Struts 2 – Architecture
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This document provides an overview of the Struts 2 framework architecture and its request lifecycle. It explains that Struts 2 follows a pull-MVC pattern with five main components: actions, interceptors, the value stack, results, and view technologies. The request lifecycle involves a user request being routed through the filter dispatcher to an action, then any configured interceptors before the action is performed. Finally a result prepares the view to return to the user. It also provides an example of a basic "Hello World" Struts 2 application to demonstrate these concepts.
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Test Report is needed to reflect testing results in a formal way, which gives an opportunity to estimate testing results quickly. It is a document that records data obtained from an evaluation experiment in an organized manner, describes the environmental or operating conditions, and shows the comparison of test results with test objectives
What is Text Analysis?
Text analysis is known as text analytics. It refers to the representation, processing, and modeling of textual data to derive beneficial insights. An important element of text analysis is text mining, the process of finding relationships and interesting patterns in large text collections.
Data Science Using Scikit-Learn
Several Python libraries offer solid execution of a range of machine learning algorithms. One of the best called is Scikit-Learn, a package that supports accurate versions of a large number of standard algorithms. A clean, uniform features and Scikit-Learn, and streamlined API, as well as by beneficial and complete online documentation.
Struts 2 – Database Access
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Spring – Java-based Container Configuration
The central artifacts in Spring’s new Java-configuration support are @Configuration-annotated classes and @Bean-annotated methods.
The @Bean annotation is used to indicate that a method instantiates, configures, and initializes a new object to be managed by the Spring IoC container. For those familiar with Spring’s XML configuration, the @Bean annotation plays the same role as the element. You can use @Bean-annotated methods with any Spring @Component. However, they are most often used with @Configuration beans.
What is Hibernate Framework?
Hibernate is a java based ORM tool that provides a framework for mapping application domain objects to the relational database tables and vice versa.
Hibernate is probably the most popular JPA implementation and one of the most popular Java frameworks in general. Hibernate acts as an additional layer on top of JDBC and enables you to implement a database-independent persistence layer.
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Struts 2 – Architecture
- 1. Welcome to Ducat India Language | Industrial Training | Digital Marketing | Web Technology | Testing+ | Database | Networking | Mobile Application | ERP | Graphic | Big Data | Cloud Computing Apply Now Training & Certification 70-70-90-50-90 www.ducatindia.com
- 2. Struts 2 – Architecture From a high level, Struts2 is a pull-MVC (or MVC2) framework. The Model-ViewController pattern in Struts2 is implemented with the following five core components − Actions Interceptors Value Stack / OGNL Results / Result types View technologies Struts 2 is slightly different from a traditional MVC framework, where the action takes the role of the model rather than the controller, although there is some overlap.
- 3. Request Life Cycle Based on the above diagram, you can understand the work flow through user’s request life cycle in Struts 2 as follows − • User sends a request to the server for requesting for some resource (i.e. pages). • The Filter Dispatcher looks at the request and then determines the appropriate Action. • Configured interceptor functionalities applies such as validation, file upload etc. • Selected action is performed based on the requested operation. • Again, configured interceptors are applied to do any post-processing if required. • Finally, the result is prepared by the view and returns the result to the user. Sturts2 Example As we have already learnt from the Struts 2 architecture, when you click on a hyperlink or submit an HTML form in a Struts 2 web-application, the input is collected by the Controller which is sent to a Java class called Actions. After the Action is executed, a result selects a resource to render the response. The resource is generally a JSP, but it can also be a PDF file, an Excel spreadsheet, or a Java applet window. Assuming that you already have built your development environment. Now, let us proceed for building our first Hello World Struts2 project. The aim of this project is to build a web application that collects the user’s name and displays “Hello World” followed by the user name. Read More: https://tutorials.ducatindia.com/java/struts-2-architecture/