[jboss-user] [JBoss Seam] - Trouble calling Stateless Bean
I have a page to show the groups in my system. There are a series of links to allow the
user to modify the group. I am having trouble implementing the first of those links where
the user clicks to edit the group itself.
| <h:commandLink value="Edit Information"
action="#{editGroup.update}">
| <f:param name="groupId"
value="#{groupUsers.group.groupId}"/>
| </h:commandLink>
|
| @Name("editGroup")
| @Stateless
| public class EditGroup implements IEditGroup {
|
| @RequestParameter
| private Long groupId;
|
| @Logger
| private Log log;
|
| private EntityManager em;
|
| @In(create=false) @Out
| Group group;
|
| public String update() {
| //Verify groupId is set
| if(groupId == null || groupId.equals("")){return null;}
|
| Map<String, Object> parameters = new HashMap<String, Object>();
|
| log.info("\n\nFinding Group with groupId: " + groupId +
"\n\n");
|
| Query query = em.createQuery("from Group group where group.groupId =
:groupId");
| parameters.put("groupId", groupId);
|
| for (Entry <String, Object> param : parameters.entrySet()) {
| query.setParameter( param.getKey(), param.getValue() );
| }
| log.info("Querying for group");
| Group attachedGroup = (Group) query.getSingleResult();
| log.info("Found group object: " + group);
|
| if(group == null) {
| group = attachedGroup;
| } else {
| log.info("group was not null, attempting to update the attached group");
| attachedGroup.setName(group.getName());
| attachedGroup.setAddress(group.getAddress());
| attachedGroup.setAddress2(group.getAddress2());
| ...
| ...
| ...
| }
|
| return "editGroup";
| }
| }
|
|
The error when I click on the link is as follows:
| WARNING: Component _id13 just got an automatic id, because there was no id assigned
yet. If this component was created dynamically (i.e. not by a JSP tag) you should assign
it an explicit static id or assign it the id you get from the createUniqueId from the
current UIViewRoot component right after creation!
| 14:14:09,411 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw
exception
| javax.faces.FacesException: Error calling action method of component with id _id1
| at
org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:74)
| at javax.faces.component.UICommand.broadcast(UICommand.java:106)
| at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:90)
| at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:164)
| at
org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:316)
| at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106)
|
I'm probably doing my @Stateless bean completely against convention, but all I want is
to load the group on demand and update on demand, I dont' think it needs to be
statefull.
I thought I could just create a @Stateless bean and invoke it from anywhere, but I must be
missing something, help is needed with that *something*.
Thanks.
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