Questions tagged [sequence-diagram]
The sequence-diagram tag has no usage guidance.
62
questions
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1answer
66 views
when and how to use class responsibility collaboration cards vs sequence diagrams?
I've recently come across CRC cards and sequence diagrams at my university.
Martin fowler has said that sequence diagrams are interchangeable with CRC cards when you're in the design phase of your ...
0
votes
1answer
36 views
How to return an new Object as Value ?[Sequence Diagram]
within the sequence diagram it is possible to return a value, with return of a method edge, however this is usually done with a simple numeric or string value. Is it possible to return a whole object? ...
1
vote
1answer
255 views
What can be an Actor in a subsystem sequence diagram?
I am doing a lot of sequence diagrams. We decided to start at a subsystem level of abstraction because we do not have all the details yet. In my diagrams I was using this definition of Actor:
In UML, ...
1
vote
1answer
58 views
Is my Sequence diagram correct? I need some comments
It's a SEQ diagram designed for a smartwatch app to receive zone level of feeling from an adult with autism on their smartwatch and provide a recommendation based on their input.
The scenario is like ...
0
votes
1answer
235 views
How do I represent parallel (multiple) inputs in a UML Sequence diagrams?
I am new to UML sequence diagrams. I saw a few YouTube videos and a few tutorials such as this one.
I have a system with multiple inputs, that can interact with the system asynchronously. For example,...
0
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1answer
340 views
CRUD use case and relative sequence diagram
I'm building my project with Visual Paradigm and I have some use cases that implements the CRUD pattern.
As specified in the book Use Cases: Patterns and Blueprints, Övergaard and Palmkvist suggest ...
0
votes
1answer
115 views
User registration flow UML diagrams
This my first UML diagram for user registration flow.
After double checking the diagram I feel that I have a crowded diagram compared to what I can found in Google search.
My questions:
Are my alt ...
1
vote
2answers
81 views
Should the View pass data inserted from user to Controller or should the Controller get data from View's fields? (MVC Pattern)
My View has a textfield and a button. According to MVC pattern on button click should be called a function of the controller. This function should do some operation on the View's textfield content. It ...
3
votes
2answers
5k views
How to write UI in sequence diagram?
So i want to make a sequence diagram for login .. the first step is user access my website then the system redirect to login Form, then he insert username and password than the system validate it , if ...
1
vote
1answer
497 views
Sequence diagram: explicitly show websocket creation?
I am trying to draw up a sequence diagram to show how my web client will interact with my backend over a websocket connection.
I am using a websocket middleware to manage the stream connections.
...
0
votes
3answers
444 views
Is this right way to create sequence diagram?
im trying to create a sequence diagram for login , but i dont know if its true or not , maybe the community can help me check , because i see many way to create sequence diagram and its not the same ...
7
votes
1answer
775 views
Why is a <<create>> message asynchronous in UML sequence diagrams?
As far I as I could tell, the proper way to show an object creation in a sequence diagram is with an asynchronous arrow, e.g.,
However, in Java (and other OO languages I have used), as far as I know, ...
0
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2answers
1k views
Object and actors in sequence diagram [duplicate]
question
Can an actor "talk" directly with an object of the system in a sequence?
example
For an homework I need to model a "tracking service" for some shipping company.
The functional requisites ...
0
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1answer
1k views
Handle alternative frame in sequence diagram
Question
When an alt frame is used in a sequence diagram, and one of the two possibility end the sequence, how is "legal" to continue?
example
I need to represent a sequence in wich there ...
-1
votes
3answers
194 views
Coherence between sequence diagram and class diagram
Question 1
All participants in a sequence diagram must match a class in class diagram?
Question 2
All class that represents some object that is created by the system needs a class that creates it?
...
1
vote
2answers
130 views
What's the use case of the combined fragment “strict”?
As far as I understood, synchronous messages will be handled one after another.
Then we have the interaction operator for combined fragments called "strict" which states, that the operands inside the ...
2
votes
2answers
632 views
UML sequence diagram for a peridoc operation
I have a scheduled operation in my spring boot application using spring boot scheduler.
this operation executes every period of time(30 minutes) and adds data in the database if conditions are met.
I ...
1
vote
1answer
172 views
Is the sequence diagram for the pull model for observer pattern the same as push model?
I've been looking at examples of sequence diagrams for observer pattern but most implement push model where the subject updates the observers. In a pull model how would it be different because ...
1
vote
1answer
833 views
C# variables in Sequence diagram
I am playing with sequence diagram. And main question is how to draw properly on sequence diagram interaction with variable. How to draw
1) When MakePayment aggregates person
insurance....
0
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2answers
440 views
Is it possible to represent an if statement in a system sequence diagram?
I'd like to highlight that this questions is about a System Sequence Diagram (SSD) and not a simple Sequence Diagram and of course any help would be appreciated!
I'm reading Graig Larman's book ...
-5
votes
1answer
93 views
How this diagram can be improved [closed]
I'm looking for failures in this "token based login" design, besides the UML "syntax" errors. Theoretically speaking, it will do the trick when implemented on an small project.
If true, sorry about ...
1
vote
1answer
945 views
Trying to understand Sequence Diagram
I am trying to understand two sequence diagrams that I have found in the SE course at university of Washington. Can you confirm if my understanding is correct ?
Diagram 1:
According to my ...
3
votes
0answers
493 views
Displaying entity framework calls in Sequence Diagram
I have a controller action which gets all the Plants by location from the database puts it inside a view model and passes it to the view.
public ActionResult index()
{
List<Plant> plants = ...
0
votes
1answer
807 views
Microservice dependency diagram
What is the best way to capture dependency between microservices.
I want to create a diagram which show the interfaces and the microservices using the interfaces.
The aim is to easily do a impact ...
1
vote
3answers
687 views
How to display a C# using() statement in sequence diagram
Is there a rule/guideline about how to display a C# using() statement in UML sequence diagrams?
I'm right now in the last months of my apprenticeship. And to
prove, that I'm able to develop software ...
1
vote
1answer
674 views
Representing handlers on UML diagrams
This question is a follow-up to Representing multiple actions for sequence of objects on activity diagram, but isn't strictly related. The question boils down to:
How to present in UML patterns that ...
4
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1answer
9k views
Shall the Database in a sequence diagram be represented as actor or boundary?
I'm designing a system made of a web application and database. I use the <<Entity>> - <<Control>> - <<Boundary>> stereotypes in my UML diagram.
In the following ...
2
votes
1answer
4k views
What is a good diagrammatic way to represent async event communication between two systems?
What is a good diagrammatic way to represent asynchronous event communication between two systems (the pub sub model)? I am not looking for tools but more of a representation. Is it a sequence diagram,...
2
votes
2answers
4k views
Sequence diagram for Abstract and Derived class
I've a bunch of classes where one is Abstract class. I draw few derived class from that Abstract base class. For example,
class IBase{
public:
*register(): bool*
*update(): bool*
};
class Derived:...
2
votes
4answers
1k views
Is actor a own class
I have this sequence diagram and want to transform it into a class diagram.
But I don't know if the actor (Customer) is in this case a own class or not. Normally the actor isn't a own class, but in ...
2
votes
2answers
2k views
Long chained method calls contained within an if statement shown on a sequence diagram
Just wondering if there is a good way to do this? Currently i'm performing the method calls as if they were happening prior to the conditional block, then comparing what would be the result in "[...
5
votes
3answers
2k views
Software architecture | App with API back-end
I have been searching the net for an answer, but I was not able to find a similair question nor answer. So here I am.
I am developing an app where a user can take a picture of a car and they will get ...
2
votes
1answer
2k views
How do I represent a recursive process down a tree in a sequence diagramm?
I'm working on a sequence diagram for a layered system that has a tree hierarchy. Now I have a process that works itself recursively down the tree. Meaning calling the same function on a child object.
...
3
votes
2answers
1k views
A function as a parameter in UML
I was wondering what is the best way to represent a function that is passed as a parameter in UML. Because I want to create a sequence diagram of my current networking code in my Swift project and ...
3
votes
1answer
1k views
UML Sequence Diagram
I am trying to draw a sequence diagram for "post a job" use case.
The description is as follow:
Basic flow:
This use case begins when the employer selects the “Post a new Job” option.
System ...
10
votes
3answers
19k views
UML sequence diagram - how to represent async response
If A sends an async message to B like for example, to load async images to UI from the web. Where should the response message go?
Should it be slant as well or direct? And where would the activation ...
13
votes
1answer
10k views
Sequence Diagram: Are actors objects?
The most likely answer is no, but I've come with this doubt. Can an actor act as a class?
I know actors trigger events and can have prompts, but if there's a class modeling an actor (such as an user ...
2
votes
2answers
3k views
How to show multiple exit conditions in a system sequence diagram loop frame
How are multiple exit conditions in a system sequence diagram loop frame indicated? And how would the alternative event flow based on how the system exited the loop be shown?
For example a login loop ...
2
votes
2answers
789 views
Is it okay to simplify a Sequence Diagram (grouping lifelines)?
Is it okay to group several Components into a single lifeline for simplicity?
For example, let's say I have a UML Component Diagram, and it's a layered architecture. There are 26 components, one on ...
2
votes
2answers
583 views
Sequence diagram - unknown receiver of a message
Our lecture provides us students a quiz to revise the material learnt of the last study session.
The answer to the following questions was stated as "Yes":
"The receiver of a message does not have ...
4
votes
1answer
6k views
Does a message in a UML sequence diagram have parameters or arguments? [duplicate]
I recently took an exam for the introductory course on Computer Science. One question was about sequence diagrams (very simple example, boiled down to its essentials):
The Bank object sends a message ...
2
votes
1answer
2k views
Is there a way to show an if statement in a UML Sequence Diagram?
I went on an interview last year and was shown a sequence diagram and was asked to describe the the sequence. There were 2 things in the diagram I had never seen before. I asked what one of them was ...
4
votes
2answers
5k views
How to show retry in sequence diagram
I am drawing sequence diagram for large integration project where one system will initiate the REST call to another system and there is a proxy in middle which will pass through the request like
A->...
3
votes
3answers
2k views
What is the connection between messages in sequence diagrams and method calls?
Since sequence diagrams depict messages between objects in a system, the messages have to be representing method calls. My question is if I have two objects in the diagram lifeline
A --- doSomething(...
1
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0answers
6k views
Var assignment in sequence diagram
I am trying to represent the function below (PHP function/Symfony2) as a sequence diagram using UML 2.0 and Visual Paradigm:
private function getVeevaHcpSync($request, $action, $case)
{
...
4
votes
1answer
6k views
Should a list or array of objects be represented as a lifeline in sequence diagram?
I have the following sequence diagram to add a student to a list of students.
the implementation could be like
List<Student> Students = new List<Student>();
Students.Add(aStudent);
I ...
13
votes
3answers
20k views
UML: Queue processor in a sequence diagram
Which is the appropriate way of representing a queue processor in a UML sequence diagram?
I want to represent in the same diagram two systems that are loosely coupled through a queue. The first ...
2
votes
3answers
2k views
Sequence diagrams and the Implementation
In the design phase we create UML Sequence diagrams (in OOD). My understanding is that after creating an Use Case diagram if we need to show further information in terms of time sequence of events of ...
2
votes
2answers
2k views
How deep is enough to represent an algorithm in UML sequence diagram?
I have three simple classes. LoginController, UsersCatalog and User. UsersCatalog has an array of User. I have to represent a simple process of login.
LoginController has a method login(username, ...
2
votes
2answers
1k views
How to handle long method names in sequence diagram?
I have a C# application that is developed with VS 2010 pro. The ultimate version would have a sequence diagram feature.
Since I will "create" my sequence diagram manually, how do I deal with quite ...
