[jboss-user] [JBoss Seam] - commandLink not initially executing action when clicked

[sjmenden]

I have a page which allows me to search for registered users to a site.  

The part of the page I have a problem with is as follows, page: showUsers.jsp which makes calls to an EJB3 called userFinder


  | <h:commandLink value="S" action="#{userFinder.findFirstPage}"  styleClass="alpha_list">
  |   <f:param name="start" value="S"/>
  | </h:commandLink>
  | 

Here is the problem.  When I initially hit the showUsers.jsp page and click on the link defined above, the page refreshes but nothing happens on the page or in the console output.
HOWEVER, if I first search for a user (code not shown) THEN I click the link above, then it works and shows me all users starting with the letter S.

It seems like something contexual, but I don't understand why the #{userFinder.findFirstPage} action isn't working on the commandLink before I search for something.


  | @Name("userFinder")
  | @Stateful
  | @Scope(ScopeType.SESSION)
  | public class UserFinderBean implements UserFinder {
  |     
  | 	private User example = new User();
  | 	public User getExample() {
  | 			return example;
  | 	}
  | 	
  | 	
  | 	private String[] searchColumns;
  | 	public String[] getSearchColumns() {
  | 		return searchColumns;
  | 	}
  | 	public void setSearchColumns(String[] searchColumns) {
  | 		this.searchColumns = searchColumns;
  | 	}
  | 	
  | 	
  | 	private SelectItem[] searchColumnItems = new SelectItem[] {
  | 		new SelectItem("username", "Username"),
  | 		new SelectItem("firstName", "First"),
  | 		new SelectItem("lastName", "Last"),
  | 		new SelectItem("company", "Company"),
  | 		new SelectItem("email", "Email")
  | 	};
  | 	public SelectItem[] getSearchColumnItems() {
  | 		return searchColumnItems;
  | 	}
  | 	
  | 	private int pageNumber = 0;
  | 	private int pageSize = 15;
  | 	public void setPageSize(int size) {
  | 			pageSize = size;
  | 	}
  | 	public int getPageSize() {
  | 			return pageSize;
  | 	}
  | 	
  | 	public boolean isPreviousPage() {
  | 			return userList!=null && pageNumber>0;
  | 	}
  | 	public boolean isNextPage() {
  | 			return userList!=null && userList.size()==pageSize;
  | 	}
  | 		
  | 	@Logger
  | 	private Log log;
  | 	
  | 	@DataModel
  | 	private List<User> userList;
  | 	
  | 	@DataModelSelection
  | 	private User selectedUser;
  | 	
  | 	@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 user.username" + " like :value or user.username like :valuetwo ");
  | 			parameters.put("value", start + "%");
  | 			parameters.put("valuetwo", start.toLowerCase() + "%");
  | 		}
  | 		
  | 
  | // 		if(example.getUsername() != null ) {
  | // 			if(example.getUsername().contains("%")) {
  | // 				queryString.append(" and user.username like :username");
  | // 			} else {
  | // 				queryString.append(" and user.username = :username");
  | // 			}
  | // 			parameters.put( "username", example.getUsername() );
  | // 		}
  | 		
  | 		if(example.getUsername() != null ) {
  | 			int x = 0;
  | 			for(String searchColumn : searchColumns) {
  | 				if(example.getUsername().contains("%")) {
  | 					queryString.append(" or user." + searchColumn + " like :" + searchColumn);
  | 				} else {
  | 					queryString.append(" or user." + searchColumn + " = :" + searchColumn);
  | 				}
  | 				parameters.put( searchColumn, example.getUsername() );
  | 				x++;
  | 			}
  | 		}
  | 
  | 		if(queryString.length() == 0) {
  | 			queryString.append("select user from User user");
  | 		} else {
  | 			queryString.delete(0, 3).insert(0, "select user from User user where ");
  | 		}
  | 		
  | 		if(order!=null) {
  | 			queryString.append(" order by user.").append(order);
  | 			if (descending) queryString.append(" desc");
  | 		}
  |         
  | 				
  | // 				Properties of a JavaBean can be bound to named query parameters:
  | // 
  | // 				Query q = s.createQuery("from foo Foo as foo where foo.name=:name and foo.size=:size");
  | // 				q.setProperties(fooBean); // fooBean has getName() and getSize()
  | // 				List foos = q.list();
  | 				
  | 		log.info("example.username: " + example.getUsername() + " 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() );
  | 		}
  | 		userList = (List<User>) query.setMaxResults(pageSize)
  | 						.setFirstResult(pageSize*pageNumber)
  | 						.getResultList();
  |     }
  |     
  |     public String findFirstPage() {
  | 			log.info("Find First Page");
  | 			pageNumber=0;
  | 			executeQuery();
  | 			return null;
  |     }
  |     
  |     public String findNextPage() {
  |         pageNumber++;
  |         executeQuery();
  |         return null;
  |     }
  |     
  |     public String findPreviousPage() {
  |         pageNumber--;
  |         executeQuery();
  |         return null;
  |     }
  |     
  |     public void refresh() {
  |         if (userList!=null) executeQuery();
  |     }
  |     
  |     public String clear() {
  |         userList=null;
  |         example = new User();
  |         return null;
  |     }
  |     
  |     public User getSelection() {
  |         return entityManager.merge( selectedUser );
  |     }
  |         
  |     @Destroy @Remove
  |     public void destroy() {}
  |     
  |     private String order;
  |     private boolean descending = false;
  |     
  |     @RequestParameter
  |     private String orderBy;
  | 		
  | 		@RequestParameter
  |     private String start;
  | 
  |     public String reorder() {
  |         if (orderBy.equals(order)) {
  |             descending = !descending;
  |         }
  |         else {
  |             descending = false;
  |         }
  |         order = orderBy;
  |         executeQuery();
  |         return null;
  |     }
  | 
  | }
  | 

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