The basic web flow does not work

[clark]

I have been trying for 3 days now to get a web flow to work. I am down to a single transition that does not work and my frustration is reaching a Postal Service level.

Here is my setup...

I am running
Spring 3.0.0.RELEASE
WebFlow 2.0.9.RELEASE
Tomcat 6.0.26
Fedora 11

Here is my Spring configuration file :

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xmlns:mvc="http://www.springframework.org/schema/mvc"
	   xmlns:context="http://www.springframework.org/schema/context"
       xmlns:webflow="http://www.springframework.org/schema/webflow-config"
	   xsi:schemaLocation="
            http://www.springframework.org/schema/beans	          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
            http://www.springframework.org/schema/mvc             http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
            http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-3.0.xsd
            http://www.springframework.org/schema/webflow-config  http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.0.xsd
        ">

	<!-- Scans the classpath of this application for @Components to deploy as beans -->
	<context:component-scan base-package="net.kb" />

	<!-- Configures the @Controller programming model -->
	<mvc:annotation-driven />

    <!-- Allows for the @RequestMapping at the class level. -->
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>

    <!-- Allows for the @RequestMapping at the method level. -->
    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>

	<!-- Resolves view names to protected .jsp resources within the /WEB-INF/views directory -->
    <!--
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<property name="suffix" value=".jsp"/>
	</bean>
    -->

    <!-- WebFlow stuff -->
    <bean id="webflowUrlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <value>
                /testFlowBasic.php=flowHandler
            </value>
        </property>
    </bean>

    <bean id="flowHandler" class="org.springframework.webflow.mvc.servlet.AbstractFlowHandler"/>

    <bean class="org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
        <property name="flowExecutor" ref="flowExecutor"/>
    </bean>

    <webflow:flow-executor id="flowExecutor" flow-registry="flowRegistry"/>

    <webflow:flow-registry id="flowRegistry">
        <webflow:flow-location path="/WEB-INF/jsp/testFlowBasic.xml"/>
    </webflow:flow-registry>


</beans>

Here is my webflow configuration file :

<?xml version="1.0" encoding="UTF-8"?>

<flow   xmlns="http://www.springframework.org/schema/webflow"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.springframework.org/schema/webflow
                            http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd">

  <global-transitions>
    <transition on="Cancel" to="cancelPage" />
  </global-transitions>


  <view-state id="basicFlowStep1" view="basicFlowStep1.jsp">
    <transition on="Next" to="summaryPage" />
  </view-state>

  <view-state id="cancelPage" view="flow01cancel.jsp" />

  <end-state id="summaryPage" view="endflow01.jsp" />

</flow>

Here is the error I get when I try to hit the webflow :

org.xml.sax.SAXParseException: cvc-complex-type.2.4.a: Invalid content starting with element 'view-state'. The content must match '(("http://www.springframework.org/schema/webflow":attribute){0-UNBOUNDED},("http://www.springframework.org/schema/webflow":secured){0-1},("http://www.springframework.org/schema/webflow":persistence-context){0-1},("http://www.springframework.org/schema/webflow":var){0-UNBOUNDED},("http://www.springframework.org/schema/webflow":input){0-UNBOUNDED},("http://www.springframework.org/schema/webflow":on-start){0-1},(("http://www.springframework.org/schema/webflow":action-state)|("http://www.springframework.org/schema/webflow":view-state)|("http://www.springframework.org/schema/webflow":decision-state)|("http://www.springframework.org/schema/webflow":subflow-state)|("http://www.springframework.org/schema/webflow":end-state)){0-UNBOUNDED},("http://www.springframework.org/schema/webflow":global-transitions){0-1},("http://www.springframework.org/schema/webflow":on-end){0-1},("http://www.springframework.org/schema/webflow":output){0-UNBOUNDED},("http://www.springframework.org/schema/webflow":exception-handler){0-UNBOUNDED},("http://www.springframework.org/schema/webflow":bean-import){0-UNBOUNDED})'.
	org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
	org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
	javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:124)
	org.springframework.webflow.engine.model.builder.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:113)
	org.springframework.webflow.engine.model.builder.xml.XmlFlowModelBuilder.init(XmlFlowModelBuilder.java:113)
	org.springframework.webflow.engine.model.builder.DefaultFlowModelHolder.assembleFlowModel(DefaultFlowModelHolder.java:87)
	org.springframework.webflow.engine.model.builder.DefaultFlowModelHolder.getFlowModel(DefaultFlowModelHolder.java:61)
	org.springframework.webflow.engine.builder.model.FlowModelFlowBuilder.doInit(FlowModelFlowBuilder.java:147)
	org.springframework.webflow.engine.builder.support.AbstractFlowBuilder.init(AbstractFlowBuilder.java:46)
	org.springframework.webflow.engine.builder.FlowAssembler.assembleFlow(FlowAssembler.java:90)
	org.springframework.webflow.engine.builder.DefaultFlowHolder.assembleFlow(DefaultFlowHolder.java:109)
	org.springframework.webflow.engine.builder.DefaultFlowHolder.getFlowDefinition(DefaultFlowHolder.java:84)
	org.springframework.webflow.definition.registry.FlowDefinitionRegistryImpl.getFlowDefinition(FlowDefinitionRegistryImpl.java:61)
	org.springframework.webflow.executor.FlowExecutorImpl.launchExecution(FlowExecutorImpl.java:138)
	org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:193)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

I have reduced my view-state tag to its bare minimum and still the SAX parser complains that my view-state does not parse. I am at the end of my rope. Can somebody offer some good advice on how to get this mess working?

[Marten Deinum]

Well read the stacktrace... The ordering of the elements is wrong.

Global transitions should be at the end of the xml not at the start.

[clark]

Thank you for your response, Marten. I don't see any mention in the stack trace that the tags are ordered incorrectly, but I believe you and I will give that a try.

On reviewing the Schema for webflow I see that the global-transitions tag does come after the view-state tag, but the error message seemed to be saying that there was a problem with parsing the view-state tag.

Yours,

Clark

Time passes...

Yes, you are correct once again, Marten. I had some other minor issues, but you got me past my hurdle. The Spring folks should really call this WebFlow forum the Marten Deinum forum. You do have the answers.