/* * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman * * This file is part of the SmallMind Code Project. * * The SmallMind Code Project is free software, you can redistribute * it and/or modify it under either, at your discretion... * * 1) The terms of GNU Affero General Public License as published by the * Free Software Foundation, either version 3 of the License, or (at * your option) any later version. * * ...or... * * 2) The terms of the Apache License, Version 2.0. * * The SmallMind Code Project is distributed in the hope that it will * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License or Apache License for more details. * * You should have received a copy of the GNU Affero General Public License * and the Apache License along with the SmallMind Code Project. If not, see * <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>. * * Additional permission under the GNU Affero GPL version 3 section 7 * ------------------------------------------------------------------ * If you modify this Program, or any covered work, by linking or * combining it with other code, such other code is not for that reason * alone subject to any of the requirements of the GNU Affero GPL * version 3. */ package org.smallmind.persistence.orm; import java.util.Collections; import java.util.LinkedList; import java.util.UUID; public abstract class ProxyTransaction<S extends ProxySession> { private static final ProcessPriorityComparator PROCESS_PRIORITY_COMPARATOR = new ProcessPriorityComparator(); private S proxySession; private LinkedList<TransactionPostProcess> postProcessList; private String uuidAsString; private boolean rollbackOnly = false; public ProxyTransaction (S proxySession) { this.proxySession = proxySession; uuidAsString = UUID.randomUUID().toString(); } public abstract void flush (); public abstract void commit (); public abstract void rollback (); public abstract boolean isCompleted (); public String getUniqueId () { return uuidAsString; } public S getSession () { return proxySession; } public void setRollbackOnly () { rollbackOnly = true; } public boolean isRollbackOnly () { return rollbackOnly; } private LinkedList<TransactionPostProcess> getPostProcessList () { return (postProcessList == null) ? postProcessList = new LinkedList<TransactionPostProcess>() : postProcessList; } public void addPostProcess (TransactionPostProcess postProcess) { getPostProcessList().add(postProcess); } protected void applyPostProcesses (TransactionEndState endState) throws TransactionPostProcessException { TransactionPostProcessException postProcessException = null; Collections.sort(getPostProcessList(), PROCESS_PRIORITY_COMPARATOR); for (TransactionPostProcess postProcess : getPostProcessList()) { if (postProcess.getEndState().equals(TransactionEndState.ANY) || postProcess.getEndState().equals(endState)) { try { postProcess.process(); } catch (Exception exception) { if (postProcessException == null) { postProcessException = new TransactionPostProcessException(exception); } else { postProcessException.addSubsequentCause(exception); } } } } if (postProcessException != null) { throw postProcessException; } } public int hashCode () { return uuidAsString.hashCode(); } public boolean equals (Object obj) { return (obj instanceof ProxyTransaction) && uuidAsString.equals(((ProxyTransaction)obj).getUniqueId()); } }