| /* |
| * Copyright (c) 2008, 2009, 2011, 2012, 2015 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util.transaction; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class Transaction<CONTEXT> implements ITransaction<CONTEXT> |
| { |
| private List<ITransactionalOperation<CONTEXT>> operations = new ArrayList<ITransactionalOperation<CONTEXT>>(); |
| |
| private CONTEXT context; |
| |
| private boolean undoPhase1OnRollback; |
| |
| public Transaction(CONTEXT context, boolean undoPhase1OnRollback) |
| { |
| this.context = context; |
| this.undoPhase1OnRollback = undoPhase1OnRollback; |
| } |
| |
| public Transaction(CONTEXT context) |
| { |
| this(context, true); |
| } |
| |
| public boolean isUndoPhase1OnRollback() |
| { |
| return undoPhase1OnRollback; |
| } |
| |
| public boolean isActive() |
| { |
| return operations != null; |
| } |
| |
| public CONTEXT getContext() |
| { |
| return context; |
| } |
| |
| public void execute(ITransactionalOperation<CONTEXT> operation) throws TransactionException |
| { |
| if (!isActive()) |
| { |
| throw new TransactionException("Transaction inactive"); //$NON-NLS-1$ |
| } |
| |
| try |
| { |
| operation.phase1(context); |
| operations.add(operation); |
| } |
| catch (RuntimeException ex) |
| { |
| rollback(); |
| throw ex; |
| } |
| catch (Exception ex) |
| { |
| rollback(); |
| throw new TransactionException(ex); |
| } |
| } |
| |
| public void commit() |
| { |
| for (ITransactionalOperation<CONTEXT> operation : end()) |
| { |
| operation.phase2(context); |
| } |
| } |
| |
| public void rollback() |
| { |
| if (undoPhase1OnRollback) |
| { |
| for (ITransactionalOperation<CONTEXT> operation : end()) |
| { |
| operation.undoPhase1(context); |
| } |
| } |
| } |
| |
| private List<ITransactionalOperation<CONTEXT>> end() |
| { |
| List<ITransactionalOperation<CONTEXT>> tmp = operations; |
| operations = null; |
| return tmp; |
| } |
| } |