Bøger af Alex Homer

How can you create an application that has truly global reach, and can scale rapidly to meet sudden massive spikes in demand? Historically, companies had to invest in an infrastructure capable of supporting such an application themselves, and plan for peak demand-which often means that much of the capacity sits idle for much of the time. Typically, only large companies would have the available resources to risk such an enterprise. The cloud has changed the rules of the game. By making infrastructure available on a "pay as you go" basis, creating a massively scalable, global application is within the reach of both large and small companies. Yes, by moving applications to the cloud you're giving up some control and autonomy, but you're also going to benefit from reduced costs, increased flexibility, and scalable computation and storage. This guide is the third release of the second volume in a series about Windows Azure. It demonstrates how you can create from scratch a multi-tenant, Software as a Service (SaaS) application to run in the cloud by using the Windows Azure tools and the increasing range of capabilities of Windows Azure. The guide focuses on both good practice design and the practicalities of implementation for multi-tenant applications, but also contains a wealth of information on factors such as security, scalability, availability, and elasticity that are relevant to all types of cloud hosted applications. The guide is intended for any architect, developer, or information technology (IT) professional who designs, builds, or operates applications and services that run on or interact with the cloud. Although applications do not need to be based on the Windows operating system to work in Windows Azure, or be written using a .NET language, this guide is written for people who work with Windows based systems. You should be familiar with the .NET Framework, Visual Studio, ASP.NET MVC, and Visual C#.

How do you build and deploy applications to be scalable and have high availability? Along with developing the applications, you must also have an infrastructure that can support them. You may need to scale up or add servers, have redundant hardware, and add logic to the application to handle distributed computing and failovers-even if an application is in high demand for only short periods of time. The cloud offers a solution. It is made up of interconnected servers located in various data centers, but you see what appears to be a centralized location that someone else hosts and manages. By removing the responsibility for maintaining an infrastructure, you're free to concentrate on what matters most: the application. This guide is the third edition of the first volume in a series about Windows Azure. It demonstrates how you can adapt an existing on-premises ASP.NET application to one that operates in the cloud by introducing a fictitious company named Adatum that modifies its expense tracking and reimbursement system, aExpense, so that it can be deployed to Windows Azure. To illustrate the wide range of options and features in Windows Azure, this guide and the code examples available for it show a step-by-step migration process that includes using Windows Azure Web Sites, Virtual Machines, Cloud Services, and SQL Database. Together with useful information on developing, deploying, managing, and costing cloud-hosted applications, this guide provides you with a comprehensive resource for moving your applications to Window Azure. This book is intended for any architect, developer, or information technology (IT) professional who designs, builds, or operates applications and services that are appropriate for the cloud. Although applications do not need to be based on the Microsoft Windows operating system to work in Windows Azure or written using a .NET language, this book is written for people who work with Windows-based systems. You should be familiar with the.NET Framework, Visual Studio, ASP.NET, and Visual C#.

ASP.NET MAKES IT EASY to create intemctive and intuitive interfaces for Web applica- tions, and attmctive and exciting Web pages. The server-based postback architecture, combined with the comprehensive army of server controls that are provided as part of the .NET Framework, allow developers to quickly build browser-based interfaces for Web sites and Web applications-using much the same event -driven approach as in "e;tmdi- tional"e; executable programs developed in languages like VISual Basic, Delphi, and C++. This is a completely new and different way of working from previous versions of ASP, and the underlying principles and workings of server-based events, which occur in response to actions made by the user in the page, can prove to be difficult to gmsp in their entirety. However, constructing ASP.NET pages, especially with some of the tools that are available or under development now, is very much easier and often less error-prone than in classic ASP. Besides, a completely server-based approach to user interaction does have its downsides. In high-latency scenarios, or over slow network connections, the need to hit the server every time the page content needs to be modified can intrude on the workings of an application or reduce the perceived responsiveness of a Web site.

ASP.NET is a huge advance from previous incarnations of ASP, with one of its goals being pure HTML output that achieves maximum cross-browser compatibility. The server-side event architecture tends to engender this approach, but amid the first flush of excitement its often forgotten that theres still a place for rich clients and handling data in a multitude of places. Distributed data-driven applications arent new, but the range of possibilities and ease of development have both increased with the introduction of .NET.This book approaches data management and data applications from several different points of view: Understanding the new .NET data management philosophy for both relational and XML data Grasping the different techniques that it encompasses and how they relate to real-world requirements Exploring the application architecture and design implications of the .NET data management classes Designing distributed data-driven ASP.NET applications that benefit from the new data management techniques Examining the rich-client philosophy and how .NET can be used to bring this about Demonstrating how easy it is to take advantage of several different types of client devices, providing the best user experience possible for each one  Many books describe the basic techniques for working with data in ASP.NET. However, this book goes not just a step further, but in fact takes you on a complete journey by exploring how to provide the user with the best possible client-side experience when working with data. It also focuses on the server-side design and development process, such as using the n-tier architecture in your applications, and implementing specific techniques, such as correctly managing updates to a data store by multiple concurrent users.