/**
* This file is part of Graylog2.
*
* Graylog2 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.
*
* Graylog2 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 Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.periodical;
import com.google.inject.Inject;
import org.graylog2.cluster.NodeNotFoundException;
import org.graylog2.notifications.Notification;
import org.graylog2.notifications.NotificationService;
import org.graylog2.plugin.periodical.Periodical;
import org.graylog2.plugin.system.NodeId;
import org.graylog2.shared.inputs.InputRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Dennis Oelkers <dennis@torch.sh>
*/
public class ClusterHealthCheckThread extends Periodical {
private static final Logger LOG = LoggerFactory.getLogger(ClusterHealthCheckThread.class);
private NotificationService notificationService;
private final InputRegistry inputRegistry;
private final NodeId nodeId;
@Inject
public ClusterHealthCheckThread(NotificationService notificationService,
InputRegistry inputRegistry,
NodeId nodeId) {
this.notificationService = notificationService;
this.inputRegistry = inputRegistry;
this.nodeId = nodeId;
}
@Override
public void doRun() {
try {
if (inputRegistry.runningCount() == 0) {
LOG.debug("No input running in cluster!");
notificationService.publishIfFirst(getNotification());
} else {
LOG.debug("Running inputs found, disabling notification");
notificationService.fixed(getNotification());
}
} catch (NodeNotFoundException e) {
LOG.error("Unable to find own node: ", e.getMessage(), e);
}
}
@Override
protected Logger getLogger() {
return LOG;
}
protected Notification getNotification() throws NodeNotFoundException {
Notification notification = notificationService.buildNow();
notification.addType(Notification.Type.NO_INPUT_RUNNING);
notification.addSeverity(Notification.Severity.URGENT);
notification.addNode(nodeId.toString());
return notification;
}
@Override
public boolean runsForever() {
return false;
}
@Override
public boolean isDaemon() {
return true;
}
@Override
public boolean stopOnGracefulShutdown() {
return true;
}
@Override
public boolean masterOnly() {
return true;
}
@Override
public boolean startOnThisNode() {
return true;
}
@Override
public int getInitialDelaySeconds() {
return 0;
}
@Override
public int getPeriodSeconds() {
return 20;
}
}