Web Services Bruce Armstrong TeamSybase firstname.lastname@example.orgSlide 2
Agenda • Introduction to Web Services • Creating .NET Web Services • Consuming Web Services • Web Service DataWindow • Q & ASlide 3
Introduction to Web ServicesSlide 4
Introduction to Web Services Facilitate c ommunication between frameworks Different stages Different programming dialects Through firewalls effectively Self engaging API Self unmistakable informationSlide 5
What are Web Services? A gathering of operations that can be depicted, distributed, found, and gotten to over a system utilizing institutionalized XML informing Proposed to World Wide Web Consortium (W3C) in Mar 2001 http://www.w3c.org Web Services use XML making them both stage and dialect autonomous XML gives us an instrument for making cross-stage or potentially cross-dialect correspondencesSlide 6
Web Service Components The essential parts that make up Web Services are: WSDL – Web Services Description Language Used to portray Web administrations SOAP – Simple Object Access Protocol Used for sending and getting messages from Web administrationsSlide 7
Describing Web Services Why does a Web benefit should be depicted? Web administrations could be utilized by anybody, anyplace, utilizing any dialect on any stage A portrayal permits a designer to know how to cooperate with a Web benefit PowerBuilder gives devices to peruse and coordinate WSDL Web administrations are depicted utilizing Web Services Description Language (WSDL) WSDL is composed in XML Usually an engineer of a Web Service does not need to physically compose WSDL PowerBuilder 11 makes the ASMX, DISCO and WSDLSlide 8
CREATING .NET Web ServicesSlide 9
PowerBuilder/.Net Web Services PowerBuilder gives you the decision of yielding PowerScript code as an Assembly Web Service The main distinction PowerBuilder Web Service creation now versus back in Version 9.0 of PowerBuilder is EAServer is no longer a necessity These Web Services are sent to your Microsoft IIS Web ServerSlide 10
.Net Web Service TargetSlide 11
Web Service Virtual Directory The wizard is for all intents and purposes the same concerning .NET gatherings, and so forth. You should indicate a virtual index name for your Web Service however in light of the fact that it will live on IISSlide 12
.Net Web Service Wizard Output PBL, Application Object, Project, NVOSlide 13
NVOs – Code as you ordinarily wouldSlide 14
Web Service Project Wizard decisions may dependably be changed in the Project:Slide 15
Web Servic e Deployment Options Directly to IIS or make a MSI introduce FileSlide 16
Web Service Specifics You should choose which techniques you need to uncover You can see WSDL and test your Web ServiceSlide 17
Viewing WSDL Must convey your .NET Web Service target first Project View WSDL catch OR In a program http ://hostname/virtdirname/service.asmx?WSDLSlide 18
WSDL ExampleSlide 19
More WSDL – Message, Operation, Service, PortSlide 20
IIS Directory – What is here?Slide 21
Web Service Virtual Root DirectorySlide 22
Global.asax record A source record where engineers can include application level rationale into their Web applications Application occasions, for example, Application_Start , Application_End , Session_Start , Session_End live here Located at the foundation of a specific Web application\'s virtual catalog tree Automatically parsed and gathered into a dynamic .NET Framework class The first run through any asset or URL inside the application namespace is initiated or asked forSlide 23
Global.asax record Configured to consequently dismiss any immediate URL ask for so that outer clients can\'t download or see the code inside <%@ Application Codebehind =" Global.asax.cs " Inherits=" PBWebApp.Global " %>Slide 24
DISCO Files DISCO is a Microsoft innovation for distributing and finding Web Services DISCO documents make it conceivable to find the Web Services uncovered on a given server DISCO records make it conceivable to find the abilities of each Web Service (by means of documentation) and how to collaborate with it DISCO records live in the Web Application\'s virtual root <?xml version="1.0" encoding="utf-8"?> <discovery xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd ="http://www.w3.org/2001/XMLSchema" xmlns ="http://schemas.xmlsoap.org/disco/"> < contractRef ref="http://localhost/webservice/n_webservice.asmx?wsdl" docRef ="http://localhost/webservice/n_webservice.asmx" xmlns ="http://schemas.xmlsoap.org/disco/scl/"/> </discovery>Slide 25
ASPX records ASP.NET offers help for Web Services with the.asmx document (a wrapper to your Web Service) Similar to a . aspx records we discussed with PowerBuilder/WebForm applications From a program, enter the accompanying: http://hostname/virtdirname/service.asmx OR utilize the accompanying that was produced on organization of the Web Service: C:\ Inetpub\wwwroot\virtdirname\TestWebService.htm OR in the arrangement extend tap the Run Web Service catchSlide 26
List of Web Service Operations The ASMX document records your Web Service strategies Clicking a connection takes you to a test "bridle" for that techniqueSlide 27
Testing the Web ServiceSlide 28
Test ResultsSlide 29
Why Did We Do This? Interoperability You now have a Web Service prepared to be gotten to from: Java C # VB (VB.NET) PowerBuilder …Slide 30
Sample: Calling PB Web Service from C#Slide 31
CONSUMING Web ServicesSlide 32
Accessing Web Services Once you have the points of interest and have fabricated your web benefit shopper application, how would you call that web administration\'s strategies? Make a Simple Object Access Protocol (SOAP) message PowerBuilder gives two choices equipped for perusing and composing SOAP messages "Legacy" EasySoap PBNI augmentation "New" .NET EngineSlide 33
SOAP A XML-based interchanges convention " Everything is XML" Industry standard for cross-stage appropriated informing Defined by World Wide Web Consortium (W3C)Slide 34
Web Service Consumption Consuming a Web Service from a PowerBuilder customer is fundamentally the same as utilizing a PowerBuilder/EAServer segment An intermediary is required, however Web Services require a Web Service intermediary, not an EAServer intermediary An association is required, but rather Web Services require a Soap Connection The Web Service is like a NVO/Component in that it is a holder of techniques which could be called by means of SOAP messages Continued …Slide 35
Web Service Consumption Invoking Web benefits through SOAP requires: Serialization and deserialization of information sorts The building and parsing of XML-based SOAP messages A PowerBuilder Web Service customer intermediary plays out these assignments for you killing the need broad learning of : The SOAP detail and mapping The XML Schema determination The WSDL particular and diagramSlide 36
.Net Web Service Engine Flow Prerequisite: .NET 2.0 Framework SDK MUST be introduced on advancement machine. .NET 2.0 Framework (Runtime) MUST be introduced on both advancement and sending machine .Slide 37
Web Service Proxy WizardSlide 38
Choose the Web Service EngineSlide 39
Specify WSDLSlide 40
Select a Service From WSDLSlide 41
Define Prefix for Proxy (Optional)Slide 42
Specify Project Name and LibrarySlide 43
Specify PBL for created intermediary It is a standard practice to store your intermediaries in a different PBL in your library listSlide 44
Proxy Project Upon fruition of the WSPW, the new venture is unmistakable in the System Tree, and the venture will be open in the painter Next, convey the ventureSlide 45
Use Proxy Servers? In the event that your organization utilizes a Proxy Server to connect amongst you and the Firewall, visit the Tools System Options exchange Input the name of your Proxy Server, port, your client id and secret word to that intermediary server This is for configuration time Internet associations justSlide 46
The Web Service Proxy System Tree (extended), after the send of the intermediary extend The function(s) accessible from the Web Service will be noticeable under the intermediary Be certain you comprehend that the intermediary venture is separate from the genuine intermediary questionSlide 47
Use of Aliases in Proxy PowerBuilder is not case delicate XML (SOAP) and .NET are case touchy To get around that distinction, every strategy in the intermediary utilizes a nom de plume The string that takes after "assumed name for" contains the case-delicate name and the mark of the comparing XML or SOAP techniqueSlide 48
Exported Web Service Proxy Note the "false name for" provisions in the capacity or subroutine statementsSlide 49
.Net Web Service Engine – Files Created from ProxySlide 50
Web Service Runtime Engines EasySoap Engine – pbsoapclient110.pbd/pbx This motor is in reverse good with the PB9/PB10 Web Service motor It can chip away at machines that don\'t have the .NET structure .NET Engine – pbwsclient110.pbd/pbx This is new .NET SOAP motor Both of the above characterize two classes: SoapConnection SoapExceptionSlide 51
What Was that PBX Reference? An expansion to PowerBuilder usefulness made utilizing the PowerBuilder Native Interface (PBNI) Before 10.5, a PBNI augmentation (*.pbx or *.dll) engineer needed to: Use the pbx2pbd utility to make a PBD document from an expansion Be certain to put the augmentation record (PBX) in the application\'s pursuit way and add the PBD record to the objective\'s library list Now there are less strides: Import the *.pbx specifically into your *. pbl\'s utilizing the System Tree Must in any case convey the augmentation in the application\'s waySlide 52
Importin g PowerBuilder Extensions Prior to PB 10.5, to pick up a SoapConnection , you included pbsoap nnn .pbd to your library list Pbsoap nnn .pbd was a PBNI expansion for EasySoap Now you c
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