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PowerBuilder 11: The Web Service Source DataWindow

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Presentation on theme: "PowerBuilder 11: The Web Service Source DataWindow"— Presentation transcript:

1 PowerBuilder 11: The Web Service Source DataWindow
John Strano Technology Evangelist Sybase, Inc.

2 PowerBuilder 11 Overview Web Service DataWindow
(presented Nov. 20, 2007) Jim O’Neil Systems Consultant .NET Assemblies (presented Nov. 13, 2007) Jim O’Neil Systems Consultant .NET Windows Forms And Interoperability Dec. 4, 2007 Jim O’Neil Systems Consultant Web Service DataWindow Feb. 5, 2008 John Strano Technology Evangelist PowerBuilder 11 .NET Deployment Web Casts .NET Web Forms Dec. 11, 2007 David Fish Engineering Evangelist .NET Web Services Jan. 29, 2008 David Fish Engineering Evangelist .NET Smart Client Jan. 15, 2008 John Strano Technology Evangelist

3 Agenda PowerBuilder Roadmap
Web Service Source DataWindow Overview and Demo

4 PowerBuilder Roadmap Version 11 released in June 2007
11.1 Maintenance Release in November 2007 Delivers on third-phase of PowerBuilder’s .NET initiative

5 2008 PowerBuilder 11.2 2008 PowerBuilder 11.5 2009 PowerBuilder 12
AJAX support for Web Forms Applications EAServer .NET Client Support Enhancement requests 2008 PowerBuilder 11.5 Core .NET enhancements DataWindow enhancements for Win32 and .NET Updated database support Enhancement requests 2009 PowerBuilder 12 .NET in IDE WPF support at design- and run-time Fully managed code at deployment PowerScript Language Enhancements Language Independence Application Connectivity Multiple Platform Support Power And Performance

6 The Web Services DataWindow
.NET Targets are not required! The Web Service DataWindow is for Win32 deployments as well. You don’t need to know Web Service implementation details The DataWindow and PowerBuilder Make it easy to use Web Services in a productive way The DataWindow now supports consuming Web Services as a data source Only using the .NET Web Services support. Does not utilize EasySOAP

7 The Web Services DataWindow
What the Web Service DataWindow is intended for Access to database data across a network without the need for DB client software on the client Reduces the client footprint Reduces client maintenance Eliminates the need for a persistent database connection Allows for the utilization of unstructured data from non-relational sources Web Services can federate data from disparate sources and disparate types of sources…and can be presented by the DataWindow

8 PowerBuilder .NET Smart Client Support
Occasionally connected PowerBuilder with MobiLink Always up-to-date applications PowerBuilder’s “Intelligent Updater” Maximize performance using client resources PowerBuilder applications deployed as Windows Form (Rich Client) Communicate utilizing Web Services PowerBuilder’s Web Service DataWindow Utilize network resources PowerBuilder’s “Intelligent Update”

9 The Web Services DataWindow
Supported Web Service “results” Simple data types System.Int32, System.String, System.DateTime, System.Decimal Single row, single column An array of simple types Multiple rows with a single column A structure made up of simple types Single row with multiple columns An array of structures made of simple types The familiar rows and columns of a DataWindow.

10 The Web Services DataWindow
The Web Service DataWindow is not intended for access to all Web Services Some services return proprietary data types .NET-implemented services can return a serialized ADO DataSet Some services return data structures too complex for the DataWindow e.g: Amazon returns multiple levels of nested structures Cannot be readily represented as rows and columns These may be supported in the future

11 The Web Services DataWindow
Let’s create a PowerBuilder Web Service We need structure definitions to match the database results For example, the employee table with a few columns selected.

12 The Web Services DataWindow
(cont’d) Let’s create a PowerBuilder NVO Define a method to retrieve the data

13 The Web Services DataWindow
Let’s create a Web Service DataWindow

14 The Web Services DataWindow
What have we just created? A DataWindow object, stored in the PBL as is normal With some additional Web Service properties WSDL .NET Assembly designation Namespace Classname Parameter specifications *** Web Service input parameters are automatically defined as retrieval arguments …cont’d…

15 The Web Services DataWindow
What have we just created? A .NET assembly, custom generated for this Web Service. The .NET assembly does the heavy lifting, communicating with the .NET Web Service support. We use reflection to figure out the methods and types contained in the assembly

16 The Web Services DataWindow Runtime
The DataWindow Engine PowerBuilder Web Service Support The Generated Assembly The .NET Framework

17 The Web Services DataWindow
Deployed files In addition to PBDWE110.DLL (PBDWM110.DLL for .NET deployments) Sybase.PowerBuilder.WebService.Runtime Sybase.PowerBuilder.WebService.RuntimeRemoteLoader These do the communicating between the unmanaged code and the managed assembly created when the DataWindow was built The generated .NET Assembly .NET 2.0 Framework …Cont’d…

18 The Web Services DataWindow
Deployed files …Cont’d… The required PowerBuilder runtime DLLs for Web Service client applications. See “Deploying Applications and Components” in Application Techniques. Examine the documentation for the “Runtime Packager”

19 Run time Web Service Retrieval
Retrieve() works just like it does now You can specify retrieval arguments as parameters as you always have <DWC>.Retrieve ( param1, param2, …)

20 Run time Web Service Update
Of course it’s still just a single line of code. <DWC>.Update ()

21 Transaction Management
What about updates? It’s not like a database! Arguably, there is no single transaction specification (WS-Transaction) for Web Services Microsoft/BEA/IBM Alliance…and Everyone Else Specification-contentious Vendors If there are multiple standards…is there a standard? How would you perform a Rollback for a Web Service from the client? Remediation? NOT the purview of the Web Service DataWindow, but bears thought from the service implementer Remember, Web services are: STATELESS!

22 The Web Services DataWindow
Defining Web Service updates

23 The Web Services DataWindow
Overrides The WSConnection object allows Web Service overrides (optional) Endpoint User ID Password Proxy server Host name Port Authentication mode Timeout Windows integrated authentication

24 Using the WSConnection Object
Some Web services support or require User ID Password Other session-related properties like firewall settings Example: Using an instance of the WSConnection object utilizing a Web Service using the SetWSObject method… int ii_return wsconnection ws_1 ws_1 = create wsconnection ws_1.username = "johndoe" ws_1.password = "mypassword" ws_1.endpoint = "myendpoint" ws_1.authenticationmode = "basic" ws_1.usewindowsintegratedauthentication = true ii_return = dw_1.setwsobject (ws_1)

25 WSError Event Occurs when an error is returned for a DataWindow using a Web Service data source Can occur during any of the following operations Connect Retrieve Delete Insert Update Disconnect

26 WSError Event Argument Description Operation (string)
Type of operation (Retrieve, Update, Insert, Delete, Connect, or Disconnect) Rownum (long) Row number or 0 if not applicable, such as when an error occurs during connection to the Web service Buffername Name of the buffer being accessed while the error occurred (Primary, Filter, or Delete) Wsinfo The WSDL file, the URL that defines the Web service, or the assembly that is used access the Web service Method Name of the Web service method invoked Errormessage Exception message returned from the method

27 Further Resources PowerBuilder Demonstration Recordings…
Recorded Webcasts from this series…

28 Getting Your Hands on PowerBuilder 11
Do you have an Update Subscription Plan (USP)? Access the Sybase Product Download Center (SPDC) at https://sybase.subscribenet.com Download PowerBuilder 11 and companion products Generate license keys Need new or additional licenses? Contact your Sybase sales office (US/Canada: SYBASE) Visit e-shop at

29 The ISUG North American PowerBuilder 11 Tour Continues!
Feb 26th: San Jose, CA – Embassy Suites, Santa Clara Feb 27th: Los Angeles, CA – Embassy Suites North, LAX Feb 28th: San Diego, CA – Windmill Banquet & Catering, Carlsbad

30 Q&A

31 FAQs Q: Can I use a Web Service that is not implemented using PowerBuilder/PowerScript? A: Yes. As long as the public interface of the Web Service uses data types suited to this version of the Web Service DataWindow.

32 FAQs Q: Can I use a PowerBuilder NVO deployed to an application server other than EAServer or IIS as the data source of a Web Service DataWindow? A: Yes. You may use the PowerBuilder Application Server Plug-In to deploy your NVOs to WebLogic, WebSphere or JBoss, then expose them as Web Services.

33 FAQs Q: Can I use Web Service data source DataWindows for DDDWs and for Composite DataWindows? A: Yes, but you must explicitly call a GetChild() and a Retrieve() for them before the Retrieve() call for the parent DataWindow/DataStore…much as you would for a DDDW with retrieval arguments.

34 FAQs Q: Can I change the Web Service data source for an existing DataWindow? A: Normally, no. You may try editing the DataWindow source …if not… You need to recreate the DataWindow from scratch This mirrors the Stored Procedure source DataWindow in this regard

35 Thank you.


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