How to Easily Setup Apache Wicket with Maven

In this tutorial we will setup a “basic” Apache Wicket Project using Maven. In this setup it is assumed that you already have a Java Development Kit(JDK) installed.

What we need?

1. Maven 3.03 which is the latest stable release at the time of writing.
2. An IDE such as Eclipse or Netbeans.

What is Maven?

To know more about Maven please read the links below.

• What is Maven?
• Maven Features

Installing Maven

Follow the Installation Instructions in Maven Website.

Building the Project

The most easy way to get started with Apache Wicket is to create a Wicket Quickstart Project with Maven. Apache wicket has provided a tool to generate the command line. In this example I will create a package/GroupId named “blogger.codeknowhow” which is where my HTML and Java files are located and a project name “hellowicket”. It is important to note that the project name or ArtifactId should be a single word.

mvn archetype:generate -DarchetypeGroupId=org.apache.wicket 
-DarchetypeArtifactId=wicket-archetype-quickstart 
-DarchetypeVersion=1.5.2 
-DgroupId=blogger.codeknowhow 
-DartifactId=hellowicket
-DarchetypeRepository=https://repository.apache.org/
-DinteractiveMode=false

Open command line or terminal and change directory to the directory where you want your project to be located.

cd path/to/myprojects

Copy and paste the generated code into the command line or terminal. If you have installed Maven correctly Maven will automatically download and setup the project.

Test your project change directory to your project directory in my case.

cd hellowicket

Inside the project directory start the jetty server.

mvn jetty:run

Maven will first compile our project and download all the dependencies that our Quickstart Project have setup. After that Maven will automatically start our jetty server. Now point your browser to http://localhost:8080 you should see

Open the Project to IDE

Eclipse

Eclipse needs to know the path to the local Maven repository. 

mvn -Declipse.workspace=<path-to-eclipse-workspace> eclipse:add-maven-repo

To generate the Eclipse project files from your POM

mvn eclipse:eclipse

In Eclipse choose FILE->IMPORT->EXISTING PROJECT and navigate to the folder where your project exist, then import.

Netbeans

Netbeans by default has Maven project support so just OPEN PROJECT(CTRL+SHIFT+O), then navigate to your project folder.

Now you can start developing your own wicket application!

How to enable Foreign Keys in Sqlite3 Java

Recently I have created a database in SQLite with tables that has foreign keys ON DELETE CASCADE actions. To my surprise when I deleted the parent key each row of the child table associated with the parent key are not deleted. The answer is that by default in SQLite  foreign key support is turned off for compatibility. To enable foreign keys using Xerial SQLite JDBC Driver We have to enforce foreign key support every time we make a query.

public static final String DB_URL = "jdbc:sqlite:database.db";
public static final String DRIVER = "org.sqlite.JDBC";

public static Connection getConnection() throws ClassNotFoundException {
    Class.forName(DRIVER);
    Connection connection = null;
    try {
        SQLiteConfig config = new SQLiteConfig();
        config.enforceForeignKeys(true);
        connection = DriverManager.getConnection(DB_URL,config.toProperties());
    } catch (SQLException ex) {}
    return connection;
}