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/**
* Copyright (C) 2000-2010 Atomikos
*
* This code ("Atomikos TransactionsEssentials"), by itself,
* is being distributed under the
* Apache License, Version 2.0 ("License"), a copy of which may be found at
* http://www.atomikos.com/licenses/apache-license-2.0.txt .
* You may not use this file except in compliance with the License.
*
* While the License grants certain patent license rights,
* those patent license rights only extend to the use of
* Atomikos TransactionsEssentials by itself.
*
* This code (Atomikos TransactionsEssentials) contains certain interfaces
* in package (namespace) com.atomikos.icatch
* (including com.atomikos.icatch.Participant) which, if implemented, may
* infringe one or more patents held by Atomikos.
* It should be appreciated that you may NOT implement such interfaces;
* licensing to implement these interfaces must be obtained separately from Atomikos.
*
* 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.
*/
package com.atomikos.jdbc;
import java.io.PrintWriter;
import java.sql.SQLException;
import javax.sql.XAConnection;
import javax.sql.XADataSource;
import com.atomikos.datasource.TransactionalResource;
import com.atomikos.datasource.xa.XidFactory;
import com.atomikos.datasource.xa.jdbc.JdbcTransactionalResource;
/**
*
*
* A default connection factory for XA connections that work with the Atomikos
* connection pools.
*/
// @todo TEST NEW USER AND PASSWD SETS ON TXRESOURCE!!!
public class XAConnectionFactory implements ConnectionFactory
{
private String userName_;
private String passwd_;
private String resourceName_;
private XADataSource ds_;
private JdbcTransactionalResource res_;
private boolean exclusive_;
// true iff XAResource is Oracle or SQLServer style
// where 2PC must be on same instance as start&end
/**
* Constructor for subclasses with their own transactional resource.
*/
protected XAConnectionFactory ( String resourceName , String userName ,
String passwd , XADataSource xaDataSource ,
JdbcTransactionalResource res )
{
resourceName_ = resourceName;
userName_ = userName;
passwd_ = passwd;
ds_ = xaDataSource;
res_ = res;
// ONLY set the user and password if it is not
// empty; in order to avoid that SimpleDataSourceBeans
// will override user settings of XADataSource!!!
// BUG IN INITIAL 2.0 BETA
if ( userName != null && !userName.equals ( "" ) ) {
res_.setUser ( userName );
res_.setPassword ( passwd );
}
exclusive_ = false;
}
/**
* Creates a new instance with a given resource name, user name and password
* for the XADataSource.
*
* @param resourceName
* The unique resource name for the corresponding
* JdbcTransactionalResource (which will be created
* automatically).
* @param userName
* The user name to use for getting XA connections. Null if no
* authentication is supported by the supplied XADataSource.
* @param passwd
* The password for the user, or null if no authentication is
* supported by the supplied XADataSource.
* @param xaDataSource
* The XADataSource to use.
*/
public XAConnectionFactory ( String resourceName , String userName ,
String passwd , XADataSource xaDataSource )
{
resourceName_ = resourceName;
userName_ = userName;
passwd_ = passwd;
ds_ = xaDataSource;
res_ = new JdbcTransactionalResource ( resourceName, ds_ );
res_.setUser ( userName );
res_.setPassword ( passwd );
exclusive_ = false;
}
/**
* Creates a new instance with a given resource name, user name and password
* for the XADataSource, and a custom XidFactory.
*
* @param resourceName
* The unique resource name for the corresponding
* JdbcTransactionalResource (which will be created
* automatically).
* @param userName
* The user name to use for getting XA connections. Null if no
* authentication is supported by the supplied XADataSource.
* @param passwd
* The password for the user, or null if no authentication is
* supported by the supplied XADataSource.
* @param xaDataSource
* The XADataSource to use.
* @param xidFactory
* The custom XidFactory.
*/
public XAConnectionFactory ( String resourceName , String userName ,
String passwd , XADataSource xaDataSource , XidFactory xidFactory )
{
resourceName_ = resourceName;
userName_ = userName;
passwd_ = passwd;
ds_ = xaDataSource;
res_ = new JdbcTransactionalResource ( resourceName, ds_, xidFactory );
res_.setUser ( userName );
res_.setPassword ( passwd );
exclusive_ = false;
}
/**
* Used by getPooledConnection() to get a connection. If the drivers do not
* support authentication, then an empty string should be returned here.
*
* @return String The user name, or null if not applicable.
*/
protected String getUserName ()
{
return userName_;
}
/**
* Used by getPooledConnection() to get a connection.
*
*
* @return String The password, or null if not applicable.
*/
protected String getPassword ()
{
return passwd_;
}
/**
* This method gets the underlying data source. It is called by
* getPooledConnection() to get connections.
*
* @return XADataSource The data source to get XAConnections from.
*/
public XADataSource getXADataSource ()
{
return ds_;
}
/**
* Sets the connections generated to exclusive for 2PC. This mode is needed
* for certain databases that do not conform to XA entirely.
*
* @param exclusive
* If true, then connections will be kept until after
* commit/rollback, resulting in lower reuse.
*/
public void setExclusive ( boolean exclusive )
{
exclusive_ = exclusive;
}
/**
* Tests if the connections that are generated will be exclusive or not.
*
* @return boolean True iff connections are exclusive.
*/
public boolean isExclusive ()
{
return exclusive_;
}
/**
* Get the transactional resource.
*
* @return TransactionalResource The transactional resource.
*/
public TransactionalResource getTransactionalResource ()
{
return res_;
}
/**
* The main method: gets a new DTPPooledConnection instance.
*
* @return XPooledConnection An instance of DTPPooledConnection for use with
* DTPConnectionPool.
*
* @exception IllegalStateException
* If not initialized.
* @exception SQLException
* On sql errors.
*/
public XPooledConnection getPooledConnection ()
throws IllegalStateException, SQLException
{
XAConnection conn = null;
XPooledConnection ret = null;
if ( getTransactionalResource () == null )
throw new IllegalStateException (
"XAConnectionFactory: no tx resource" );
if ( getUserName () == null || getUserName ().equals ( "" ) ) {
conn = getXADataSource ().getXAConnection ();
} else {
conn = getXADataSource ().getXAConnection ( getUserName (),
getPassword () );
}
if ( !exclusive_ ) {
ret = new ExternalXAPooledConnectionImp ( conn,
getTransactionalResource (), getLogWriter () );
} else {
ret = new ExclusiveExternalXAPooledConnectionImp ( conn,
getTransactionalResource (), getLogWriter () );
}
return ret;
}
public PrintWriter getLogWriter () throws SQLException
{
return getXADataSource ().getLogWriter ();
}
public void setLogWriter ( PrintWriter pw ) throws SQLException
{
getXADataSource ().setLogWriter ( pw );
}
public int getLoginTimeout () throws SQLException
{
return getXADataSource ().getLoginTimeout ();
}
public void setLoginTimeout ( int secs ) throws SQLException
{
getXADataSource ().setLoginTimeout ( secs );
}
}
