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.argeo.security.ui.admin.internal.UserAdminWrapper;
  25 import org.eclipse.core.commands.AbstractHandler;
  26 import org.eclipse.core.commands.ExecutionEvent;
  27 import org.eclipse.core.commands.ExecutionException;
  28 import org.osgi.service.useradmin.UserAdminEvent;
  29
  30 /** Manage the transaction that is bound to the current perspective */
  31 public class UserTransactionHandler extends AbstractHandler {
  32         public final static String ID = SecurityAdminPlugin.PLUGIN_ID
  33                         + ".userTransactionHandler";
  34
  35         public final static String PARAM_COMMAND_ID = "param.commandId";
  36
  37         public final static String TRANSACTION_BEGIN = "transaction.begin";
  38         public final static String TRANSACTION_COMMIT = "transaction.commit";
  39         public final static String TRANSACTION_ROLLBACK = "transaction.rollback";
  40
  41         /* DEPENDENCY INJECTION */
  42         private UserAdminWrapper userAdminWrapper;
  43
  44         public Object execute(ExecutionEvent event) throws ExecutionException {
  45                 String commandId = event.getParameter(PARAM_COMMAND_ID);
  46                 UserTransaction userTransaction = userAdminWrapper.getUserTransaction();
  47                 try {
  48                         if (TRANSACTION_BEGIN.equals(commandId)) {
  49                                 if (userTransaction.getStatus() != Status.STATUS_NO_TRANSACTION)
  50                                         throw new ArgeoException("A transaction already exists");
  51                                 else
  52                                         userTransaction.begin();
  53                         } else if (TRANSACTION_COMMIT.equals(commandId)) {
  54                                 if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  55                                         throw new ArgeoException("No transaction.");
  56                                 else
  57                                         userTransaction.commit();
  58                         } else if (TRANSACTION_ROLLBACK.equals(commandId)) {
  59                                 if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  60                                         throw new ArgeoException("No transaction to rollback.");
  61                                 else {
  62                                         userTransaction.rollback();
  63                                         userAdminWrapper.notifyListeners(new UserAdminEvent(null,
  64                                                         UserAdminEvent.ROLE_CHANGED, null));
  65                                 }
  66                         }
  67                         UiAdminUtils.notifyTransactionStateChange(userTransaction);
  68                 } catch (ArgeoException e) {
  69                         throw e;
  70                 } catch (Exception e) {
  71                         throw new ArgeoException("Unable to call " + commandId + " on "
  72                                         + userTransaction, e);
  73                 }
  74                 return null;
  75         }
  76
  77         /* DEPENDENCY INJECTION */
  78         public void setUserAdminWrapper(UserAdminWrapper userAdminWrapper) {
  79                 this.userAdminWrapper = userAdminWrapper;
  80         }
  81 }