A systematic process for exploiting software product lines for game development offers both domain-specific languages and generators streamlined for game subdomains.
Object-oriented frameworks play an important role in different kinds of software, such as product-lines, middleware, GUI components, IDEs, etc. Over the past recent years, fundamentals of framework design stabilized around the adoption of design patterns. However, major difficulties concerning framework learning and usage are still evident, and constitute a burden for those who have to deal with it. This paper proposes an approach that aims to facilitate framework usage, based on the concept of specialization aspect. We show how framework hot-spots can be modularized in terms of specialization aspects, and how these can give support for specializing a framework in a step-wise way. The approach is conservative, in the sense that specialization aspects can be developed for an existing framework "as is". In order to support these claims, a case study has been carried out by applying the technique on the JHotDraw graphical framework.
Crawlers harvest the web by iteratively downloading documents referenced by URLs. It is frequent to find different URLs that refer to the same document, leading crawlers to download duplicates. Hence, web archives built through incremental crawls waste space storing these documents. In this paper, we study the existence of duplicates within a web archive and discuss strategies to eliminate them at storage level during the crawl. We present a storage system architecture that addresses the requirements of web archives and detail its implementation and evaluation. The system is now supporting an archive for the Portuguese web replacing previous NFS-based storage servers. Experimental results showed that the elimination of duplicates can improve storage throughput. The web storage system outperformed NFS based storage by 68% in read operations and by 50% in write operations. 1
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