[rules-users] UserTask parameters mapping and gwt-console

Juan Ignacio Barisich juan.barisich at fluxit.com.ar
Wed Nov 3 20:37:13 EDT 2010 

Hi.
I'm using the gwt-console and trying to set a parameter mapping to send some
variables from the process to a task.
First, the variables are setted in the process like:
<header>
    <variables>
      <variable name="myVariableA" >
        <type
name="org.drools.process.core.datatype.impl.type.ObjectDataType"
className="String" />
      </variable>
      <variable name="myVariableB" >
        <type
name="org.drools.process.core.datatype.impl.type.ObjectDataType"
className="String" />
      </variable>
    </variables>
  </header>
The parameter mapping is:
<humanTask id="3" name="Revisar Solicitud" x="119" y="143" width="162"
height="48" >
      <work name="Human Task" >
       ...
      </work>
      <mapping type="in" from="myVariableA" to="myVariableA" />
      <mapping type="in" from="myVariableB" to="myVariableB" />
    </humanTask>
Then I have a ftl file for the task form like:
<html>
...
<body>
A value: ${myVariableA}</br>
Another value: ${myVariableB}</br>
...
</body>
</html>

With this code, when I select a task and click "View", I get the following
exception:
---------------------------------------------------------------------------------------------------------------------------------------------------------
org.jboss.resteasy.spi.UnhandledException: java.lang.RuntimeException:
Failed to process form template

org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:319)

org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:230)

org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:206)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:360)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:173)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:93)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:68)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
causa raíz

java.lang.RuntimeException: Failed to process form template

org.drools.integration.console.forms.AbstractFormDispatcher.processTemplate(AbstractFormDispatcher.java:104)

org.drools.integration.console.forms.TaskFormDispatcher.provideForm(TaskFormDispatcher.java:111)

org.drools.integration.console.forms.FormDispatcherComposite.provideForm(FormDispatcherComposite.java:50)

org.jboss.bpm.console.server.FormProcessingFacade.provideForm(FormProcessingFacade.java:203)

org.jboss.bpm.console.server.FormProcessingFacade.renderTaskUI(FormProcessingFacade.java:125)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

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

sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)

org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:117)

org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:260)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:232)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:166)

org.jboss.resteasy.core.DispatcherUtilities.getJaxrsResponse(DispatcherUtilities.java:142)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:173)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:93)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:68)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
causa raíz

freemarker.core.InvalidReferenceException: Expression myVariableA is
undefined on line 5, column 39 in Evaluacion.
    freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
    freemarker.core.Expression.getStringValue(Expression.java:118)
    freemarker.core.Expression.getStringValue(Expression.java:93)
    freemarker.core.DollarVariable.accept(DollarVariable.java:76)
    freemarker.core.Environment.visit(Environment.java:209)
    freemarker.core.MixedContent.accept(MixedContent.java:92)
    freemarker.core.Environment.visit(Environment.java:209)
    freemarker.core.Environment.process(Environment.java:189)
    freemarker.template.Template.process(Template.java:237)

org.drools.integration.console.forms.AbstractFormDispatcher.processTemplate(AbstractFormDispatcher.java:87)

org.drools.integration.console.forms.TaskFormDispatcher.provideForm(TaskFormDispatcher.java:111)

org.drools.integration.console.forms.FormDispatcherComposite.provideForm(FormDispatcherComposite.java:50)

org.jboss.bpm.console.server.FormProcessingFacade.provideForm(FormProcessingFacade.java:203)

org.jboss.bpm.console.server.FormProcessingFacade.renderTaskUI(FormProcessingFacade.java:125)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

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

sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    java.lang.reflect.Method.invoke(Method.java:597)

org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:117)

org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:260)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:232)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:166)

org.jboss.resteasy.core.DispatcherUtilities.getJaxrsResponse(DispatcherUtilities.java:142)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)

org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:173)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:93)

org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:68)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
---------------------------------------------------------------------------------------------------------------------------------------------------------
Is this a bug? or I'm doing something wrong?

Thanks in advance
-- 

*Juan Ignacio Barisich*
juan.barisich at fluxit.com.ar
www.fluxit.com.ar
53 n366, piso 9
La Plata / Buenos Aires / Argentina
(54)-221-427-5781 int:308
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