/*
* Copyright (C) 2012, Katy Hilgenberg.
* Special acknowledgments to: Knowledge & Data Engineering Group, University of Kassel (http://www.kde.cs.uni-kassel.de).
* Contact: sdcf@cs.uni-kassel.de
*
* This file is part of the SDCFramework (Sensor Data Collection Framework) project.
*
* The SDCFramework is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The SDCFramework is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SDCFramework. If not, see <http://www.gnu.org/licenses/>.
*/
package de.unikassel.android.sdcframework.transmission;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.UUID;
import android.content.Context;
import de.unikassel.android.sdcframework.preferences.facade.TransmissionConfiguration;
import de.unikassel.android.sdcframework.preferences.facade.TransmissionProtocolConfiguration;
import de.unikassel.android.sdcframework.transmission.facade.ConnectionStrategy;
import de.unikassel.android.sdcframework.transmission.facade.UpdatableTransmissionComponent;
import de.unikassel.android.sdcframework.transmission.facade.ProtocolStrategy;
import de.unikassel.android.sdcframework.util.FileUtils;
/**
* The manager responsible to handle the file upload to a remote server.
*
* @author Katy Hilgenberg
*
*/
public class UploadManager
implements UpdatableTransmissionComponent<TransmissionConfiguration>
{
/**
* The connection strategy to prepare Internet access via URLConnection
*/
protected ConnectionStrategy connectionStrategy;
/**
* The strategy implementing the protocol
*/
protected ProtocolStrategy protocolStrategy;
/**
* The unique device identifier created by the service
*/
private final UUID uuid;
/**
* Constructor
*
* @param applicationContext
* the application context
* @param config
* the current transmission configuration
* @param uuid
* the unique device identifier created by the service
*/
public UploadManager( Context applicationContext,
TransmissionConfiguration config, UUID uuid )
{
this.uuid = uuid;
updateConfiguration( applicationContext, config );
}
/**
* Getter for the connectionStrategy
*
* @return the connectionStrategy
*/
public synchronized ConnectionStrategy getConnectionStrategy()
{
return connectionStrategy;
}
/**
* Getter for the protocolStrategy
*
* @return the protocolStrategy
*/
public synchronized ProtocolStrategy getProtocolStrategy()
{
return protocolStrategy;
}
/*
* (non-Javadoc)
*
* @see de.unikassel.android.sdcframework.transmission.facade.
* UpdatableTransmissionComponent#updateConfiguration(android.content.Context,
* de
* .unikassel.android.sdcframework.preferences.facade.TransmissionConfiguration
* )
*/
@Override
public synchronized void updateConfiguration( Context context,
TransmissionConfiguration config )
{
connectionStrategy =
ConnectionStrategyBuilder.buildStrategy( config.getProtocolConfiguration() );
protocolStrategy = null;
TransmissionProtocolConfiguration protocolConfiguration = config.getProtocolConfiguration();
try
{
// determine protocol type
URL url = new URL( protocolConfiguration.getURL() );
String protocol = url.getProtocol();
if( "http".equals( protocol ) )
{
// HTTP the only protocol we do support right now
protocolStrategy = new BasicAuthHttpProtocol( context, uuid, protocolConfiguration );
}
}
catch ( MalformedURLException e )
{}
if( protocolStrategy == null )
{
// unknown protocol
protocolStrategy = new UnknownProtocol( context, uuid, protocolConfiguration );
}
}
/**
* Does upload a file to the configured remote server using the given
* authentication data
*
* @param fileName
* the file to upload
* @return true if successful, false otherwise
*/
public synchronized boolean uploadFile( String fileName )
{
File file = FileUtils.fileFromPath( fileName );
if ( file.exists() )
{
protocolStrategy.setFileName( fileName );
if( connectionStrategy.doWork( protocolStrategy ) )
{
return true;
}
protocolStrategy.setFileName( null );
}
return false;
}
}