The actor in this use case is the Professor. Brief Description:This use case allows the registrar to maintain student information in the registration system. This includes adding, modifying, and deleting students from the system. The actor for this use case is the Registrar.
A description of the logical view of the architecture. Describes the most important classes, their organization in service packages and subsystems, and the organization of these subsystems into layers. Also describes the most important use-case realizations, for example, the dynamic aspects of the architecture.
Class diagrams may be included to illustrate the relationships between architecturally significant classes, subsystems, packages and layers. The logical view of the course registration system is comprised of the 3 main packages: User Interface, Business Services, and Business Objects.
The User Interface Package contains classes for each of the forms that the actors use to communicate with the System. Boundary classes exist to support login, maintaining of schedules, maintaining of professor info, selecting courses, submitting grades, maintaining student info, closing registration, and viewing report cards. The Business Services Package contains control classes for interfacing with the billing system, controlling student registration, and managing the student evaluation.
The Business Objects Package includes entity classes for the university artifacts i. This application layer has all the boundary classes that represent the application screens that the user sees. This layer depends upon the Process Objects layer; that straddles the separation of the client from mid-tier. The Business Services process layer has all the controller classes that represent the use case managers that drive the application behavior. This layer represents the client-to-mid-tier border.
The Business Services layer depends upon the Process Objects layer; that straddles the separation of the client from mid-tier. A description of the process view of the architecture. Describes the tasks processes and threads involved in the system's execution, their interactions and configurations.
Also describes the allocation of objects and classes to tasks. The Process Model illustrates the course registration classes organized as executable processes. Processes exist to support student registration, professor functions, registration closing, and access to the external Billing System and Course Catalog System. This process manages access to the legacy Course Catalog System. It can be shared by multiple users registering for courses.
This allows for a cache of recently retrieved courses and offerings to improve performance. The separate threads within the CourseCatalog process, CourseCache and OfferingCache are used to asynchronously retrieve items from the legacy system.
The unabbridged catalog of all courses and course offerings offered by the university including those from previous semesters.
This class acts as an adapter see the Gamma pattern. There is one instance of this process for each student that is currently registering for courses. This supports the use case allowing a student to register for courses in the current semester.
Manages the student functionality, including user interface processing and coordination with the business processes. Controls the interface of the Student application. Give include static model, interface model, relationship Brief Ideas For Risk model, and dynamic processmodel. Components Applications 1. Various plans for detailed design phase, which Incremental Model Or include the following Iterative Enhancement 3. Software verification and validation plan Model In Software. Software configuration management plan Engineering What Are The 5.
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Note Dsign Tools that the use of an appropriate architectural style What Is Black Box promotes design reuse, leads to code reuse, and Testing supports interoperability.
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OmniGraffle, LucidChart, Draw. Deployment diagram complements the understanding of the system from the physical appearence perspective. The most of previous diagrams were very technical ones.
Use Case diagram is more business oriented. It depicts how the persons are interacting with your system in a very high level way. Use cases themselves can be treated as business capabilities, which I were describing in this article.
The architect can draw a diagram with any graphical editor and with the same toolset used for other diagrams. Omnigraffle, LucidChart, Draw. PlantUml or LucidChart helps with that. Discuss this article on twitter. If you like the article, make sure to Subscribe for the upcoming articles!
Context The c4 website does a pretty good job explaining their diagrams, but I still would like to provide my own understanding. Example Context diagram This diagram displays the neo-banking digital platform presented by a blue rectangle in the center. How to draw Identify the persons who will use your system Identify the external systems Create a single rectangle depicting your system Add connections between the system, users and external systems Provide meaningful comments on every component Tools There are different tools you can use to create the context diagram.
Let's say we want to draw the aforementioned diagram for a neo-banking digital platform with uml: startuml! Important highlights Context diagram is the first thing you create when working on a system. Failing to do so may cost you missed integrations and mistakes during system design. Context may actually include some lower level details, this is perfectly fine. I was struggling with a context diagram for one banking system.
It would include only a newly created system and a single customer, which didn't bring any value. That way the context diagram started to make sense and allowed to omit those elements from the lower level diagrams. We had a learning system in development. At the time of Alpha release we understood, that analytical system is not receiving the data from the client facing app.
Should we have a context diagram in place, we won't make that mistake. Luckily, it was easy to fix. Containers Containers. Containers everywhere! Example Container diagram How to draw Identify the list of entities: microservices, storages, external services Place them on the diagram Add comments on the purpose of each component and the technology it is implemented with Add connections with arrows Add meaningful labels to each arrow Pick up a color scheme and apply it Create a legend.
Tools Same as for the context diagram: Draw. Important highlights Pay attention that the elements are placed in columns. First column is just an API Gateway, the second - the first group of services, then a second group of services, then some storages. This way you demonstrate the layered architecture, which helps to understand the boundaries and responsibilities. When microservices count grows beyong a single digit, your connection lines will start to intercept.
The academical books say you have to avoid the interceptions for readability. Unfortunately, this is not always possible. Do not get upset: focus on making the diagram readable. You can use different colors or line widths, or different line styles dotted, solid, etc. If you use a custom tool like I am you need to include a Legend block.
It's not obvious what the arrows mean, and what is the color's meaning. Legend explains it. The common question when using cloud is: do you include the managed services, like queues and messaging solutions? I tend to answer no.
This complicates the diagram instead of making it easier to read. If some services are communicating through a message queue, display it via separate type of arrow. I teach my fellow architects to follow the layered approach when they create container or components-and-connections diagrams. Those diagrams tend to include many entities and structuring them with layers increases readability. Summary Container diagram provides insight into which deployable items your backend consist of and how those components talk to each other.
Sequence Diagram Sequence diagrams show different stages of a process The first two diagrams show how the elements of the system relate to each other.
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