/*
* 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.aop;
import java.util.LinkedList;
import org.smallmind.persistence.orm.ProxySession;
import org.smallmind.persistence.orm.ProxyTransaction;
public class TransactionalState {
private static final ThreadLocal<LinkedList<RollbackAwareBoundarySet<ProxyTransaction>>> TRANSACTION_SET_STACK_LOCAL = new ThreadLocal<>();
public static boolean isInTransaction () {
return isInTransaction(null);
}
public static boolean isInTransaction (String sessionSourceKey) {
return currentTransaction(sessionSourceKey) != null;
}
public static ProxyTransaction currentTransaction (String sessionSourceKey) {
LinkedList<RollbackAwareBoundarySet<ProxyTransaction>> transactionSetStack;
if ((transactionSetStack = TRANSACTION_SET_STACK_LOCAL.get()) != null) {
for (RollbackAwareBoundarySet<ProxyTransaction> transactionSet : transactionSetStack) {
for (ProxyTransaction proxyTransaction : transactionSet) {
if (sessionSourceKey == null) {
if (proxyTransaction.getSession().getSessionSourceKey() == null) {
return proxyTransaction;
}
} else if (sessionSourceKey.equals(proxyTransaction.getSession().getSessionSourceKey())) {
return proxyTransaction;
}
}
}
}
return null;
}
public static boolean withinBoundary (ProxySession proxySession) {
return withinBoundary(proxySession.getSessionSourceKey());
}
public static boolean withinBoundary (String sessionSourceKey) {
LinkedList<RollbackAwareBoundarySet<ProxyTransaction>> transactionSetStack;
if ((transactionSetStack = TRANSACTION_SET_STACK_LOCAL.get()) != null) {
for (RollbackAwareBoundarySet<ProxyTransaction> transactionSet : transactionSetStack) {
if (transactionSet.allows(sessionSourceKey)) {
return true;
}
}
}
return false;
}
public static RollbackAwareBoundarySet<ProxyTransaction> obtainBoundary (ProxySession proxySession) {
LinkedList<RollbackAwareBoundarySet<ProxyTransaction>> transactionSetStack;
if ((transactionSetStack = TRANSACTION_SET_STACK_LOCAL.get()) != null) {
for (RollbackAwareBoundarySet<ProxyTransaction> transactionSet : transactionSetStack) {
if (transactionSet.allows(proxySession)) {
if (NonTransactionalState.containsSession(proxySession)) {
throw new StolenTransactionError("Attempt to steal the session - a non-transactional boundary is already enforced");
}
return transactionSet;
}
}
}
return null;
}
protected static void startBoundary (Transactional transactional) {
LinkedList<RollbackAwareBoundarySet<ProxyTransaction>> transactionSetStack;
if ((transactionSetStack = TRANSACTION_SET_STACK_LOCAL.get()) == null) {
TRANSACTION_SET_STACK_LOCAL.set(transactionSetStack = new LinkedList<>());
}
transactionSetStack.addLast(new RollbackAwareBoundarySet<ProxyTransaction>(transactional.dataSources(), transactional.implicit(), transactional.rollbackOnly()));
}
protected static void commitBoundary ()
throws TransactionError {
commitBoundary(null);
}
protected static void commitBoundary (Throwable throwable)
throws TransactionError {
if ((throwable == null) || (!(throwable instanceof TransactionError)) || ((TRANSACTION_SET_STACK_LOCAL.get() != null) && (TRANSACTION_SET_STACK_LOCAL.get().size() != ((TransactionError)throwable).getClosure()))) {
LinkedList<RollbackAwareBoundarySet<ProxyTransaction>> transactionSetStack;
RollbackAwareBoundarySet<ProxyTransaction> transactionSet;
IncompleteTransactionError incompleteTransactionError = null;
if (((transactionSetStack = TRANSACTION_SET_STACK_LOCAL.get()) == null) || transactionSetStack.isEmpty()) {
throw new TransactionBoundaryError(0, "No transaction boundary has been enforced");
}
try {
for (ProxyTransaction proxyTransaction : transactionSet = transactionSetStack.removeLast()) {
try {
if (transactionSet.isRollbackOnly() || proxyTransaction.isRollbackOnly()) {
proxyTransaction.rollback();
} else {
proxyTransaction.commit();
}
} catch (Throwable unexpectedThrowable) {
if (incompleteTransactionError == null) {
incompleteTransactionError = new IncompleteTransactionError(transactionSetStack.size(), unexpectedThrowable);
}
}
}
if (incompleteTransactionError != null) {
throw incompleteTransactionError;
}
} finally {
if (transactionSetStack.isEmpty()) {
TRANSACTION_SET_STACK_LOCAL.remove();
}
}
} else {
TRANSACTION_SET_STACK_LOCAL.remove();
}
}
protected static void rollbackBoundary (Throwable throwable)
throws TransactionError {
if ((throwable == null) || (!(throwable instanceof TransactionError)) || ((TRANSACTION_SET_STACK_LOCAL.get() != null) && (TRANSACTION_SET_STACK_LOCAL.get().size() != ((TransactionError)throwable).getClosure()))) {
LinkedList<RollbackAwareBoundarySet<ProxyTransaction>> transactionSetStack;
IncompleteTransactionError incompleteTransactionError = null;
if (((transactionSetStack = TRANSACTION_SET_STACK_LOCAL.get()) == null) || transactionSetStack.isEmpty()) {
throw new TransactionBoundaryError(0, throwable, "No transaction boundary has been enforced");
}
try {
for (ProxyTransaction proxyTransaction : transactionSetStack.removeLast()) {
try {
proxyTransaction.rollback();
} catch (Throwable unexpectedThrowable) {
if (incompleteTransactionError == null) {
incompleteTransactionError = new IncompleteTransactionError(transactionSetStack.size(), unexpectedThrowable);
}
}
}
if (incompleteTransactionError != null) {
throw incompleteTransactionError;
}
} finally {
if (transactionSetStack.isEmpty()) {
TRANSACTION_SET_STACK_LOCAL.remove();
}
}
} else {
TRANSACTION_SET_STACK_LOCAL.remove();
}
}
}