CODEWITHSUNDEEP
javaweb-applicationswicketweb.xml
Max_Salah
Max_Salah

Reputation: 2497

How to build two Wicket applications

It is about the helloworld example on the following link:

http://wicket.apache.org/learn/examples/helloworld.html

The helloworld works fine and I can call the application with the url: http://localhost:8080/helloworld/. now I would like to expand the example for second application hellowolrd2 sothat when I call http://localhost:8080/helloworld2/ with the browser, a second page helloworld2 comes (similar to helloworld). Assumed I have the files HelloWorld2.java and HelloWorld2.html.What shall I change in the file web.xml?

Upvotes: 1

Views: 932

Answers (2)

Xavi López
Xavi López

Reputation: 27880

You don't really need to modify anything in web.xml. The only relevant setting defined there is the <filter-mapping> element

<filter-mapping>
    <filter-name>HelloWorldApplication</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

, which maps all requests (/*) made to the application (its context root) to the Wicket Filter (think of it as a servlet), which will handle all Wicket requests and direct them to the appropriate method (component constructor, event handler method, etc.).

In the example, you see the HelloWorld page when requesting http://localhost:8080/helloworld/ because HelloWorld is the home page defined in the WebApplication. helloworld is the context root for the webapp, so Wicket automatically takes you to the page defined in WebApplication#getHomePage(): 

@Override
public Class getHomePage() {
    return HelloWorld.class;
}

Notice that helloworld here is the application's context root. So unless you want to define some logic in getHomePage() to return a class or another depending on some criteria (don't really think this is what you're after), it will effectively serve HelloWorld.

Now, addressing your question, with Wicket you can mount (bookmarkable) pages to URL's using WebApplication#mountPage(): 

public class HelloWorldApplication extends WebApplication {
    @Override
    protected void init() {
        mountPage("/helloworld", HelloWorld.class);
        mountPage("/helloworld2", HelloWorld2.class);
    }

    @Override
    public Class getHomePage() {
        return HelloWorld.class;
    }
}

This would make http://localhost:8080/helloworld/ serve HelloWorld class, being the home page. But would also serve it requesting http://localhost:8080/helloworld/helloworld. Requesting http://localhost:8080/helloworld/helloworld2 would effectively serve HelloWorld2.

Or, if you really wanted http://localhost:8080/helloworld2/ to serve HelloWorld2, you should deploy another webapp, of course with its own web.xml, and with context-root helloworld2.

Upvotes: 3

Rangel Preis
Rangel Preis

Reputation: 394

You don't have two applications, actually you have two pages. The first (helloworld) was mapped by to respond as home page, it was defined in HelloWorldApplication:

@Override
public Class getHomePage() {
    return HelloWorld.class;
}

If you want localhost:8080/helloworld2/ just create a mapping in the init() method in HelloWorldApplication

@Override
public void init() {
super.init();
this.mountPage("/helloworld2", Helloworld2.class);
}

Upvotes: 1

Related Questions