Software Engineering for Internet Applications - Student Community

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If your interest in this book stems from the desire to build astraightforward ecommerce site, don't despair. It turns out that themost successful ecommerce and collaborative commerce sitesare, at their core, actually online communities. Amazon is the bestknown example. In 1995 there were dozens of online bookstoreswith comprehensive catalogs. Amazon had a catalog but, with itsreader review facility, Amazon also had a mechanism for users tocommunicate with each other. Thus did the programmers atAmazon crush their competition.As you work through this book, you're going to build an onlinelearning community. Along the way you'll pick up all the importantprinciples, skills, and technologies for building desktop Web, mobileWeb, and voice applications of all types.More• on GPRS: "Emerging Technology: Clear Signals for GeneralPacket Radio Service" by Peter Rysavy in the December2000 issue of Network Magazine, available athttp://www.rysavy.com/Articles/GPRS2/gprs2.html• on the state-of-the-art in easy-to-build Voice applications:Chapter 10 on VoiceXML (stands by itself reasonably well)results and whether the numbers could have been predictedfrom the page flow and HTML designs.• Week 6, Meeting 2: Students present their refineddiscussion forum systems. Class time devoted topresentation of the refined systems. Close with anexhortation that students spend the weekend starting theMobile and VoiceXML problems in parallel so that if they arestuck with the tools they'll have an early warning.• Week 7, Meeting 1: Students complete all exercises inMobile chapter. Class time devoted to presentations anddiscussion of the wireless interfaces to the applications.• Week 7, Meeting 2: Students complete all exercises inthe VoiceXML chapter. Class devoted to presentations anddiscussion. It would be very helpful to have an amplifiedtelephone system so that the entire class can hearinteractions between a team's system and a user.• Week 8, Meeting 1: Students complete all exercises inScaling Gracefully chapter. Take-home mid-term examhanded out (an individual rather than a team project).Class discussion of scaling exercises, ideally starting witheach answer being presented by a separate team.• Week 8, Meeting 2: Exercises 1 and 2 from Search due.Discussion of team designs for full-text search.• Week 9, Meeting 1: Mid-term exam due. All exercisesfrom the Search chapter due. Class time devoted todiscussion of exam questions, answers, and implications.• Week 9, Meeting 2: Planning Redux exercises due. Notethat the instructors must interview the clients as part of thischapter. Team presentations of their work and plans forpublic launch.What to put on examsYou might think that exams are unnecessary in a project-orientedcourse such as this one. We give exams for the following reasons:• we want to make sure that a student isn't being carried byhis or her teammates• we want to make sure that students are reading and rereadingthe principles outlined in this textbook• we want to make sure that students understand datamodeling and concurrency10339
you supply English-language queries that they'll have totranslate into SQL against their tables and columns. A groupcan be one project team or two project teams workingtogether. Ideally the classroom will have many separateblackboards. The instructors walk around answeringquestions and coaching the groups. After 30-40 minutes youask two or three of the best groups to present their work.After each presentation you moderate a discussion of themerits of the data model and how much work the RDBMSwill have to do in answering the queries. You close themeeting time by introducing the B-tree index and explaininghow to add indices to a data model to improve queryperformance.• Week 3, Meeting 1: Students turn in their work on UserRegistration and Management. Class time is devoted topresentation and discussion of different teams' approachesto the user registration chapter problems. At least a coupleof teams will have been successful in meeting with theirclients and drafting solutions to the Planning chapter.Devote 5-10 minutes of class time to discussing the work ofthe farthest-along teams in this area as a way of inspiringthe rest of the class.• Week 3, Meeting 2: Students turn in their work onPlanning and Exercises 1 through 3 in ContentManagement (up to but not including the skeletalimplementation). Class time is devoted to presentation anddiscussion of teams' approaches to content managementdata models. Consider breaking up into teams to take asingle-table data model and put it into 3rd Normal Form.• Week 4, Meeting 1: Devoted to look and feel criticism ofpublic Internet applications and the more advanced teams.• Week 4, Meeting 2: Students complete all exercises inContent Management, including client sign-off. Classtime devoted to team presentations of work so far and plansfor immediate future.• Week 5, Meeting 1: Students complete all exercises inSoftware Modularity. Class time devoted to teampresentations of their design decisions and documentation.• Week 5, Meeting 2: Students complete exercises inDiscussion chapter up to but not including the usabilitytest.• Week 6, Meeting 1: Students complete all exercises inDiscussion chapter except execution of the refinementplan. Class time devoted to discussion of usability testChapter 2B a s i cIn this chapter you'll learn how to evaluate Internet applicationdevelopment environments. Then you'll pick one. Then you'll learnhow to use it.You're also going to learn about the stateless and anonymousprotocol that makes Web development different from classical intercomputerapplication development. You'll learn why the relationaldatabase management system is key to controlling the concurrencyproblem that arises from multiple simultaneous users. You'll developsoftware to read and write Extensible Markup Language (XML).2.1 Old-style Communications ProtocolsIn a traditional communications protocol Computer Program A opensa connection to Computer Program B. Both programs runcontinuously for the duration of the communication. This makes iteasy for Program B to remember what Program A has said already.Program B can build up state in its memory. The memory can in factcontain a complete log of everything that has come over the wirefrom Program A.**** insert figure here ****Figure 1: In a traditional stateful communications protocol, twoprograms running on two separate computers establish a connectionand proceed to use that connection for as long as necessary,typically until one of the programs terminates.2.2 HTTP: stateless and anonymousHyperText Transfer Protocol (HTTP) is the fundamental means ofexchanging information and requesting services on the Web. HTTP isalso used when developing text services for mobile phone users and,with VoiceXML, also used to implement voice-controlled applications.The most important thing to know about HTTP is that it is stateless. Ifyou view 10 Web pages, your browser makes 10 independent HTTPrequests of the publisher's Web server. At any time in between thoserequests, you are free to restart your browser program. At any time inbetween those requests, the publisher is free to restart its serverprogram.33811
Page 1 and 2: SoftwareEngineering forInternetAppl
Page 3 and 4: Signature: ________________________
Page 5 and 6: end-users. We use every opportunity
Page 7 and 8: • availability of magnet content
Page 9: • we want to see if a student is
Page 13 and 14: What to do during lecturesWe try to
Page 15 and 16: The one-term cram courseWhen teachi
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Page 21 and 22: has permission to perform each task
Page 23 and 24: UDDIUnixcustomer's credit card. If
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Page 27 and 28: OraclePerlnamed XYZ" without the pr
Page 29 and 30: LDAPLinuxbits per color, a vastly s
Page 31 and 32: FilterFirewallFlat-fileGIF318functi
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Page 37 and 38: Sign-OffsTry to schedule comprehens
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Page 43 and 44: ReferencesEngagement ManagementSQL*
Page 45 and 46: Decision-makers often bring senior
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at 9 hours 11 minutes 59 seconds pa
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found" will result in an access log
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15.18 Time and MotionThe team shoul
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select 227, 891, 'algorithm', curre
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create table km_object_views (objec
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• object-create• object-display
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The trees chapter of SQL for Web Ne
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);274-- ordering within a form, low
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and start the high-level document f
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Example Ontology 2: FlyingWe want a
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systems. What would a knowledge man
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spreadsheet". Other users can comme
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Chapter 15Metadata (and Automatic C
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{site url}{site description}en-usCo
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drawing on the intermodule API that
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At this point you have something of
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• description• URL for a photo
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Here's a raw SOAP request/response
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Chapter 14Distributed Computing wit
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conduct programmer job interviews h
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Most admin pages can be excluded fr
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content that should distinguish one
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Chapter 13Planning ReduxA lot has c
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the Internet-specific problem of no
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wouldn't see these dirty tricks unl
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12.8 Exercise 4: Big BrotherGeneral
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than one call to contains in the sa
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A third argument against the split
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way 1 1/16One might argue that this
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absquatulate 612bedizen 36, 9211cry
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What if the user typed multiple wor
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Chapter 12S E A R C HRecall from th
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long as it is much easier to remove
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features that are helpful? What fea
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made it in 1938)? Upon reflection,
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environment, we identify users by t
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those updates by no more than 1 min
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Balancer and mod_backhand, a load b
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translation had elapsed--the site w
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It seems reasonable to expect that
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11.1.5 Transport-Layer EncryptionWh
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such as ticket bookings would colla
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give their site a unique look and f
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It isn't challenging to throw hardw
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Chapter 11Scaling GracefullyLet's l
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10.15 Beyond VoiceXML: Conversation
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Consider that if you're authenticat
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In this example, we:194• ask the
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As in any XML document, every openi
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(http://www.voicegenie.com). These
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Chapter 10Voice (VoiceXML)questions
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9.15 MoreStandards information:•
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9.14 The FutureIn most countries th
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9.10 Exercise 7: Build a Pulse Page
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9.6 Keypad HyperlinksLet's look at
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text/xml,application/xml,applicatio
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Protocol (IP) routing, a standard H
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