4+1 Architectural view model

-
A model is a complete, basic, and simplified description of software architecture which is composed of multiple views from a particular perspective or viewpoint.
A view is a representation of an entire system from the perspective of a related set of concerns. It is used to describe the system from the viewpoint of different stakeholders such as end-users, developers, project managers, and testers.

4+1 Architecture view Model
The 4+1 View Model was designed by Philippe Kruchten to describe the architecture of a software–intensive system based on the use of multiple and concurrent views. It is a multiple view model that addresses different features and concerns of the system. It standardizes the software design documents and makes the design easy to understand by all stakeholders.
It is an architecture verification method for studying and documenting software architecture design and covers all the aspects of software architecture for all stakeholders. It provides below four essential views 
  • Logical view or Conceptual view :  It describes the object model of the design.
  • Process view : It describes the activities of the system, captures the concurrency and synchronization aspects of the design.
  • Physical view : It describes the mapping of software onto hardware and reflects its distributed aspect.
  • Development view : It describes the static organization or structure of the software in its development of environment.
This view model can be extended by adding one more view called scenario view or use case view for end-users or customers of software systems. It is coherent with other four views and are utilized to illustrate the architecture serving as “plus one” view, (4+1) view model. 
The following figure describes the software architecture using five concurrent views (4+1) model.


Why is it called 4+1 instead of 5?

The use case view has a special significance as it details the high level requirement of a system while other views details — how those requirements are realized. When all other four views are completed, it’s effectively redundant. However, all other views would not be possible without it. 

Comments

Post a Comment

Popular posts from this blog

Email Sending through O365 using OAuth Protocol

-
  Microsoft Office365 EWS servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application Microsoft / Office 365 OAuth + EWS We can use the OAuth authentication service provided by Azure Active Directory to enable our application to connect with IMAP, POP or SMTP protocols to access Exchange Online in Office 365. To use OAuth with our application we need to register application on Azure Active directory and other steps also we need to do to get the access token back. Below are the steps   To use Microsoft/Office365 OAUTH in your application, you must create an application in  https://portal.azure.com . Sign into the Azure portal using either a work or school account or a personal Microsoft account. If your account gives you access to more than one tenant, select your account in the top right corn
Read more

IISRESET vs App Pool Recycling ?

-
Image
 I think most IIS administrators know IISRESET command, and why they use it. One of possible reasons can be to restart IIS services to initialize web applications, or to apply some changes of applications & IIS settings .There’re just a few conditions those need your IISRESET command. In most situations, you don’t need this. I have a concern if you always run this command for applying any changes, or release system resource – memory – regularly, or frequently. Because it’s much more cost than what you really need to take – there’re side effects Recycling App Pool’ has been introduced from IIS6 in Windows2003. It’s designed to restart only application pools(=worker processes). It can be done in a command prompt(run ‘IISAPP /?’ in a command prompt for details), as well as in the IIS manager What IISRESET does? When you run IISRESET, many things will happen. In order to understand them, I think I need to show you how IIS looks like – about IIS core components. The below shows you role
Read more

Deploy .Net6.0 Web api with docker

-
Image
  What is Docker? Docker is a containerization platform, meaning that it enables you to package your applications into images and run them as “containers” on any platform that can run Docker. It negates the classic: “It works on my computer” argument as Docker images contain everything needed for the app to run. Are Containers the same as Virtual Machines? They are similar, but not the same. In short: Virtual Machines provide OS Level Virtualization Containers provide App Level Virtualization This concept is depicted below: Why Would You Use it? In short you would use Docker, (and hence containers), for the following reasons: Portability.  As containers are self- contained  they can run on any platform that runs Docker, making them easy to stand up and run on a wide variety of platforms. Scalability.  With the use of additional “orchestration” you can spin up multiple container instances to support increased load. Performance.  Containers generally perform better than their VM counterp
Read more