The increasing integration of the Internet of Everything into the industrial value chain has built the foundation for the next industrial revolution called Industrie 4.0. Although Industrie 4.0 is currently a top priority for many companies, research centers, and universities, a generally accepted understanding of the term does not exist. As a result, discussing the topic on an academic level is difficult, and so is implementing Industrie 4.0 scenarios. Based on a quantitative text analysis and a qualitative literature review, the paper identifies design principles of Industrie 4.0. Taking into account these principles, academics may be enabled to further investigate on the topic, while practitioners may find assistance in identifying appropriate scenarios. A case study illustrates how the identified design principles support practitioners in identifying Industrie 4.0 scenarios.

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Design Principles for Industrie 4.0 Scenarios

The Object Management Group's (OMG) Model Driven Architecture (MDA) strategy envisages a world where models play a more direct role in software production, being amenable to manipulation and transformation by machine. Model Driven Engineering (MDE) is wider in scope than MDA. MDE combines process and analysis with architecture. This article sets out a framework for model driven engineering, which can be used as a point of reference for activity in this area. It proposes an organisation of the modelling 'space' and how to locate models in that space. It discusses different kinds of mappings between models. It explains why process and architecture are tightly connected. It discusses the importance and nature of tools. It identifies the need for defining families of languages and transformations, and for developing techniques for generating/configuring tools from such definitions. It concludes with a call to align metamodelling with formal language engineering techniques.

Model Driven Engineering

There's growing interest in developing applications for the Internet of Things. Such applications' main objective is to integrate technology into people's everyday lives, to be of service to them en masse. The form in which this integration is implemented, however, still leaves much room for improvement. Usually, the user must set parameters within the application. When the person's context changes, they have to manually reconfigure the parameters. What was meant to be a commodity in an unforeseen situation then becomes extra noise. This article describes a reference architecture that improves how people are integrated with the IoT, with smartphones doing the connecting. The resulting integration opens the way to new IoT scenarios supporting evolution towards the Internet of People.

From the Internet of Things to the Internet of People

Researchers from sociological disciplines could greatly benefit from collective information from the many people who use mobile devices to communicate via various social apps and services. However, processing that information is difficult because it's scattered among numerous social platforms. Furthermore, users are becoming increasingly concerned about how and by whom their information is being accessed. A new mobile-centric computing model allows sociological profiles of people to be generated, kept, and securely provided to third parties as a service. With this model, device owners can be fully aware and in control of how their information is accessed, while still contributing to collective sociological information.

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People as a Service: A Mobile-centric Model for Providing Collective Sociological Profiles

Early analysis of resource consumption patterns in mobile applications

A service-oriented framework for developing cross cloud migratable software

The ability of reusing existing software has always been a major concern of Software Engineering. The reuse and integration of heterogeneous software parts is an issue for current paradigms such as Component-Based Software Development, or Coordination Models and Languages. However, a serious limitation of current approaches is that while they provide convenient ways to describe the typed signatures of software entities, they offer a quite limited support to describe their concurrent behaviour. As a consequence, when a component is going to be reused, one can only be sure that it provides the required interface, but nothing else can be inferred about the behaviour of the component with regard to the interaction protocol required by its environment. To deal with this problem, a new discipline, Software Adaptation, is emerging. Software Adaptation promotes the use of adaptors-specific computational entities guaranteeing that software components will interact in the right way not only at the signature level, but also at the protocol and semantic levels. This paper summarizes the results and conclusions of the First Workshop on Coordination and Adaptation Techniques for Software Entities (WCAT'04).

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Juan Manuel Murillo

Papers

From the Internet of Things to the Internet of People

People as a Service: A Mobile-centric Model for Providing Collective Sociological Profiles

Early analysis of resource consumption patterns in mobile applications

A service-oriented framework for developing cross cloud migratable software

Coordination and adaptation techniques for software entities