/*
* Copyright 2003,2004 Colin Crist
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package hermes.ext;
import hermes.Domain;
import hermes.Hermes;
import hermes.HermesAdmin;
import hermes.HermesException;
import hermes.config.DestinationConfig;
import java.util.Enumeration;
import javax.jms.JMSException;
import javax.jms.QueueBrowser;
import org.apache.log4j.Logger;
/**
* Default implementation that tries to use JMS to implement some of the admin
* functions
*
* @author colincrist@hermesjms.com
* @version $Id: DefaultHermesAdmin.java,v 1.2 2004/07/21 19:46:16 colincrist
* Exp $
*/
public class DefaultHermesAdmin extends HermesAdminSupport implements HermesAdmin
{
private static final Logger log = Logger.getLogger(DefaultHermesAdmin.class);
private boolean sizeDialogShown = false;
private int maxSize = 100;
public DefaultHermesAdmin(Hermes hermes)
{
super(hermes);
}
/*
* (non-Javadoc)
*
* @see hermes.HermesAdmin#getDepth(javax.jms.Destination)
*/
public int getDepth(DestinationConfig dest) throws JMSException
{
if (dest.getDomain() == Domain.QUEUE.getId())
{
final QueueBrowser browser = getHermes().createBrowser(dest);
int depth = 0;
try
{
for (Enumeration iter = browser.getEnumeration(); iter.hasMoreElements();)
{
iter.nextElement();
depth++;
if ( depth > maxSize)
{
throw new HermesException("The default admin provider only implements queue depth functionality up to " + maxSize + " messages");
}
}
}
finally
{
browser.close();
}
return depth;
}
else
{
throw new HermesException("Cannot get the depth of a topic without a plugin.") ;
}
}
/*
* (non-Javadoc)
*
* @see hermes.HermesAdmin#close()
*/
public void close() throws JMSException
{
// NOP
}
}