Web Tier | IBM Version 5 specs

Presently, Web services theoretically need to support a multitude a browsers. The data sent to the browsers would be common to all, but the presentation of the data could be dependent on the browser. In effect, the presentation of the data could be PDA or even a mobile phone.

An XSLT stylesheet is a XML document. A XSLT processor transforms one or more XSLT stylesheets. Typically, in a Java and XSLT based Web application, Java is used to access the data from the database. XML data is then generated dependent on the data. With the latest release in database technologies, some databases have now the ability to export the data into XML. However, usually programmers write the code to extract the data and convert it into XML.

The processes takes the XML file as one input, and the XSLT stylesheet as the second input, and produces a third output, which is usually HTML, but could be another XML document. The XML file has the data to be presented while the XSLT stylesheet details the logic of how the output data is to be presented.

	Web Tier
Web Browser
		Presentation Data
HTML	XSLT	XML Data
	XSLT	XML Data
	Processor	Database
	Processor
	XSLT StyleSheet
	Presentation Logic

Figure 1-1 XSLT and Web applications

A Web application is an application with its presentation layer (or user interface) on the World Wide Web. These applications display graphics, text, and animation. It tends to be custom made and uses a host of technologies like browsers, databases, and programming languages to name a few. Because of the number of technologies and the skills sets required of its designers and developers, Web applications have to be modular. While the graphic designer concentrates on the HTML user interface, the database programmer focuses on extracting the correct data. A Java programmer might be working on the Web tier.

12 The XML Files: Development of XML/XSL Applications Using WebSphere Studio

Image 28

IBM Version 5 manual Web Tier

Contents

XML Files Page International Technical Support Organization First Edition December Contents XML Collection Contents Part 4. Appendixes Abbreviations and acronyms Page Copyright License Trademarks Cics Preface Team that wrote this redbookPage Become a published author Comments welcomePage Part Page XML overview XML concepts Background XML business benefits Information sharing XML within an organization Technical benefits of XML XML in new innovationsVoice XML Scalable Vector Graphics Acceptability of use for data transfer Uniformity and conformitySimplicity and openness Separation of data and display Extensibility XML historyIndustry acceptance XML1.0 Xslt and Web applications Web Tier Web services and XML Interaction of Web services XML, W3C, and IBM Recommendations Working drafts in developmentPage Technologies in XML XML Processor parser Tree-based parsing DTD and XML Schema Event-based parsingPage Schema and style using CSS, XSLT, and XSL Cascading Style Sheet CSS XML namespaces Example 2-1 a namespace example Example 2-2 a namespace example using namespace prefix Link and jump using XLink, XPointer, and XML Base Example 2-3 a simple link Example 2-4 An extended link Example 2-5 An example of extended links using xbase XML Base XML Pointer XPointer paths and steps XPointer range functions XPointer string functions XPath Example 2-6 An XPath example XML digital Book Library Technologies in XML Example 2-7 Information on passenger John Smith Examples of XML encryptionExample 2-8 Encrypted Information on passenger John Smith Example 2-9 Encrypting only the credit card number Example of a XML digital signatureExample 2-10 Encryption of the whole document Example 2-11 An XML digital signature TransformsExample 2-12 Part encryption of an XML document Example 2-13 The final XML document after encryption Other security specifications XML query language Path expressions Element constructors FLWRFOR, LET, Where and Return clauses expression Conditional expressions if then Else Quantifiers Filtering Example schema for relational database and Xquery comparison Querying relational data Grouping in XQuery Joins Xslt compilers Xsltc Xslt interpreters For more details, visit Using XSLTCThe Apache XML Project at Java Architecture for XML Binding Jaxb Cocoon Transformers and actions processing steps Generators and reader pipeline inputsSerializer pipeline outputs Sitemap Matchers and selectors conditional processingExample 2-14 Sample sitemap for Cocoon Example 2-15 Components of a sitemap XML file Part 2 XML technology in IBM WebSphere Page Processing XML XML applications Xalan Xalan model of operation SAX2 Javax.xml.transforms interfaces operation Example 3-1 Sample XML document Example 3-2 Sample event breakdown SAX2 classes and interfaces Example 3-3 SAX2 callback methods XML namespace supportExample 3-4 Sample namespace DOM level2 DOM hierarchy Example 3-5 Sample XML document Sample generated DOM tree Jaxp Using Jaxp Example 3-6 Sample XML to Html transformation code Xslt support packages in Jaxp Stylesheet compilation Introduction to IBM WebSphere Application Developer WebSphere Studio product family WebSphere Studio family WebSphere Studio Site Developer Advanced WebSphere Studio Application Developer WebSphere Studio Application Developer Integration Edition WebSphere Enterprise Developer Tools Web development tools Relational database tools XML tools Web services development tools Java development tools Team collaboration EJB development toolsDebugging tools Server tools for testing and deployment Performance profiling tools Plug-in development tools Plug-in projectFragment project Plug-in component Application Developer XML Tools XML perspective Window-Open Perspective-XML XML perspective editors XML editorCreating an XML file from scratch Select the option Create XML file from scratch Editing an XML file XML editor Validating the XML file DTD editorCreating a DTD from scratch Using the Outline view to add DTD components DTD Editor XSD editor Creating a schema from scratchValidating DTD Using the Outline view to add schema components XML Schema Editor Pop-up on schema file in the Outline view Making changes and referential integrity Validating schema Namespace XSL editor Creating an XSL file from scratch Editing an XSL file Namespace supportValidating the XSL file Indicate all local elements to be qualified XPath support XPath Builder 10 XPath definition 11 XPath Operators 12 XPath functions XSL debugger 13 XPath Query Result screen 14 XSL Debugger Web Service Dadx group configuration wizard Web services supportWeb service wizard Application Developer XML Tools Page RDB and XML integration 101 SQL to XML wizards Passenger List Select statement SQL to XML wizard panel XML and XSL files Show table column as optionExample 6-1 XSL file for Show table columns as ‘Elements’ Html XML file generated with the Elements option Html file Html with the ‘Recurse through foreign keys’ unchecked Html generated for Foreign key as links option XML Schema file Aircraft Html generated for ‘Foreign key as links’ option RDB and XML integration 076/schema Sequence Example 6-4 XML Schema for Aircraft table DTD file Page Query template file Flight Cdata #REQUIRED Statement Options XML to SQL wizard Example 6-9 Customer.xml XML to SQL wizard Selecting the connection 10 XML to SQL wizard Selecting Schema and Action DDL to XML Schema wizard 11 XML to SQL wizard Selecting the column 12 Generate XML Schema Example 6-10 XML Generated through the DDL to XML Schema Restriction base=string length value=30 SimpleType Element Example 6-11 XML Schema for a single table using a Select DB2 XML Extender XML Extender 13 shows an overview of the XML Extender Administrative support tables created Administrative support tables, UDTs, and UDFsUDTs created Stored Procedures created UDFs created DTD Repository Document Access Definitions DAD Example 6-12 DTD representation of a bookPage When to use XML Column method XML Column method As is xml document Elements/attributesXML Collection When to use XML Collection method 15 XML Collection Method overview Mapping schemes for XML collections Example 6-14 Sample DTD SQL mapping Employee table in Sample database Column name Data type Empact Table in Sample database RDBnode for the top elementnode Example 6-16 The RDBnode RDBnode for each attribute and textnode XML Extender administration toolsExample 6-17 RDBnode mapping XML MQSeries enablement RDB and XML integration Page 145 DTD XSD Select passengerList.dtd Right-clickGenerate-XML SchemaClick Finish XML DTD/XSD Create an XML file from a DTD file Create an XML file from an XSD file Create DTD/XSD files from XML Select Select file from Workspace optionSelect passengerList.xsd Right-clickGenerate-XML File Example 7-1 Customer.xml Select customer.xml Right-clickGenerate-DTD Select Customer.xml Right-clickGenerate-XML SchemaExample 7-2 Customer DTD Select passengerList.xsd file Right-clickGenerate-HTML Doc Generate a Html from an XSDExample 7-3 Customer.xsd Click File-New-Project JavaBeans from DTD/XSDSelect J2EE Web Application Project. Click Next Generate XML/XSL from JavaBeans Select passengerList.xsd Right-clickGenerate-JavaBeansSelect Generate sample test program. Click Finish Example 7-4 passenger.javaPage Click File-New-Java Bean XML Client Input XML Form screen Generate XML/XSL from Html Click File-New-Other Preparing the Html file for generation Adding annotation tags Example 7-5 cus-template.xhtml Select Customer.xhtml. Click Next Select cus-template.xhtml Right-clickGenerate-XSL FileExample 7-6 Customer.xml Page Part 3 XML application development 161Page WebSphere and XML approaches 163 XML in Application development Web services Passenger List application Solution Outline Web Services ServletXML in this application Client Web Tier Technical implementation overview Development and running of the Passenger List applicationPage Advantages of using the database Discussion Enterprise JavaBeans Interprise Application Server Customer Registration application Technical overview Page Developing XML Web services 177 Creating the Web tier Servlet Create the Airline simple project Name Type Select File-New-XML Schema Design the XML SchemaCreate the Travel Web project Select root node PassengerList DOM Tree Creating XML Schema XML Schema Example 9-1 PassengerList.xsd Generate XML file Design an outputHtml and mapping approach Example 9-2 Static XML file Example 9-3 html.dtd Select required and optional content, click FinishExample 9-4 html.xml source Generate an XSL file XML to Html mapping Mapping XML to Html Source Target Create an XSL from scratch Generating XSL from Xhtml Testing the XSL Developing the servlet Javax.xml.transform.Source Example 9-5 GetPassengerList Server doGet method Test the passenger list application Compiling XSLJavax.xml.transform.TranfrormerFactory Javax.xml.transform.Transformer Creating a Web service 11 XML Web service Create the database tier Click Window-Open Perspective-DataRight-clickNew Connection Right-clickImport to folder Generate DTD file PassengerList.xsd-Generate-DTD Figure Loading DTD into XML Extender 13 Generated DTD File Membership Creating DAD file using RDB to XML mappingSelect RDB Table to XML Mapping, click Next Click Mapping-Edit Join Conditions 15 Edit Join Conditions Select passengerList.rmx 16 RDB to XML mapping Create the Web Service from Dadx file DAD Extension Web services and DB2 XML Extender Dadx Group Group.properties File Generating the Dadx Next Dadx operations 18 Dadx Generation RetrieveXML Example 9-6 Updated Dadx file Deploying the Web serviceStoreXML 19 Web Service settings Example 9-7 namspacetable mapping entry Test the Web Service 20 Testing Web Service Modify passenger list application to use the Web Service Mapping DTDIDs to XSD namespaces and locations Modifying the XSL file Example 9-8 NamespacesExample 9-9 Changing root element Example 9-10 passengerList.xslPage Creating Html input form Center Using Java proxy 22 Input form GetPassengerList.html Conclusion 23 passengerList resultPage Development of XML-based Enterprise applications 215 Multi-tier solution architecture XML based Enterprise application architecture Solution outline for customer registration sample Customer registration Retrieving customer information Customer registration scenario outline Developing the customer registration sample Retrieving customer data scenario outline Preparing to create the Web tier JavaBean to XML client wizard Customer JavaBean class specification Creating the Web tier JavaBean XML/XSL client wizard JavaBean XML/XSL client JavaBean selection JavaBean XML/XSL client methods and properties selection JavaBean XML/XSL client input form design 10 JavaBean XML/XSL client results form design 11 JavaBean XML/XSL client prefix specification Investigating the Web-tier generated filesPage ProduceDOM Document Org.w3c.dom.DocumentJava Bean XML Data Example 10-2 Source code for CustomerXSLServlet init method Development of XML-based Enterprise applications XML Document ProduceDOMDocumentXslt Processor Stylesheet Transformer Example 10-4 Source code for the servlet doPost method Form action=/Registration/CustomerXSLServlet method=post Membership Example 10-10 Sample of CustomerResult stylesheet form Example 10-12 Schema file for the XML data Validating the Web tier Building the entity EJB and the database schema 15 Customer registration form Project configuration EJB mapping approaches reviewPreparing to create the entity EJB Creating the entity EJB 17 Create an Enterprise Bean wizard Creating the database mapping and tables 18 Enterprise bean details 19 EJB to RBD Mapping wizard for CustomerInfo module 20 Target database specification 21 EJB to RDB mapping editor Access beans 22 Database connection definition Creating an access bean for the entity bean 23 Access Bean creation wizard Creating a Jdbc data source 24 Data source definition for a server configuration Binding the EJB to a Jdbc data source 25 Jdbc data source definition Integrating the entity EJB with the Web tier Modifying CustomerXML 27 CustomerInfoWeb project properties Example 10-13 create source code Modifying CustomerXSLServlet Example 10-14 CustomerXSLServlet doPost source code Application deployment and testing Retrieval functionExample 10-15 Retrieval function Example 10-16 Confirming the creation Testing the registration application 28 Generating the deployed code for the EJB 29 Customer Registration form Page Light weight XML-based Enterprise Application 257 SQL-XML solution architecture SQL to/from XML libraries Light weight XML-based Enterprise Application Customer registration Retrieving customer information XSL Servlet Adding the libraries to the project XML Document format XMLToSQL architecture Converting an XML Document Initializing the XMLToSQL class Modifying CustomerXSLServletXMLToSQL Modifying the produceDOMDocument method Creating an XML DocumentExample 11-1 initSQLProperties method We need to change to Example 11-2 ProduceDOMDocumentforTools Executing the XMLToSQL class Example 11-3 CustomerXSLServlet doRegister method Example 11-4 CustomerXSLServlet doPost method Modifying the doPost methodExample 11-5 The xslif tag Adding the error case Example 11-6 Customer.XSL firstname template Retrieving a customer JdbcDriverStatement Format SQLToXML Initializing the SQLToXML classExample 11-7 initQueryProperties method Executing the SQLToXML class Example 11-8 CustomerXSLServlet doQuery method Example 11-9 CustomerXSLServlet doPost method for query Modifying the showPage methodExample 11-10 showPage method Example 11-11 showPage method Modifying the doGet methodExample 11-12 Customer.XSL membership template Example 11-13 Result XSL Page Using datasource with SQLToXML and XMLToSQL class Customer Registration form Class definition Getting the datasource Example 11-14 setDatasourceMethods ConstructorsExample 11-15 setDatasourceMethods Execute methods Conclusion 11 Core data is an XMLPage Deploying your Web application 283 Manual deployment Exporting your project from Application Developer Installing the EAR file on WebSphere AEs Starting the WebSphere AEs Admin Console Installing the EAR Select Enterprise Applications Testing the application Publishing to a remote server AEs Creating a remote server instance Creating a remote server instance WebSphere Studio Application Developer Programming Guide Remote server instance settings Remote file transfer option Remote copy options WebSphere Studio Application Developer Programming Guide Publishing to remote server WebSphere Studio Application Developer Programming Guide Part 4 Appendixes 297Page 299 Things to do before installation Installing Application Developer WebSphere Studio Application Developer installation Selecting your workspace Select options Verifying the installation Programs-IBM WebSphere Studio Application Developer-IBM WebSphere Studio Application Developer Programming Guide 305 Hardware and software prerequisites Create groups and users Check that IP ports are unused Install WebSphere Application ServerStop the Web server processes 10 Installation options 11 Security options 12 Snoop servlet accessed through embedded Web server Locating the Web material Using the Web material311 How to use the Web material System requirements for downloading the Web material Abbreviations and acronyms 313 OTS IBM Redbooks Referenced Web sitesOther resources 315 How to get IBM Redbooks IBM Redbooks collections Index 317 Jaxp Wsaa Xacml Xsltc 48 Spine 475-0.875 250 459 pages Page Page XML Files