Modelio Sequence Diagram

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The Ultimate Guide to Activity Diagrams in UML - Includes a general overview, common benefits of using one, basic components, standard symbols, examples, and more. Learn how to plan and create an activity diagram with this guide. A sequence diagram shows, as parallel vertical lines (lifelines), different processes or objects that live simultaneously, and, as horizontal arrows, the messages exchanged between them, in the order in which they occur. This allows the specification of simple runtime scenarios in a graphical manner. Use smart instance creation, by dragging a classifier into an instance context (such as an internal structure or a collaboration, or an interaction/sequence diagram) Create custom setters and getters for class attributes and association ends: Generate overridden/realized operations: Drag a class from browser to sequence diagram to create a lifeline. Sequence diagram template of a bank balance inquiry system.-You can edit this template and create your own diagram. Creately diagrams can be exported and added to Word, PPT (powerpoint), Excel, Visio or any other document. Use PDF export for high quality prints and SVG export for large sharp images or embed your diagrams anywhere with the.

  1. Modelio Sequence Diagram
  2. Modelio Sequence Diagram Loop
  3. Modelio Sequence Diagram Pdf
  4. Modelio Sequence Diagram If

MVC (Model-View-Controller) is an architectural design pattern that encourages improved application organization through a separation of concerns. It divides an interactive application into three components: Model / View and Controller. It enforces the isolation of business data (Models) from user interfaces (Views), with a third component (Controllers) traditionally managing logic, user-input and coordinating both the models and views. The goal of MVC is to help structure the separate the concerns of an application into three parts:

  • Model is responsible for managing the data of the application. It receives user input from the controller.
  • View means the presentation of the model in a particular format.
  • Controller responds to the user input and performs interactions on the data model objects. The controller receives the input, optionally validates it and then passes the input to the model.

Modelio Sequence Diagram

The Purpose of MVC Framework

As mentioned above, MVC software framework helps us to separate the different aspects of the application (input logic, business logic, and GUI), while providing a loose coupling between these elements. Thus, the information (most reusable) logic belongs in the model, the GUI belongs in the view. Input logic belongs in the controller. This separation helps you manage complexity when you build an application because it enables you to focus on one aspect of the implementation at a time. MVC Framework is a good idea for a number of reasons, including:

  • Simultaneous development – Because MVC decouples the various components of an application, developers are able to work in parallel on different components without affecting or blocking one another.
  • Reusability – The same (or similar) view for one application can be refactored for another application with different data because the view is simply handling how the data is being displayed to the user.
  • improved scalability – if your application begins experiencing performance issues because database access is slow, you can upgrade the hardware running the database without other components being affected
  • Low coupling — the very nature of the MVC framework is such that there is low coupling among models, views or controllers.
  • better extendibility – as the components have a low dependency on each other, making changes to one (to fix bugs or change functionality) does not affect another

Modelio Sequence Diagram Loop

Develop Use Case Scenario Using MVC Sequence Diagrams

You can use stereotypes for the lifeline in the MVC sequence diagram to make visually clear what type of objects you are using in the MVC. An MVC Sequence diagram has interface objects, controller objects and entity objects:

  • Entities are objects representing system data: Customer, Product, Transaction, Cart, etc.
  • Boundaries are objects that interface with system actors: UserInterface, DataBaseGateway, ServerProxy, etc.
  • Controls are objects that mediate between boundaries and entities. A controller object often correspond to use cases scenario and often represented by a sequence diagram.
Modelio Sequence Diagram

Modelio Sequence Diagram Pdf

And here is the simplistic and hypothetical sequence diagram for MVC. What you see in this diagram, a web-user initiated a query and an event is generated that is handled by the controller and gets information that is needed from the model, validates the information and passes back the result set to the view. Kiese laymon heavy excerpt.

Example MVC Sequence Diagram

Suppose an application that let you search for persons. The UI must have a text field where the user can enter a search string and it might have a button to start the search. Finally it must have an area where the search results are displayed. In our case, it is implemented with a list component.

The “Search for Persons” use case Scenario is:

  • The user enters a search string in the text field
  • The user clicks the search button.
  • The search result is displayed in the result list.

The sequence diagram above shows how the user’s button click moves through the application until the result gets finally displayed in the list component.

UML2 has considerably improved sequence diagrams. It is now possible to:

  • reference other UML sequence diagrams,
  • represent loops and choices,
  • define formal and current call parameters (gates), and so on

Modelio Sequence Diagram If

Modelio sequence diagrams support all these powerful features, and provide a set of smart interactions that make modeling even easier.


Just drag and drop a class into a sequence diagram to create a lifeline, or drag and drop an interaction into a sequence diagram to create an interaction reference with all its gates.