/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, 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 "Apache", "Jakarta", "JAMES" 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 (INCLUDING, 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/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.james.mailrepository.filepair;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import org.apache.avalon.cornerstone.services.store.ObjectRepository;
import org.apache.avalon.excalibur.io.ClassLoaderObjectInputStream;
/**
* This is a simple implementation of persistent object store using
* object serialization on the file system.
*
* @author <a href="mailto:stefano@apache.org">Stefano Mazzocchi</a>
* @author <a href="mailto:fede@apache.org">Federico Barbieri</a>
* @author <a href="mailto:paul_hammant@yahoo.com">Paul Hammant</a>
*/
public class File_Persistent_Object_Repository
extends AbstractFileRepository
implements ObjectRepository
{
protected String getExtensionDecorator()
{
return ".FileObjectStore";
}
/**
* Get the object associated to the given unique key.
*/
public synchronized Object get( final String key )
{
try
{
final InputStream inputStream = getInputStream( key );
if( inputStream == null )
throw new NullPointerException("Null input stream returned for key: " + key );
try
{
final ObjectInputStream stream = new ObjectInputStream( inputStream );
if( stream == null )
throw new NullPointerException("Null stream returned for key: " + key );
final Object object = stream.readObject();
if( DEBUG )
{
getLogger().debug( "returning object " + object + " for key " + key );
}
return object;
}
finally
{
inputStream.close();
}
}
catch( final Throwable e )
{
throw new RuntimeException(
"Exception caught while retrieving an object, cause: " + e.toString() );
}
}
public synchronized Object get( final String key, final ClassLoader classLoader )
{
try
{
final InputStream inputStream = getInputStream( key );
if( inputStream == null )
throw new NullPointerException("Null input stream returned for key: " + key );
try
{
final ObjectInputStream stream = new ClassLoaderObjectInputStream( classLoader, inputStream );
if( stream == null )
throw new NullPointerException("Null stream returned for key: " + key );
final Object object = stream.readObject();
if( DEBUG )
{
getLogger().debug( "returning object " + object + " for key " + key );
}
return object;
}
finally
{
inputStream.close();
}
}
catch( final Throwable e )
{
throw new RuntimeException( "Exception caught while retrieving an object: " + e );
}
}
/**
* Store the given object and associates it to the given key
*/
public synchronized void put( final String key, final Object value )
{
try
{
final OutputStream outputStream = getOutputStream( key );
try
{
final ObjectOutputStream stream = new ObjectOutputStream( outputStream );
stream.writeObject( value );
if( DEBUG ) getLogger().debug( "storing object " + value + " for key " + key );
}
finally
{
outputStream.close();
}
}
catch( final Exception e )
{
throw new RuntimeException( "Exception caught while storing an object: " + e );
}
}
}