Using beanshell script in jPDL pageflows

05. Aug 2008, 01:57 CET | Link Manuel Gombocz

Hi,

I would like to use beanshell script functionality in pageflows. Especially, to show the user the progress of his operation: Page 1 of 4, Page 2 of 4 and so forth.

I already successfully realized it with Seam 1.1.6 last year, but now (2.0.2.SP1) I got following errors/warnings:

The pageflow I used with Seam 1.1.6:

<pageflow-definition name="createEmployee">

<event type="process-start" >

<script>

<expression>

int total = 3;

int current = 1;

</expression>

<variable name="totalPages" mapped-name="total" access="write" />

<variable name="currentPage" mapped-name="current" access="write" />

</script>

</event>

<start-page name="createEmployee" view-id="/editEmployee.xhtml">

...

</start-page>

<page name="createUser" view-id="/editUser.xhtml">

<redirect />

<transition name="cancel" to="cancelled" />

<transition name="save" to="enterRoles">

<script>

<expression>current++;</expression>

<variable name="currentPage" mapped-name="current" access="read,write" />

</script>

</transition>

</page>

...

</pageflow-definition>

I accessed these variables in JSF like this:

<s:div rendered="#{pageflow.inProcess}" styleClass="dialog">

Page #{pageflow.processInstance.contextInstance.variables['currentPage']} of #{pageflow.processInstance.contextInstance.variables['totalPages']}

</s:div>

If I reuse the pageflow in Seam 2.0.2.SP1 I got following error:

Caused by: org.jbpm.jpdl.JpdlException: [[ERROR] line 11: cvc-complex-type.2.4.a: Invalid content was found starting with element 'script'. One of '{"http://jboss.com/products/seam/pageflow":action}' is expected., [ERROR] line 31: cvc-complex-type.2.4.a: Invalid content was found starting with element 'script'. One of '{"http://jboss.com/products/seam/pageflow":condition, "http://jboss.com/products/seam/pageflow":action, "http://jboss.com/products/seam/pageflow":exception-handler}' is expected., [ERROR] line 48: cvc-complex-type.2.4.a: Invalid content was found starting with element 'script'. One of '{"http://jboss.com/products/seam/pageflow":action, "http://jboss.com/products/seam/pageflow":exception-handler}' is expected.]

Then I changed the script blocks in the pageflow by surrounding them with <action> blocks:

<event type="process-start">

<action>

<script>

<expression>

int total = 2;

int current = 1;

</expression>

<variable name="totalPages" mapped-name="total" access="write" />

<variable name="currentPage" mapped-name="current" access="write" />

</script>

</action>

</event>

In this case I receive the following warning:

01:50:27,625 WARN [JpdlXmlReader] process xml warning: action does not have class nor ref-name attribute <action xmlns="http://jboss.com/products/seam/pageflow" config-type="field" accept-propagated-events="true">

With this warning the script variables are not accessible in my JSF.

Do you know what I am doing wrong or what I have to change to make it work like with Seam 1.1.6?

Many thanks in advance, Manuel

<process-definition>
  <event type="process-end">
    <script>
      <expression>
        a = b + c;
      </expression>
      <variable name='XXX' access='write' mapped-name='a' />
      <variable name='YYY' access='read' mapped-name='b' />
      <variable name='ZZZ' access='read' mapped-name='c' />
    </script>
  </event>
  ...
</process-definition>