/*
* Copyright 1999-2004 The Apache Software Foundation
* 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 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>
* @avalon.component name="repository-manager" lifestyle="singleton"
* @avalon.service type="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_serviceManager;
protected Context m_context;
/**
* @avalon.entry key="urn:avalon:name" alias="block.name"
* @avalon.entry key="urn:avalon:partition" alias="app.name"
* @avalon.entry key="urn:avalon:home" type="java.io.File" alias="app.home"
*/
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++;
}
}