Developing SIP and IP Multimedia Subsystem (IMS) Applications

400 Developing SIP and IP Multimedia Subsystem (IMS) Applications

Figure 12-49 Select a reference partner

21.The selected Partner and Interface are displayed in the Details tab.

22.Choose getLocation as the operation.

23.Make sure that Use Data Type Variables check box is checked.

24.To assign a variable to the URI input parameter, click the icon at the end

of the line. The Select Variable for URI dialog box opens (see Figure 12-50 on

page 401).

25.Select uriAddress.

26.Click OK.

Chapter 12. Implementing the IMS sample service 401

Figure 12-50 Select variable

27.Similarly assign the following variables to the input and output parameters of

the getLocation operation:

Table 12-7 Assign variables to the getLocation parameters

The completed GetLocation Details tab should look like Figure 12-51 on

page 402.

Parameter Variable

requestedAccuracy nRequestedAccuracy

acceptableAccuracy nAcceptableAccuracy

getLocationReturn LocationResponse

402 Developing SIP and IP Multimedia Subsystem (IMS) Applications

Figure 12-51 GetLocation details

28.Select the Determine Closest Address sequence.

29.Right-click and select Add → Snippet.

30.Rename the new snippet Assign GetLocation Output.

31.With the snippet selected, open the Properties view.

32.Select the Details tab.

33.Create a visual snippet as shown in Figure 12-52.

Figure 12-52 Assign GetLocation Output snippet

Chapter 12. Implementing the IMS sample service 403

To calculate the address that is nearest to the originator we need to call the

getTerminalDistance for each address in the list:

34.Select the Determine Closest Address sequence.

35.Right-click and select Add → While Loop.

36.Set the name of the new While loop to Loop Through Addresslist.

37.With the snippet selected, open the Properties view.

38.Select the Details tab to specify the loop conditions.

39.In the Details tab select Create a New Condition. This opens the visual

snippet editor.

40.The loop shall iterate through all entries in the addresslist. The condition is

implemented in the snippet as shown in Figure 12-53.

Figure 12-53 Loop through Addresslist condition

41.Select the Loop Through Addresslist While loop.

42.Right-click and select Add → Snippet.

43.Rename the new snippet Assign GetDistance Input.

44.With the snippet selected, open the Properties view.

45.Select the Details tab.

46.Create a visual snippet as shown in Figure 12-54.

Figure 12-54 Assign GetDistance Input snippet

We are ready to invoke the getTerminalDistance operation of the Location Web

service.

404 Developing SIP and IP Multimedia Subsystem (IMS) Applications

47.Select the Loop Through Addresslist While loop.

48.Right-click and select Add → Invoke.

49.Rename the new invoke node GetDistance.

50.With the invoke node selected, open the Properties view.

51.Select the tab Details.

52.Click Browse to select a Reference Partner. The partner selection dialog box

opens.

53.Select LocationServicePartner.

54.Click OK.

55.The selected Partner and Interface are displayed in the Details tab.

56.Choose getTerminalDistance as the operation.

57.Make sure that Use Data Type Variables check box is checked.

58.Similar to the getLocation invoke node (see Step 24 on page 400) assign the

following variables to the input and output parameters of the

getTerminalDistance operation:

Table 12-8 Assign variables to the getTerminalDistance parameters

When you are finished, the GetDistance Details tab should look similar to

Figure 12-55 on page 405.

Parameter Variable

uri uriAddress

latitude fOrigLatitude

longitude fOrigLongitude

getTerminalDistanceReturn nCurDistance