Sequences Lesson 1 MD18

The name of the sequence diagram is in editing mode. Start typing Define Title and press Enter. Note that the owner nodes (interaction and collaboration) have been renamed as well.

The sequence diagram Define Title is now included in the package Use Cases.

The actor Consumer in package Data / Overview / Use Cases is part of the process and can be directly used in the sequence diagram.

Select the actor Consumer.

Drag the actor from the containment tree onto the diagram pane.

The first Lifeline is created.

The actor Consumer uses the Web service, which is accessible via the SOAP interface. You can use the port type GetTitlePortType in the sequence diagram as well.

Select the port type class GetTitlePortType in package Data / Services / GetTitleService / Ports.

Drag GetTitlePortType onto the diagram pane and drop it next to the lifeline Consumer.

The interaction is designed by using messages that are exchanged between the lifelines. In the next step, draw the call message, which is sent by the actor Consumer.

Select the Call Message icon from the diagram toolbar.

Move the mouse cursor over the consumer's lifeline and click when the blue frame appears.

Move the mouse cursor over to the lifeline of the port type. When the blue frame appears, click again to draw the message.

You have now created a call message from actor Consumer to port type GetTitlePortType. Now, you need to specify, which operation is called on the port type.

Select the call message and open the Message specification dialog via the context menu.

Define the Operation by selecting the operation getTitle from the drop down list.

Next, click Arguments in the left panel of the dialog.

The argument list shows two arguments, which correspond to the input and output parameters of the port type operation. Both are having default values (-), which will not be changed as no specific values need to be entered for this message. Since you only pass inputTitle as parameter to the SOAP operation, you can delete the argument outputTitle.

Click the second argument (parameter outputTitle) and delete it by clicking the Delete button on the lower right corner of the dialog.

Close the dialog window.

The call message has been defined. The actor is calling the port type operation getTitle and is passing the input parameter inputTitle.

In the next step, you will draw the reply message from port type GetTitlePortType back to the service consumer Consumer.

Select the Reply Message icon from the diagram toolbar.

Draw the reply message from the lifeline of the port type to the lifeline of the actor.

Double-click the return message to open the Message specification dialog.

Enter return in the Name field.

Now, you will assign the output parameter outputTitle.

Click Arguments in the left panel of the dialog. Then, click the Create button.

A list showing all possible argument types appears.

Select Element Value .

The Select Element dialog window opens showing the content of the containment tree.

Enter outputTitle in the search field. Select the operation parameter outputTitle from Data / Services / GetTitleService / Ports / GetTitlePortType / getTitle and click Ok.

The parameter is displayed in the argument list now.

Close the Message specification dialog.