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package org.openslx.imagemaster.serverconnection;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import org.apache.log4j.Logger;
import org.openslx.imagemaster.Globals;
import org.openslx.imagemaster.crcchecker.CrcChecker;
/**
* Class to schedule CRC checks.
* CRC checks of uploading images are so done parallel to the connection.
*/
public class CrcScheduler extends TimerTask
{
private static Logger log = Logger.getLogger( CrcScheduler.class );
@Override
public void run()
{
List<UploadingImage> list = ImageProcessor.getImagesToCheck();
if ( list == null || list.isEmpty() )
return;
log.debug( "Starting checks: " + list );
Iterator<UploadingImage> iter = list.iterator();
// iterate over the uploading images that need to be checked
while ( iter.hasNext() ) {
UploadingImage image = iter.next();
log.debug( "Checking blocks of " + image.getUuid() );
CrcChecker crcChecker = new CrcChecker( image.getImageFile(), image.getCrcFile() );
log.debug( "CRCFile is valid: " + crcChecker.hasValidCrcFile() );
if ( !crcChecker.hasValidCrcFile() ) {
image.setCrcFile( null ); // set crc file to null, so that the image processor will try to write it again.
crcChecker.done();
continue;
}
for ( int block = 0; block < image.getNumberOfBlocks(); block++ ) {
if ( image.needsCheck( block ) ) {
try {
if ( crcChecker.checkBlock( block ) ) {
image.setValid( block );
log.debug( block + " was valid" );
} else {
image.setNeedsRequest( block );
log.debug( block + " was NOT valid" );
}
} catch ( IOException e ) {
if ( e.getMessage().equalsIgnoreCase( "crc" ) ) {
image.setCrcFile( null ); // set crc file to null, so that the imageprocessor will try to write it again.
image.updateDb();
crcChecker.done();
break;
} else {
// could not read image file
log.error( "Could not read from image file on disk. Pleas contact the server administrator. Image: '" + image.getImageFile().toString() + "'" );
}
}
}
}
image.updateDb(); // writes valid blocks to database
crcChecker.done(); // closes image file
}
log.debug( "... done" );
}
public static void startScheduling()
{
Timer timer = new Timer( "CRCScheduler" );
// start now and fire every 60 s
timer.schedule( new CrcScheduler(), 0, Globals.getCrcSchedulingInterval() * 1000L );
}
}
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