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/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: Lightweight XADataSource
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2011-2016, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by the Apache Software
* Foundation (http://www.apache.org/).
*/
package org.openmdx.kernel.lightweight.sql;
import java.io.PrintWriter;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.Map;
import java.util.Properties;
import java.util.WeakHashMap;
import javax.sql.PooledConnection;
import javax.sql.XAConnection;
import javax.sql.XADataSource;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import org.openmdx.uses.org.apache.commons.pool2.ObjectPool;
import org.openmdx.uses.org.apache.commons.pool2.impl.GenericObjectPool;
/**
* Lightweight XADataSource
*/
final public class LightweightXADataSource
implements XADataSource
{
/**
* Constructor
*
* @param transactionManager the transaction manager to enlist the data source
* @param url a database url of the form jdbc:subprotocol:subname
*/
LightweightXADataSource(
TransactionManager transactionManager,
String url
){
this.transactionManager = transactionManager;
this.transactionalPool = createManagedConnectionPool(url, false);
this.nonTransactionalPool = createManagedConnectionPool(url, true);
}
private final TransactionManager transactionManager;
private final ObjectPool transactionalPool;
private final ObjectPool nonTransactionalPool;
private final Map transactionalConnections = new WeakHashMap();
private static ObjectPool createManagedConnectionPool(
String url,
boolean autoCommit
) {
final String connectionURL;
final Properties connectionProperties = new Properties();
final int q = url.indexOf('?');
if(q < 0) {
connectionURL = url;
} else {
connectionURL = url.substring(0, q);
String[] entries = url.substring(q+1).split("&");
for(String entry : entries) {
int e = entry.indexOf('=');
if(e > 0) {
connectionProperties.put(
entry.substring(0, e),
entry.substring(e+1)
);
}
}
}
final PooledConnectionFactory factory = new PooledConnectionFactory(connectionURL, connectionProperties, autoCommit);
final ObjectPool pool = new GenericObjectPool(factory);
factory.setConnectionEventListener(new PoolableConnectionEventListener(pool));
return pool;
}
/* (non-Javadoc)
* @see javax.sql.XADataSource#getLogWriter(
*/
@Override
public PrintWriter getLogWriter() throws SQLException {
return DriverManager.getLogWriter();
}
/* (non-Javadoc)
* @see javax.sql.XADataSource#getLoginTimeout()
*/
@Override
public int getLoginTimeout() throws SQLException {
return DriverManager.getLoginTimeout();
}
/* (non-Javadoc)
* @see javax.sql.XADataSource#getXAConnection()
*/
@Override
public synchronized XAConnection getXAConnection() throws SQLException {
return getXAConnection(getTransaction());
}
private synchronized XAConnection getXAConnection(
Transaction transaction
) throws SQLException {
XAConnection xaConnection = this.transactionalConnections.get(transaction);
if(xaConnection == null) {
xaConnection = (XAConnection) getPooledConnection(this.transactionalPool);
enlistResource(transaction, xaConnection);
}
return xaConnection;
}
PooledConnection getPooledConnection(
) throws SQLException{
final Transaction transaction = getTransaction();
return transaction == null ?
getPooledConnection(this.nonTransactionalPool) :
getXAConnection(transaction);
}
private ValidatablePooledConnection getPooledConnection (
final ObjectPool objectPool
) throws SQLException {
try {
return objectPool.borrowObject();
} catch (Exception e) {
throw new SQLException("XA connection acquisition failure", e);
}
}
private void enlistResource(
final Transaction transaction,
final XAConnection xaConnection
) throws SQLException {
try {
transaction.enlistResource(xaConnection.getXAResource());
} catch (Exception e) {
throw new SQLException("XA connection enlisting failure", e);
}
this.transactionalConnections.put(transaction, xaConnection);
}
private Transaction getTransaction() throws SQLException {
try {
return this.transactionManager.getTransaction();
} catch (SystemException e) {
throw new SQLException("Transaction acquisition failure", e);
}
}
/* (non-Javadoc)
* @see javax.sql.XADataSource#getXAConnection(java.lang.String, java.lang.String)
*/
@Override
public XAConnection getXAConnection(
String user,
String password
) throws SQLException {
throw new SQLFeatureNotSupportedException("Re-authentication not yet supported");
}
/* (non-Javadoc)
* @see javax.sql.XADataSource#setLogWriter(java.io.PrintWriter)
*/
@Override
public void setLogWriter(PrintWriter out) throws SQLException {
DriverManager.setLogWriter(out);
}
/* (non-Javadoc)
* @see javax.sql.XADataSource#setLoginTimeout(int)
*/
@Override
public void setLoginTimeout(int seconds) throws SQLException {
DriverManager.setLoginTimeout(seconds);
}
//-----------------------------------------------------------------------
// Since JRE 7
//-----------------------------------------------------------------------
public java.util.logging.Logger getParentLogger(
) throws java.sql.SQLFeatureNotSupportedException {
throw new SQLFeatureNotSupportedException("JRE 7 features not yet supported");
}
}
