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/*******************************************************************************
* Copyright (c) 2011 Gluster, Inc. <http://www.gluster.com>
* This file is part of Gluster Management Console.
*
* Gluster Management Console is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Gluster Management Console 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 Affero General Public License
* for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*******************************************************************************/
package org.gluster.storage.management.console.actions;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.gluster.storage.management.client.VolumesClient;
import org.gluster.storage.management.console.GlusterDataModelManager;
import org.gluster.storage.management.console.IImageKeys;
import org.gluster.storage.management.console.utils.GUIHelper;
import org.gluster.storage.management.core.constants.CoreConstants;
import org.gluster.storage.management.core.model.Volume;
import org.gluster.storage.management.core.model.Volume.VOLUME_STATUS;
public class DeleteVolumeAction extends AbstractMonitoredActionDelegate {
private GlusterDataModelManager modelManager = GlusterDataModelManager.getInstance();
private List<Volume> selectedVolumes = new ArrayList<Volume>();
private List<String> selectedVolumeNames = new ArrayList<String>();
private List<String> onlineVolumeNames = new ArrayList<String>();
private List<String> deletedVolumeNames = new ArrayList<String>();
private List<Volume> failedVolumes = new ArrayList<Volume>();
@Override
protected void performAction(final IAction action, IProgressMonitor monitor) {
final String actionDesc = action.getDescription();
collectVolumeNames();
String warningMessage;
List<String> cifsVolumes = GlusterDataModelManager.getInstance().getCifsEnabledVolumeNames(selectedVolumes);
List<String> offlineServers = GlusterDataModelManager.getInstance().getOfflineServers();
// One or more servers are offline, Show warning if cifs is enabled
if (cifsVolumes != null && cifsVolumes.size() > 0 && offlineServers != null && offlineServers.size() > 0) {
Integer userAction = new MessageDialog(getShell(), "CIFS configuration", GUIHelper.getInstance().getImage(
IImageKeys.VOLUME_16x16),
"Performing CIFS updates when one or more servers are offline can trigger "
+ "inconsistent behavior for CIFS accesses in the cluster." + CoreConstants.NEWLINE
+ "Are you sure you want to continue?", MessageDialog.QUESTION,
new String[] { "No", "Yes" }, -1).open();
if (userAction != 1) {
return; // Do not delete volume services
}
}
if (onlineVolumeNames.size() > 0) { // Getting confirmation for stop and delete
warningMessage = "Following volume(s) " + onlineVolumeNames + " are online, " + CoreConstants.NEWLINE
+ "Are you sure to continue?" + CoreConstants.NEWLINE + selectedVolumeNames;
} else {
warningMessage = "Are you sure to delete the volumes " + selectedVolumeNames + " ?";
}
final Integer deleteOption = new MessageDialog(getShell(), "Delete Volume", GUIHelper.getInstance()
.getImage(IImageKeys.VOLUME_16x16), warningMessage, MessageDialog.QUESTION, new String[] { "Cancel",
"Delete volume and data", "Delete volume, keep data" }, -1).open();
if (deleteOption <= 0) { // By Cancel button(0) or Escape key(-1)
return;
}
String errorMessage = deleteVolumes(selectedVolumes, deleteOption, monitor);
// Display the success or failure info
if (deletedVolumeNames.size() == 0) { // No volume(s) deleted successfully
showErrorDialog(actionDesc, "Volume(s) could not be deleted! " + CoreConstants.NEWLINE + errorMessage);
} else {
String info = "Volume(s) " + deletedVolumeNames + " deleted successfully!";
if (!failedVolumes.isEmpty()) {
info += CoreConstants.NEWLINE + CoreConstants.NEWLINE + "Volumes " + failedVolumes
+ " could not be deleted!" + CoreConstants.NEWLINE + errorMessage;
}
if (selectedVolumes.size() == deletedVolumeNames.size()) {
showInfoDialog(actionDesc, info);
} else {
showWarningDialog(actionDesc, info);
}
}
}
private String deleteVolumes(List<Volume> volumes, final Integer deleteOption, IProgressMonitor monitor) {
deletedVolumeNames.clear();
failedVolumes.clear();
VolumesClient vc = new VolumesClient();
boolean confirmDeleteDir = (deleteOption == 1) ? true : false;
String errorMessage = "";
// To calculate the total work we need to sum volumes size + online volumes (because we treat stop and delete as
// separate steps)
List<Volume> onlineVolumes = getOnlineVolumes(volumes);
monitor.beginTask("Deleting Selected Volumes...", volumes.size() + onlineVolumes.size());
// Deletion of a volume results in changes to the model, and ultimately updates the "selectedVolumes" list,
// over which we are iterating, thus resulting in ConcurrentModificationException. To avoid this, we iterate
// over an array obtained from the list.
for (Volume volume : volumes.toArray(new Volume[0])) {
if (volume.getStatus() == VOLUME_STATUS.ONLINE) { // stop if online volume
monitor.setTaskName("Stopping volume [" + volume.getName() + "]");
try {
vc.stopVolume(volume.getName(), false);
} catch (Exception e1) {
// try again with force = true
try {
vc.stopVolume(volume.getName(), true);
} catch(Exception e2) {
// force stop also failed.
// Mark as deletion failed, append error message.
errorMessage += CoreConstants.NEWLINE + "Stop [" + volume.getName() + "] : [" + e2.getMessage()
+ "]";
failedVolumes.add(volume);
// since we are not going to perform delete on this volume,
// mark the deletion task as worked
monitor.worked(1);
// continue to next volume without trying to delete this one
continue;
}
} finally {
// worked for "stop" operation
monitor.worked(1);
}
}
monitor.setTaskName("Deleting volume [" + volume.getName() + "]");
try {
vc.deleteVolume(volume.getName(), confirmDeleteDir);
modelManager.deleteVolume(volume);
deletedVolumeNames.add(volume.getName());
} catch (Exception e) {
// Volume delete succeeded and post delete operation (directory cleanup, CIFS etc) may fail
if (vc.volumeExists(volume.getName())) {
errorMessage += CoreConstants.NEWLINE + "Delete [" + volume.getName() + "] : [" + e.getMessage() + "]";
failedVolumes.add(volume);
} else {
errorMessage += CoreConstants.NEWLINE + "Volume [" + volume.getName()
+ "] deleted, but following error occured: [" + e.getMessage() + "]";
modelManager.deleteVolume(volume);
deletedVolumeNames.add(volume.getName());
}
} finally {
monitor.worked(1);
}
}
monitor.done();
return errorMessage;
}
private List<Volume> getOnlineVolumes(List<Volume> volumes) {
List<Volume> onlineVolumes = new ArrayList<Volume>();
for (Volume volume : volumes) {
if (volume.getStatus() == VOLUME_STATUS.ONLINE) {
onlineVolumes.add(volume);
}
}
return onlineVolumes;
}
private void collectVolumeNames() {
selectedVolumeNames.clear();
onlineVolumeNames.clear();
for (Volume volume : selectedVolumes) {
selectedVolumeNames.add(volume.getName());
if (volume.getStatus() == VOLUME_STATUS.ONLINE) {
onlineVolumeNames.add(volume.getName());
}
}
}
@Override
public void dispose() {
System.out.println("Disposing [" + this.getClass().getSimpleName() + "]");
}
@Override
public void selectionChanged(IAction action, ISelection selection) {
Set<Volume> selectedVolumeSet = GUIHelper.getInstance().getSelectedEntities(getWindow(), Volume.class);
selectedVolumes.clear();
if (selectedVolumeSet == null || selectedVolumeSet.isEmpty()) {
super.selectionChanged(action, selection);
if (selectedEntity instanceof Volume) {
selectedVolumes.add((Volume) selectedEntity);
}
} else {
selectedVolumes.addAll(selectedVolumeSet); //TODO reverse the collection to maintain the selected order
}
action.setEnabled( (selectedVolumes.size() > 0) );
}
}
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