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PWB 519: Development of Web Service in PB 10

PWB 519: Development of Web Service in PB 10. Jin-You Zhu Sr. Software Engineer Jyzhu@sybase.com August 15-19, 2004. The Enterprise. Unwired. The Enterprise. Unwired. Industry and Cross Platform Solutions. Manage Information. Unwire Information. Unwire People.

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PWB 519: Development of Web Service in PB 10

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  1. PWB 519: Development of Web Service in PB 10 Jin-You Zhu Sr. Software Engineer Jyzhu@sybase.com August 15-19, 2004

  2. The Enterprise. Unwired.

  3. The Enterprise. Unwired. Industry and Cross Platform Solutions Manage Information Unwire Information Unwire People • Adaptive Server Enterprise • Adaptive Server Anywhere • Sybase IQ • Dynamic Archive • Dynamic ODS • Replication Server • OpenSwitch • Mirror Activator • PowerDesigner • Connectivity Options • EAServer • Industry Warehouse Studio • Unwired Accelerator • Unwired Orchestrator • Unwired Toolkit • Enterprise Portal • Real Time Data Services • SQL Anywhere Studio • M-Business Anywhere • Pylon Family (Mobile Email) • Mobile Sales • XcelleNet Frontline Solutions • PocketBuilder • PowerBuilder Family • AvantGo Sybase Workspace

  4. Development of Web Service in PB 10 -- Outline • What is Web Services • How to Create Web Services in PB10 • How to Register Web Services in EAServer 5.x • How to Find Web Services in PB10 • How to Write PB Web Services Client in PB10 • How to Write JSP Web Services Client in PB10 • Demo • Q&A

  5. What is Web Services? • Web service is defined as use of Internet technologies to make distributed software components talk to each other. • Available over Internet or private intranet networks -- HTTP • Uses a standardized XML messaging system -- SOAP • Self-describing via a common XML grammar -- WSDL • Discoverable via a simple find mechanism -- UDDI • Not tied to any OS and languages • Separate Web service description from implementation

  6. 3 Key Components of Web Services • WSDL • WSDL stands for Web Services Description Language. It is an XML format for describing network services as a set of endpoints operating on messages containing either document-oriented or procedure-oriented information. http://www.w3.org/TR/wsdl • SOAP • SOAP stands for Simple Object Access Protocol. It is a lightweight protocol for exchange of information in a decentralized, distributed environment. http://www.w3.org/TR/soap12 • UDDI • UDDI stands for Universal Description, Discovery and Integration, it enables businesses to quickly, easily, and dynamically find and transact with one another. http://www.uddi.org

  7. WSDL • Types: • a container for data type definitions using some type system (such as XSD, schema). • Message: • an abstract, typed definition of the data being communicated. • Port Type: • an abstract set of operations supported by one or more endpoints. • Binding: • a concrete protocol and data format specification for a particular port type. • Service: • a collection of related endpoints. • Port: a single endpoint defined as a combination of a binding and a network address.

  8. WSDL – PortType & Binding <portType name="StockQuotesSoap"> <operation name="GetStockQuotes"> <input name="GetQuotes" message="s0:GetQuotesSoapIn" /> <output name="GetQuotes" message="s0:GetQuotesSoapOut" /> </operation> </portType> <binding name="StockQuotesSoap" type="s0:StockQuotesSoap"> <soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" /> <operation name="GetStockQuotes"> <soap:operation soapAction="http://swanandmokashi.com/GetQuotes" style="document" /> <input name="GetQuotes"> <soap:body use="literal" /> </input> <output name="GetQuotes"> <soap:body use="literal" /> </output> </operation> </binding>

  9. WSDL -- Message <message name="GetQuotesSoapIn"> <part name="parameters" element="s0:GetQuotes" /> </message> <message name="GetQuotesSoapOut"> <part name="parameters" element="s0:GetQuotesResponse" /> </message> ….

  10. WSDL -- Types <types> <s:schema elementFormDefault="qualified" targetNamespace="http://swanandmokashi.com"> <s:element name="GetQuotes"> <s:complexType> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="QuoteTicker" type="s:string" /> </s:sequence> </s:complexType> </s:element> <s:element name="GetQuotesResponse"> <s:complexType> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="GetQuotesResult" type=“:string" /> </s:sequence> </s:complexType> </s:element> </s:schema> </types>

  11. WSDL – Services & Ports <service name="StockQuotes"> <port name="StockQuotesSoap" binding="s0:StockQuotesSoap"> <soap:address location="http://www.swanandmokashi.com/HomePage/WebServices/StockQuotes.asmx" /> </port> </service>

  12. SOAP • SOAP is an XML-based protocol for exchanging information between computers • XML-based messaging • Platform- and language-independent • Can be delivered via a variety of transport protocol such as HTTP, FTP, SMTP, and BEEP etc.

  13. SOAP – Request Message <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <SOAP-ENV:Body> <m:GetQuotes xmlns:m="http://swanandmokashi.com"> <m:QuoteTicker>SY</m:QuoteTicker> </m:GetQuotes> </SOAP-ENV:Body> </SOAP-ENV:Envelope>

  14. SOAP – Response Message HTTP/1.1 200 OKContent-Type: text/xml; charset="utf-8"Content-Length: nnnn<SOAP-ENV:Envelopexmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/> <SOAP-ENV:Body> <m: GetQuotesResponse xmlns:m="Some-URI"> < GetQuotesResult >18.0</ GetQuotesResult > </m: GetQuotesResponse > </SOAP-ENV:Body></SOAP-ENV:Envelope>

  15. UDDI • UDDI is a central registry for Business and Web Services • UDDI is a place to store the information about your business, your services, and other technical information • White Page -- Business description and related information • Yellow Page -- Index of services • Green Page -- Technical documents about the services.

  16. Outline • What is Web Services • How to Create Web Services in PB10 • How to Register Web Services in EAServer 5.x • How to Find Web Services in PB10 • How to Write PB Web Services Client in PB10 • How to Write JSP Web Services Client in PB10 • Demo • Q&A

  17. How to Create Web Services in PB10 • Write PB NVO • Set NVO as Web Services component • Deploy PB NVO to EAServer 5.x • Manage Web Services Component in Sybase Management Console

  18. Write NVO • Create an EAServer component • Set NVO as Web Services component • Set NVO as Web Services Component in EAServer Component Wizard

  19. Write NVO (cont.) • Set NVO as Web Services component • Set NVO as Web Services Component in EAServer Component Generator • Deploy the NVO to EAServer 5.x

  20. EAServer Management WebConsole • http://ServerHost:8080/WebConsole/

  21. Outline • What is Web Services • How to Create Web Services in PB10 • How to Register Web Services in EAServer 5.x • How to Find Web Services in PB10 • How to Write PB Web Services Client in PB10 • How to Write JSP Web Services Client in PB10 • Demo • Q&A

  22. How to Register Web Services in EAS 5.x • Publish Web Services Component to UDDI server

  23. Outline • What is Web Services • How to Create Web Services in PB10 • How to Register Web Services in EAServer 5.x • How to Find Web Services in PB10 • How to Write PB Web Services Client in PB10 • How to Write JSP Web Services Client in PB10 • Demo • Q&A

  24. How to Find Web Services UDDI Search in PB and JSP Web Services Proxy Wizard

  25. How to Find Web Services (cont) Search results – Businesses/Services

  26. Outline • What is Web Services • How to Create Web Services in PB10 • How to Register Web Services in EAServer 5.x • How to Find Web Services in PB10 • How to Write PB Web Services Client in PB10 • How to Write JSP Web Services Client in PB10 • Demo • Q&A

  27. Consume Web Services in PB Target • Generate Web Services Proxy using Web Services Proxy Wizard • Add pbsoapclient100.pbd to PB Target • pbsoapclient100.pbd defines 2 new objects (SoapConnection and SoapException) to handle soap message • Write PowerScript Code

  28. Consume Web Services in PB Target (cont) • pbsoapclient100.pbd has 2 objects • SoapConnection 1. instantiated the proxy object and populated SOAP options 2. Set Soap options such as log file, authorization, proxy etc. • SoapException 1. SoapException inherited from PowerBuilder RuntimeError object 2. Errors that occur in the execution of a method of Web service are converted to SoapException objects and thrown to the calling script

  29. Consume Web Services in PB Target (cont) SoapConnection cnn // Define SoapConnection demo_ieuroport proxy_obj // Define proxy long rVal real amount cnn = create SoapConnection //Instantiated connection // Create proxy object rVal = cnn.CreateInstance(proxy_obj, " demo_ieuroport") try amount = proxy_obj.toeuro(100, “DEM”) // Invoke service // use the amount …. catch ( SoapException e ) messagebox (“Error”, “Cannot invoke WS”)// error handling end try destroy cnn

  30. Consume Web Services in PB Target (cont) • Turn on Log if Something Is Wrong • cnn = Create SoapConnectioncnn.setOptions("SoapLog='d:\webservice.log’”) • How to Pass HTTP Authentication • cnn = Create SoapConnectioncnn.setOptions("SoapLog=’’ ,Userid='xxx', Password='yyy'”) • How to Pass a Proxy Server Which Requires Username and Password • cnn = Create SoapConnectioncnn.setProxyServerOptions(“Address=‘proxy.sybase.com’, Userid='xxx', Password='yyy'”)

  31. Outline • What is Web Services • How to Create Web Services in PB10 • How to Register Web Services in EAServer 5.x • How to Find Web Services in PB10 • How to Write PB Web Services Client in PB10 • How to Write JSP Web Services Client in PB10 • Demo • Q&A

  32. How to Write JSP Web Services Client in PB10 • Generate Custom Tag using JSP Web Services Proxy Wizard • Collects information such as location of WSDL file, service, and port (s). • Provides for user-specified overrides for custom bean name, Java class name, Java package name, TLD name, Jar name, output variables and selection of operations within a service. • Provides as output a TLD file, Java source to process custom tag and compiled Java class files of source that can be deployed to a JSP container or used as standalone Java classes. • Write JSP page • Choose custom tag that represents web service to drag and drop on JSP from system tree. • Add Taglib directives. • Specify input and output arguments. All arguments must be represented as objects as they are stored in the pageContext of the JSP container. • Invoke custom tag. • Handle errors. • Deploy to JSP Server

  33. How to Write JSP Web Services Client in PB10 • JSP page <%-- Add custom tag to this page --%> <%@ taglib uri="WEB-INF/tlds/pkg_customer_n_...tld" prefix="cust" %> <%-- Define variable to pass into custom tag --%> <%! Short custid = new Short((short)107); org.omg.CORBA.StringHolder address = new org.omg.CORBA.StringHolder(); ... %> <%-- Run custom tag --%> <cust:of_getcustomer address="<%= address %>" cust_fname="<%= cust_fname %>" ... /> <%-- Print return results --%> <%= address.value %></TD> <%= pkg_customer_n_customerService_of_getcustomer_returnValue %>

  34. How to Write JSP Web Services Client in PB10 • Deploy JSP to any JSP Server

  35. Demo • Deploy PB NVO to EAServer 5.x and make it Web Service • Consume Web Services in PB Target • Consume Web Service in JSP Target

  36. Q & A ?

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