/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License, version 2 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 General Public License for more details.
*
*
* Copyright 2006 - 2016 Pentaho Corporation. All rights reserved.
*/
package org.pentaho.reporting.platform.plugin.staging;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.platform.api.engine.IPentahoSession;
import org.pentaho.reporting.engine.classic.core.util.StagingMode;
import org.pentaho.reporting.libraries.base.util.MemoryByteArrayOutputStream;
import org.pentaho.reporting.platform.plugin.TrackingOutputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* Memory staging stream, write content directly into memory.
*
* Created by dima.prokopenko@gmail.com on 2/3/2016.
*/
public class MemStagingHandler extends AbstractStagingHandler {
private static final Log logger = LogFactory.getLog( MemStagingHandler.class );
// visible for testing
TrackingOutputStream memoryTrackingStream;
public MemStagingHandler( final OutputStream outputStream, final IPentahoSession userSession ) throws IOException {
super( outputStream, userSession );
}
@Override
protected void initialize() throws IOException {
logger.trace( "Staging mode set - MEM" );
memoryTrackingStream = new TrackingOutputStream( new MemoryByteArrayOutputStream() );
}
/**
* write from memory source to output stream
* passed in constructor.
*
* @throws IOException
*/
@Override
public void complete() throws IOException {
final MemoryByteArrayOutputStream stream = (MemoryByteArrayOutputStream) memoryTrackingStream.getWrappedStream();
final ByteArrayInputStream inputStream = new ByteArrayInputStream( stream.getRaw() );
IOUtils.copy( inputStream, outputStream );
}
@Override
public void close() {
if ( memoryTrackingStream != null ) {
try {
memoryTrackingStream.close();
} catch ( final IOException e ) {
logger.debug( "Unable to close memory stream? (never happens)" );
}
}
}
@Override public int getWrittenByteCount() {
return memoryTrackingStream.getTrackingSize();
}
@Override
public boolean canSendHeaders() {
return true;
}
@Override
public OutputStream getStagingOutputStream() {
return memoryTrackingStream;
}
@Override
public boolean isFullyBuffered() {
return true;
}
@Override
public StagingMode getStagingMode() {
return StagingMode.MEMORY;
}
}