APPLIED SOFTWARE ARCHITECTURE CHRISTINE HOFMEISTER ROBERT NORD DELI SONI PDF

Linear data structures: Single dimensional and multidimensional Arrays, stacks, queues. Non linear data structures : Trees, Graphs. Static and Dynamic memory allocation : Linked lists , singly linked list, doubly linked list, circular linked list, Insertion, Deletion and traversal on above data structures. Big-Oh notation.

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Start by pressing the button below! The examples are a large war-gaming simulation system, a satellite data collection and distribution system, and a small Java application for telephony. Currently, the work is populated with smaller disjoint examples that illustrate key points in place. The three running examples will for the most part complement, not replace, the smaller examples as a way to lend continuity to the work.

We will have all of the figures and illustrations re-drawn. We need to handle a number of details, such as nailing down internal cross-references, external citations, discussion questions, glossaries, and advice checklists. We also ask you to take a leap of visual faith. We want the book to have a distinctive visual style, and the callouts are adorned with visual icons denoting their content. However, the callouts in this manuscript are poor, temporary attempts by amateurs.

We ask you to use your imagination to see these callouts as they might appear in the final work. Also, in the final work, the sidebars will really be off to the side, so that a reader can more easily skip them or read them at his or her leisure.

As you read this manuscript, please keep the following questions in mind: 1. Clarity: After you read this book, would you be able to produce a software architecture documentation package from it?

If not, what sections lack the necessary clarity or prescriptive detail? Right prescription: Is what we have prescribed within reason? Which parts of what we prescribe would you jettison and why?

What parts of a software architecture documentation package are essential, but overlooked by this book? What parts had too much coverage? Too little coverage? What parts had just the right depth of coverage? Sound organization: Is the book organized and laid out to help a first-time reader? Is the book organized and laid out to help someone find specific information quickly?

What would have helped make information easier to find quickly? Style: Was the book easy to read? Were the call-outs useful, enjoyable, distracting, annoying? What stylistic improvements could you suggest? Favorites: What were your favorite parts of the book and why?

What were you least favorite parts and why? Recommendation: Who will be interested in using this book? Would you recommend this book to a software developer who might have to produce or work from an architecture? Why or why not? We are extremely grateful for your help. There is no significant meaning to the arrows between the boxes. My goal is to create a prescriptive, semi-formal architectural description that can be used as a basis for setting department priorities, parallelizing development, [managing] legacy migration, etc.

A sentence or two about the drawing Of all the metaphors for software architecture, an avian wing is one of the most compelling. It can be shown emphasizing any of a number of structures -- feathers, skeletal, circulatory, musculature -- each of which must be compatible with the others and work towards fulfilling a common purpose.

The feathers are elements that at a glance are replicated countless times across the wing, but upon closer inspection reveal a rich sub-structure of their own, and small but systematic variations so that all feathers are almost alike but no two are identical. The wing exhibits strong quality attributes: lightness in weight, aerodynamic sophistication, outstanding thermal protection.

Its reliability, cycling through millions of beats, is unparalleled. The wing can be said to have behavior, and how it moves determines how the bird flies. In coarse terms, the wing extends, flaps, and retracts, but in finer terms the bird commands movements almost too subtle to see to control pitch, roll, and yaw with exquisite finesse.

We try, and have tried for millennia, to comprehend the wing by examining its parts, from different points of view. But the whole wing is much more than the sum of its elements and structures -- it is in the whole that beauty and grace emerge. The common starling, a good but not a great flier, can slip through the air at 21 body lengths per second with merely nominal effort. Figure 1: A European starling Sturnus vulgaris and a Lockheed SR, two black birds that travel at about the same speed measured appropriately thanks to their superb respective architectures.

Photo on right from www. Permission for both tbd. For software, we can do this. For the wing of a bird, we can only admire the result. How the documentation is organized to serve a stakeholder 2. What the architecture is 3. Why the architecture is the way it is: Rationale Without an architecture that is appropriate for the problem being solved the project will fail.

Even with a superb architecture, if it is not well understood and well communicated -- in other words, well documented -- the project will fail. Not may fail. Will fail. Accordingly, software architecture is at the center of a frenzy of attention these days. A new book about it seems to pop out monthly. In response to industrial need, universities are adding software architecture to their software engineering curricula. It has been the subject of major international conferences and workshops.

The Software Engineering Institute maintains a bibliography of journal and conference papers about software architecture and its population is approaching Rather surprisingly, there is a dearth of practical guidance available that is independent of language or notation for how to capture an architecture.

To be sure, piles of books exist about how to use a particular language -again, UML comes to mind -- but what an architect really needs is guidance in which architecture is the firstclass citizen, with and language is relegated more appropriately to a supporting role. Adapted from [Bass 98].

Much of this book will be about what is meant by elements and relationships, but for now we use this definition emphasize the plurality of structures that exist in architectures. Each structure is characterized by different kinds of elements and relationships, and each structure provides a view of the architecture that imparts a particular kind of understanding.

The architecture serves as the blueprint for both the system and the project developing it. It defines the work assignments that must be carried out by separate design and implementation teams.

The architecture is the primary carrier of system qualities such as performance, modifiability, and security, none of which can be achieved without a unifying architectural vision. Architecture is an artifact for early analysis to make sure that the design approach will yield an acceptable system.

And architecture holds the key to post-deployment system understanding, maintenance, and mining efforts. In short, architecture is the conceptual glue that holds every phase of the project together for all of its many stakeholders.

The most perfect architecture is useless if no one understands it or perhaps worse if key stakeholders misunderstand it. If you go to the trouble of creating a strong architecture, you must go to the trouble of describing it in enough detail, without ambiguity, and organized so that others can quickly find needed information. Otherwise your effort will have been wasted, because the architecture will be unusable.

The goal of this book is to help you decide what information about an architecture is important to capture, and then provides guidelines and notations and gives examples for capturing it. We intend this book to be a practitioner-oriented guide to the different kinds of information that constitute an architecture. We wanted to give practical guidance for choosing what information should be documented, and show with examples in various notations, including but not limited to UML how to describe that information in writing so that others can use it to carry out their architecture-based work: implementation, analysis, recovery, etc.

How one documents depends on how one wishes to use the documentation. We lay out possible end goals for architecture documentation, and provide documentation strategies for each.

We hold that documenting software architecture is primarily about documenting the relevant views, and then augmenting this information with relevant information that applies across views. The heart of the book is an introduction to the most relevant architectural views, grouped into three major families which we call viewtypes along with practical guidance about how to write them down.

Examples are included for each. Once documentation has been created, it should be reviewed before turning it over to those stakeholders who depend on its quality. We give a practical method for reviewing architectural documentation.

The audience for this book includes the people involved in the production and consumption of architectural documentation, which is to say the community of software developers. We believe strongly in the importance of architecture in building successful systems. But no architecture can achieve this if it is not effectively communicated, and documentation is the key to successful communication. We hope we have provided a useful handbook for practitioners in the field. However, it was also written keeping in mind those who digest and use that documentation.

A software architect can provide this book as a companion to his or her documentation, pointing consumers to specific sections that explain documentation organizing principles, notations, concepts, or conventions. We assume basic familiarity with the concepts of software architecture, but also provide pointers to sources of information to fill in the background.

In many cases, we will sharpen and solidify basic concepts that you already may be familiar with: architectural views, architectural styles, and interfaces are all cases in point. Contents and Organization The book is organized into three parts. Part I: Setting the Stage. This part lays the groundwork for the book.

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This content was uploaded by our users and we assume good faith they have the permission to share this book. If you own the copyright to this book and it is wrongfully on our website, we offer a simple DMCA procedure to remove your content from our site. Start by pressing the button below! The examples are a large war-gaming simulation system, a satellite data collection and distribution system, and a small Java application for telephony.

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