Vaadin briefly

  • 100% Java based
  • Built on GWT architecture, but only server side
  • With GWT widgets you can extend and add-on
  • Theme support
  • You can develop applications with GUI development, run event-driven programming like Swing and SWT
  • Can work in many servlet containers, including Google App Engine
  • It can be integrated into any Java portal and has a widget structure
  • You can focus more quickly on productivity, productivity, and business

Web framework.

 

With j-guar providing an applet-based user interface, it is an open ERP solution for any kind of integration. You can easily develop j-guar integrated HTML-based applications using j-guar infrastructure.

Here briefly

  • The main account plan records in j-guar can be listed and new records can be added
  • Vaadin components on the front
  • The backplane uses the j-guar infrastructure libraries

Step by step a sample Vaadin project.

1.  Preparing the Development Environment

First of all we need to create the Eclipse IDE and Vaadin Project related plugins;

We can download plugins for Eclipse IDE and Vaudin from the link below.

https://vaadin.com/docs/-/part/framework/installing/installing-eclipse.html#installing.eclipse

2.  Create Example Project

There are two ways to create the project.

  1. You can import the Vaudine application we share.
  2. Or you can create a new project and copy the relevant java files.

We will create a new Vaudin Project in this case. You can follow the process steps below for this.

Note: The creation of the project name as jGUA makes it easier to configure.

https://vaadin.com/docs/-/part/framework/getting-started/getting-started-first-project.html

3.  Add j-guar libraries

In our example, a controller structure is used to add an accounting plan. For this reason, the corresponding controller libraries need to be copied under the \ logo \ WebContent \ WEB-INF \ lib folder. From the Application Status / Copy Controller Jars, select UNGL (General Ledger) from http: // host: port / logo / Status and you can perform the copy operation with the copy button.

The j-guar libraries need to be added to the classpath of the Vaadin project. We will add all j-guar libraries as user libraries.

For this

  • The Java build path screen opens on the right click properties window on the Vaadin project.
  • The library of j-guar is added to the classpath as user library as follows.
 Ekranlar...

  • We add the name of the build path entry that we gave the name as Deployment Assembly.
 Ekranlar...

Artık j-guar’ daki kütüphaneleri vaadin projesinden kullanabiliriz.

 4.   Copying the Java Files and Updating the Path

  • Finally, we copy the java files for example promise into my project.

Sample Project Structure

The project structure is as follows.

 

The server is initialized via the application path where j-guar is installed in the "Servlet" class of the project. This is where the database connection information is read.

 

Note: Do not forget to update the getApplicationPath method according to the installed j-guar path.

5.   Run the Project

Right click on the Servlet.java class and run the project with Run As-> Run on Server, or http: // host: port / j-guar / promise via browser after starting the server.

6.   Deployment of Vaadin project to j-guar

The process steps that should be done by deploying the Vaadin project to j-guar and working together are as follows;

  • Vaadin project should be exported as "jar" and copied to the ... / WEB-INF / lib folder in the j-guar installation.

  • If the promise libraries used in the pledge project (server, shared, push, themes, client-compiled, jsoup) and extra libraries (such as promise plugin libraries) should also be copied to the j-guar ... / WEB-INF / lib folder.
  • The corresponding VaadinServlet definition for the path that the Vaadin project will work on j-guar should be added to web.xml.
        ..\logo\WebContent\WEB-INF\web.xml

Vaadin URL için Servlet
<!--Vaadin Start-->
<servlet>
       <display-name>VaadinServlet2</display-name>
        <servlet-name>VaadinServlet2</servlet-name>
        <servlet-class>com.example.jguar.Servlet</servlet-class>
        <init-param>
            <description>Vaadin UI to display</description>
            <param-name>UI</param-name>
            <param-value>com.example.jguar.JguarUI</param-value>
        </init-param>
</servlet>
<servlet-mapping>
        <servlet-name>VaadinServlet2</servlet-name>
        <url-pattern>/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
        <servlet-name>VaadinServlet2</servlet-name>
        <url-pattern>/vaadin/*</url-pattern>
</servlet-mapping>
<!--Vaadin End-->

The VAADIN folder containing the theme and widget sets components used in the Vaudine project should be copied under j-guar ../WebContent.

After these actions http://host:port/logo/vaadin Link and promise project through the j-guar path.

Source Code

Örnek Uygulamalar

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