/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Jakarta", "Apache Avalon", "Avalon Components", "Avalon
Framework" and "Apache Software Foundation" must not be used to endorse
or promote products derived from this software without prior written
permission. For written permission, please contact apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation. For more information on the
Apache Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.avalon.cornerstone.blocks.masterstore;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import org.apache.avalon.cornerstone.services.store.Repository;
import org.apache.avalon.cornerstone.services.store.Store;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.container.ContainerUtil;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.Serviceable;
/**
* @author <a href="mailto:fede@apache.org">Federico Barbieri</a>
*/
public class RepositoryManager
extends AbstractLogEnabled
implements Store, Contextualizable, Serviceable, Configurable
{
private static final String REPOSITORY_NAME = "Repository";
private static long id = 0;
protected HashMap m_repositories = new HashMap();
protected HashMap m_models = new HashMap();
protected HashMap m_classes = new HashMap();
protected ServiceManager m_serviceManager;
protected Context m_context;
public void contextualize( final Context context )
{
m_context = context;
}
public void service( final ServiceManager serviceManager )
throws ServiceException
{
m_serviceManager = serviceManager;
}
public void configure( final Configuration configuration )
throws ConfigurationException
{
final Configuration[] registeredClasses =
configuration.getChild( "repositories" ).getChildren( "repository" );
for( int i = 0; i < registeredClasses.length; i++ )
{
registerRepository( registeredClasses[ i ] );
}
}
public void registerRepository( final Configuration repConf )
throws ConfigurationException
{
final String className = repConf.getAttribute( "class" );
getLogger().info( "Registering Repository " + className );
final Configuration[] protocols =
repConf.getChild( "protocols" ).getChildren( "protocol" );
final Configuration[] types = repConf.getChild( "types" ).getChildren( "type" );
final Configuration[] modelIterator =
repConf.getChild( "models" ).getChildren( "model" );
for( int i = 0; i < protocols.length; i++ )
{
final String protocol = protocols[ i ].getValue();
for( int j = 0; j < types.length; j++ )
{
final String type = types[ j ].getValue();
for( int k = 0; k < modelIterator.length; k++ )
{
final String model = modelIterator[ k ].getValue();
m_classes.put( protocol + type + model, className );
getLogger().info( " for " + protocol + "," + type + "," + model );
}
}
}
}
public void release( final Object service )
{
}
public boolean isSelectable( final Object policy )
{
return ( policy instanceof Configuration );
}
public Object select( final Object policy )
throws ServiceException
{
Configuration repConf = null;
try
{
repConf = (Configuration)policy;
}
catch( final ClassCastException cce )
{
throw new ServiceException( policy.toString(), "Hint is of the wrong type. " +
"Must be a Configuration", cce );
}
URL destination = null;
try
{
destination = new URL( repConf.getAttribute( "destinationURL" ) );
}
catch( final ConfigurationException ce )
{
throw new ServiceException( policy.toString(), "Malformed configuration has no " +
"destinationURL attribute", ce );
}
catch( final MalformedURLException mue )
{
throw new ServiceException( policy.toString(), "destination is malformed. " +
"Must be a valid URL", mue );
}
try
{
final String type = repConf.getAttribute( "type" );
final String repID = destination + type;
Repository reply = (Repository)m_repositories.get( repID );
final String model = (String)repConf.getAttribute( "model" );
if( null != reply )
{
if( m_models.get( repID ).equals( model ) )
{
return reply;
}
else
{
final String message = "There is already another repository with the " +
"same destination and type but with different model";
throw new ServiceException( policy.toString(), message );
}
}
else
{
final String protocol = destination.getProtocol();
final String repClass = (String)m_classes.get( protocol + type + model );
getLogger().debug( "Need instance of " + repClass + " to handle: " +
protocol + type + model );
try
{
reply = (Repository)Class.forName( repClass ).newInstance();
setupLogger( reply, "repository" );
ContainerUtil.contextualize( reply, m_context );
ContainerUtil.service( reply, m_serviceManager );
ContainerUtil.configure( reply, repConf );
ContainerUtil.initialize( reply );
m_repositories.put( repID, reply );
m_models.put( repID, model );
getLogger().info( "New instance of " + repClass + " created for " +
destination );
return reply;
}
catch( final Exception e )
{
final String message = "Cannot find or init repository: " + e.getMessage();
getLogger().warn( message, e );
throw new ServiceException( policy.toString(), message, e );
}
}
}
catch( final ConfigurationException ce )
{
throw new ServiceException( policy.toString(), "Malformed configuration", ce );
}
}
public static final String getName()
{
return REPOSITORY_NAME + id++;
}
}