DwrController problem

[erjablow]

I am trying to use DWR with Spring 2.5.6, and I cannot get DWR to vend /dwr/engine.js and its related JavaScript files. In fact, I ended up putting a breakpoint in DispatchServlet, and the attempt to get /dwr/engine.js raised an exception with message:

No adapter for handler [org.directwebremoting.spring.DwrController@13777b3]: Does your handler implement a supported interface like Controller?

DwrController extends Spring's AbstractController, which implements Controller, and so I am badly confused.

[banzai1972]

Hi,

you have to add a DefaultHandler like:

<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />

Here's a sample context:

<!-- DefaultHandlerAdapter   -->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
    
    <!-- Url-Mapping for DWR.  -->
    <!-- wep_appname/contexRoot/engine.js  -->
    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
	 
	  <property name="mappings">
	  <props>
	    <prop key="/engine.js">dwrController</prop>
	    <prop key="/util.js">dwrController</prop>
	    <prop key="/call/**">dwrController</prop>
	    <prop key="/interface/**">dwrController</prop>
	  </props>
	  </property>
    </bean>

    <!-- mandatory  -->
    <dwr:controller id="dwrController" debug="true" />

    <!-- mandatory too, can be empty -->
    <!-- dem Spring-Context stehen. -->        
    <dwr:configuration/>

    <!-- Sample-DWR-Remote -->
	<bean id="dwrService" class="net.yourPackage.YourRemoteClass">
	   <dwr:remote javascript="YourDWRServiceName">
	       <dwr:include method="exposedMethod" />
           <dwr:convert type="bean" class="net.yourpage.AnotherTypeReturnedByYourService" />
           <dwr:convert type="exception" class="java.lang.Exception"/>
           <dwr:convert type="bean" class="java.lang.StackTraceElement"/>
	   </dwr:remote>
	</bean>

Annotation:

• dwr:configuration:
  You can use this bean for dws:remote-entries. But then you have no spring-di in your remoteController.
• urlMapping:
  Internally the DwrController looks for path (without context-path) beginning with /engine.js, /call/... So, if you have a path something like /dwr/engine.js (or webapp_name/aContextPath/dwr/engine.js) the DwrController cant find this in his own map.
• Use exception-handling carefully (for security reasons)

Another, and better solution, can be found here

Best Regard
michael