Diomidis Spinellis

Georgios Gousios

What are the ingredients of robust, elegant, flexible, and maintainable software architecture? Beautiful Architecture answers this question through a collection of intriguing essays from more than a dozen of today's leading software designers and architects. In each essay, contributors present a notable software architecture, and analyze what makes it innovative and ideal for its purpose. Some of the engineers in this book reveal how they developed a specific project, including decisions they faced and tradeoffs they made. Others take a step back to investigate how certain architectural aspects have influenced computing as a whole. With this book, you'll discover: How Facebook's architecture is the basis for a data-centric application ecosystem The effect of Xen's well-designed architecture on the way operating systems evolve How community processes within the KDE project help software architectures evolve from rough sketches to beautiful systems How creeping featurism has helped GNU Emacs gain unanticipated functionality The magic behind the Jikes RVM self-optimizable, self-hosting runtime Design choices and building blocks that made Tandem the choice platform in high-availability environments for over two decades Differences and similarities between object-oriented and functional architectural views How architectures can affect the software's evolution and the developers' engagement Go behind the scenes to learn what it takes to design elegant software architecture, and how it can shape the way you approach your own projects, with Beautiful Architecture.

Leading Thinkers Reveal the Hidden Beauty in Software Design

Beautiful Architecture

The Open Source Perspective

Code Reading

本書は、オープンソースソフトウェアのソースコードを読み解くことで、そこに存在するさまざまなテクニックやノウハウ、Tipsを習得するためのガイドブックです。実際のソフトウェアのソースコードを参照して「ソースコードを読む力」を習得することで、「美しいソースコードを書く力」が身に付きます。 本書を読むことで、次のようなことがマスターできます。 ・本格的なソフトウェアのコードを読んで理解すること ・ソフトウェア開発をめぐる、多くの重要な概念を本当の意味で理解すること ・大規模なコードを調べるためのノウハウを得ること ・高級言語から低レベルの言語まで、重要なプログラミング言語を一通り読むこと ・現実のソフトウェアプロジェクトの複雑さを理解すること オープンソースソフトウェアにより、コードの職人が書いた良質のコードをいくらでも読める時代です。しかし、単にコードを眺めているだけでは、何の意味もありません。本書では、「どう読めばよいのか」「効率的に読むためにはどうすればよいのか」について、さまざまな面から解説しています。「ドキュメント」（付属ドキュメントやコード内のコメント）を活用したコードの読み方、単純な検索ツールから開発環境付属のツールまで「コードを読むためのツール」の効率的な使い方など、あまり触れられることがないテクニックも、余すところなく紹介してます。 ※本商品は、過去に発行した書籍をプレミアムブックス版として復刊したものです。まつもとゆきひろ氏による「プレミアムブックス版のための序文」、原著者であるDiomidis Spinellis氏による「プレミアムブックス版に寄せて」を追加し、さらに、初版ではカバー裏に掲載されていた「監訳者座談会」を特別付録として収録しています。

オープンソースから学ぶソフトウェア開発技法

Code Reading　プレミアムブックス版

コードの品質も技術だ！ ソフトウェアの品質向上のための福音書、復活！ 本書は『Code Reading』の姉妹編で、コードの「品質」に注目して解説しています。信頼性、移植性、使用性、相互運用性、環境適応性、依存性、保守性といった、システムを「～性」で表す「非機能特性(機能外要求)」、つまり「ソフトウェアの品質」を識別する方法を解説しています。非機能特性について、オープンソースソフトウェアのソースコードを例に、その読み方と書き方を解説しています。解説の手法も『Code Reading』を踏襲しているため、『Code Reading』で学んだ知識を活かして、コードの品質について学ぶことができます。 ソフトウェアの品質については「管理」に焦点を当てて取り上げた解説は数多くありますが、本書ではコードの品質に反映される「品質のテクノロジー」という観点から書かれています。なぜなら、品質を構成する因子は、それを実装したコードのレベルでしか認識できないからです。 コードから非機能特性を判断できるようになれば、ソフトウェアエンジニアとして新たな武器を手に入れたことになります。そして、自分で作成したコードやほかの人が作成したコードについて、品質を評価したり修正したりする場合、これまでとは違う感覚でコードを読むことができるようになっているはずです。また、より優れた実装方法についてを採用し、プロジェクトを適切な方向に進めようとするときにも、この品質に関する役に立ちます。本書には、そういった「ソフトウェアを作る前の知恵」が満載されています。 ※本商品は、過去に発行した書籍をプレミアムブックス版として復刊したものです。鵜飼文敏氏による「プレミアムブックス版のための序文」、原著者であるDiomidis Spinellis氏による「プレミアムブックス版に寄せて」を追加し、さらに、初版ではカバー裏に掲載されていた「監訳者座談会」を特別付録として収録しています。 ※ご注文に応じて制作するオンデマンド(受注生産)書籍です。帯、カバーはついていません。

コードリーディングによる非機能特性の識別技法

Code Quality　プレミアムブックス版

Stephanos Androutsellis-Theotokis

Maria Kechagia

Open Source Software: A Survey from 10,000 Feet provides an overview of the history, development, and applications of open source software (OSS). OSS is software distributed with a license allowing access to its source code, free redistribution, the creation of derived works, and unrestricted use. The history of open source software can be traced back to the 1950s. Open source applications cover most areas of consumer and business software. The organization of open source development projects often differs from proprietary ones in terms of their organizational structure, membership, leadership, contribution policies and quality control. Behind a successful OSS project is its community, ranging from core developers to passive users. The key defining element of open source software is its license, which must satisfy a list of important requirements. There are numerous open source licenses, and they mainly differ in how they treat derived software: some contain provisions that maintain its availability in open source form, while others allow more flexibility. The emergence of open source software is fueling the economy as a whole through its widespread adoption as a cheap alternative to pricey proprietary products and as a driver behind many successful e-business ventures. Open source is also directly affecting specific sectors: the software development industry through competition and new business opportunities; hardware development through lower cost and barriers of entry, consumer-led innovation and policy enforcement difficulties; academia through valuable opportunities for research and student involvement in real-world applications, as well as the availability of software tools and the provision of pioneering new courses. It can lead to new design, production, marketing, and business models, as well as ways to develop large complex software systems in an organic manner. Challenges lie ahead, and problems still need to be overcome, so the potential for future research on OSS is large. More important however is the ability of open source development models to democratize technology and innovation.

A Survey from 10,000 Feet

Open Source Software

Chrissoleon T. Papadopoulos

Michael E. J. O'Kelly

Michael J. Vidalis

This book provides a complete overview of production systems and describes the best approaches to analyze their performance. Written by experts in the field, this work also presents numerous techniques that can be used to describe, model, and optimize the performance of various types of production lines. The book is intended for researchers, production managers, and graduate students in industrial, mechanical, and systems engineering.

Analysis and Design of Discrete Part Production Lines

The digitisation of traditional media formats, such as text, images, video, and sound provides us with the ability to store, process, and transport content in a uniform way. This has led the formerly distinct industries of media, telecommunications, and information technology to converge. Cross-media publishing and service delivery are important new trends emerging in the content industry landscape. Mass-media organizations and content providers traditionally targeted content production towards a single delivery channel. However, recent economic and technological changes in the industry led content providers to extend their brands to cover multiple delivery channels. Following the content industry trend to "create once and publish everywhere"-COPE, a number of architectures, technologies, and tools are currently being developed and deployed to facilitate the automatic conversion of content to multiple formats, and the creation of innovative multi-platform services. This new approach enables the seamless access to information over different network infrastructures and client platforms. This work aims to bring together a cross-disciplinary core of contributors to address the technical and business issues of cross-media publishing and service delivery. The volume is based on papers presented at the conference on Cross-Media Service Delivery-CMSD-2003 that took place in Santorini, Greece in May 2003. Each contribution was reviewed by at least two reviewers-typically three. From the 30 papers that were submitted 20 were selected for presentation at the conference. Those were further "shepherded" by programme committee members to be improved according to the review suggestions.

Cross-Media Service Delivery

Every software developer and IT professional understands the crucial importance of effective debugging. Often, debugging consumes most of a developer’s workday, and mastering the required techniques and skills can take a lifetime. In Effective Debugging, Diomidis Spinellis helps experienced programmers accelerate their journey to mastery, by systematically categorizing, explaining, and illustrating the most useful debugging methods, strategies, techniques, and tools. Drawing on more than thirty-five years of experience, Spinellis expands your arsenal of debugging techniques, helping you choose the best approaches for each challenge. He presents vendor-neutral, example-rich advice on general principles, high-level strategies, concrete techniques, high-efficiency tools, creative tricks, and the behavioral traits associated with effective debugging. Spinellis’s 66 expert techniques address every facet of debugging and are illustrated with step-by-step instructions and actual code. He addresses the full spectrum of problems that can arise in modern software systems, especially problems caused by complex interactions among components and services running on hosts scattered around the planet. Whether you’re debugging isolated runtime errors or catastrophic enterprise system failures, this guide will help you get the job done—more quickly, and with less pain. Key features include High-level strategies and methods for addressing diverse software failures Specific techniques to apply when programming, compiling, and running code Better ways to make the most of your debugger General-purpose skills and tools worth investing in Advanced ideas and techniques for escaping dead-ends and the maze of complexity Advice for making programs easier to debug Specialized approaches for debugging multithreaded, asynchronous, and embedded code Bug avoidance through improved software design, construction, and management

66 Specific Ways to Debug Software and Systems

Effective Debugging

If you are a programmer, you need this book. You've got a day to add a new feature in a 34,000-line program: Where do you start? Page 333 How can you understand and simplify an inscrutable piece of code? Page 39 Where do you start when disentangling a complicated build process? Page 167 How do you comprehend code that appears to be doing five things in parallel? Page 132 You may read code because you have to--to fix it, inspect it, or improve it. You may read code the way an engineer examines a machine--to discover what makes it tick. Or you may read code because you are scavenging--looking for material to reuse. Code-reading requires its own set of skills, and the ability to determine which technique you use when is crucial. In this indispensable book, Diomidis Spinellis uses more than 600 real-world examples to show you how to identify good (and bad) code: how to read it, what to look for, and how to use this knowledge to improve your own code. Fact: If you make a habit of reading good code, you will write better code yourself.

Page 26: How can I avoid off-by-one errors? Page 143: Are Trojan Horse attacks for real? Page 158: Where should I look when my application can't handle its workload? Page 256: How can I detect memory leaks? Page 309: How do I target my application to international markets? Page 394: How should I name my code's identifiers? Page 441: How can I find and improve the code coverage of my tests? Diomidis Spinellis' first book, Code Reading, showed programmers how to understand and modify key functional properties of software. Code Quality focuses on non-functional properties, demonstrating how to meet such critical requirements as reliability, security, portability, and maintainability, as well as efficiency in time and space. Spinellis draws on hundreds of examples from open source projects--such as the Apache web and application servers, the BSD Unix systems, and the HSQLDB Java database--to illustrate concepts and techniques that every professional software developer will be able to appreciate and apply immediately. Complete files for the open source code illustrated in this book are available online at: http://www.spinellis.gr/codequality/

Diomidis Spinellis

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