7 How to Implement a Web Service

Create a Form and Report

Next, you need to create a page that contains a form and report to use with your Web Service Reference.

To create a form and report after creating a Web Service Reference:

1. On the Create Web Service Reference success page, select Create Form and Report on Web Service.

2. For Choose Service and Operation:

   1. Web Service Reference - Select MovieInformation.

   2. Operation - Select GetTheatersAndMovies.

   3. Click Next.

3. For Page and Region Attributes:

   1. Form Region Title - Change to Theater Information.

   2. Accept the other defaults and click Next.

4. For Input Items:

   1. For P2_ZIPCODE and P2_RADIUS, accept the default, Yes, in the Create column.

   2. For P2_ZIPCODE, change the Item Label default to ZIP Code.

   3. Click Next.

5. For Web Service Results:

   1. Temporary Result Set Name (Collection) - Accept the default.

   2. Result Tree to Report On - Select Theater (tns:Theater).

   3. Click Next.

6. For Result Parameters, select all the parameters and click Finish.

7. Click Run Page.

8. If prompted to log in, enter the user name and password for your workspace and click Login.

   A form and report resembling Figure 7-2 appear. Notice that the Theater Information Form at the top of the page contains a data entry field and a submit button, but the Results Report does not contain any data.

   Figure 7-2 Theater Information Form and Report without Data

   
   Description of "Figure 7-2 Theater Information Form and Report without Data"
   
   

9. To test the form, enter 43221 in the ZIP Code field and 5 in the Radius field. Then click Submit.

   The report at the bottom of the page should resemble Figure 7-3. The report lists the names and addresses of movie theaters matching the entered ZIP code and radius.

   Figure 7-3 Theater Information Report Showing Resulting Data

   
   Description of "Figure 7-3 Theater Information Report Showing Resulting Data"
   
   

Create a Web Reference Manually

To create a Web reference manually, you will copy code from the WSDL for a service called MovieInformation.

To create a manual Web reference:

1. On the Application home page, click Shared Components.

2. Under Logic, click Web Service References.

3. Click Create.

4. For Search UDDI, select No and click Next.

5. From the Tasks list on the right, click the Create Web Reference Manually link.

   The Create/Edit Web Service page appears.

6. In the Name field, enter Movie Info.

7. Locate the endpoint of the MovieInformation service:

   1. Open the WSDL by going to:

      http://www.ignyte.com/webservices/ignyte.whatsshowing.webservice/moviefunctions.asmx?wsdl
      
      

   2. In the WSDL, find the location attribute of the soap:address element, which is a child of the port element. You can search for the following term within the code: soap:address location.

      At the time of this release, it was this attribute:

      http://www.ignyte.com/webservices/ignyte.whatsshowing.webservice/moviefunctions.asmx
      
      

8. In the URL field on the Create/Edit Web Service page, enter the endpoint of the MovieInformation service you located (such as http://www.ignyte.com/webservices/ignyte.whatsshowing.webservice/moviefunctions.asmx).

9. Locate the SOAP action for the GetTheatersAndMovies operation:

   1. If necessary, open the WSDL again. See Step 7a.

   2. In the WSDL, find the soapAction attribute of the soap:operation element, which is a child of the operation element that has a name attribute of GetTheatersAndMovies. You can search for the following term within the code: soap:operation soapAction.

      At the time of this release, it was this attribute:

      http://www.ignyte.com/whatsshowing/GetTheatersAndMovies
      
      

10. In the Action field on the Create/Edit Web Service page, enter the SOAP action you located (such as http://www.ignyte.com/whatsshowing/GetTheatersAndMovies)

11. Locate the SOAP request envelope:

    1. Go to a Web services tool, such as Mindreef:

       http://www.mindreef.net/tide/scopeit/start.do?referer=xmethods&url=http://www.ignyte.com/webservices/ignyte.whatsshowing.webservice/moviefunctions.asmx?wsdl
       
       

    2. Click the Invoke tab and then click GetTheatersAndMovies.

    3. In the Message Envelope section in Mindreef:

       - Enter #ZIP# in the xs:string tns:zipCode field.

       - Enter #RADIUS# in the xs:int tns:radius field.

       Later, you will create two items on a page: ZIP Code and Radius. When this service is called, the values entered for the two items will be sent with the request.

    4. Click Preview/Edit on the Invoke page of Mindreef. This shows the SOAP request envelope with the parameters defined by the values you entered.

       At the time of this release, the following appeared after the HTTP Authentication region on the page:

       <?xml version="1.0" encoding="UTF-8"?>
       <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
       xmlns:tns="http://www.ignyte.com/whatsshowing"
       xmlns:xs="http://www.w3.org/2001/XMLSchema">
          <soap:Body>
             <tns:GetTheatersAndMovies>
                <tns:zipCode>#ZIP#</tns:zipCode>
                <tns:radius>#RADIUS#</tns:radius>
             </tns:GetTheatersAndMovies>
          </soap:Body>
       </soap:Envelope>
       
       

12. In the SOAP Envelope field on the Create/Edit Web Reference page, enter the xml code that appeared after the HTTP Authentication region on the page (such as the code shown in Step 11d).

13. In the Store Response in Collection field, enter MOVIE_RESULTS. This is where the response from the Web service will be stored.

    The Create/Edit Web Service page should resemble Figure 7-4.

    Figure 7-4 Create/Edit Web Service Page

    
    Description of "Figure 7-4 Create/Edit Web Service Page"
    
    

14. Click Create.

    The Web Service References page appears, showing Movie Info in the list.

Test the Web Service

To test the Web service:

1. On the Web Service References page, click the Test icon next to the Movie Info Web reference.

   The Web Services Testing page appears.

2. In the SOAP Envelope field, replace #ZIP# with 43221 and #RADIUS# with 5.

3. Click Test.

4. Review the Result field and note the following about the response:

   • The base node in the return envelope is called:

     GetTheatersAndMoviesResponse
     
     

   • The namespace for the message is:

     http://www.ignyte.com/whatsshowing
     
     

   • The XPath to the interesting parts of the response under the result element is:

     /GetTheatersAndMoviesResponse/GetTheatersAndMoviesResult/Theater/Movies/Movie
     
     

   • The interesting elements in the results are called:

     Name
     Rating
     RunningTime
     ShowTimes
     
     

Create a Page to Call the Manual Web Service

Next, you want to create a page to call the manual Web Service.

To create a page to call the manual Web service:

1. Click the Application breadcrumb link.

2. On the Application home page, click Create Page.

3. For Page, select Blank Page and click Next.

4. Accept the default for the Page Number and click Next.

5. In Name, enter Find Movies and click Next.

6. For Tabs, accept the default, No, and click Next.

7. Click Finish.

8. On the Success page, click Edit Page.

9. On the Page Definition, locate the Regions section.

10. Click the Create icon.

11. For Region, select HTML and click Next.

12. Select HTML as the HTML region container and click Next.

13. In the Title field, enter Movie Information and click Next.

14. Click Create Region.

Create a Submit Button

Next, you want to add a Submit button to the region to initiate a search from the page.

To create a Submit button:

1. On the Page Definition, click the Create icon in the Buttons section.

2. For Button Region, accept the default, Movie Information, and click Next.

3. For Button Position, accept the default, Create a button in a region position, and click Next.

4. For Button Attributes, enter SUBMIT in the Button Name and click Next.

5. For Button Template, accept the default, Button, and click Next.

6. For Display Properties, select Region Template Position #CREATE# from the Position list and click Next.

7. In the Branch to Page field, select Movie Information from the list. The page number appears in the field.

8. Click Create Button.

Create Items for ZIP Code and Radius

Next, you want to create two items where users can enter a search term.

To create the ZIP Code item:

1. On the Page Definition, click the Create icon in the Items section.

2. For Item Type, select Text and click Next.

3. For Text Control Display Type, accept the default, Text Field, and click Next.

4. For Display Position and Name, specify the following:

   1. Item Name - Enter ZIPCODE.

   2. Region - Accept the default, Movie Information.

   3. Click Next.

5. In the Label field, replace the existing text with ZIP Code and click Next.

6. Click Create Item.

To create the Radius item:

1. On the Page Definition, click the Create icon in the Items section.

2. For Item Type, select Text and click Next.

3. For Text Control Display Type, accept the default, Text Field, and click Next.

4. For Display Position and Name, specify the following:

   1. Item Name - Enter RADIUS.

   2. Region - Accept the default, Movie Information.

   3. Click Next.

5. In the Label field, enter Radius and click Next.

6. Click Create Item.

Create a Process to Call the Manually Created Web Reference

Next, you want to create a process that calls the manually created Web reference.

To create a process to call the manually created Web reference:

1. On the Page Definition, click the Create icon in the Processes section.

2. For Process Type, select Web Services and click Next.

3. In the Name field, enter Call Movie Info and click Next.

4. From the Web Service Reference list, select Movie Info and click Next.

5. In the Success Message area, enter Called Movie Info.

6. In the Failure Message area, enter Error calling Movie Info and click Next.

7. From the When Button Pressed list, select SUBMIT and click Create Process.

Create a Report on the Web Service Result

Next, you want to add a report that displays the results of the called Web service.

To create a report on the Web service result:

1. On the Page Definition, click the Create icon in the Regions section.

2. Select Report and click Next.

3. For Region, select Report on collection containing Web service result and click Next.

4. In the Title field, enter Search Results and click Next.

5. For Web Reference Type, select Manually Created and click Next.

6. For Web Reference Information, specify the following:

   1. Web Service Reference - Select Movie Info from the list.

   2. SOAP Style - Select Document.

   3. Message Format - Select Literal.

      Note that these two attributes can be determined by manually inspecting the WSDL document for the service.

   4. Result Node Path - Enter:

      /GetTheatersAndMoviesResponse/GetTheatersAndMoviesResult/Theater/Movies/Movie
      
      

   5. Message Namespace - Enter:

      http://www.ignyte.com/whatsshowing
      
      

      Note that you reviewed both the Result Node Path and Message Namespace when testing the service.

   6. Click Next.

7. In the first four Parameter Names, enter Name, Rating, RunningTime, and ShowTimes, and click Create SQL Report.

8. To test the page:

   1. Click Run Page. If prompted to log in, enter your workspace user name and password. The Movie Information form appears, as shown in Figure 7-5.

      Figure 7-5 Movie Information Form with No Data

      
      Description of "Figure 7-5 Movie Information Form with No Data"
      
      

   2. In the ZIP Code and Radius fields, enter information and click Submit.

      The results appear in the Search Results area.