Vaadin Framework Java
Architecture of the Vaadin Framework
Before setup the environment, let's understand the architecture of the Vaadin framework. The Vaadin framework provides two modules to develop a website. The first module is for the server-side, and the second one is for the client-side.
The given diagram defines the entire runtime environment of the Vaadin framework.
In order to deal with the Vaadin Framework, we should have knowledge of the following points:
In order to use the Vaadin, we first have to set up the framework, and for that, we use the following steps:
We should have JDK 8 or a newer version in our local development environment because Vaadin uses JVM. We set the environment variables for JAVA to work it properly. In order to check whether the JDK 8 is installed properly or not in Windows operating system, run the java-version in the command prompt. If, as an output, it shows the java version, the JDK is successfully installed in the system.
In the next step, we install the IDE available online. These are the following IDEs that we can use for the Vaadin framework:
We have to make sure that the IDE which we use should have the latest version.
As an application server, we use the Tomcat. We configure the Tomcat server in our system to use Vaadin. If we install the latest version of Netbean, there is no need to install the Apache Tomcat because Netbean automatically installs it in our system. If we use Eclipse or Intellij, we should have to install the Apache Tomcat from its official website, i.e., https://tomcat.apache.org/.
For our application, the internet browser will act as the client. So, we can use any of the modern internet browsers like Chrome, Safari, etc.
In the end, we configure the Eclipse. We type the Vaadin in the search bar of the eclipse marketplace. We install it by click on the install button as shown below.
Create First Application
Let's understand how we can create a web application using the Vaadin framework by simply taking an example.
We use the following steps to create the first Vaadin application using Eclipse IDE:
1) We first go to the File menu and click on the New and then click on the Other just like as:
2) Now, type Vaadin in the search bar. Select Vaadin 8 project and click on the Next
3) After clicking on the Next button, a new window opens with four options, i.e., Single-module Application Project, Multi-module Application Project, Add-on Project, and CRUD Example. Select an option that is best suited for you and go to the next step.
4) After clicking on the Next button, a new window will be open to provide the Group and Artifact ID. We click on the Finish button after fill all the information in the required fields. The finish button finishes the project, and Eclipse creates Vaadin for us.
It takes some time to create an application because it requires the configuration setting.
5) Now, we go to the directory structure of the automated Vaadin project like as:
6) Our first Vaadin application is ready to run. We run the project on any of the application servers. After running the application on the server, we see the output like as:
7) Enter any value in the text box and click on the Show Data button. This click reflects the value of the text box below the button.
Advantages and Disadvantages of Vaadin Framework
These are the following advantages and disadvantages of the Vaadin framework:
The Vaadin framework provides the following advantages for the developers:
Provide multiple options
In comparison to the other conventional web technologies, the Vaadin framework offers many layouts, components, and different listeners that make it much preferable to use.
In order to build or develop web pages, there is no need to use markup languages. The Vaadin Framework is developed or built by using Java, and that framework itself provides all kinds of support by using Google Web Toolkit.
Vaadin framework completely based on Java, i.e., fully object-oriented programming language. Due to object-oriented behavior, the developer can easily develop the website. The developer should have knowledge of the uses of the Vaadin classes.
Simple to learn and integrate
The Vaadin Framework is not so typical to understand and can be easily integrated with another framework. The Vaadin framework offers plugin support for developers.
The Vaadin framework provides the following disadvantages for the developers:
Face problems to find skilled personnel
The Vaadin framework is recently is a new technology and due to which the properly skilled personnel are always on demand and they can be costly. It is more difficult to find resources that are capable of solving a complex problem with Vaadin.
No fancy User Interface
The Vaadin Framework is unable to design fancy UI because it focuses on business.
In a comparison of other technologies, Vaadin Framework is less scalable.
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