JAVASCRIPT

Intergrate DWR into Your Java Web Application

If you want to build your Ajax application around a JavaScript framework, you will need to use Direct Web Remoting code. This article shows you how. It is excerpted from Hack 43 from the book Ajax Hacks, written by Bruce W. Perry (O'Reilly; ISBN: 0596101694). Copyright © 2007 O'Reilly Media, Inc. All rights reserved. Used with permission from the publisher. Available from booksellers or direct from O'Reilly Media.

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By: O'Reilly Media

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July 24, 2008

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To get DWR going with your JavaScript, you have to declare in web.xml a Java servlet that DWR uses. Here is the chunk of code that you have to add to web.xml. If web.xml already includes registered servlets, nest this newly declared servlet in with the existing ones (the same goes for the servlet-mappingelement):

<servlet>
      <servlet-name>dwr-invoker</servlet-name>
      <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
      <init-param>
          <param-name>debug</param-name>
          <param-value>true</param-value>
      </init-param>
</servlet>

<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

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