IT ARCHITECTURES AND MIDDLEWARE BRITTON PDF

It offers a concise overview of middleware technology alternatives and distributed systems. Chris BrittonPeter Bye Snippet view — Currently a system architect for Unisys Corporation, his experience architcetures work in software development centers and field projects around the world. Table of Contents Figures. Information Access and Information Accuracy. Alexa Actionable Analytics for the Web. Written by and for IT professionals, IT Architectures and Middleware, Second Edition, will help you rise above the conflicts of new business objectives, new technologies, and vendor wars, allowing you to think clearly and productively about the particular challenges you face.

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About this title The challenges of designing, building, and maintaining large-scale, distributed enterprise systems are truly daunting. Written by and for IT professionals, IT Architectures and Middleware, Second Edition, will help you rise above the conflicts of new business objectives, new technologies, and vendor wars, allowing you to think clearly and productively about the particular challenges you face.

This book focuses on the essential principles and priorities of system design and emphasizes the new requirements emerging from the rise of e-commerce and distributed, integrated systems.

It offers a concise overview of middleware technology alternatives and distributed systems. Numerous increasingly complex examples are incorporated throughout, and the book concludes with some short case studies. Topics covered include: Key principles of distributed systems: resiliency, performance and scalability, security, and systems management Information access requirements and data consistency Application integration design Recasting existing applications as services In this new edition, with updates throughout, coverage has been expanded to include: Service-oriented architecture concepts Web services and.

NET technology A more structured approach to system integration design "synopsis" may belong to another edition of this title. He has worked in IT for the last twenty-seven years doing a variety of jobs—programming, technical support, system software design, program management, technical consultancy, and even marketing.

More recently he has been spending his time developing an IT modeling tool. Peter Bye has had a long career in IT as a programmer, analyst, and project manager, focusing on telecommunications, transaction processing, and distributed systems.

Currently a system architect for Unisys Corporation, his experience includes work in software development centers and field projects around the world. Peter is a contributor to international standards in systems management, the author of a number of papers on middleware and other IT topics, and a frequent speaker at conferences and other events.

All rights reserved. All of them need to integrate their applications to support faster, more accurate business processes and to provide meaningful, consistent management information. All organizations are struggling to achieve this. One reason for their struggle is that they are caught in the crossfire of an IT vendor war. In one corner is Microsoft Corporation, whose strength is its consistent technical strategy based on the.

NET set of software technologies and the Windows operating system. This group is focusing its resources on the Java environment. This is a battle about who will rule over middleware technology, a battle about how to implement distributed systems. Given the importance of the subject matter, it is a battle for the hearts and souls of IT for the next decade.

Because all large organizations have complex, heterogeneous IT systems that need to be brought together. Vendor wars are only part of the problem. A modeler will design the application with a modeling tool, generate a few programs and a database, and will eventually confront the to him or her trivial question of what platform it will run on.

Modeling to a techy seems abstract and disconnected from reality. One key to developing large distributed systems is to bring these people together. Computer professionals generally are comfortable with developing applications on a single platform to a well-defined set of requirements. The reason is that the technology is well understood; the modelers know that what they design can be implemented, and the techies know they can make it work.

Large distributed systems are not like that. A system designed without consideration for the distributed implementation will not work. To add to our woes, we are now considering integrating multiple systems, each of which was a challenge to develop in the first place, and each of which is changing at a different speed, driven ever faster by the business.

The notion of a "well-defined set of requirements" is not realistic; requirements will always be changing. This book is about IT architecture.

IT architecture provides a framework for discussing implementation design, and it is in these discussions where techies and modelers should meet. Anyone whose roles and responsibilities include IT architect should know everything in this book. Note we said "know," not "agree with. We have assumed that the IT managers in our readership come fro m an IT background not a business background; this book is not an introduction to IT.

So why do IT managers need a book about IT architecture? It is because here so many of their concerns come together—application flexibility, information quality, resiliency, scalability, and so on.

One of our aims is to give IT management the knowledge to call the IT architects to account. This book gives an overview of the whole subject of building and running large distributed systems. Our contention is that the difference between then and now is much more than simply that there are new tools to play with.

Building integrated systems is substantially different from building standalone applications, and it affects everything we do in IT. A major theme of this book is enterprise computing. In the list of terms abused by the industry, "enterprise computing" has to be somewhere near the top. This book takes the view that enterprise computing is about being able to build systems that support the whole enterprise, which in large organizations means many thousands of users.

The enterprise computing mentality is not prepared to compromise on these objectives. An old mainframe application written in COBOL that gives you resiliency, scalability, security, and manageability is far superior to any implementation that does not. This is not to say that you cannot build enterprise-capable applications with modern tools, such as Web services. But to succeed you must understand the principles of building large, resilient systems.

The principles that served us well for standalone applications do not all apply for distributed systems and vice versa. Many people in IT find discussions of principles too abstract and dry, so we have tried to enliven the presentation with many examples. Many organizations today are trying to avoid all these issues by buying third party application packages. This is partially successful.

If you buy many packages, it is likely that you must lash them together somehow, and for this you need an IT architect. If the packages are from different vendors, integration is a challenge.

In this book, we give you the principles that should help in this task, but we have chosen not to address the challenge directly.

Because there are so many packages, to do the subject justice would require another book. This book is not for everyone. You will find this book short on product detail. It does not tell you anything about installation, there are no proper coding examples, there is no survey of products, and there is little in the way of product comparisons.

We make no apologies for any of these omissions. There are many books on coding, and product details change so fast the best place for comparisons is on the Internet. This book does not teach application design. There are many books for this as well. But we hope application designers will read this book because the discussion on the principles for building enterprise systems is vital for them also.

Finally, this book is not an academic book. It contains little mathematics except for the back-of-the-envelope calculations to illustrate a few points. We offer a practical, wide-ranging discussion for IT professionals to help them understand what is going on so they can pick out the real issues from the imaginary issues and start building complex distributed systems with confidence.

Changes in the second edition Changes that led to the second edition fall into three categories: new author, new technology, new approaches to design. First, authorship has now become a team—Peter Bye has joined Chris. Peter brings a long-standing expertise in integration, networking, systems management, and all matters concerned with designing an IT architecture.

Although Peter has concentrated on adding to the technical content in the first part of the book, all parts are mulled over by both of us and authorship is shared. Compare the new text with the old and you will notice small changes scattered everywhere. Second, the book has been updated to take into account new technology, in particular Web services, and consequently new ways of thinking about IT architecture, in particular loosely coupled architectures.

Chris was in the final stages of writing the first edition of the book when Microsoft announced. NET and he had no time to digest the merits of the announcement and incorporate it into the text. When Web services moved toward center stage, it became clear that a fundamental driver was a desire for a more loosely coupled architecture or, more specifically, a loosely coupled integration of tightly coupled archipelagos of system.

The integrated applications architecture described in the first edition of this book was a quintessentially tightly coupled approach. When many people said that they could never reach enough agreement across an organization to impose a tightly coupled architecture, we could see some truth to these complaints.

But loosely coupled integration is impossible without some common standards, and Web services are now providing them. In consequence, our approach to IT architecture is very flexible and we present a range of architectural options such as middleware bus architectures, hub and spoke architectures, and Web services architectures.

The common theme throughout is the notion of service-oriented architectures. In concrete terms, describing Web services and other new technology has led to one new chapter and substantial changes to three others. The third major area of change in this book has to do with design.

As in the technology chapters, the changes in the design chapters are partly in response to changes in the industry. In particular, we have felt the need to discuss agile approaches to development and how they can cooperate with an architectural approach. In particular, we have been able to describe a lightweight approach to integration design and to provide a better view on how the IT architecture supports business processes.

These changes have led to one new chapter and substantial changes to two others. We have also tidied up some of the material on changing existing systems and in the process eliminated one chapter. Also, two of the earlier chapters that discuss the history of middleware have been merged since some of the technology has sunk in importance.

Of course, with all these changes to the body of the book, we needed to rewrite the first and last chapters. In spite of all the changes in the IT industry, it is gratifying to observe how much of the book has remained useful. Although there are substantial changes, we have retained the original structure. The first few chapters are about technology; the middle chapters are about using the technology to meet performance, resilience, security, and system management goals; and the last few chapters are about design.

Organization of this book You can read this book straight through or use it as a reference. This section explains the structure of the book. In addition to introductory and concluding information, the body of the book falls into four main sections: Middleware technology alternatives IT architecture guidelines and middleware Distributed systems technology principles Distributed systems implementation design The thread that holds these topics together is the focus on IT architecture and implementation design.

Introduction Chapter 1, The Problem, is an introduction to the rest of the book.

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IT Architectures and Middleware: Strategies for Building Large, Integrated Systems

Toramar Get fast, free shipping with Amazon Prime. Then you can start reading Kindle books on adchitectures smartphone, tablet, or computer — no Kindle device required. It offers a concise overview of middleware technology alternatives and distributed systems. See my blog for a more detailed review. In this book, Chris Britton offers IT architects and decision-makers practical start-to-finish guidance for defining architectures and choosing middleware strategies that integrate the entire enterprise, maximizing flexibility, resiliency, scalability, security, and manageability. Set up a giveaway.

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About this title The challenges of designing, building, and maintaining large-scale, distributed enterprise systems are truly daunting. Written by and for IT professionals, IT Architectures and Middleware, Second Edition, will help you rise above the conflicts of new business objectives, new technologies, and vendor wars, allowing you to think clearly and productively about the particular challenges you face. This book focuses on the essential principles and priorities of system design and emphasizes the new requirements emerging from the rise of e-commerce and distributed, integrated systems. It offers a concise overview of middleware technology alternatives and distributed systems. Numerous increasingly complex examples are incorporated throughout, and the book concludes with some short case studies.

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