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Transition smoothly from Java to the most widely used functional JVM-based language - Clojure About This Book * Write apps for the multithreaded world with Clojure's flavor of functional programming * Discover Clojure's features and advantages and use them in your existing projects * The book is designed so that you'll be able put to use your existing skills and software knowledge to become a more effective Clojure developer Who This Book Is For This book is intended for Java developers, who are looking for a way to expand their skills and understand new paradigms of programming. Whether you know a little bit about functional languages, or you are just getting started, this book will get you up and running with how to use your existing skills in Clojure and functional programming. What You Will Learn * Understand the tools for the Clojure world and how they relate to Java tools and standards (like Maven) * Learn about immutable data structures, and what makes them feasible for everyday programming * Write simple multi-core programs using Clojure's core concepts, like atoms, agents and refs * Understand that in Clojure, code is data, and how to take advantage of that fact by generating and manipulating code with macros * Learn how Clojure interacts with Java, how the class loaders work and how to use Clojure from Java or the other way around * Discover a new, more flexible meaning of polymorphism and understand that OOP is not the only way to get it In Detail We have reached a point where machines are not getting much faster, software projects need to be delivered quickly, and high quality in software is more demanding as ever. We need to explore new ways of writing software that helps achieve those goals. Clojure offers a new possibility of writing high quality, multi-core software faster than ever, without having to leave your current platform. Clojure for Java developers aims at unleashing the true potential of the Clojure language to use it in your projects. The book begins with the installation and setup of the Clojure environment before moving on to explore the language in-depth. Get acquainted with its various features such as functional programming, concurrency, etc. with the help of example projects. Additionally, you will also, learn how the tooling works, and how it interacts with the Java environment. By the end of this book, you will have a firm grip on Clojure and its features, and use them effectively to write more robust programs. Style and approach An easy to follow, step-by-step, guide on how to start writing Clojure programs making use of all of its varied features and advantages. As this is a new language, certain new concepts are supported with theoretical section followed by simple projects to help you gain a better understanding and practice of how Clojure works.
A book that brings out the strengths of Clojure programming that have to facilitate machine learning. Each topic is described in substantial detail, and examples and libraries in Clojure are also demonstrated. This book is intended for Clojure developers who want to explore the area of machine learning. Basic understanding of the Clojure programming language is required, but thorough acquaintance with the standard Clojure library or any libraries are not required. Familiarity with theoretical concepts and notation of mathematics and statistics would be an added advantage.
This is a short, practical guide that will teach you everything you need to know to start writing high performance Clojure code.This book is ideal for intermediate Clojure developers who are looking to get a good grip on how to achieve optimum performance. You should already have some experience with Clojure and it would help if you already know a little bit of Java. Knowledge of performance analysis and engineering is not required. For hands-on practice, you should have access to Clojure REPL with Leiningen.
Become an expert at writing fast and high performant code in Clojure 1.7.0 About This Book * Enhance code performance by using appropriate Clojure features * Improve the efficiency of applications and plan their deployment * A hands-on guide to designing Clojure programs to get the best performance Who This Book Is For This book is intended for intermediate Clojure developers who are looking to get a good grip on achieving optimum performance. Having a basic knowledge of Java would be helpful. What You Will Learn * Identify performance issues in Clojure programs using different profiling tools * Master techniques to achieve numerical performance in Clojure * Use Criterium library to measure latency of Clojure expressions * Exploit Java features in Clojure code to enhance performance * Avoid reflection and boxing with type hints * Understand Clojure's concurrency and state-management primitives in depth * Measure and monitor performance, and understand optimization techniques In Detail Clojure treats code as data and has a macro system. It focuses on programming with immutable values and explicit progression-of-time constructs, which are intended to facilitate the development of more robust programs, particularly multithreaded ones. It is built with performance, pragmatism, and simplicity in mind. Like most general purpose languages, various Clojure features have different performance characteristics that one should know in order to write high performance code. This book shows you how to evaluate the performance implications of various Clojure abstractions, discover their underpinnings, and apply the right approach for optimum performance in real-world programs. It starts by helping you classify various use cases and the need for them with respect to performance and analysis of various performance aspects. You will also learn the performance vocabulary that experts use throughout the world and discover various Clojure data structures, abstractions, and their performance characteristics. Further, the book will guide you through enhancing performance by using Java interoperability and JVM-specific features from Clojure. It also highlights the importance of using the right concurrent data structure and Java concurrency abstractions. This book also sheds light on performance metrics for measuring, how to measure, and how to visualize and monitor the collected data. At the end of the book, you will learn to run a performance profiler, identify bottlenecks, tune performance, and refactor code to get a better performance. Style and approach An easy-to-follow guide full of real-world examples and self-sufficient code snippets that will help you get your hands dirty with high performance programming with Clojure.
<p>The Clojure language is a practical alternative for everyday programming that offers expressivity rivaling other dynamic languages like Ruby and Python, but allows one to seamlessly take advantage of Java libraries, services, and all of the resources of the JVM ecosystem. This book helps you learn the fundamentals of Clojure with examples relating it to the languages you know already—whether you're focused on data modeling, concurrency and parallelism, web programming, statistics and data analysis, and more.</p>
If you are a Clojure developer who is interested in using Reactive Programming to build asynchronous and concurrent applications, this book is for you. Knowledge of Clojure and Leiningen is required. Basic understanding of ClojureScript will be helpful for the web chapters, although it is not strictly necessary.
This book is for anyone who's worked with Clojure and wants to use it to start developing applications for the Web. Experience or familiarity with basic Clojure syntax is a must, and exposure to Leiningen (or other similar build tools such as Maven) would be helpful.
This is a hands-on book with plenty of well-explained code. Each chapter has a standalone project in which a complete web application with specific features of a social networking site is emphasized. The final chapter of the book is a project that has a complete and fully developed social networking site. Each chapter begins with a brief description of the features of the Internet service and the market it is within. After extracting the main features of the service, the chapter goes into explaining how a clone of the service can be designed, followed by a short description of the technologies and platforms being used. The bulk of the chapter goes into describing how the clone is built, with step-by-step explanations and code examples. Finally, the chapter shows how the finished clone can be deployed on the Internet. This book is written for web application programmers with an intermediate knowledge of Ruby. You should also know how web applications work and you have used at least some of the cloned Internet services before. If you are a trying to find out exactly how can you make your very own customized applications such as TinyURL, Twitter, Flickr, or Facebook, this book is for you. Programmers who want to include features of these Internet services into their own web applications will also find this book interesting.
A candid account of the life of a software engineer who runs her own computer consulting business in San Francisco. What is it about the numerical, seemingly inhuman world of computing that holds such powerful, wholly human allure?
In Closer, Susan Kozel draws on live performance practice, digital technologies, and the philosophical approach of phenomenology. Trained in dance and philosophy, Kozel places the human body at the center of explorations of interactive interfaces, responsive systems, and affective computing, asking what can be discovered as we become closer to our computers--as they become extensions of our ways of thinking, moving, and touching. Performance, Kozel argues, can act as a catalyst for understanding wider social and cultural uses of digital technology. Taking this one step further, performative acts of sharing the body through our digital devices foster a collaborative construction of new physical states, levels of conscious awareness, and even ethics. We re-encounter ourselves and others through our interactive computer systems. What we need now are conceptual and methodological frameworks to reflect this. Kozel offers a timely reworking of the phenomenology of French philosopher Maurice Merleau-Ponty. This method, based on a respect for lived experience, begins by listening to the senses and noting insights that arrive in the midst of dance, or quite simply in the midst of life. The combination of performance and phenomenology offered by Closer yields entwinements between experience and reflection that shed light on, problematize, or restructure scholarly approaches to human bodies using digital technologies. After outlining her approach and methodology and clarifying the key concepts of performance, technologies, and virtuality, Kozel applies phenomenological method to the experience of designing and performing in a range of computational systems: telematics, motion capture, responsive architectures, and wearable computing. The transformative potential of the alchemy between bodies and technologies is the foundation of Closer. With careful design, future generations of responsive systems and mobile devices can expand our social, physical, and emotional exchanges.
Zoey always tries to keep an open mind about clothes. Can she do the same for people, too? Includes "Sew Zoey" blog posts and fashion illustrations.In the eleventh book in the Sew Zoey series, Zoey Webber thinks she's helping when she gives advice to a boy who has a crush on her best friend Kate. Zoey tells him to wear a soccer jersey from Kate's favorite team, assuming that Kate will like him better if he's into sports. Kate finds out and feels betrayed that Zoey thinks she is so closed-minded. Meanwhile, Zoey helps her new friend Sean start a fashion club at school, promising to allow anyone to join. But when someone unexpected shows up to the first club meeting, Zoey struggles to stay true to her ideals and keep her focus on the clothes. Could Zoey be the one who is closed-minded, after all?
This report discusses how policy-makers might address the challenges and risks in respect of the security, privacy and trust aspects of cloud computing that could undermine the attainment of broader economic and societal objectives across Europe.
If you're involved in planning IT infrastructure as a network or system architect, system administrator, or developer, this book will help you adapt your skills to work with these highly scalable, highly redundant infrastructure services. While analysts hotly debate the advantages and risks of cloud computing, IT staff and programmers are left to determine whether and how to put their applications into these virtualized services. Cloud Application Architectures provides answers -- and critical guidance -- on issues of cost, availability, performance, scaling, privacy, and security. With Cloud Application Architectures, you will: Understand the differences between traditional deployment and cloud computing Determine whether moving existing applications to the cloud makes technical and business sense Analyze and compare the long-term costs of cloud services, traditional hosting, and owning dedicated servers Learn how to build a transactional web application for the cloud or migrate one to it Understand how the cloud helps you better prepare for disaster recovery Change your perspective on application scaling To provide realistic examples of the book's principles in action, the author delves into some of the choices and operations available on Amazon Web Services, and includes high-level summaries of several of the other services available on the market today. Cloud Application Architectures provides best practices that apply to every available cloud service. Learn how to make the transition to the cloud and prepare your web applications to succeed.
If your team is investigating ways to design applications for the cloud, this concise book introduces 11 architecture patterns that can help you take advantage of cloud-platform services. You'll learn how each of these platform-agnostic patterns work, when they might be useful in the cloud, and what impact they'll have on your application architecture. You'll also see an example of each pattern applied to an application built with Windows Azure. The patterns are organized into four major topics, such as scalability and handling failure, and primer chapters provide background on each topic. With the information in this book, you'll be able to make informed decisions for designing effective cloud-native applications that maximize the value of cloud services, while also paying attention to user experience and operational efficiency. Learn about architectural patterns for: Scalability. Discover the advantages of horizontal scaling. Patterns covered include Horizontally Scaling Compute, Queue-Centric Workflow, and Auto-Scaling. Big data. Learn how to handle large amounts of data across a distributed system. Eventual consistency is explained, along with the MapReduce and Database Sharding patterns. Handling failure. Understand how multitenant cloud services and commodity hardware influence your applications. Patterns covered include Busy Signal and Node Failure. Distributed users. Learn how to overcome delays due to network latency when building applications for a geographically distributed user base. Patterns covered include Colocation, Valet Key, CDN, and Multi-Site Deployment.
One of the greatest changes in the computing world has been the move to using common, distributed hardware and software to support services, coined cloud computing. We have chosen a selection of the most useful books in cloud computing within this bibliography. First we look at the basics and some of the key concepts and issues that arise in Cloud computing in general. Then we examine how the 'as a service' (aaS) has helped to drive and expand the reach of the cloud deployment environment. Next, the role of different cloud services, both internal to support cloud operations, and externally provided as a part of the web of cloud operational support are covered. Virtualization, the effective division of computing to more essential computing units has helped to make broad-spectrum web services effective and distributed, and is another key driver behind understanding the cloud. Combining both cloud services and existing datacenters is the role of the Hybrid cloud, aiming to take advantage of the best of both worlds. An array of cloud deployment and development platforms are described, covering both public and private cloud services. Throughout the cloud environment security is a major concern, especially when sharing and distributing user and customer data. Finally, the role of development tools and environments are examined, covering both key tools and entire development stacks. So, be sure to take advantage of the books and videos on cloud computing that you will find in the Safari Books Online library.
Cloud computing continues to emerge as a subject of substantial industrial and academic interest. Although the meaning and scope of "cloud computing" continues to be debated, the current notion of clouds blurs the distinctions between grid services, web services, and data centers, among other areas. Clouds also bring considerations of lowering the cost for relatively bursty applications to the fore. Cloud Computing: Principles, Systems and Applications is an essential reference/guide that provides thorough and timely examination of the services, interfaces and types of applications that can be executed on cloud-based systems. The book identifies and highlights state-of-the-art techniques and methods for designing cloud systems, presents mechanisms and schemes for linking clouds to economic activities, and offers balanced coverage of all related technologies that collectively contribute towards the realization of cloud computing. With an emphasis on the conceptual and systemic links between cloud computing and other distributed computing approaches, this text also addresses the practical importance of efficiency, scalability, robustness and security as the four cornerstones of quality of service. Topics and features: explores the relationship of cloud computing to other distributed computing paradigms, namely peer-to-peer, grids, high performance computing and web services; presents the principles, techniques, protocols and algorithms that can be adapted from other distributed computing paradigms to the development of successful clouds; includes a Foreword by Professor Mark Baker of the University of Reading, UK; examines current cloud-practical applications and highlights early deployment experiences; elaborates the economic schemes needed for clouds to become viable business models. This book will serve as a comprehensive reference for researchers and students engaged in cloud computing. Professional system architects, technical managers, and IT consultants will also find this unique text a practical guide to the application and delivery of commercial cloud services. Prof. Nick Antonopoulos is Head of the School of Computing, University of Derby, UK. Dr. Lee Gillam is a Lecturer in the Department of Computing at the University of Surrey, UK.
Do you trust the Cloud? Should you trust the Cloud? 'Cloud Computing' are the words on everyone's lips - it's the latest technology, the way forward. But how safe is the Cloud? Is it reliable? How secure will your information be? Cloud Computing: Assessing the risks looks at these challenges from a real-world perspective, with industry experts . . . . . .
The primary purpose of this book is to capture the state-of-the-art in Cloud Computing technologies and applications. The book will also aim to identify potential research directions and technologies that will facilitate creation a global market-place of cloud computing services supporting scientific, industrial, business, and consumer applications. We expect the book to serve as a reference for larger audience such as systems architects, practitioners, developers, new researchers and graduate level students. This area of research is relatively recent, and as such has no existing reference book that addresses it.This book will be a timely contribution to a field that is gaining considerable research interest, momentum, and is expected to be of increasing interest to commercial developers. The book is targeted for professional computer science developers and graduate students especially at Masters level. As Cloud Computing is recognized as one of the top five emerging technologies that will have a major impact on the quality of science and society over the next 20 years, its knowledge will help position our readers at the forefront of the field.
The complete reference guide to the hot technology of cloud computingIts potential for lowering IT costs makes cloud computing a major force for both IT vendors and users; it is expected to gain momentum rapidly with the launch of Office Web Apps later this year. Because cloud computing involves various technologies, protocols, platforms, and infrastructure elements, this comprehensive reference is just what you need if you?ll be using or implementing cloud computing.Cloud computing offers significant cost savings by eliminating upfront expenses for hardware and software; its growing popularity is expected to skyrocket when Microsoft introduces Office Web AppsThis comprehensive guide helps define what cloud computing is and thoroughly explores the technologies, protocols, platforms and infrastructure that make it so desirableCovers mobile cloud computing, a significant area due to ever-increasing cell phone and smartphone useFocuses on the platforms and technologies essential to cloud computingAnyone involved with planning, implementing, using, or maintaining a cloud computing project will rely on the information in Cloud Computing Bible.
The easy way to understand and implement cloud computing technology written by a team of experts Cloud computing can be difficult to understand at first, but the cost-saving possibilities are great and many companies are getting on board. If you've been put in charge of implementing cloud computing, this straightforward, plain-English guide clears up the confusion and helps you get your plan in place. You'll learn how cloud computing enables you to run a more green IT infrastructure, and access technology-enabled services from the Internet ("in the cloud") without having to understand, manage, or invest in the technology infrastructure that supports them. You'll also find out what you need to consider when implementing a plan, how to handle security issues, and more. Cloud computing is a way for businesses to take advantage of storage and virtual services through the Internet, saving money on infrastructure and support This book provides a clear definition of cloud computing from the utility computing standpoint and also addresses security concerns Offers practical guidance on delivering and managing cloud computing services effectively and efficiently Presents a proactive and pragmatic approach to implementing cloud computing in any organization Helps IT managers and staff understand the benefits and challenges of cloud computing, how to select a service, and what's involved in getting it up and running Highly experienced author team consults and gives presentations on emerging technologies Cloud Computing For Dummies gets straight to the point, providing the practical information you need to know.
This important text provides a single point of reference for state-of-the-art cloud computing design and implementation techniques. The book examines cloud computing from the perspective of enterprise architecture, asking the question; how do we realize new business potential with our existing enterprises? Topics and features: with a Foreword by Thomas Erl; contains contributions from an international selection of preeminent experts; presents the state-of-the-art in enterprise architecture approaches with respect to cloud computing models, frameworks, technologies, and applications; discusses potential research directions, and technologies to facilitate the realization of emerging business models through enterprise architecture approaches; provides relevant theoretical frameworks, and the latest empirical research findings.
As more businesses move their IT systems into the cloud, lawyers need to ask if cloud computing is right for their firm. Cloud Computing for Lawyers features a discussion of cloud computing fundamentals, an overview of legal cloud computing products, and step-by-step instructions for implementing cloud computing in your practice--including practical tips for securing your data.
Leverage the power of the Azure Services Platform for cloud computingWith the Azure Services Platform, processing and storing data moves from individual corporate servers and Web sites to larger, more reliable, and more secure data centers. Roger Jennings, author of more than 30 books on Microsoft technologies, shows you how to leverage the power of Azure and its related services for cloud computing.The book begins with a look at the differences between cloud computing and application hosting and examines the various issues that .NET developers and IT managers face in moving from on-premise to cloud-based applications, including security, privacy, regulatory compliance, backup and recovery, asset cataloging, and other common technical issues. The author then drills down, showing basic programming for individual Azure components, including storage, SQL Data Services, and .NET Services. He then moves on to cover more advanced programming challenges.Explains the benefits of using the Azure Services Platform for cloud computingShows how to program with Windows Azure components, including Azure Table and Blob storage, .NET Services and SQL AzureAddresses advanced programming challenges of creating useful projects that combine cloud storage with Web applications or servicesCompanion Web site features complete, finished applications that can be uploaded to jump start a Windows Azure projectRoger Jennings clears away the clouds and gets you started using the Azure Services Platform.