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package org.openslx.runvirt.plugin.qemu.configuration;
import java.util.ArrayList;
import org.openslx.libvirt.domain.Domain;
import org.openslx.libvirt.domain.device.Disk.BusType;
import org.openslx.libvirt.domain.device.Disk.StorageType;
import org.openslx.libvirt.domain.device.DiskFloppy;
import org.openslx.libvirt.domain.device.DiskStorage;
import org.openslx.runvirt.plugin.qemu.cmdln.CommandLineArgs;
import org.openslx.virtualization.configuration.VirtualizationConfigurationQemuUtils;
import org.openslx.virtualization.configuration.transformation.TransformationException;
import org.openslx.virtualization.configuration.transformation.TransformationGeneric;
/**
* Generic storage device (HDD, SSD, ...) transformation for Libvirt/QEMU virtualization
* configurations.
*
* @author Manuel Bentele
* @version 1.0
*/
public class TransformationGenericDiskStorageDevices extends TransformationGeneric<Domain, CommandLineArgs>
{
/**
* Name of the configuration transformation.
*/
private static final String NAME = "Disk storage devices [HDD, SSD, ...]";
/**
* Creates a new storage device (HDD, SSD, ...) transformation for Libvirt/QEMU virtualization
* configurations.
*/
public TransformationGenericDiskStorageDevices()
{
super( TransformationGenericDiskStorageDevices.NAME );
}
/**
* Validates a virtualization configuration and input arguments for this transformation.
*
* @param config virtualization configuration for the validation.
* @param args input arguments for the validation.
* @throws TransformationException validation has failed.
*/
private void validateInputs( Domain config, CommandLineArgs args ) throws TransformationException
{
if ( config == null || args == null ) {
throw new TransformationException( "Virtualization configuration or input arguments are missing!" );
}
}
/**
* Transforms a storage device in a virtualization configuration selected by its {@code index}.
*
* @param config virtualization configuration for the transformation.
* @param fileName name of the image file for the storage device.
* @param index number of the storage device in the virtualization configuration that is
* selected.
* @throws TransformationException transformation has failed.
*/
private void transformDiskStorageDevice( Domain config, String fileName, int index ) throws TransformationException
{
final ArrayList<DiskStorage> devices = config.getDiskStorageDevices();
final DiskStorage disk = VirtualizationConfigurationQemuUtils.getArrayIndex( devices, index );
if ( disk == null ) {
if ( fileName != null && !fileName.isEmpty() ) {
// storage device does not exist, so create new storage device
final DiskFloppy newDisk = config.addDiskFloppyDevice();
newDisk.setBusType( BusType.VIRTIO );
String targetDevName = VirtualizationConfigurationQemuUtils.createAlphabeticalDeviceName( "vd", index );
newDisk.setTargetDevice( targetDevName );
newDisk.setStorage( StorageType.FILE, fileName );
}
} else {
// storage device exists, so update existing storage device
if ( fileName == null || fileName.isEmpty() ) {
// remove disk storage device if disk image file name is not set
disk.remove();
} else {
// set image file of disk storage if disk storage device is available
disk.setStorage( StorageType.FILE, fileName );
}
}
}
@Override
public void transform( Domain config, CommandLineArgs args ) throws TransformationException
{
// validate configuration and input arguments
this.validateInputs( config, args );
// alter storage device
this.transformDiskStorageDevice( config, args.getVmDiskFileNameHDD0(), 0 );
// remove all additional disk storage devices
final ArrayList<DiskStorage> devices = config.getDiskStorageDevices();
for ( int i = 1; i < devices.size(); i++ ) {
devices.get( i ).remove();
}
}
}
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