WebSphere Application Server - IBM Redbooks

More documents

Recommendations

Info

2.1 Design considerations e-business application design presents some unique challenges compared to traditional application design and development. The majority of these challenges are related to the fact that traditional applications were primarily used by a defined set of internal users, whereas e-business applications are used by a broad set of internal and external users such as employees, customers, and partners. Web applications must be developed to meet the varied needs of these end users. The challenges the Web application developer faces include the following: ► The user experience, look, and feel of the site need to be constantly enhanced to leverage emerging technologies, and attract and retain site users. ► New features have to be constantly added to the site to meet customer demands. ► Such changes and enhancements will have to be delivered at record speed to avoid losing customers to the competition. ► e-business applications in essence represent the corporate brand online. Developers have to ensure that the Web site effectively represents the company image. ► Security requirements are significantly higher for e-business applications compared to traditional applications. In order to execute traditional applications from the Web, a special set of security-related software may be needed to access private networks. 2.1.1 System model for e-business applications A common model for e-business solution development is based on an n-tier distributed environment where any number of tiers of application logic and business services are separated into components that communicate with each other across a network. In its most basic form, the model can be depicted as a “logical” three-tier computing model. This means that there is a logical, but not necessarily physical, separation of processes. This model is designed to support clients with high-function Web applications and servers for small and large enterprises. Figure 2-1 on page 19 shows a high-level system model for running an e-business application. 18 IBM WebSphere Application Server - Express V5.0.2 Developer Handbook
First Tier Middle Tier Third Tier Thin client, Browser Netscape/IE, PDA, Mobile phones, HTML pages, Web TV HTTP(S) Figure 2-1 e-business system model Web server, Application server, Transaction server, Servlets, JSP, Business Logic Beans, Data Access Beans, Connectors 320 TCP/IP Enterprise Information Systems First tier The main function of the client in this model is to present information and results produced by an application to the user. In this system model, the clients are sometimes referred to as thin clients. This means that little or no application logic is executed on the client and, therefore, relatively little software is required to be installed on the client. Clients are implemented with industry-standard technologies, interact with the user, communicate with a middle tier via standard protocols, and send and receive standard data formats. Using the thin client in the model improves manageability, flexibility, and time to market. This is contrary to the fat client, which provides higher computing power and storage capacity at the expense of increased management requirements. Clients can range from pervasive devices, such as PDAs, smartcards, and digital wireless telephones, to network computers and PCs. Chapter 2. Application design 19
Page 1: IBM WebSphere Application Server -
Page 4 and 5: Take Note! Before using this inform
Page 6 and 7: 2.4.3 JavaServer Pages. . . . . . .
Page 8 and 9: 8.3 Using JSPs in the Online Catalo
Page 10 and 11: 13.1.1 Configuration and management
Page 12 and 13: 16.5.1 Adding JAAS authentication t
Page 14 and 15: xii IBM WebSphere Application Serve
Page 16 and 17: Trademarks The following terms are
Page 18 and 19: Information Systems. His areas of e
Page 20 and 21: xviii IBM WebSphere Application Ser
Page 22 and 23: 1.1 What is IBM WebSphere Applicati
Page 24 and 25: ► A Web container ► Web service
Page 26 and 27: 1.1.7 Roles and responsibilities In
Page 28 and 29: ► Migrating Applications from IBM
Page 30 and 31: 1.3 Bringing up Studio Site Develop
Page 32 and 33: illustrates techniques for internat
Page 34 and 35: Figure 1-4 Customer service example
Page 36 and 37: From a lower-level perspective, we
Page 40 and 41: Note: WebSphere Application Server
Page 42 and 43: Note: WebSphere Application Server
Page 44 and 45: Actors can be identified by asking
Page 46 and 47: The maintain inventory use case has
Page 48 and 49: Input Page (View) Display Page (Vie
Page 50 and 51: In the following sections, we discu
Page 52 and 53: Figure 2-9 Dependencies allowed in
Page 54 and 55: 2.4.4 Tag libraries ► Separation
Page 56 and 57: 2.4.7 Struts Struts is an open-sour
Page 58 and 59: 2.5.2 Indexes Third normal form In
Page 60 and 61: CUSTOMER CUSTOMER_ID :CHAR(10) CUST
Page 62 and 63: 42 IBM WebSphere Application Server
Page 64 and 65: 3.1 The workspace Studio Site Devel
Page 66 and 67: Figure 3-2 Compare with Local Histo
Page 68 and 69: Shortcut bar Figure 3-4 Web perspec
Page 70 and 71: 3.2.2 Using fast views 1. From the
Page 72 and 73: New icon Figure 3-6 Designating a v
Page 74 and 75: 3.3 Finding help ► Select a defau
Page 76 and 77: The online help is laid out in an e
Page 78 and 79: 4.1 Enterprise application An enter
Page 80 and 81: Elements contained within a Web app
Page 82 and 83: ► A set of initialization paramet
Page 84 and 85: Some elements of Example 4-1 on pag
Page 86 and 87: Although this wizard allows you to
Page 88 and 89:
Figure 4-4 Creating a Web Project 5
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
► WebContent: The location of all
Page 96 and 97:
76 IBM WebSphere Application Server
Page 98 and 99:
5.1 HTML support in Studio Site Dev
Page 100 and 101:
Project Navigator view The Project
Page 102 and 103:
2. From the Thumbnails view, drag t
Page 104 and 105:
Colors view Figure 5-5 Setting colo
Page 106 and 107:
Palette view The Web tools Palette
Page 108 and 109:
► Double-Click Support: you can d
Page 110 and 111:
Figure 5-9 Servers view When a serv
Page 112 and 113:
Tip: When you place the cursor with
Page 114 and 115:
Important: Using Web Site Designer
Page 116 and 117:
Important: If a Web page icon has b
Page 118 and 119:
Item Sub Item Category Description
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Figure 5-16 Associated page icon Pa
Page 126 and 127:
Inserting a navigation trail You ca
Page 128 and 129:
Example 5-1 spec.html [ < !-- site
Page 130 and 131:
An example of a page template you w
Page 132 and 133:
d. Select HTML or XHTML as the Mark
Page 134 and 135:
header.html menu.html Figure 5-20 W
Page 136 and 137:
5.1.7 Adding tables, links, text, a
Page 138 and 139:
Figure 5-23 Adding a link These val
Page 140 and 141:
5.1.9 Working with style sheets Sty
Page 142 and 143:
5. Select the Link radio button fro
Page 144 and 145:
the WebArt Gallery tab and the Gall
Page 146 and 147:
Figure 5-27 Using the WebArt Design
Page 148 and 149:
Figure 5-29 Grouping objects You wi
Page 150 and 151:
Figure 5-30 Type of frames Creating
Page 152 and 153:
The animation is played starting wi
Page 154 and 155:
Figure 5-36 WebSphere Studio Animat
Page 156 and 157:
3. To add our company name to the W
Page 158 and 159:
Figure 5-39 Set Selector of New Sty
Page 160 and 161:
Figure 5-41 Add Style dialog 17.Cli
Page 162 and 163:
Figure 5-44 WebSphere Studio Art De
Page 164 and 165:
Figure 5-46 Opening Web Site Design
Page 166 and 167:
Figure 5-49 Creating an HTML page 7
Page 168 and 169:
Figure 5-51 index.html opened in Pa
Page 170 and 171:
Figure 5-53 Runtime of index.html 1
Page 172 and 173:
152 IBM WebSphere Application Serve
Page 174 and 175:
6.1 Java Database Connectivity (JDB
Page 176 and 177:
Using databases in an application i
Page 178 and 179:
6.2.2 Creating the database Althoug
Page 180 and 181:
3. This will open the The New Datab
Page 182 and 183:
Note that the class location points
Page 184 and 185:
Figure 6-7 Create a schema 2. Enter
Page 186 and 187:
SHIPPING_ORDER table The SHIPPING_O
Page 188 and 189:
Figure 6-9 Create the table columns
Page 190 and 191:
The next logical step is to create
Page 192 and 193:
Figure 6-13 Execute the DDL - step
Page 194 and 195:
To access the DB Output view: 1. Cl
Page 196 and 197:
Java package: During the wizard you
Page 198 and 199:
Note: You can use this same process
Page 200 and 201:
Figure 6-20 Select the tables 9. Mo
Page 202 and 203:
Figure 6-22 Database select conditi
Page 204 and 205:
Figure 6-24 The generated SQL state
Page 206 and 207:
Figure 6-26 Defining the controller
Page 208 and 209:
Figure 6-27 Design the input form 7
Page 210 and 211:
Figure 6-28 Design the master view
Page 212 and 213:
Figure 6-30 Renaming the Web pages
Page 214 and 215:
PRICE ASC This does two things.
Page 216 and 217:
In order to run the application usi
Page 218 and 219:
► How credentials are passed to t
Page 220 and 221:
6.2.9 Testing We have not looked at
Page 222 and 223:
Figure 6-36 Select database and dri
Page 224 and 225:
Figure 6-38 Finished JDBC 8. With t
Page 226 and 227:
Figure 6-40 Data source information
Page 228 and 229:
Figure 6-41 JDBC connection paramet
Page 230 and 231:
Figure 6-43 Server variables page 1
Page 232 and 233:
SQL statement you want to build fro
Page 234 and 235:
Page 236 and 237:
7.1 Servlet overview The servlet me
Page 238 and 239:
The service() method is called with
Page 240 and 241:
7.1.3 Servlets in an enterprise app
Page 242 and 243:
Figure 7-3 Package wizard 7. Click
Page 244 and 245:
7.2.2 Web perspective The Web persp
Page 246 and 247:
Figure 7-6 Content assist Content a
Page 248 and 249:
Figure 7-8 Quick Fix Outline view A
Page 250 and 251:
Figure 7-11 Details - URL Mappings
Page 252 and 253:
Figure 7-17 WebSphere extensions 7.
Page 254 and 255:
Figure 7-19 Servlet wizard - screen
Page 256 and 257:
Figure 7-21 Servlet wizard - screen
Page 258 and 259:
Get data from HTML form String user
Page 260 and 261:
7.4 References Some additional refe
Page 262 and 263:
8.1 JSP overview In the early days
Page 264 and 265:
In fact, in WebSphere’s JSP imple
Page 266 and 267:
8.1.3 JSP 1.2 elements The JSP 1.2
Page 268 and 269:
Directives Directives give a way to
Page 270 and 271:
A point of note concerns the sessio
Page 272 and 273:
Note: After deployment to a server,
Page 274 and 275:
The syntax for expression tags is:
Page 276 and 277:
The include action tag works in fas
Page 278 and 279:
Note: You would not have the conten
Page 280 and 281:
The list you see is relevant to the
Page 282 and 283:
Figure 8-7 Outline view Palette vie
Page 284 and 285:
5. You have three options for proce
Page 286 and 287:
In this example, we will be buildin
Page 288 and 289:
Figure 8-11 Adding tag files For ou
Page 290 and 291:
Figure 8-13 Add the JSP to web.xml
Page 292 and 293:
INSERT INTO DB2ADMIN.ITEM( ITE
Page 294 and 295:
Page 296 and 297:
9.1 Custom tag library (taglibs) co
Page 298 and 299:
9.1.2 When to use ► Controller lo
Page 300 and 301:
These are: - TagExtraInfo: Provides
Page 302 and 303:
This variable will store the name a
Page 304 and 305:
The TLD contains two main elements,
Page 306 and 307:
It is possible to avoid the need to
Page 308 and 309:
9.2 Studio Site Developer and tag l
Page 310 and 311:
Figure 9-3 Importing a tag library
Page 312 and 313:
3. From the first Import window sel
Page 314 and 315:
Figure 9-7 Adding the Validtag tagl
Page 316 and 317:
9.2.3 Snippets view The Snippets vi
Page 318 and 319:
Page tag library (from Jakarta) The
Page 320 and 321:
Tip: If you want to see how the tag
Page 322 and 323:
Each taglib is different and will h
Page 324 and 325:
9.3.2 Step 2: Adding a taglib direc
Page 326 and 327:
2. Select JSP- > Insert Custom... f
Page 328 and 329:
As you are working with taglib code
Page 330 and 331:
10.1 XML overview 10.1.1 XML markup
Page 332 and 333:
Welcome to the ITSO SG24-6555
Page 334 and 335:
10.1.4 Validation A DTD identifies
Page 336 and 337:
It is worth noting that XSDs can be
Page 338 and 339:
Note that the XSD file has to be a
Page 340 and 341:
► Create XML documents from DTDs,
Page 342 and 343:
10.2.2 Wizards Figure 10-3 XML pers
Page 344 and 345:
XSL wizard This is a tool for creat
Page 346 and 347:
Figure 10-4 XML editor The XML edit
Page 348 and 349:
Figure 10-5 Using the XML schema ed
Page 350 and 351:
When you first create a new DTD fro
Page 352 and 353:
10.3 Using XML in the Online Catalo
Page 354 and 355:
Example 10-1 FeaturedItem SQL state
Page 356 and 357:
7. On the next page, select the Cre
Page 358 and 359:
NAME DESCRIPTION PRICE
Page 360 and 361:
Figure 10-13 Libraries tab 5. Click
Page 362 and 363:
5. Verify that the Public modifier
Page 364 and 365:
import java.util.*; import java.net
Page 366 and 367:
Placeholder for xslContent // //Add
Page 368 and 369:
if (paramValues != null) paramValue
Page 370 and 371:
xslContent += ""; xslContent += "";
Page 372 and 373:
Figure 10-18 Web site diagram 6. Cl
Page 374 and 375:
Page 376 and 377:
11.1 Web services overview What is
Page 378 and 379:
Service Requestor Internet Figure 1
Page 380 and 381:
► UDDI (universal description, di
Page 382 and 383:
Encoding rules Encoding rules defin
Page 384 and 385:
service. A binding template points
Page 386 and 387:
More information The Web site of th
Page 388 and 389:
Code Generation The Code Generation
Page 390 and 391:
Using the WSDL editor, you can do t
Page 392 and 393:
11.3 Using Web services in the Onli
Page 394 and 395:
Figure 11-8 Web services page a. Ve
Page 396 and 397:
Figure 11-10 Web service selection
Page 398 and 399:
Figure 11-12 Web service test page
Page 400 and 401:
- Proxy: The proxy class makes the
Page 402 and 403:
► WSDL 1.1 specification at: http
Page 404 and 405:
12.1 Struts overview Struts is an o
Page 406 and 407:
When a browser submits an HTML form
Page 408 and 409:
When initialized, the action servle
Page 410 and 411:
Note: Once Struts support has been
Page 412 and 413:
3. Select Add Struts support and JS
Page 414 and 415:
Struts tools You can set the follow
Page 416 and 417:
► Evaluate conditional logic tags
Page 418 and 419:
► Graphical connection format Spe
Page 420 and 421:
► Forwards: A Struts forward is a
Page 422 and 423:
Item Parent Function Icon Draw All
Page 424 and 425:
12.2.5 Wizards To use an action, se
Page 426 and 427:
Figure 12-11 Action wizard - In the
Page 428 and 429:
- If you want to specify a form bea
Page 430 and 431:
- If you want to reuse an existing
Page 432 and 433:
g. If you want to create method stu
Page 434 and 435:
c. Specify the name of the Java pac
Page 436 and 437:
10.On the Design the Form page, you
Page 438 and 439:
Note: The Exception wizard can also
Page 440 and 441:
5. Type the name of the new Struts
Page 442 and 443:
d. If you want to associate the Web
Page 444 and 445:
12.2.8 Data Mappings view The Strut
Page 446 and 447:
Note: We did not follow this sample
Page 448 and 449:
Note: The Web diagram file (*.gph)
Page 450 and 451:
Important: Notice that the icons ar
Page 452 and 453:
Important: Notice that the connecti
Page 454 and 455:
You will notice that there is a war
Page 456 and 457:
Example 12-5 Adding a html text tag
Page 458 and 459:
23.Save your changes and exit the P
Page 460 and 461:
Admin2 page The admin2.jsp page wil
Page 462 and 463:
Figure 12-31 Creating an ActionForm
Page 464 and 465:
The method returns errors if either
Page 466 and 467:
Example 12-13 LoginAction class pub
Page 468 and 469:
Figure 12-35 Local forwards for the
Page 470 and 471:
Example 12-14 LogoutAction class pu
Page 472 and 473:
Important: If you use the Struts fr
Page 474 and 475:
The ActionServlet handles the reque
Page 476 and 477:
13.1 Application server overview We
Page 478 and 479:
Application developer Internet user
Page 480 and 481:
Note: The Web perspective also cont
Page 482 and 483:
13.3 Defining servers and server co
Page 484 and 485:
Figure 13-6 Creating servers and se
Page 486 and 487:
3. Update the server configuration
Page 488 and 489:
13.4.2 Publishing an application to
Page 490 and 491:
Note: If you have not changed the s
Page 492 and 493:
Figure 13-13 Check the console for
Page 494 and 495:
Tip on setting a server preference:
Page 496 and 497:
The following are the steps require
Page 498 and 499:
Figure 13-18 Define the remote serv
Page 500 and 501:
Figure 13-20 Defining the copy sett
Page 502 and 503:
Figure 13-21 Deployed application f
Page 504 and 505:
The server configuration can be ope
Page 506 and 507:
► Trace: Allows you to enable Web
Page 508 and 509:
Note: You can also start the server
Page 510 and 511:
3. Enter the EAR file name to expor
Page 512 and 513:
Example 13-2 IBM Agent settings
Page 514 and 515:
14.1 Debugging in the Web perspecti
Page 516 and 517:
Figure 14-2 500 page error These er
Page 518 and 519:
14.1.4 Editors Note: The Tasks view
Page 520 and 521:
► Standard output: Default color
Page 522 and 523:
Figure 14-7 Debug perspective Break
Page 524 and 525:
Note: For additional information on
Page 526 and 527:
Figure 14-12 Breakpoint properties
Page 528 and 529:
Figure 14-13 Setting a breakpoint i
Page 530 and 531:
Note: For additional information ab
Page 532 and 533:
Figure 14-17 Breakpoint view 14.3.3
Page 534 and 535:
Page 536 and 537:
15.1 Team development with CVS CVS
Page 538 and 539:
15.2 Team environment using Studio
Page 540 and 541:
d. Select the connection type (auth
Page 542 and 543:
Note: When you share a project you
Page 544 and 545:
15.4.2 Copy (commit) the project to
Page 546 and 547:
It makes sense to do this when you
Page 548 and 549:
Figure 15-5 Viewing the project ver
Page 550 and 551:
15.6 Working with the team using th
Page 552 and 553:
Figure 15-8 Working with conflicts
Page 554 and 555:
► Current change: In the Text Com
Page 556 and 557:
If there is a conflict, use the Tex
Page 558 and 559:
► Based on the project in your wo
Page 560 and 561:
Tip: You can see existing branch na
Page 562 and 563:
Developer 1 (maintenance developer)
Page 564 and 565:
You will find the following informa
Page 566 and 567:
When such a situation occurs, you w
Page 568 and 569:
Figure 15-16 File (text) compare ed
Page 570 and 571:
Page 572 and 573:
16.1 Terms Before starting this top
Page 574 and 575:
Figure 16-1 Web module deployment d
Page 576 and 577:
16.4 Securing applications with rol
Page 578 and 579:
2. Define roles to represent a logi
Page 580 and 581:
Figure 16-4 Add a role Define the c
Page 582 and 583:
Figure 16-6 Adding a constraint 3.
Page 584 and 585:
Assign a role to the constraint Wit
Page 586 and 587:
Figure 16-10 Enterprise application
Page 588 and 589:
Tip: If you are using Internet Expl
Page 590 and 591:
} // get the principal from the req
Page 592 and 593:
Figure 16-13 JAAS security 6. Save
Page 594 and 595:
This configuration allows access to
Page 596 and 597:
Enabling security when installing D
Page 598 and 599:
16.7 Using SSL with applications Th
Page 600 and 601:
Note: For additional SSL informatio
Page 602 and 603:
Wizard The Template application wiz
Page 604 and 605:
Icon Name Description Web Pages Sec
Page 606 and 607:
Figure A-3 Template application pre
Page 608 and 609:
Figure A-5 Template selection 5. Cl
Page 610 and 611:
Figure A-7 Application properties p
Page 612 and 613:
Figure A-9 Database connection page
Page 614 and 615:
- Up moves the widget up within the
Page 616 and 617:
Page 618 and 619:
► Different versions of a feature
Page 620 and 621:
Figure B-3 Install configuration vi
Page 622 and 623:
Feature updates view The Feature up
Page 624 and 625:
Figure B-7 Feature install wizard -
Page 626 and 627:
Figure B-9 Feature install wizard -
Page 628 and 629:
Figure B-11 Available updates searc
Page 630 and 631:
Figure B-12 My computer folder 610
Page 632 and 633:
Online Catalog sample application o
Page 634 and 635:
SHIPPING_ORDER table The SHIPPING_O
Page 636 and 637:
Homepage XST file calls Servlet Fig
Page 638 and 639:
Item Folder/Package Description adm
Page 640 and 641:
Catalog Item Folder/Package Descrip
Page 642 and 643:
Note: To add items to the wishlist
Page 644 and 645:
session.setAttribute("att1", o); ..
Page 646 and 647:
Figure C-7 Web site diagram view of
Page 648 and 649:
Figure C-8 theme folder Deployment
Page 650 and 651:
Table C-11 Servlet login items Item
Page 652 and 653:
Item Folder/Package Description Log
Page 654 and 655:
Using the Web material The addition
Page 656 and 657:
Update the FeaturedItemXMLServlet s
Page 658 and 659:
15.On the Create a Resource Propert
Page 660 and 661:
Page 662 and 663:
Other resources These publications
Page 664 and 665:
► Java Authentication and Authori
Page 666 and 667:
Page 668 and 669:
oker 357 BSF 32 buffer attribute 24
Page 670 and 671:
host variable 184, 187 HTML 60 crea
Page 672 and 673:
460, 466, 522, 527, 529, 540-541 XM
Page 674 and 675:
Session 297-298, 300-301 Sslext 300
Page 676 and 677:
XML schema editor graph view 328 xm
Page 680:
IBM WebSphere Application Server -
show all

WebSphere Application Server - IBM Redbooks

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?