/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.jdbc;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashSet;
import java.util.Iterator;
import javax.sql.ConnectionEvent;
import javax.sql.ConnectionEventListener;
import javax.sql.StatementEventListener;
import javax.sql.XAConnection;
import javax.transaction.xa.XAResource;
import org.teiid.client.security.InvalidSessionException;
import org.teiid.client.util.ExceptionUtil;
import org.teiid.net.CommunicationException;
import org.teiid.net.ServerConnection;
import org.teiid.net.socket.SingleInstanceCommunicationException;
/**
* Implementation of XAConnection.
*/
public class XAConnectionImpl implements XAConnection{
interface ConnectionSource {
ConnectionImpl createConnection() throws SQLException;
}
private final class CloseInterceptor implements
InvocationHandler {
private ConnectionImpl proxiedConnection;
CloseInterceptor(ConnectionImpl connection) {
this.proxiedConnection = connection;
}
public Object invoke(Object proxy,
Method method,
Object[] args) throws Throwable {
if ("close".equals(method.getName())) { //$NON-NLS-1$
this.proxiedConnection.recycleConnection();
XAConnectionImpl.this.notifyListener(null);
return null;
}
try {
return method.invoke(this.proxiedConnection, args);
} catch (InvocationTargetException e) {
Exception ex = ExceptionUtil.getExceptionOfType(e, InvalidSessionException.class);
if (ex == null) {
ex = ExceptionUtil.getExceptionOfType(e, CommunicationException.class);
if (ex instanceof SingleInstanceCommunicationException) {
ServerConnection sc = proxiedConnection.getServerConnection();
if (!sc.isOpen(ServerConnection.PING_INTERVAL)) {
ex = null;
}
}
}
if (ex != null) {
SQLException se = null;
if (e.getCause() instanceof SQLException) {
se = (SQLException)e.getCause();
} else {
se = TeiidSQLException.create(e.getCause());
}
notifyListener(se);
}
throw e.getTargetException();
}
}
}
private HashSet listeners;
private XAResource resource;
private ConnectionImpl connection;
private ConnectionSource cs;
private boolean isClosed;
public static XAConnectionImpl newInstance (ConnectionSource cs){
return new XAConnectionImpl(cs);
}
public XAConnectionImpl(ConnectionSource cs){
this.cs = cs;
}
public Connection getConnection() throws SQLException{
ConnectionImpl conn = getConnectionImpl();
Connection result = (Connection)Proxy.newProxyInstance(this.getClass().getClassLoader(), new Class[] {Connection.class}, new CloseInterceptor(conn));
return result;
}
ConnectionImpl getConnectionImpl() throws SQLException {
if(isClosed){
throw new SQLException(JDBCPlugin.Util.getString("MMXAConnection.connection_is_closed")); //$NON-NLS-1$
}
if(connection == null){
try{
connection = cs.createConnection();
}catch(SQLException e){
notifyListener(e);
throw e;
}
}
return connection;
}
public synchronized void addConnectionEventListener(ConnectionEventListener listener){
if(listeners == null){
listeners = new HashSet();
}
this.listeners.add(listener);
}
public synchronized void removeConnectionEventListener(ConnectionEventListener listener){
if(listeners == null){
return;
}
this.listeners.remove(listener);
}
public XAResource getXAResource() throws SQLException{
if(resource == null){
resource = XAResourceImpl.newInstance(this);
}
return resource;
}
public void close()throws SQLException{
if(connection != null && !connection.isClosed()){
connection.close();
}
isClosed = true;
}
/**
* Notify listeners, if there is any, about the connection status.
* If e is null, the connection is properly closed.
* @param e
*/
protected synchronized void notifyListener(SQLException e){
if(listeners != null && !listeners.isEmpty()){
Iterator iter = listeners.iterator();
while(iter.hasNext()){
ConnectionEventListener listener = (ConnectionEventListener)iter.next();
if(e == null){
//no exception
listener.connectionClosed(new ConnectionEvent(this));
}else{
//exception occurred
listener.connectionErrorOccurred(new ConnectionEvent(this, e));
}
}
}
}
public void addStatementEventListener(StatementEventListener arg0) {
}
public void removeStatementEventListener(StatementEventListener arg0) {
}
}