/*
* Copyright 2000-2008, Atomikos (http://www.atomikos.com)
*
* 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.datasource.xa.jca;
import java.util.Stack;
import javax.resource.spi.ManagedConnection;
import javax.resource.spi.ManagedConnectionFactory;
import javax.transaction.xa.XAResource;
import com.atomikos.datasource.ResourceException;
import com.atomikos.datasource.xa.XATransactionalResource;
import com.atomikos.datasource.xa.XidFactory;
import com.atomikos.diagnostics.Console;
/**
*
*
*
*
*
* A TransactionalResource that works with the JCA architecture.
*
*/
public class JcaTransactionalResource extends XATransactionalResource
{
private ManagedConnectionFactory mcf;
private ManagedConnection connection;
public JcaTransactionalResource ( String servername ,
ManagedConnectionFactory mcf )
{
super ( servername );
this.mcf = mcf;
}
public JcaTransactionalResource ( String servername ,
ManagedConnectionFactory mcf , XidFactory xidFactory )
{
super ( servername , xidFactory );
this.mcf = mcf;
}
public boolean usesXAResource ( XAResource xares )
{
// used for XID creation; return false
// since this task is taken over by a dedicated
// resource. otherwise, deadlock occurs on the
// first enlist of an XAResource that comes
// from a pool limited to size 1!!!
return false;
}
/*
* @see com.atomikos.datasource.xa.XATransactionalResource#refreshXAConnection()
*/
protected XAResource refreshXAConnection () throws ResourceException
{
printMsg ( "refreshXAConnection() for resource: " + getName (),
Console.INFO );
XAResource ret = null;
if ( connection != null ) {
try {
connection.destroy ();
} catch ( Exception normal ) {
// this can be expected, since this method is only called
// if there is a connection problem
}
}
try {
printMsg ( "about to block for new connection...", Console.INFO );
// System.out.println ( "ABOUT TO BLOCK FOR NEW CONNECTION");
connection = mcf.createManagedConnection ( null, null );
} catch ( javax.resource.ResourceException e ) {
// ignore and return null: happens if resource is down
// at this moment
connection = null;
} finally {
// System.out.println ( "BLOCKING DONE");
printMsg ( "blocking done.", Console.INFO );
}
try {
if ( connection != null )
ret = connection.getXAResource ();
} catch ( javax.resource.ResourceException e ) {
printMsg ( "error getting XAResource: " + e.getMessage (),
Console.WARN );
Stack errors = new Stack ();
errors.push ( e );
throw new ResourceException ( "Error in getting XA resource",
errors );
}
printMsg ( "refreshXAConnection() done.", Console.INFO );
// System.out.println ( "DONE REFRESHXACONNECTION FOR RESOURCE: " +
// getName() );
return ret;
}
/**
* Overrides default close to include closing any open connections to the
* source.
*/
public void close () throws ResourceException
{
super.close ();
try {
if ( connection != null )
connection.destroy ();
} catch ( Exception err ) {
// throw new ResourceException ( err.getMessage() );
// exception REMOVED because it close clashes
// with shutdown hooks (in which the order of TS and
// DS shutdown is unpredictable)
}
}
}