UserAdminWrapper.java

   1 package org.argeo.cms.ui.workbench.internal.useradmin;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import javax.transaction.Status;
   7 import javax.transaction.UserTransaction;
   8
   9 import org.argeo.cms.CmsException;
  10 import org.osgi.service.useradmin.UserAdminEvent;
  11 import org.osgi.service.useradmin.UserAdminListener;
  12
  13 /** Centralise interaction with the UserAdmin in this bundle */
  14 public class UserAdminWrapper extends
  15                 org.argeo.cms.util.useradmin.UserAdminWrapper {
  16
  17         // First effort to simplify UX while managing users and groups
  18         public final static boolean COMMIT_ON_SAVE = true;
  19
  20         // Registered listeners
  21         List<UserAdminListener> listeners = new ArrayList<UserAdminListener>();
  22
  23         /**
  24          * Starts a transaction if necessary. Should always been called together
  25          * with {@link UserAdminWrapper#commitOrNotifyTransactionStateChange()} once
  26          * the security model changes have been performed.
  27          */
  28         public UserTransaction beginTransactionIfNeeded() {
  29                 try {
  30                         UserTransaction userTransaction = getUserTransaction();
  31                         if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION) {
  32                                 userTransaction.begin();
  33                                 // UiAdminUtils.notifyTransactionStateChange(userTransaction);
  34                         }
  35                         return userTransaction;
  36                 } catch (Exception e) {
  37                         throw new CmsException("Unable to begin transaction", e);
  38                 }
  39         }
  40
  41         /**
  42          * Depending on the current application configuration, it will either commit
  43          * the current transaction or throw a notification that the transaction
  44          * state has changed (In the later case, it must be called from the UI
  45          * thread).
  46          */
  47         public void commitOrNotifyTransactionStateChange() {
  48                 try {
  49                         UserTransaction userTransaction = getUserTransaction();
  50                         if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  51                                 return;
  52
  53                         if (UserAdminWrapper.COMMIT_ON_SAVE)
  54                                 userTransaction.commit();
  55                         else
  56                                 UiAdminUtils.notifyTransactionStateChange(userTransaction);
  57                 } catch (Exception e) {
  58                         throw new CmsException("Unable to clean transaction", e);
  59                 }
  60         }
  61
  62         // TODO implement safer mechanism
  63         public void addListener(UserAdminListener userAdminListener) {
  64                 if (!listeners.contains(userAdminListener))
  65                         listeners.add(userAdminListener);
  66         }
  67
  68         public void removeListener(UserAdminListener userAdminListener) {
  69                 if (listeners.contains(userAdminListener))
  70                         listeners.remove(userAdminListener);
  71         }
  72
  73         public void notifyListeners(UserAdminEvent event) {
  74                 for (UserAdminListener listener : listeners)
  75                         listener.roleChanged(event);
  76         }
  77 }