![]() Select Create Message from Resource Catalog.Ĭreate message is created.Release the mouse button on the lifeline user.Press on the resource Resource Catalog and drag it out.Move the mouse pointer over the activation in lifeline registrationController. Therefore, we need to relate them with a create message. We say that registrationController creates the user lifeline. Relate lifeline registrationController and user.You can see that those are operation of classRegistrationController. This pops up a list of name that you can choose for the new sequence message.Move to lifeline registrationController and release the mouse button.Press on the Resource Catalog resource and drag it out.Move the mouse pointer over lifeline registrationUI. Let's model the method invocations between lifelines.The diagram will look like the following. Don't forget to select the appropriate classes for them. Create a Control Lifeline registrationController : RegistrationController and an Entity Lifeline user : User.In the Select Class window, select the RegistrationUI class and then click OK to confirm.Īfter that, the lifeline will look like the following.Right-click on the lifeline and select Select Class > Select Class.Enter registrationUI as the name of lifelife and then press Enter to confirm.Click on the diagram to create a boundary lifeline.Select Boundary Lifeline (B) from the diagram toolbar.This creates an empty UML sequence diagram. Keep the diagram name as provided and click OK to confirm. In the New Diagram window, select Sequence Diagram and click Next.Click on the resource icon at the bottom right corner and select New Diagram. Move the mouse pointer to RegistrationController. Since the controller class is responsible to control the registration process, add a sub-sequence diagram from it. Now, we want to model the interaction between object instances of these classes in runtime.We have three classes - RegistrationUI, RegistrationController and User. To open a project, select Project > Open from the application toolbar. You can also find this file at the bottom of this tutorial. In the user authentication process we describe, the messages show how a user enters information into the browser to gain access to the webpage and how the web browser will then cross-check credential to the designated application. What information is passed from one object to another? The other set of components you must identify are the messages the objects will send. The objects, sometimes called actors, are the principal players that perform tasks and send messages.įor example, in a login sequence, two of the objects would be the potential visitor or user and the login page a visitor uses to interact with the platform they’re attempting to log into. The first necessary set of components are the objects. To accomplish these goals, you must first identify the components of your system that should be diagrammed. Map out a real or hypothetical scenario that has many different components. See how objects and components interact with each other in sequence to complete a process. Model how a complex procedure or system operates. You can accomplish several critical tasks with a sequence diagram.
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