AbstractXsltView getting params from http

[jamesclinton]

Getting an request parameter via AbstractXsltView.getParameters(HttpServletRequest) is always null.

eg url.
data-maintenance.htm?_flowId=create-user&_type=User

Is anyone else having problems like this?

Spring 1.2.7, SWF1.0

[klr8]

Could you provide a bit more info on your situation:
Are you triggering the XSLT view in a normal view state?
Are you using alwaysRedirectOnPause?
What exactly are you trying to do?
...

Erwin

[jamesclinton]

Hi Erwin,

Are you triggering the XSLT view in a normal view state?

Yes.

Are you using alwaysRedirectOnPause?

No

What exactly are you trying to do?

I am trying to get the request parameters from the URL which is modelled below:

The code defines a submenu action named 'Users', which has a URL command that declares the flow id and some additional variables '_rc' and '_search'.

<Action name="showUsersCategory">
 <Property name="display">Users</Property>
 <Property name="command">data-maintenance.htm?_flowId=view-report&amp;_rc=Users&amp;_search=no</Property>
</Action>

The req parametes are in the 'context.getRequestParameters().toString()' map when I enter the flow (setupForm) and after I exit doPostExecute, but they are lost when in my View extending AbstractXsltView:

At this point I only have the FlowExecutionKey.

protected Map getParameters(HttpServletRequest request) {
		Map params = super.getParameters(request);
		
		System.out.println("req params: " + request.getParameterMap().toString());

This previously worked in RC3..unfortunately the codebase isn't full of junit tests so without rolling back I cannot be sure of which version upgrade (either RC4 or 1.0) may of broke this functionality.

James

[klr8]

My guess is that you are using "alwaysRedirectOnPause". It is the default in SWF 1.0 so unless you explicitly set it to false you'll be getting POST-REDIRECT-GET behaviour.

This explains the behaviour you see: During the first POST request you have the request parameters you want. The view state will not directly render the view, instead it will issue a redirect which will cause a second GET request that refreshes the flow execution. This GET refreshes the flow and renders the view. It also only has a single request parameter: the flow execution key.

To turn off alwaysRedirectOnPause, specify it in your FlowExecutor config:

<flow:executor id="flowExecutor" registry-ref="flowRegistry">
   <flow:execution-attributes>
      <flow:alwaysRedirectOnPause value="false"/>
   </flow:execution-attributes>
</flow:executor>

Erwin

[jamesclinton]

Erwin

Currently I'm still on Spring 1.2.7 for the next few weeks..could you kindly share the configuration based on DOCTYPE not XSD.

	<!-- Launches new flow executions and resumes existing executions Spring 1.2 configuration-->	
	<bean id="flowExecutor" class="org.springframework.webflow.config.FlowExecutorFactoryBean">
		<property name="definitionLocator" ref="flowRegistry"/>
		<property name="alwaysRedirectOnPause" value="false"/> ???
	</bean>

	<!-- Creates the registry of flow definitions for this application Spring 1.2 configuration -->
	<bean id="flowRegistry" class="org.springframework.webflow.engine.builder.xml.XmlFlowRegistryFactoryBean">
		<property name="flowLocations" value="/WEB-INF/flow/*.xml"/>
	</bean>

Thank you.

[klr8]

Here it is:

<bean id="flowExecutor" class="org.springframework.webflow.config.FlowExecutorFactoryBean">
  <property name="definitionLocator" ref="flowRegistry"/>
  <property name="executionAttributes">
    <map>
      <entry key="alwaysRedirectOnPause" value="false"/>
    </map>
  </property>
</bean>

Erwin

[jamesclinton]

Great. Many thanks Erwin.

[klr8]

Or rather, you'll need:

<entry key="alwaysRedirectOnPause">
  <value type="java.lang.Boolean">false</value>
</entry>

Since it needs to be a boolean.

Erwin

[jamesclinton]

Erwin

Unfortunately this configuration throws an exception:

IllegalArgumentException: Map key 'alwaysRedirectOnPause' has value [false] that is not of expected type [class java.lang.Boolean], instead it is of type [java.lang.String]

James

[klr8]

Check my previous post

This will be improved in SWF 1.0.1, where it will also accept the String values "true" or "false".

Erwin