[jboss-user] [JBoss Seam] - can't quite get push-style mvc working
I am trying to emulate the "push"-style section 1.10.3 in Chapter 1. Seam
Tutorial.
When I load the page I want data to get pushed to initially, nothing happens in console
and the data is not loaded, despite the page loading as normal. So I am assuming the EJB
is never actually getting called. Even if I am not actually Outjecting anything to the
view, when the findFirstPage method gets called in the EJB, it should be outputing debug
text to the console, which it never does.
So what I want to do is for a user to go to /showGroups.seam, which is mapped to the file
showGroups.jsp, and for an arbitrary list of default groups to be pushed to the view, and
the page will also allow the user to search for groups. But a big part of the
functionality is showing those initial groups.
Here is my code:
pages.xml
| <pages>
| <page
view-id="/showGroups.seam">#{groupFinder.findFirstPage}</page>
| </pages>
|
GroupFinderBean.java with non relevant code removed
| @Name("groupFinder")
| @Stateful
| @Scope(ScopeType.SESSION)
| public class GroupFinderBean implements GroupFinder {
|
| @Logger
| private Log log;
|
| @DataModel
| private List<Group> groupList;
|
|
| @PersistenceContext
| private EntityManager entityManager;
|
| private void executeQuery() {
| Map<String, Object> parameters = new HashMap<String, Object>();
| StringBuffer queryString = new StringBuffer();
|
| log.info("searchColumns: " + Arrays.asList(searchColumns));
|
|
| //*******************************************************//
| // Handle case when a user clicks on a letter
| //*******************************************************//
| if(start != null && !start.equals("")) {
| queryString.append(" or group.name" + " like :value or group.name
like :valuetwo ");
| parameters.put("value", start + "%");
| parameters.put("valuetwo", start.toLowerCase() + "%");
| }
|
|
| //************************************************************//
| // Handle case when a user is searching via the search field
| //************************************************************//
| if(searchField != null ) {
| int x = 0;
| for(String searchColumn : searchColumns) {
| if(searchField.contains("%")) {
| queryString.append(" or group." + searchColumn + " like :" +
searchColumn);
| } else {
| queryString.append(" or group." + searchColumn + " = :" +
searchColumn);
| }
| parameters.put( searchColumn, searchField );
| x++;
| }
| }
|
| //************************************************************//
| // Handle case when a user enters no input, but clicks search
| //************************************************************//
| if(queryString.length() == 0) {
| queryString.append("select group from Group group");
| } else {
| queryString.delete(0, 3).insert(0, "select group from Group group where
");
| }
|
| if(order!=null) {
| queryString.append(" order by group.").append(order);
| if (descending) queryString.append(" desc");
| }
|
|
| log.info("searchField: " + searchField + " queryString: \n\n" +
queryString + "\n\n");
|
| Query query = entityManager.createQuery(queryString.toString());
| for (Entry <String, Object> param : parameters.entrySet()) {
| query.setParameter( param.getKey(), param.getValue() );
| }
| groupList = (List<Group>) query.setMaxResults(pageSize)
| .setFirstResult(pageSize*pageNumber)
| .getResultList();
| }
|
| public String findFirstPage() {
| log.info("Find First Page");
| pageNumber=0;
| executeQuery();
| return null;
| }
| }
|
web.xml
| <servlet-mapping>
| <servlet-name>Faces Servlet</servlet-name>
| <url-pattern>*.seam</url-pattern>
| </servlet-mapping>
|
I'm thinking it may have something to do with the scope of the EJB, as the EJB in the
Blog example is Stateless, mine is Stateful.
Thanks for the help.
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