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JSF

JSF is defined as a Java Based framework for building web based user interfaces. JSF stands for JavaServer Faces which acts as a standard Web application framework for Java EE. Few benefits of JSF are listed below:

  • It allows the implementation of custom components.
  • With JSF, users can easily transfer the data between UI components.
  • It helps in managing the User Interface state across the multiple server requests.

Main objective of JSF is to build the web applications faster. JSF helps in the developer’s work by hiding the complexities. Two major components of JSF are as follows:

  • XML tags are used to create the JSF pages. In JSF, each tag elements is similar to the UI components. Developer can do their work without dealing with the details of JavaScript and HTML markup.
  • JSF Files containing dynamic data which are modeled into POJO are known as JSF backing Beans. JSF server is used to manage the lifecycle of backing beans.

JSF creates the UI components in a View Page with the help of JSP custom Tag Library. JSF consist a Set of APIs to manage and represent the state of components. The most important advantage of using JSF is that users can use its basic UI components and additional components too. It minimizes the efforts of developers in creating and maintaining applications.

JSF application is quite similar to the java based web application. JSF mainly consists three parts which are given as:

  • Java based Data Management
  • For using components in any browser, it provides a set of UI components that can be converted into standard HTML tags.
  • JSF consist a component model that allow third party developers to provide subsidiary components.

Lifecycle of JSF application includes six main phases which are listed below:

  • Restore view phase: in this phase, JSF save the view in FacesContext instances and creates the event handlers, view and validators to the user interface components. After that, all the necessary information to process a request is contained by FacesContext.
  • Apply request view phase: after creating the component tree, each component extract the new value from requested parameters by using decode method. This value is stored by the component and if the conversion fails, an error message is generated to the FacesContext instance.
  • Process validation phase: in this phase, JSF examines the all registered validators with component attribute rules and compared these rules with the local value that is stored for the component. If value is invalid, JSF generates the error message to the FacesContext.
  • Update model value phase: in this phase, JSF set the properties of server side object to the local value and update the bean properties which are similar to the input component’s value attribute.
  • Invoke application phase: in this phase, application level events is handled by JSF such as linking to another page, form submission, etc.
  • Render response phase: in this phase, if the application is using JSP pages, then it asks application server to render the page. For starting request, component tree adds the all components that are represented on the page.

Another major aspect of JSF is that is based on pattern of Model View Controller Design and it also follows few business standards. JSF with Model View Controller Design help users to use the new MVC framework easily.

JSF runs on a Java servlet container. There are two types of integration included in JSF:

  • Spring integration: it provides a specific class to integrate the spring and JSF together, this class is named as DelegatingVariableResolver.
  • JDBC integration: it used JDBC for integrated the database in JSF.

JSF Component Model enables third party to develop the reusable UI component libraries. For running the application, JSF uses a jar file. Some of its jar files are as follows:

  • Commons-collection.jar
  • Commons-baenutils.jar
  • Commons-digester.jar
  • Jsf-api.jar
  • Odc-jsf.jar
  • Common-logging.jar
  • Jsf-impl.jar

JSFToolbox 4.5 is the latest advanced toolbox of JSF. It allows the Java developers to create JavaServer faces with Web authoring tools. This tool involves many features such as EL support, dynamic code hints, etc. JSF2.3 is the upcoming version of JSF. Some of the advanced topics that involved in JSF are listed below:

  • Apache MyFaces with AJAX
  • Custom component development
  • Ajax in JavaServer Faces application
  • Integration with JSP applications
  • Domain Controller
  • Web Framework
  • Web Server And service deployment
  • JSP

Moreover, JSF handles the resource bundle by using Internationalization technique in which GUI component tables and status messages are not embedded in the program.

Expressions in JSP can be simplified by a way which is provided by the Expression language. This language is used for accessing the implicit Java and Objects classes. These objects can be accessed by JavaBeans and Servlets.

For building the JavaServer Faces, JSF used a page declaration language which is known as Facelets. It creates the web pages by using XHTML. Facelets supports its own tag libraries and expression language.

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JavaServer Faces (JSF) is a MVC web system that streamlines the development of user interfaces (UI) for serverbased applications by utilizing reusable UI segments as a part of a page.JSF gives office to associate UI gadgets with information sources and to serverside occasion handlers. The JSF particular characterizes an arrangement of standard UI segments and gives an Application Programming Interface (API) for creating components.JSF empowers the reuse and augmentation of the current standard UI components.JSF innovation is a structure for creating, building server side User Interface Components and utilizing them as a part of a web application.JSF innovation is in light of the Model View Controller (MVC) construction modeling for isolating rationale from presentation 

JSF application is like whatever other Java innovation based web application; it keeps running in a Java servlet compartment, and contains 

JavaBeans segments as models containing applicationparticular usefulness and information 

A custom label library for speaking to occasion handlers and validators 

A custom label library for rendering UI segments 

UI segments spoke to as stateful articles on the server 

Serverside partner classes 

Validators, occasion handlers, and route handlers 

 

Application setup asset record for designing application assets.

JSF stands for Java Server Faces. The Life cycle of the Java Server Pages is similar to the Java Server Faces. Representation of the Java Server Faces is done by the UI component which is in the hierarchal nature. Hierarchical nature representation of the Java Server Faces is known as the view. When a client request for a page then the life cycle of the Java Server Face starts. During the lifecycle, the view must be created by the JSF execution looking into the condition of the previous page submission. When the client request for a page then it is the responsibility of the JSF to check the task like conversion of data to the server type data and input validation of data for view component. When a client requests for a JSF page by clicking on the link then restoration phase of the view starts. In the Restoration phase many events like binding of the component and view of the generation of the page take place. A rich web application is designed by the JSF and AJAX. The UI component of the MyFaces and JSF is created by using the HTML.AJAX is mainly used in creating the rich user interface. Basically the Java Server Faces Technology is a frontend framework which creates user interface component.

JavaServer Faces (JSF) is a MVC web system that rearranges the development of user interfaces (UI) for server-based applications by utilizing reusable UI segments as a part of a page.JSF gives facility  to unite UI gadgets with information sources and to server-side occasion handlers. The JSF determination characterizes a set of standard UI parts and gives an Application Programming Interface (API) for creating components.JSF enable reuse and augmentation of the current standard UI segments. 

JSF gives 

  • Core library 
  • A set of base UI parts - standard HTML info components 
  • Extension of the base UI parts to make extra UI segment libraries or to amplify existing segments. 
  • Multiple rendering abilities that empower JSF UI segments to render themselves differently relying upon the types of user 
  • A custom label library for determining  event handlers and validators 
  • A custom label library for rendering UI parts 
  • UI parts refer to as stateful items on the server 
  • Server-side  classes 
  • Validators, event handlers, and route handlers 

There are controllers which can be utilized to perform client actions.UI can be made by site page creators .JSF gives a few instruments to rendering an individual part. 

JSF application lifecycle comprise of six stages which are as per the following 

  • Restore perspective stage 
  • Apply values for request ; process occasions 

Process acceptances stage; process occasions 

  • Update model qualities stage; process occasions 
  • Invoke application stage; process occasion

 

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