Database call fired twice when using actionListener in dataTable

Question

Hi all,
I have a question regarding the request bean lifecylce in the current use case (using Sun JSF 1.2)
I have a managed bean in request scope that contains an ArrayList which is used as the data provider in a dataTable on a faces page.
The bean contains an init() method to populate the ArrayList using a database call.
The dataTable also contains a column with a commandLink that calls a method via actionListener inside the managed bean to delete the current row.
When I click the link the action gets called and deletes the row from the database. I also reload the data from the database and assign it to my ArrayList.
However, the init Method is also called before the action is executed. So the database call is fired twice when hitting the link:
- First time in the init() method of the bean
- Second time in the actionListener method when reloading the data
I can not remove the call from the actionListener, because the data has not deleted yet.
Question:*
How can I make sure the database call is fired once only? (and also making sure the ArrayList is populated appropriate)
Maybe I am doing something wrong here? Thanks in advance for any help.
Maik
This is the request scope bean:
public class UserBean implements Serializable {
    private List all;
    private Long userId = null;
    @PostConstruct
    public void init() {
        if(all == null) {
            new ArrayList();
            loadUserList();
     * Constructor
    public UserBean() {
        super();
     * @return the userId
    public Long getUserId() {
        return userId;
     * @param userId
     *            the userId to set
    public void setUserId(Long userId) {
        this.userId = userId;
     * @param all
     *            the all to set
    public void setAll(List all) {
        this.all = all;
    public List getAll() throws GeneralModelException {
        return all;
    public void loadUserList() {
        EntityManager em = Contexts.getEntityManager();
        Query q = em.createNamedQuery("user.findAll");
        all = q.getResultList();
    public void deleteAction(ActionEvent ae) {
        EntityManager em = Contexts.getEntityManager();
        Query q = em.createNamedQuery("user.byId");
        q.setParameter("id", userId);
        try {
            User user = (User) q.getSingleResult();
            if (user != null) {
                em.remove(user);
                loadUserList();
        } catch (NoResultException e) {
            // TODO
}

Answer 1

No, I do not call the init() method.
Basically the init() is called before the deleteAction() so the ArrayList still contains the old value, unless a second database call is triggered after the entity has been deleted.
Maybe I am missing something here...
See also here (JSF 1.2 RI - Bean Instantiation and Annotation)
[http://weblogs.java.net/blog/jhook/archive/2007/05/jsf_12_ri_backi.html]
Here is the init() call stack trace
Daemon Thread [http-8080-2] (Suspended (breakpoint at line 32 in UserBean))     
     UserBean.init() line: 32     
     NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]     
     NativeMethodAccessorImpl.invoke(Object, Object[]) line: not available     
     DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: not available     
     Method.invoke(Object, Object...) line: not available     
     DefaultAnnotationProcessor.postConstruct(Object) line: 79     
     Tomcat6InjectionProvider.invokePostConstruct(Object) line: 118     
     ManagedBeanBuilder(BeanBuilder).invokePostConstruct(Object, InjectionProvider) line: 223     
     ManagedBeanBuilder(BeanBuilder).build(InjectionProvider, FacesContext) line: 108     
     BeanManager.createAndPush(String, BeanBuilder, ELUtils$Scope, FacesContext) line: 368     
     BeanManager.create(String, FacesContext) line: 230     
     ManagedBeanELResolver.getValue(ELContext, Object, Object) line: 88     
     FacesCompositeELResolver(CompositeELResolver).getValue(ELContext, Object, Object) line: 53     
     FacesCompositeELResolver.getValue(ELContext, Object, Object) line: 72     
     AstIdentifier.getValue(EvaluationContext) line: 61     
     AstValue.getTarget(EvaluationContext) line: 59     
     AstValue.setValue(EvaluationContext, Object) line: 129     
     ValueExpressionImpl.setValue(ELContext, Object) line: 249     
     JspValueExpression.setValue(ELContext, Object) line: 85     
     RestoreViewPhase.doPerComponentActions(FacesContext, UIComponent) line: 240     
     RestoreViewPhase.doPerComponentActions(FacesContext, UIComponent) line: 245     
     RestoreViewPhase.doPerComponentActions(FacesContext, UIComponent) line: 245     
     RestoreViewPhase.execute(FacesContext) line: 195     
     RestoreViewPhase(Phase).doPhase(FacesContext, Lifecycle, ListIterator<PhaseListener>) line: 100     
     RestoreViewPhase.doPhase(FacesContext, Lifecycle, ListIterator<PhaseListener>) line: 104     
     LifecycleImpl.execute(FacesContext) line: 118     
     FacesServlet.service(ServletRequest, ServletResponse) line: 265