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* distributed with this work for additional information *
* regarding copyright ownership. The ASF licenses this file *
* to you 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 *
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* http://www.apache.org/licenses/LICENSE-2.0 *
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* 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 *
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* specific language governing permissions and limitations *
* under the License. *
****************************************************************/
package org.apache.james.mailrepository.filepair;
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.component.Composable;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.ServiceException;
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;
/**
* @phoenix:block
* @phoenix:service name="org.apache.avalon.cornerstone.services.store.Store"
*
*/
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_componentManager;
protected Context m_context;
public void contextualize( final Context context )
{
m_context = context;
}
public void service( final ServiceManager componentManager )
throws ServiceException
{
m_componentManager = componentManager;
}
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 component )
{
}
public boolean isSelectable( final Object hint )
{
if( hint instanceof Configuration )
return true;
else
return false;
}
public Object select( final Object hint )
throws ServiceException
{
Configuration repConf = null;
try
{
repConf = (Configuration)hint;
}
catch( final ClassCastException cce )
{
throw new ServiceException("", "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("","Malformed configuration has no " +
"destinationURL attribute", ce );
}
catch( final MalformedURLException mue )
{
throw new ServiceException("", "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("", 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_componentManager);
if (reply instanceof Composable) {
final String error = "no implementation in place to support Composable";
getLogger().error( error );
throw new IllegalArgumentException( error );
}
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("", message, e );
}
}
}
catch( final ConfigurationException ce )
{
throw new ServiceException("", "Malformed configuration", ce );
}
}
public static final String getName()
{
return REPOSITORY_NAME;
}
}
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