/*
* JBoss, a division of Red Hat
* Copyright 2010, Red Hat Middleware, LLC, and individual
* contributors as indicated by the @authors tag. See the
* copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.gatein.exports.impl;
import org.gatein.exports.ExportManager;
import org.gatein.exports.ExportPersistenceManager;
import org.gatein.exports.OperationFailedException;
import org.gatein.exports.OperationNotSupportedException;
import org.gatein.exports.data.ExportContext;
import org.gatein.exports.data.ExportData;
import org.gatein.exports.data.ExportPortletData;
import org.gatein.wsrp.WSRPExceptionFactory;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
/**
* @author <a href="mailto:mwringe@redhat.com">Matt Wringe</a>
* @version $Revision$
*/
public class ExportManagerImpl implements ExportManager
{
protected ExportPersistenceManager exportPersistenceManager;
//set to true if we prefer to export by value instead of by reference
protected boolean preferExportByValue = false;
protected boolean supportExportByValue = true;
public ExportPersistenceManager getPersistenceManager()
{
return exportPersistenceManager;
}
public void setPersistenceManager(ExportPersistenceManager exportPersistenceManager)
{
this.exportPersistenceManager = exportPersistenceManager;
}
public ExportContext createExportContext(boolean exportByValueRequired, long currentTime, long terminationTime, long refreshDuration)
throws UnsupportedEncodingException
{
boolean useExportByValue = false;
if (exportByValueRequired || (exportPersistenceManager == null && preferExportByValue))
{
useExportByValue = true;
}
return new ExportContext(useExportByValue, currentTime, terminationTime, refreshDuration);
}
public boolean supportsExportByValue()
{
return supportExportByValue;
}
public void setPreferExportByValue(boolean preferExportByValue)
{
this.preferExportByValue = preferExportByValue;
}
public ExportContext createExportContext(byte[] bytes) throws OperationFailedException
{
try
{
String type = ExportData.getType(bytes);
double version = ExportData.getVersion(bytes);
if (ExportContext.TYPE.equals(type) && ExportContext.VERSION == version)
{
byte[] internalBytes = ExportData.getInternalBytes(bytes);
return ExportContext.create(internalBytes);
}
else if (exportPersistenceManager != null && exportPersistenceManager.supports(type, version))
{
String refId = exportPersistenceManager.getExportReferenceId(type, version, ExportData.getInternalBytes(bytes));
return exportPersistenceManager.getExportContext(refId);
}
else
{
throw new OperationFailedException("Byte array format not compatible");
}
}
catch (UnsupportedEncodingException e)
{
throw new OperationFailedException("Could not decode the byte array.");
}
catch (IOException e)
{
throw new OperationFailedException("Could not decode the byte array.");
}
}
public ExportPortletData createExportPortletData(ExportContext exportContextData, String portletHandle,
byte[] portletState) throws UnsupportedEncodingException
{
return new ExportPortletData(portletHandle, portletState);
}
public ExportPortletData createExportPortletData(ExportContext exportContextData, long currentTime, long terminationTime, long refreshDuration, byte[] bytes) throws OperationFailedException
{
try
{
String type = ExportData.getType(bytes);
double version = ExportData.getVersion(bytes);
if (ExportPortletData.TYPE.equals(type) && ExportPortletData.VERSION == version)
{
byte[] internalBytes = ExportData.getInternalBytes(bytes);
return ExportPortletData.create(internalBytes);
}
else
{
throw new OperationFailedException("Bytes array format not compatible");
}
}
catch (UnsupportedEncodingException e)
{
throw new OperationFailedException("Could not decode the byte array.");
}
catch (IOException e)
{
throw new OperationFailedException("Could not decode the byte array.");
}
}
public byte[] encodeExportPortletData(ExportContext exportContextData, ExportPortletData exportPortletData) throws IOException
{
if (exportContextData.isExportByValue())
{
return exportPortletData.encodeAsBytes();
}
else
{
String refId = exportPersistenceManager.storeExportPortletData(exportContextData, exportPortletData);
return exportPersistenceManager.encodeExportPortletData(refId);
}
}
public byte[] encodeExportContextData(ExportContext exportContext) throws IOException
{
if (exportContext.isExportByValue())
{
return exportContext.encodeAsBytes();
}
else
{
String refId = exportPersistenceManager.storeExportContext(exportContext);
return exportPersistenceManager.encodeExportContext(refId);
}
}
public ExportContext setExportLifetime(byte[] exportContextBytes, long currentTime, long terminationTime, long refreshDuration) throws OperationNotSupportedException, OperationFailedException
{
if (getPersistenceManager() == null)
{
throw new OperationNotSupportedException("The producer only supports export by value. Cannot call setExportLifetime on this producer");
}
try
{
String type = ExportData.getType(exportContextBytes);
double version = ExportData.getVersion(exportContextBytes);
if (getPersistenceManager().supports(type, version))
{
String refId = getPersistenceManager().getExportReferenceId(type, version, ExportData.getInternalBytes(exportContextBytes));
ExportContext exportContext = getPersistenceManager().getExportContext(refId);
if (exportContext.isExportByValue())
{
throw new OperationFailedException("Cannot set the lifetime for an export that was exported by value.");
}
exportContext.setCurrentTime(currentTime);
exportContext.setTerminationTime(terminationTime);
exportContext.setRefreshDuration(refreshDuration);
ExportContext updatedExportContext = getPersistenceManager().updateExportContext(refId, exportContext);
return updatedExportContext;
}
else
{
throw new OperationFailedException("Byte array format not recognized.");
}
}
catch (IOException e)
{
throw new OperationFailedException("Could not decode the byte array.");
}
}
public void releaseExport(byte[] bytes) throws IOException
{
//TODO: since we can't return any errors, we should at least log messages if this method is called and it can't be completed for some reason.
if (bytes != null && bytes.length > 0 && exportPersistenceManager != null)
{
String type = ExportData.getType(bytes);
double version = ExportData.getVersion(bytes);
if (exportPersistenceManager.supports(type, version))
{
String refId = exportPersistenceManager.getExportReferenceId(type, version, ExportData.getInternalBytes(bytes));
exportPersistenceManager.removeExportContext(refId);
}
}
}
}