Help with dashboard widget

Hi,

Wonder if anyone can help with something. I am trying to write a new dashboard widget. I’ve found a couple of pages on the web (http://cruisecontrol.sourceforge.net/widgets.html and http://www.nabble.com/Dashboard-PMD-widget...-td11127239.html), and looked up the source of the dashboard widgets as shipped with CC. Using these resources, I’ve written the following:

import net.sourceforge.cruisecontrol.dashboard.widgets.AbstractXslOutputWidget;

import net.sourceforge.cruisecontrol.dashboard.widgets.Widget;

public class VerifyIFPDashboardWidget extends AbstractXslOutputWidget implements Widget {

      public String getDisplayName() {

            return "Verify IFP Results";

      }

      public String getXslPath() {

            return "/webapps/cruisecontrol/xsl/verifyIFP.xsl";

      }

}

(instead of extending AbstractXslOutputWidget I have also tried writing my own ‘public Object getOutput(Map parameters)’ method. Both give the same result)

I’ve told CC about my new widget by adding it in dashboard-config.xml:

        <subtabs>

            <subtab class="net.sourceforge.cruisecontrol.dashboard.widgets.ErrorsAndWarningsMessagesWidget" />

            <subtab class="VerifyIFPDashboardWidget" />

        </subtabs>

I then restart CC. If I try to use dashboard with a browser, I see my list of projects; but then when I try to click on one (to see the screen with the tabs, and hopefully my new one), I get the following stack trace:

HTTP ERROR: 500

argument type mismatch

RequestURI=/dashboard/tab/build/detail/projectA

Caused by:

java.lang.IllegalArgumentException: argument type mismatch

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:585)

        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeExceptionHandler(MultiActionController.java:646)

        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.handleException(MultiActionController.java:616)

        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeNamedMethod(MultiActionController.java:451)

        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.handleRequestInternal(MultiActionController.java:384)

        at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)

        at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)

        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:858)

        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)

        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476)

        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:431)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)

        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)

        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)

        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)

        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)

        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

        at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)

        at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)

        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)

        at org.mortbay.jetty.Server.handle(Server.java:324)

        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)

        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)

        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)

        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)

        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)

        at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

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(The same stack trace is in the CC log file)

What have I done wrong? Any ideas?

Cheers

Nathan