WebSphere Application Server - IBM Redbooks

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A point of note concerns the session attribute. As explained, if the session attribute is set to true, or not specified at all, then the session implicit object variable will reference the HttpSession object for the requesting client. If there is no HttpSession object available, then one will be created explicitly. This can create a performance overhead if your JSP page is not intended to interact with session objects. If this is the case, then you should ensure that the directive tag is included within your JSP. The list in Example 8-3 shows a snippet of JSP source code containing example page directives. Example 8-3 Page directive example Date and time The current date and time is: The include directive The include directive allows content held in other files on the server file system to be included within the JSP page source at translation time. That is, the contents of the included file will be included in the JSP source at the point where the tag is defined and therefore processed by the JSP page compilation procedure. The included file may contain both static content and other JSP tags. The include page directive takes one attribute: file. The file attribute defines a relative URL, or URI, to the file to be included within the JSP page. This URI may be either page or context relative. The included file may contain any valid JSP tags. These tags will be translated to Java source and included in the JSP page compilation class. The rules regarding page directives stated in “The page directive” on page 248 still apply to page directive tags within the included file. A page directive tag contained within the included file will apply to the whole JSP at translation time. Any page directives within the included file that conflict with tags contained in the “including” JSP source will cause compilation time errors. For instance, if a JSP file contains a page directive specifying session=“false”, and then includes another file containing a JSP scripting element referencing the session attribute, a error will occur. 250 IBM WebSphere Application Server - Express V5.0.2 Developer Handbook
One consequence of the fact that the file referenced within the include directive is included during the translation phase is that subsequent changes to the included file will not be picked up by the Web container on subsequent invocations of the JSP. The changes will only be visible when the JSP containing the include directive is itself updated, or its JSP page compilation class is deleted, forcing the translation phase to be carried out. If this behavior is not desirable, you can use the include action tag instead (see “The include action tag” on page 255). Example 8-4 shows an example of using an include directive. Example 8-4 file2.jsp File2.jsp Place File2.jsp The contents of the file to be included, file1.jsp, are shown Example 8-5. Example 8-5 file1.jsp BODY> First File Contents. Chapter 8. Working with JSPs 251
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IBM WebSphere Application Server -
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Take Note! Before using this inform
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2.4.3 JavaServer Pages. . . . . . .
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8.3 Using JSPs in the Online Catalo
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13.1.1 Configuration and management
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16.5.1 Adding JAAS authentication t
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xii IBM WebSphere Application Serve
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Trademarks The following terms are
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Information Systems. His areas of e
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xviii IBM WebSphere Application Ser
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1.1 What is IBM WebSphere Applicati
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► A Web container ► Web service
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1.1.7 Roles and responsibilities In
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► Migrating Applications from IBM
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1.3 Bringing up Studio Site Develop
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illustrates techniques for internat
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Figure 1-4 Customer service example
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From a lower-level perspective, we
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2.1 Design considerations e-busines
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Note: WebSphere Application Server
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Note: WebSphere Application Server
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Actors can be identified by asking
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The maintain inventory use case has
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Input Page (View) Display Page (Vie
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In the following sections, we discu
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Figure 2-9 Dependencies allowed in
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2.4.4 Tag libraries ► Separation
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2.4.7 Struts Struts is an open-sour
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2.5.2 Indexes Third normal form In
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CUSTOMER CUSTOMER_ID :CHAR(10) CUST
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42 IBM WebSphere Application Server
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3.1 The workspace Studio Site Devel
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Figure 3-2 Compare with Local Histo
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Shortcut bar Figure 3-4 Web perspec
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3.2.2 Using fast views 1. From the
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New icon Figure 3-6 Designating a v
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3.3 Finding help ► Select a defau
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The online help is laid out in an e
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4.1 Enterprise application An enter
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Elements contained within a Web app
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► A set of initialization paramet
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Some elements of Example 4-1 on pag
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Although this wizard allows you to
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Figure 4-4 Creating a Web Project 5
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► WebContent: The location of all
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76 IBM WebSphere Application Server
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5.1 HTML support in Studio Site Dev
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Project Navigator view The Project
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2. From the Thumbnails view, drag t
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Colors view Figure 5-5 Setting colo
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Palette view The Web tools Palette
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► Double-Click Support: you can d
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Figure 5-9 Servers view When a serv
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Tip: When you place the cursor with
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Important: Using Web Site Designer
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Important: If a Web page icon has b
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Item Sub Item Category Description
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Figure 5-16 Associated page icon Pa
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Inserting a navigation trail You ca
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Example 5-1 spec.html [ < !-- site
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An example of a page template you w
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d. Select HTML or XHTML as the Mark
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header.html menu.html Figure 5-20 W
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5.1.7 Adding tables, links, text, a
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Figure 5-23 Adding a link These val
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5.1.9 Working with style sheets Sty
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5. Select the Link radio button fro
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the WebArt Gallery tab and the Gall
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Figure 5-27 Using the WebArt Design
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Figure 5-29 Grouping objects You wi
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Figure 5-30 Type of frames Creating
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The animation is played starting wi
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Figure 5-36 WebSphere Studio Animat
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3. To add our company name to the W
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Figure 5-39 Set Selector of New Sty
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Figure 5-41 Add Style dialog 17.Cli
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Figure 5-44 WebSphere Studio Art De
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Figure 5-46 Opening Web Site Design
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Figure 5-49 Creating an HTML page 7
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Figure 5-51 index.html opened in Pa
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Figure 5-53 Runtime of index.html 1
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152 IBM WebSphere Application Serve
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6.1 Java Database Connectivity (JDB
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Using databases in an application i
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6.2.2 Creating the database Althoug
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3. This will open the The New Datab
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Note that the class location points
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Figure 6-7 Create a schema 2. Enter
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SHIPPING_ORDER table The SHIPPING_O
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Figure 6-9 Create the table columns
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The next logical step is to create
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Figure 6-13 Execute the DDL - step
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To access the DB Output view: 1. Cl
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Java package: During the wizard you
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Note: You can use this same process
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Figure 6-20 Select the tables 9. Mo
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Figure 6-22 Database select conditi
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Figure 6-24 The generated SQL state
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Figure 6-26 Defining the controller
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Figure 6-27 Design the input form 7
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Figure 6-28 Design the master view
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Figure 6-30 Renaming the Web pages
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PRICE ASC This does two things.
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In order to run the application usi
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► How credentials are passed to t
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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
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Page 236 and 237: 7.1 Servlet overview The servlet me
Page 238 and 239: The service() method is called with
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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.
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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
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Page 290 and 291: Figure 8-13 Add the JSP to web.xml
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Page 296 and 297: 9.1 Custom tag library (taglibs) co
Page 298 and 299: 9.1.2 When to use ► Controller lo
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Page 310 and 311: Figure 9-3 Importing a tag library
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Tip: If you want to see how the tag
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Each taglib is different and will h
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9.3.2 Step 2: Adding a taglib direc
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2. Select JSP- > Insert Custom... f
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As you are working with taglib code
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10.1 XML overview 10.1.1 XML markup
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Welcome to the ITSO SG24-6555
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10.1.4 Validation A DTD identifies
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It is worth noting that XSDs can be
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Note that the XSD file has to be a
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► Create XML documents from DTDs,
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10.2.2 Wizards Figure 10-3 XML pers
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XSL wizard This is a tool for creat
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Figure 10-4 XML editor The XML edit
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Figure 10-5 Using the XML schema ed
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When you first create a new DTD fro
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10.3 Using XML in the Online Catalo
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Example 10-1 FeaturedItem SQL state
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7. On the next page, select the Cre
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NAME DESCRIPTION PRICE
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Figure 10-13 Libraries tab 5. Click
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5. Verify that the Public modifier
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import java.util.*; import java.net
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Placeholder for xslContent // //Add
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if (paramValues != null) paramValue
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xslContent += ""; xslContent += "";
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Figure 10-18 Web site diagram 6. Cl
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11.1 Web services overview What is
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Service Requestor Internet Figure 1
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► UDDI (universal description, di
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Encoding rules Encoding rules defin
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service. A binding template points
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More information The Web site of th
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Code Generation The Code Generation
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Using the WSDL editor, you can do t
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11.3 Using Web services in the Onli
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Figure 11-8 Web services page a. Ve
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Figure 11-10 Web service selection
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Figure 11-12 Web service test page
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- Proxy: The proxy class makes the
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► WSDL 1.1 specification at: http
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12.1 Struts overview Struts is an o
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When a browser submits an HTML form
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When initialized, the action servle
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Note: Once Struts support has been
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3. Select Add Struts support and JS
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Struts tools You can set the follow
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► Evaluate conditional logic tags
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► Graphical connection format Spe
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► Forwards: A Struts forward is a
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Item Parent Function Icon Draw All
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12.2.5 Wizards To use an action, se
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Figure 12-11 Action wizard - In the
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- If you want to specify a form bea
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- If you want to reuse an existing
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g. If you want to create method stu
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c. Specify the name of the Java pac
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10.On the Design the Form page, you
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Note: The Exception wizard can also
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5. Type the name of the new Struts
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d. If you want to associate the Web
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12.2.8 Data Mappings view The Strut
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Note: We did not follow this sample
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Note: The Web diagram file (*.gph)
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Important: Notice that the icons ar
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Important: Notice that the connecti
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You will notice that there is a war
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Example 12-5 Adding a html text tag
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23.Save your changes and exit the P
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Admin2 page The admin2.jsp page wil
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Figure 12-31 Creating an ActionForm
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The method returns errors if either
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Example 12-13 LoginAction class pub
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Figure 12-35 Local forwards for the
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Example 12-14 LogoutAction class pu
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Important: If you use the Struts fr
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The ActionServlet handles the reque
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13.1 Application server overview We
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Application developer Internet user
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Note: The Web perspective also cont
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13.3 Defining servers and server co
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Figure 13-6 Creating servers and se
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3. Update the server configuration
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13.4.2 Publishing an application to
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Note: If you have not changed the s
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Figure 13-13 Check the console for
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Tip on setting a server preference:
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The following are the steps require
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Figure 13-18 Define the remote serv
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Figure 13-20 Defining the copy sett
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Figure 13-21 Deployed application f
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The server configuration can be ope
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► Trace: Allows you to enable Web
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Note: You can also start the server
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3. Enter the EAR file name to expor
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Example 13-2 IBM Agent settings
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14.1 Debugging in the Web perspecti
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Figure 14-2 500 page error These er
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14.1.4 Editors Note: The Tasks view
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► Standard output: Default color
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Figure 14-7 Debug perspective Break
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Note: For additional information on
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Figure 14-12 Breakpoint properties
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Figure 14-13 Setting a breakpoint i
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Note: For additional information ab
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Figure 14-17 Breakpoint view 14.3.3
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15.1 Team development with CVS CVS
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15.2 Team environment using Studio
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d. Select the connection type (auth
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Note: When you share a project you
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15.4.2 Copy (commit) the project to
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It makes sense to do this when you
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Figure 15-5 Viewing the project ver
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15.6 Working with the team using th
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Figure 15-8 Working with conflicts
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► Current change: In the Text Com
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If there is a conflict, use the Tex
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► Based on the project in your wo
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Tip: You can see existing branch na
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Developer 1 (maintenance developer)
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You will find the following informa
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When such a situation occurs, you w
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Figure 15-16 File (text) compare ed
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16.1 Terms Before starting this top
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Figure 16-1 Web module deployment d
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16.4 Securing applications with rol
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2. Define roles to represent a logi
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Figure 16-4 Add a role Define the c
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Figure 16-6 Adding a constraint 3.
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Assign a role to the constraint Wit
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Figure 16-10 Enterprise application
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Tip: If you are using Internet Expl
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} // get the principal from the req
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Figure 16-13 JAAS security 6. Save
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This configuration allows access to
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Enabling security when installing D
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16.7 Using SSL with applications Th
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Note: For additional SSL informatio
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Wizard The Template application wiz
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Icon Name Description Web Pages Sec
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Figure A-3 Template application pre
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Figure A-5 Template selection 5. Cl
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Figure A-7 Application properties p
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Figure A-9 Database connection page
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- Up moves the widget up within the
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► Different versions of a feature
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Figure B-3 Install configuration vi
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Feature updates view The Feature up
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Figure B-7 Feature install wizard -
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Figure B-9 Feature install wizard -
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Figure B-11 Available updates searc
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Figure B-12 My computer folder 610
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Online Catalog sample application o
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SHIPPING_ORDER table The SHIPPING_O
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Homepage XST file calls Servlet Fig
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Item Folder/Package Description adm
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Catalog Item Folder/Package Descrip
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Note: To add items to the wishlist
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session.setAttribute("att1", o); ..
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Figure C-7 Web site diagram view of
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Figure C-8 theme folder Deployment
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Table C-11 Servlet login items Item
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Item Folder/Package Description Log
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Using the Web material The addition
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Update the FeaturedItemXMLServlet s
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15.On the Create a Resource Propert
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Other resources These publications
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► Java Authentication and Authori
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oker 357 BSF 32 buffer attribute 24
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host variable 184, 187 HTML 60 crea
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460, 466, 522, 527, 529, 540-541 XM
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Session 297-298, 300-301 Sslext 300
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XML schema editor graph view 328 xm
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