WebSphere Application Server - IBM Redbooks

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Some elements of Example 4-1 on page 62 are discussed below. ► is the root element and encompasses all other elements. ► contains information for a servlet or JSP, including initialization parameters. ► defines a mapping between a servlet and a URL pattern. This allows the servlet to be referenced in the application by a generic name. ► contains an ordered list of welcome files in it. This is useful when a valid partial request is received. In such cases the server appends each welcome file in the order mentioned in this element and sends the request to the first resource that it matches. ► is used to describe each tag library used in the application. Web application archive concept Along with the Web application concept, the Java Servlet Specification 2.3 also specifies a file format named Web archive (WAR) to package Web applications. All the elements contained within a Web application are compressed into a WAR file for deployment. Using WAR files allow Web applications to be packaged in a platform-independent way. 4.2.1 A Web application in an application server Within the server the Web application is rooted at a specific path called the context path. All the requests from clients beginning with this path will be routed to the application. All the Java components of the same Web application share information and have access to the same pool of resources. This information is encapsulated in the servlet context provided by the servlet container. Since there is one and only one servlet context per Web application, servlet instances of a Web application will point to the same ServletContext instance. An application server can contain many Web applications with every Web application rooted to a specific path. The server manages a servlet context for each of these Web applications. The server is responsible for encapsulating the data sent by the client into an HttpServletRequest object. This task includes identifying the following elements, obtained from the client’s request for a URL: ► Context path: The path prefix leading to the Web application. This context path is associated with the servlet context of the application. ► Servlet path: The section of the requested URL that directly corresponds to the mapping that activated this request. Typically, mapping consists of 64 IBM WebSphere Application Server - Express V5.0.2 Developer Handbook
associating a servlet or a resource with a set of URLs. For each request pointing to one of these URLs, the servlet will be invoked. ► Path info: The last part of the URL, not identified as part of the servlet path. The concatenation of these three elements is the request Uniform Resource Identifier (URI) path or URL path. It represents the URL passed by a request to invoke a servlet. For example, http://www.ibmapp.com/OnlineCatalog/Administration/AddNewtem.jsp can be broken down as follows: ► Request URI path: /OnlineCatalog/administration/AddNewtem.jsp ► Context path: /OnlineCatalog (it represents the path prefix where the Web application was deployed) ► Servlet path: /administration/AddNewItem.jsp The servlet will have access to these elements that can be configured on the deployment descriptor or later on the servlet container for each Web application. 4.3 Working with Web applications Studio Site Developer is designed for working with J2EE applications. It has wizards that aid you with creating enterprise and Web modules, including the required directory structure and elements. The deployment descriptors for both are automatically created and maintained. When you need to update the deployment descriptor, an editor just for this purpose is provided. 4.3.1 Creating an enterprise application In Studio Site Developer, all non-static Web projects belong to an enterprise application project. There are several ways to go about creating an enterprise application project: ► Use the Create New Enterprise Application Project wizard. This wizard can be started by selecting File -> New -> Project. Select J2EE in the left pane and Enterprise Application Project in the right. The wizard creates the enterprise application, the deployment descriptor, and the directory structure. You also have the option to create a Web module and/or an application client module. Chapter 4. Working with Web applications 65
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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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Page 36 and 37: From a lower-level perspective, we
Page 38 and 39: 2.1 Design considerations e-busines
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Page 44 and 45: Actors can be identified by asking
Page 46 and 47: The maintain inventory use case has
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Page 50 and 51: In the following sections, we discu
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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
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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
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Page 80 and 81: Elements contained within a Web app
Page 82 and 83: ► A set of initialization paramet
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Page 88 and 89: Figure 4-4 Creating a Web Project 5
Page 94 and 95: ► WebContent: The location of all
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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 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
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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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6.2.9 Testing We have not looked at
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Figure 6-36 Select database and dri
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Figure 6-38 Finished JDBC 8. With t
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Figure 6-40 Data source information
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Figure 6-41 JDBC connection paramet
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Figure 6-43 Server variables page 1
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SQL statement you want to build fro
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7.1 Servlet overview The servlet me
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The service() method is called with
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7.1.3 Servlets in an enterprise app
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Figure 7-3 Package wizard 7. Click
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7.2.2 Web perspective The Web persp
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Figure 7-6 Content assist Content a
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Figure 7-8 Quick Fix Outline view A
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Figure 7-11 Details - URL Mappings
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Figure 7-17 WebSphere extensions 7.
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Figure 7-19 Servlet wizard - screen
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Figure 7-21 Servlet wizard - screen
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Get data from HTML form String user
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7.4 References Some additional refe
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8.1 JSP overview In the early days
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In fact, in WebSphere’s JSP imple
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8.1.3 JSP 1.2 elements The JSP 1.2
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Directives Directives give a way to
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A point of note concerns the sessio
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Note: After deployment to a server,
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The syntax for expression tags is:
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The include action tag works in fas
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Note: You would not have the conten
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The list you see is relevant to the
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Figure 8-7 Outline view Palette vie
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5. You have three options for proce
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In this example, we will be buildin
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Figure 8-11 Adding tag files For ou
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Figure 8-13 Add the JSP to web.xml
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INSERT INTO DB2ADMIN.ITEM( ITE
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9.1 Custom tag library (taglibs) co
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9.1.2 When to use ► Controller lo
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These are: - TagExtraInfo: Provides
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This variable will store the name a
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The TLD contains two main elements,
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It is possible to avoid the need to
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9.2 Studio Site Developer and tag l
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Figure 9-3 Importing a tag library
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3. From the first Import window sel
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Figure 9-7 Adding the Validtag tagl
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9.2.3 Snippets view The Snippets vi
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Page tag library (from Jakarta) The
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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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