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Cayenne Object Persistence Framework
/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
****************************************************************/
package org.apache.cayenne.access;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Iterator;
import org.apache.cayenne.CayenneException;
/**
* Represents a container-managed transaction.
*
* @since 1.2 moved to a top-level class.
* @author Andrus Adamchik
*/
class ExternalTransaction extends Transaction {
ExternalTransaction() {
}
ExternalTransaction(TransactionDelegate delegate) {
setDelegate(delegate);
}
public synchronized void begin() {
if (status != Transaction.STATUS_NO_TRANSACTION) {
throw new IllegalStateException(
"Transaction must have 'STATUS_NO_TRANSACTION' to begin. "
+ "Current status: "
+ Transaction.decodeStatus(status));
}
status = Transaction.STATUS_ACTIVE;
}
public boolean addConnection(String name, Connection connection) throws SQLException {
if (super.addConnection(name, connection)) {
// implicitly begin transaction
if (status == Transaction.STATUS_NO_TRANSACTION) {
begin();
}
if (status != Transaction.STATUS_ACTIVE) {
throw new IllegalStateException(
"Transaction must have 'STATUS_ACTIVE' to add a connection. "
+ "Current status: "
+ Transaction.decodeStatus(status));
}
fixConnectionState(connection);
return true;
}
else {
return false;
}
}
public void commit() throws IllegalStateException, SQLException, CayenneException {
try {
if (status == Transaction.STATUS_NO_TRANSACTION) {
return;
}
if (delegate != null && !delegate.willCommit(this)) {
return;
}
if (status != Transaction.STATUS_ACTIVE) {
throw new IllegalStateException(
"Transaction must have 'STATUS_ACTIVE' to be committed. "
+ "Current status: "
+ Transaction.decodeStatus(status));
}
processCommit();
status = Transaction.STATUS_COMMITTED;
if (delegate != null) {
delegate.didCommit(this);
}
}
finally {
close();
}
}
public void rollback() throws IllegalStateException, SQLException, CayenneException {
try {
if (status == Transaction.STATUS_NO_TRANSACTION
|| status == Transaction.STATUS_ROLLEDBACK
|| status == Transaction.STATUS_ROLLING_BACK) {
return;
}
if (delegate != null && !delegate.willRollback(this)) {
return;
}
if (status != Transaction.STATUS_ACTIVE
&& status != Transaction.STATUS_MARKED_ROLLEDBACK) {
throw new IllegalStateException(
"Transaction must have 'STATUS_ACTIVE' or 'STATUS_MARKED_ROLLEDBACK' to be rolled back. "
+ "Current status: "
+ Transaction.decodeStatus(status));
}
processRollback();
status = Transaction.STATUS_ROLLEDBACK;
if (delegate != null) {
delegate.didRollback(this);
}
}
finally {
close();
}
}
void fixConnectionState(Connection connection) throws SQLException {
// NOOP
}
void processCommit() throws SQLException, CayenneException {
QueryLogger
.logCommitTransaction("no commit - transaction controlled externally.");
}
void processRollback() throws SQLException, CayenneException {
QueryLogger
.logRollbackTransaction("no rollback - transaction controlled externally.");
}
/**
* Closes all connections associated with transaction.
*/
void close() {
if (connections == null || connections.isEmpty()) {
return;
}
Iterator it = connections.values().iterator();
while (it.hasNext()) {
try {
((Connection) it.next()).close();
}
catch (Throwable th) {
// TODO: chain exceptions...
// ignore for now
}
}
}
}
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