org.argeo.security.ui.admin/src/org/argeo/security/ui/admin/internal/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.internal.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.eclipse.ui.handlers.HandlerUtil;
  29 import org.osgi.service.useradmin.UserAdminEvent;
  30
  31 /** Manage the transaction that is bound to the current perspective */
  32 public class UserTransactionHandler extends AbstractHandler {
  33         public final static String ID = SecurityAdminPlugin.PLUGIN_ID
  34                         + ".userTransactionHandler";
  35
  36         public final static String PARAM_COMMAND_ID = "param.commandId";
  37
  38         public final static String TRANSACTION_BEGIN = "transaction.begin";
  39         public final static String TRANSACTION_COMMIT = "transaction.commit";
  40         public final static String TRANSACTION_ROLLBACK = "transaction.rollback";
  41
  42         /* DEPENDENCY INJECTION */
  43         private UserAdminWrapper userAdminWrapper;
  44
  45         public Object execute(ExecutionEvent event) throws ExecutionException {
  46                 String commandId = event.getParameter(PARAM_COMMAND_ID);
  47                 final UserTransaction userTransaction = userAdminWrapper
  48                                 .getUserTransaction();
  49                 try {
  50                         if (TRANSACTION_BEGIN.equals(commandId)) {
  51                                 if (userTransaction.getStatus() != Status.STATUS_NO_TRANSACTION)
  52                                         throw new ArgeoException("A transaction already exists");
  53                                 else
  54                                         userTransaction.begin();
  55                         } else if (TRANSACTION_COMMIT.equals(commandId)) {
  56                                 if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  57                                         throw new ArgeoException("No transaction.");
  58                                 else
  59                                         userTransaction.commit();
  60                         } else if (TRANSACTION_ROLLBACK.equals(commandId)) {
  61                                 if (userTransaction.getStatus() == Status.STATUS_NO_TRANSACTION)
  62                                         throw new ArgeoException("No transaction to rollback.");
  63                                 else {
  64                                         userTransaction.rollback();
  65                                         userAdminWrapper.notifyListeners(new UserAdminEvent(null,
  66                                                         UserAdminEvent.ROLE_CHANGED, null));
  67                                 }
  68                         }
  69
  70                         // Try to remove invalid thread access errors when managing users.
  71                         HandlerUtil.getActivePart(event).getSite().getShell().getDisplay()
  72                                         .asyncExec(new Runnable() {
  73                                                 @Override
  74                                                 public void run() {
  75                                                         UiAdminUtils
  76                                                                         .notifyTransactionStateChange(userTransaction);
  77                                                 }
  78                                         });
  79
  80                 } catch (ArgeoException e) {
  81                         throw e;
  82                 } catch (Exception e) {
  83                         throw new ArgeoException("Unable to call " + commandId + " on "
  84                                         + userTransaction, e);
  85                 }
  86                 return null;
  87         }
  88
  89         /* DEPENDENCY INJECTION */
  90         public void setUserAdminWrapper(UserAdminWrapper userAdminWrapper) {
  91                 this.userAdminWrapper = userAdminWrapper;
  92         }
  93 }