org.argeo.security.ui.admin/src/org/argeo/security/ui/admin/commands/UserTransactionHandler.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.security.ui.admin.commands;
  17
  18 import javax.transaction.Status;
  19 import javax.transaction.UserTransaction;
  20
  21 import org.argeo.ArgeoException;
  22 import org.argeo.security.ui.admin.SecurityAdminPlugin;
  23 import org.argeo.security.ui.admin.internal.UiAdminUtils;
  24 import org.eclipse.core.commands.AbstractHandler;
  25 import org.eclipse.core.commands.ExecutionEvent;
  26 import org.eclipse.core.commands.ExecutionException;
  27
  28 /** Manage the transaction that is bound to the current perspective */
  29 public class UserTransactionHandler extends AbstractHandler {
  30         public final static String ID = SecurityAdminPlugin.PLUGIN_ID
  31                         + ".userTransactionHandler";
  32
  33         public final static String PARAM_COMMAND_ID = "param.commandId";
  34
  35         public final static String TRANSACTION_BEGIN = "transaction.begin";
  36         public final static String TRANSACTION_COMMIT = "transaction.commit";
  37         public final static String TRANSACTION_ROLLBACK = "transaction.rollback";
  38
  39         private UserTransaction userTransaction;
  40
  41         public Object execute(ExecutionEvent event) throws ExecutionException {
  42
  43                 String commandId = event.getParameter(PARAM_COMMAND_ID);
  44                 try {
  45                         if (TRANSACTION_BEGIN.equals(commandId)) {
  46                                 if (userTransaction.getStatus() != Status.STATUS_NO_TRANSACTION)
  47                                         throw new ArgeoException("A transaction already exists");
  48                                 else
  49                                         userTransaction.begin();
  50                         } else if (TRANSACTION_COMMIT.equals(commandId)) {
  51                                 if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  52                                         throw new ArgeoException("No transaction.");
  53                                 else
  54                                         userTransaction.commit();
  55                         } else if (TRANSACTION_ROLLBACK.equals(commandId)) {
  56                                 if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  57                                         throw new ArgeoException("No transaction to rollback.");
  58                                 else
  59                                         userTransaction.rollback();
  60                         }
  61                         UiAdminUtils.notifyTransactionStateChange(userTransaction);
  62                 } catch (ArgeoException e) {
  63                         throw e;
  64                 } catch (Exception e) {
  65                         throw new ArgeoException("Unable to call " + commandId + " on "
  66                                         + userTransaction, e);
  67                 }
  68                 //
  69                 // IWorkbenchWindow iww = HandlerUtil.getActiveWorkbenchWindow(event);
  70                 // if (iww == null)
  71                 // return null;
  72                 // IWorkbenchPage activePage = iww.getActivePage();
  73                 // IWorkbenchPart part = activePage.getActivePart();
  74                 // if (part instanceof UsersView)
  75                 // ((UsersView) part).refresh();
  76                 // else if (part instanceof GroupsView)
  77                 // ((GroupsView) part).refresh();
  78                 return null;
  79         }
  80
  81         public void setUserTransaction(UserTransaction userTransaction) {
  82                 this.userTransaction = userTransaction;
  83         }
  84 }