[jboss-user] [JBoss Seam] - jBPM can't evaluate method

smithbstl do-not-reply at jboss.com
Mon Apr 9 17:24:13 EDT 2007


I am taking my first stab at using jPdl page flows and can't get jBPM to recognize a component method.

I have a SFSB that contains two DataModels.  The first DataModel fills a clickable data table (AddressLookup.xhtml) which has a link to another page (AddressRequestListing.xhtml) with a second table filled by the second DataModel in the SFSB.

I keep getting this error
org.jbpm.JbpmException: couldn't evaluate expression '#{requestEntry.findRequests}'

Here is my page flow - pageflow.jpdl.xml

<pageflow-definition name="serviceRequestCreation">
  |     <start-page name="addressLookup" view-id="/AddressLookup.xhtml">
  |         <redirect/>
  |         <transition name="viewRequests" to="addressRequestListing">
  |             <action expression="#{requestEntry.findRequests}"/>
  |         </transition>
  |     </start-page>
  |     <page name="addressRequestListing" view-id="/AddressRequestListing.xhtml"/>
  | </pageflow-definition>

Here is pages.xml

<pages>
  |     <page view-id="/AddressLookup.xhtml">
  |         <begin-conversation join="true" pageflow="serviceRequestCreation"/>
  |     </page>
  | </pages>

Here is my SFSB

@Stateful
  | @Name("requestEntry")
  | public class RequestEntryAction implements com.stlouiscity.csb.ejb.action.RequestEntry {
  |     
  |     @PersistenceContext(unitName="CSB_Oracle", type=EXTENDED)
  |     private EntityManager em; 
  | 
  |     @In(create=true)
  |     private Address address;
  |     
  |     @In(create=true, required=false)
  |     private AddressLookup addressLookup;
  |     
  |     @DataModel("addresses")
  |     private List<ParcelAddress> addresses;
  |     
  |     @DataModelSelection(value="addresses")
  |     @Out(required=false)
  |     private ParcelAddress selectedAddress;
  | 
  |     @DataModel("requests")
  |     private List<ServiceRequest> requests;
  |     
  |     @DataModelSelection(value="requests")
  |     private ServiceRequest selectedRequest;
  | 
  |     public RequestEntryAction() {
  |     }
  | 
  |     public void findAddresses() {
  | 
  |         if (address.getStreetName() != null) {
  |             System.out.println("Address Is NOT NULL");
  |             //Find ParcelAddress
  |             Query q = em.createQuery("Select a From ParcelAddress a Where" +
  |                         " (a.structureAddress.nlc.streetDirection = :streetDirection OR :streetDirection IS NULL) AND" +
  |                         " (lower(a.structureAddress.nlc.streetName) LIKE :street) AND" +
  |                         " (((a.structureAddress.structureAddressPK.houseNumber = :houseNumber) OR" +
  |                         " (:houseNumber BETWEEN a.structureAddress.houseLow AND a.structureAddress.houseHigh)) OR (:houseNumber IS NULL))");
  |             q.setParameter("houseNumber",address.getHouseNumber());
  |             q.setParameter("streetDirection",address.getStreetDirection());
  |             q.setParameter("street",address.getStreetName().toLowerCase() + "%");
  | 
  |             addresses = q.getResultList();        
  |         } else {
  |             System.out.println("Address IS NULL");
  |         }         
  |     }
  |     
  |     public void findRequests() {
  |         System.out.println("**********Entered findRequests*************");
  |         System.out.println("**********Selected Address: " + selectedAddress.toString());
  |         Query q = em.createQuery("Select s From ServiceRequest Where" +
  |                 " s.parcelAddress = :parcelAddress");
  |         q.setParameter("parcelAddress",selectedAddress);
  |         requests = q.getResultList();
  |     }

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