It provides full access to the DOM structure and allows you to have maximum control over the browser. A JavaScript compiler – Vaadin Compiler – that is based on Google Web Toolkit (GWT) is used to compile the widgets and applications in order to make them executable in the browser. Client-centric development model Optimized for effective monitoringĬlient-centric model enables the development of widgets and applications with the help of Java. The client-side engine receives the response and uses it to show the changes on the webpage loaded into the browser. When components of the user interface on the server side are changed by the logic of the user interface, the servlet renders those changes to be displayed in the web browser and generates a response. Events are associated with components of the user interface and delivered to event listeners defined in the application. The servlet receives HTTP requests from the client and interprets them as events of the specific user session.
It is a pure Java in a JAR file that can be added to any traditional web application, this JAR file is executed in any servlet or portlet container - from Tomcat to Oracle WebLogic. Server part of the application is executed as a traditional Vaadin servlet of the Java application server.
Vaadin engine renders the user interface of the server-side application in the browser and takes care of all the aspects of the client-server communications. In this case, the server-side part of Vaadin will take care of the user interface in the browser, and the AJAX interaction between the browser and the server. Server-side approach allows you to develop user interface for your web application in almost the same way as the interface of traditional Java applications with direct access to data and services on the server. AJAX-based Vaadin Client-Side Engine is used to generate user interface in the browser.
#Vaadin ui browser tab code
Server-centric development model is the basic model for Vaadin, it allows you to create finished applications without a single line of code on the client side. Server-centric development model Optimized for high performance
Two basic development models can be used: on the server side and on the client (browser) side.įigure 2 contains basic architectural components of a web application created with the help of Vaadin. Vaadin includes the following components: server API client API a set of user interface components on both sides a subsystem user interface themes a data model allowing to bind server components directly to the data. Developers utilize only Java, but the Java code is executed on the server, the client uses “pure” JavaScript. Vaadin (by the way, this word means “deer” in Finnish) supports all common browsers for traditional PCs, as well as mobile devices and tablets. Java does not provide any useful tools to develop modern Web interfaces (Do you still remember what Java applets look like?) - neither in terms of design, nor in terms of the client-server interaction. But what if the entire client-server application was developed using Java? Why not to make the client part “native” to the browser in compliance with the most modern usability concepts? In a client-server architecture, Java applications are most often located on the server side, and web interfaces are created by separate groups of front-end developers using JavaScript.
0 kommentar(er)
