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/*******************************************************************************
* Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.com>
* This file is part of Gluster Management Gateway.
*
* Gluster Management Gateway is free software; you can redistribute
* it and/or modify it under the terms of the GNU 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 Gateway 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*******************************************************************************/
package org.gluster.storage.management.gateway.tasks;
import org.gluster.storage.management.core.exceptions.ConnectionException;
import org.gluster.storage.management.core.exceptions.GlusterRuntimeException;
import org.gluster.storage.management.core.model.Status;
import org.gluster.storage.management.core.model.TaskStatus;
import org.gluster.storage.management.core.model.TaskInfo.TASK_TYPE;
import org.gluster.storage.management.gateway.services.ClusterService;
import org.gluster.storage.management.gateway.services.GlusterInterfaceService;
import org.gluster.storage.management.gateway.utils.ServerUtil;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.ContextLoader;
import com.sun.jersey.core.util.Base64;
public class RebalanceVolumeTask extends Task {
private String layout;
private String serverName;
private ServerUtil serverUtil;
private GlusterInterfaceService glusterUtil;
public RebalanceVolumeTask(ClusterService clusterService, String clusterName, String volumeName, String layout) {
super(clusterService, clusterName, TASK_TYPE.VOLUME_REBALANCE, volumeName, "Volume " + volumeName
+ " Rebalance", false, true, false);
setLayout(layout);
taskInfo.setName(getId());
init();
}
private void init() {
ApplicationContext ctx = ContextLoader.getCurrentWebApplicationContext();
serverUtil = ctx.getBean(ServerUtil.class);
glusterUtil = ctx.getBean(GlusterInterfaceService.class);
}
@Override
public String getId() {
return new String(Base64.encode(getClusterName() + "-" + taskInfo.getType() + "-" + taskInfo.getReference()));
}
@Override
public void start() {
try {
serverName = getOnlineServer().getName();
startRebalance(serverName);
} catch (Exception e) {
// check if online server has gone offline. If yes, try again one more time.
if (e instanceof ConnectionException || serverUtil.isServerOnline(getOnlineServer()) == false) {
// online server might have gone offline. try with a new one
serverName = getNewOnlineServer().getName();
startRebalance(serverName);
} else {
throw new GlusterRuntimeException(e.getMessage());
}
}
}
private void startRebalance(String serverName) {
String command = "gluster volume rebalance " + getTaskInfo().getReference() + " " + getLayout() + " start";
String output = serverUtil.executeOnServer(serverName, command);
getTaskInfo().setStatus(new TaskStatus(new Status(Status.STATUS_CODE_RUNNING, output)));
}
@Override
public void resume() {
getTaskInfo().setStatus(
new TaskStatus(new Status(Status.STATUS_CODE_FAILURE,
"Pause/Resume is not supported in Volume Rebalance")));
}
@Override
public void stop() {
try {
glusterUtil.stopRebalance(serverName, getTaskInfo().getReference());
} catch (Exception e) {
// check if online server has gone offline. If yes, try again one more time.
if (e instanceof ConnectionException || serverUtil.isServerOnline(getOnlineServer()) == false) {
// online server might have gone offline. update the failure status
getTaskInfo().setStatus(new TaskStatus(new Status(Status.STATUS_CODE_FAILURE, e.getMessage())));
} else {
throw new GlusterRuntimeException(e.getMessage());
}
}
}
@Override
public void pause() {
getTaskInfo().setStatus(
new TaskStatus(new Status(Status.STATUS_CODE_FAILURE,
"Pause/Resume is not supported in Volume Rebalance")));
}
@Override
public TaskStatus checkStatus() {
try {
return glusterUtil.checkRebalanceStatus(serverName, getTaskInfo().getReference());
} catch (Exception e) {
// check if online server has gone offline. If yes, try again one more time.
if (e instanceof ConnectionException || serverUtil.isServerOnline(getOnlineServer()) == false) {
// online server might have gone offline. update the failure status
getTaskInfo().setStatus(new TaskStatus(new Status(Status.STATUS_CODE_FAILURE, e.getMessage())));
return getTaskInfo().getStatus();
} else {
getTaskInfo().setStatus(new TaskStatus(new Status(Status.STATUS_CODE_ERROR, e.getMessage())));
return getTaskInfo().getStatus();
}
}
}
public void setLayout(String layout) {
this.layout = layout;
}
public String getLayout() {
return layout;
}
@Override
public void commit() {
// TODO Auto-generated method stub
}
}
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