/*
* 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.Collections;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.sql.ConnectionEvent;
import javax.sql.ConnectionEventListener;
import javax.sql.StatementEventListener;
import javax.sql.XAConnection;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;
import org.teiid.client.security.InvalidSessionException;
import org.teiid.client.util.ExceptionUtil;
import org.teiid.client.xa.XATransactionException;
import org.teiid.client.xa.XidImpl;
import org.teiid.net.CommunicationException;
import org.teiid.net.ServerConnection;
import org.teiid.net.socket.SingleInstanceCommunicationException;
/**
* Implementation of XAConnection.
*/
public class XAConnectionImpl implements XAConnection, XAResource {
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())) { //$NON-NLS-1$
close();
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();
}
}
void close() {
this.proxiedConnection.recycleConnection(loadBalance);
XAConnectionImpl.this.notifyListener(null);
}
}
private static Logger logger = Logger.getLogger("org.teiid.jdbc"); //$NON-NLS-1$
private int timeOut;
private Set<ConnectionEventListener> listeners;
private ConnectionImpl connection;
private CloseInterceptor handler;
private boolean isClosed;
private boolean loadBalance = true;
public XAConnectionImpl(ConnectionImpl conn){
this.connection = conn;
}
public void setLoadBalance(boolean loadBalance) {
this.loadBalance = loadBalance;
}
public Connection getConnection() throws SQLException{
ConnectionImpl conn = getConnectionImpl();
if (handler != null) {
handler.close();
}
handler = new CloseInterceptor(conn);
Connection result = (Connection)Proxy.newProxyInstance(this.getClass().getClassLoader(), new Class[] {Connection.class}, handler);
return result;
}
ConnectionImpl getConnectionImpl() throws SQLException {
if(isClosed){
throw new SQLException(JDBCPlugin.Util.getString("MMXAConnection.connection_is_closed")); //$NON-NLS-1$
}
return connection;
}
public synchronized void addConnectionEventListener(ConnectionEventListener listener){
if(listeners == null){
listeners = Collections.newSetFromMap(new IdentityHashMap<ConnectionEventListener, Boolean>());
}
this.listeners.add(listener);
}
public synchronized void removeConnectionEventListener(ConnectionEventListener listener){
if(listeners == null){
return;
}
this.listeners.remove(listener);
}
public XAResource getXAResource() throws SQLException{
return this;
}
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<ConnectionEventListener> iter = listeners.iterator();
while(iter.hasNext()){
ConnectionEventListener listener = 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) {
}
public void commit(Xid xid, boolean onePhase) throws XAException {
XidImpl mmXid = getMMXid(xid);
try{
getMMConnection().commitTransaction(mmXid, onePhase);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedCommitTXN", xid, onePhase ? "true":"false"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
throw handleError(e, logMsg);
}
}
private XAException handleError(Exception e,String logMsg) {
logger.log(Level.FINE, logMsg, e);
if(e instanceof TeiidSQLException){
Throwable ex = ((TeiidSQLException)e).getCause();
if(ex instanceof XAException){
return (XAException)ex;
}
if (ex instanceof XATransactionException) {
return ((XATransactionException)ex).getXAException();
}
}
return new XAException(XAException.XAER_RMERR);
}
/**
* @see javax.transaction.xa.XAResource#end(javax.transaction.xa.Xid, int)
*/
public void end(Xid xid, int flag) throws XAException {
XidImpl mmXid = getMMXid(xid);
try{
getMMConnection().endTransaction(mmXid, flag);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedEndTXN", xid, new Integer(flag)); //$NON-NLS-1$
throw handleError(e, logMsg);
}
}
/**
* @see javax.transaction.xa.XAResource#forget(javax.transaction.xa.Xid)
*/
public void forget(Xid xid) throws XAException {
XidImpl mmXid = getMMXid(xid);
try{
getMMConnection().forgetTransaction(mmXid);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedForgetTXN", xid); //$NON-NLS-1$
throw handleError(e, logMsg);
}
}
public int getTransactionTimeout() throws XAException {
return timeOut;
}
public boolean isSameRM(XAResource arg0) throws XAException {
if (arg0 == this) {
return true;
}
if (!(arg0 instanceof XAConnectionImpl)) {
return false;
}
XAConnectionImpl other = (XAConnectionImpl)arg0;
try {
return this.getMMConnection().isSameProcess(other.getMMConnection());
} catch (CommunicationException e) {
throw handleError(e, JDBCPlugin.Util.getString("MMXAResource.FailedISSameRM")); //$NON-NLS-1$
}
}
public int prepare(Xid xid) throws XAException {
XidImpl mmXid = getMMXid(xid);
try{
return getMMConnection().prepareTransaction(mmXid);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedPrepareTXN", xid); //$NON-NLS-1$
throw handleError(e, logMsg);
}
}
/**
* @see javax.transaction.xa.XAResource#recover(int)
*/
public Xid[] recover(int flag) throws XAException {
try{
return getMMConnection().recoverTransaction(flag);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedRecoverTXN", flag); //$NON-NLS-1$
throw handleError(e, logMsg);
}
}
public void rollback(Xid xid) throws XAException {
XidImpl mmXid = getMMXid(xid);
try{
getMMConnection().rollbackTransaction(mmXid);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedRollbackTXN", xid); //$NON-NLS-1$
throw handleError(e, logMsg);
}
}
public boolean setTransactionTimeout(int seconds) throws XAException {
timeOut = seconds;
return true;
}
public void start(Xid xid, int flag) throws XAException {
XidImpl mmXid = getMMXid(xid);
try{
getMMConnection().startTransaction(mmXid, flag, timeOut);
}catch(SQLException e){
String logMsg = JDBCPlugin.Util.getString("MMXAResource.FailedStartTXN", xid, new Integer(flag)); //$NON-NLS-1$
handleError(e, logMsg);
}
}
private ConnectionImpl getMMConnection() throws XAException{
try{
return this.getConnectionImpl();
}catch(SQLException e){
throw new XAException(XAException.XAER_RMFAIL);
}
}
/**
* @param xid
* @return
* @throws XAException
*/
private XidImpl getMMXid(Xid originalXid) {
return new XidImpl(originalXid);
}
}