October 3rd, 2013 by Lincoln Baxter III

Create a dynamic Logout URL without a Servlet or JSP, using Rewrite

The code below implements a simple command mapping that binds logout functionality to a URL. To use this example, you must include the following [[Rewrite]] dependency in your project:

<dependency>
   <groupId>org.ocpsoft.rewrite</groupId>
   <artifactId>rewrite-servlet</artifactId>
   <version>${rewrite.version}</version>
</dependency>

Once your project is set up to include Rewrite, just paste the following code into your application source folder.

@RewriteConfiguration
public class LogoutConfiguration extends HttpConfigurationProvider
{

   @Override
   public Configuration getConfiguration(ServletContext context)
   {
      return ConfigurationBuilder.begin()
               .addRule()
               .when(Direction.isInbound().and(Path.matches("/logout")))
               .perform(new HttpOperation() {
                  @Override
                  public void performHttp(HttpServletRewrite event, EvaluationContext context)
                  {
                     event.getRequest().getSession().invalidate();
                  }
               }.and(Redirect.temporary(context.getContextPath() + "/")));
   }

   @Override
   public int priority()
   {
      return Integer.MIN_VALUE;
   }
}

Lincoln Baxter, III

About the author:

Lincoln Baxter, III is the Chief Editor of Red Hat Developers, and has worked extensively on JBoss open-source projects; most notably as creator & project lead of JBoss Forge, author of Errai UI, and Project Lead of JBoss Windup. This content represents his personal opinions, not those of his employer.

He is a founder of OCPsoft, the author of PrettyFaces and Rewrite, the leading URL-rewriting extensions for Servlet, Java EE, and Java web frameworks; he is also the author of PrettyTime, social-style date and timestamp formatting for Java. When he is not swimming, running, or playing competitive Magic: The Gathering, Lincoln is focused on promoting open-source software and making technology more accessible for everyone.

Posted in Rewrite

3 Comments

  1. Mircea says:

    Thank you so much. Great info and great product!

    1. You’re welcome and thank you! Also. Please let us know if we can improve or help in any way.

  2. chongma says:

    i can’t seem to add the

    .and(Redirect.temporary(context.getContextPath() + "/")

    after the .perform HttpOperation

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