Spring AOP & MVC notes by Mr.Sekhar sir

Spring AOP and MVC notes(material) by Mr.SomaSekhar Reddy sir from NareshiTechnologies, Ameerpeta, Hyderabad.AOP(Aspect Oriented Programming) and MVC(Model View Controller) are come on top of the Spring Core module. Mr.Sekhar sir has explained all the topics in AOP including with annotations and diagrams.Also he has given in detail notes on MVC and XML. Go through the other modules Spring ORM notes and IOC and DAO notes by Sekhar sir.These will give you more knowledge on Spring framework.

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1.1. MVC - Architecture - 1

 Web Application Devolopment Models.

Model - 1 Architecture :

Model 1 architecture based web application development is outdated approach of developing web applications. Now a days most of the companies are using MVC architecture to develop the web application. It has become industries defector standard to develop the web applications.

Model 1 architecture based web application multiple web resources will be there but all these web resources will be developed either by using Servlet technology or by using JSP technology.

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Struts Flow and Architecture

Before going to know about Struts Flow and Architecture we get to know What is Struts Frame work? As per simple definition "Struts is an open Source framework, given by Apache Software Foundation, which is used develop MVC2 based web applications in java". Struts contains Validations, I18N(Internationalization and Exception handling features. Because of these three Struts became very popular.

Web.xml entries will be read by WebContainer of WebServer or Application Server software. Struts configuration file entry is will be read by ActionServlet.

WebContainer creates Actionservlet object where as FormBean class object, ActionClass object will be created by ActionServlet.

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Disadvantages of MVC Architecture

In the development of MVC architecture based web application not only we need to use multiple technologies , but we also need to use(follow) set of rules in the development of web application. Also for parallel development of application more programmers with knowledge on multiple technologies is required.

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Advantages of MVC Architecture

Currently most of the developers are working on MVC (Model,View,Controller) design pattern to develop web applications. Before going to the key points of Advantages of MVC architecture, just recollect the Structure of MVC .Model,View and Controller are the three components to separate logic to reuse entire the application. Developer role will become specific on particular layer and development of application will become easy.

 

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1.3. MVC Architecture Layers

In MVC architecture based web-application development multiple layers will be involved like

• Model layer
• View layer
• Controller layer

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1.2. Limitations Of Model 1 Architecture

Since multiple logic's are mixed up in every web resources of web application there are no clean separation of logic's/rolls.

• Modification done in one logic disturbs other logic of the web application parallel development is not possible due to this productivity is very poor.
• Maintenance and enhancement of the project is always complex.
• Programmer will be overburdens because he has to implement middle-ware services along with main logic's.

Advantages : Knowledge servlets of JSP is enough to develop the web-application.

• Model 1 architecture is not a industry standard to develop the web-application.
• To overcome the problem of Model 2 architecture use MVC architecture Model 3 architecture to develop the web-application.
  

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