7 Replies Latest reply on Oct 2, 2008 11:26 PM by amontobin

    Dynamic UI Components and Seam Managed Persistent Context.Bug ?

    amontobin
    amontobin Jun 20, 2008 1:05 AM

      Hi Seam Users,


      I'm trying to create a dynamic interface with buttons and input create on the fly. I've got a controller which is responsible to build the interface and to respond to different actions. My problem is that i cannot use a seam manage persistent context :
      The Exception is : @In attribute requires non-null value: sayhello.entityManager


      I try with a static page (CommandButton and AjaxCommandButton)
      1. Persistent Context OK
      2. Persistent Context EXTENDED OK
      3. In (SMPC) OK


      WIth a dynamic page :
      1. Persistent COntext OK
      2. Persistent Context EXTENDED OK
      3. In (SMPC) NOK. Exception


      Have you any ideas to help ?


      Thank you very much,


      Sebastien


      Seam 2.0.1.SP1


      Here is the code of the controller :



      @Stateful
@Name("sayhello")
@Scope(SESSION)
public class SayHelloController implements SayHelloControllerLocalInterface {

        @In
        EntityManager entityManager;

        private String name;

        public String getName() {
                return name;
        }

        public void setName(String name) {
                this.name = name;
        }

        public String getMessage() {
                return "Hello " + getName();
        }

        public String submit() {
                testpersist();
                return null;
        }

        public String back() {
                return null;
        }

        public String testpersist() {
                SiteImpl site = new SiteImpl();
                site.setName("test");
                site.setUrl("test");
                entityManager.persist(site);
                return null;
        }

        public void test() {
                testpersist();
        }

        public void processAction(ActionEvent e) {
                testpersist();
        }

        private HtmlPanelGrid grid;

        public HtmlPanelGrid getGrid() {
                if (grid == null) {
                        Application app = FacesContext.getCurrentInstance().getApplication();
                        grid = (HtmlPanelGrid) app.createComponent(HtmlPanelGrid.COMPONENT_TYPE);
                        grid.setStyle("width : 100%;");
                        grid.setColumns(1);
                        grid.getChildren().add(getTestButton());
                }
                return grid;
        }

        public void setGrid(HtmlPanelGrid grid) {
                this.grid = grid;
        }

        private HtmlAjaxCommandButton testButton;

        public HtmlAjaxCommandButton getTestButton() {
                if (testButton == null) {
                        // Button RemoveFromCart
                        testButton = HtmlAjaxCommandButtonFactory.createRemoveCartButton();
                        Faces.setMethodExpression(testButton, "#{sayhello.testpersist}", "actionExpression", String.class, new Class[] {});

                }
                return testButton;
        }

        public void processAction(javax.faces.event.ActionEvent event) throws javax.faces.event.AbortProcessingException {
                testpersist();
        }

        public String getBinding() {
                return "sayhello";
        }

        @Remove
        public void destroy() {

        }
}




      Here is the code of the page :


      <html xmlns="http://www.w3.org/1999/xhtml"
     xmlns:ui="http://java.sun.com/jsf/facelets"
     xmlns:h="http://java.sun.com/jsf/html"
     xmlns:f="http://java.sun.com/jsf/core"
     xmlns:s="http://jboss.com/products/seam/taglib"
     xmlns:c="http://java.sun.com/jstl/core"
     xmlns:a4j="http://richfaces.org/a4j">
<head>
   Name!
</head>
<body>
        <f:view>
        <h:form id="form">
                <h:panelGrid binding="#{sayhello.grid}"/>
        </h:form>
    </f:view>  
</body>
</html>


      • 331 Views
      • Tags: