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package org.openslx.runvirt.viewer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.openslx.runvirt.virtualization.LibvirtHypervisor;
import org.openslx.runvirt.virtualization.LibvirtHypervisorException;
import org.openslx.runvirt.virtualization.LibvirtVirtualMachine;
import org.openslx.virtualization.Version;
/**
* Virtual Viewer (virt-viewer) to view one or several displays of a virtual machine.
*
* @author Manuel Bentele
* @version 1.0
*/
public class ViewerVirtViewer extends Viewer
{
/**
* Name of the Virtual Machine Manager program.
*/
private final static String NAME = "virt-viewer";
/**
* Maximum number of supported displays by the Virtual Viewer.
*/
private final static int NUM_SUPPORTED_DISPLAYS = Integer.MAX_VALUE;
/**
* Creates a new Virtual Viewer for a Libvirt virtual machine running on a Libvirt hypervisor.
*
* @param machine virtual machine to display.
* @param hypervisor remote (hypervisor) endpoint for the viewer to connect to.
*/
public ViewerVirtViewer( LibvirtVirtualMachine machine, LibvirtHypervisor hypervisor )
{
super( ViewerVirtViewer.NAME, ViewerVirtViewer.NUM_SUPPORTED_DISPLAYS, machine, hypervisor );
}
@Override
public Version getVersion() throws ViewerException
{
final Version version;
// execute viewer process with arguments:
// "virt-viewer --version"
final String versionOutput = ViewerUtils.executeViewer( ViewerVirtViewer.NAME,
new String[] { "--version" } );
if ( versionOutput == null ) {
version = null;
} else {
// parse version from the viewer's process output
final Pattern viewerVersionPattern = Pattern.compile( "(\\d+).(\\d+)" );
final Matcher viewerVersionMatcher = viewerVersionPattern.matcher( versionOutput );
// check if version pattern was found
if ( viewerVersionMatcher.find() ) {
final short major = Short.valueOf( viewerVersionMatcher.group( 1 ) );
final short minor = Short.valueOf( viewerVersionMatcher.group( 2 ) );
version = new Version( major, minor );
} else {
version = null;
}
}
return version;
}
@Override
public void render() throws ViewerException
{
String connectionUri = null;
String machineUuid = null;
// get URI of the hypervisor connection and UUID of the machine
try {
connectionUri = this.getHypervisor().getConnectionUri();
machineUuid = this.getMachine().getConfiguration().getUuid();
} catch ( LibvirtHypervisorException e ) {
throw new ViewerException(
"Failed to retrieve the URI of the hypervisor backend or the UUID of the machine to display: "
+ e.getLocalizedMessage() );
}
// check if URI of the hypervisor connection and UUID of the machine is specified, otherwise abort
if ( connectionUri == null || connectionUri.isEmpty() || machineUuid == null || machineUuid.isEmpty() ) {
throw new ViewerException(
"The URI of the hypervisor backend or the UUID of the machine to display is missing!" );
}
// execute viewer process with arguments:
// "virt-viewer --full-screen --wait --attach --connect=<URI> --domain-name -- <DOMAIN-UUID>"
ViewerUtils.executeViewer( ViewerVirtViewer.NAME, new String[] { "--full-screen", "--wait",
"--attach", "--connect=" + connectionUri, "--uuid", "--", machineUuid } );
}
}
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