/**
* 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.shared.initializers;
import com.google.common.base.Stopwatch;
import com.google.common.util.concurrent.AbstractIdleService;
import com.google.inject.Inject;
import org.graylog2.periodical.Periodicals;
import org.graylog2.plugin.periodical.Periodical;
import org.graylog2.plugin.ServerStatus;
import org.graylog2.shared.bindings.InstantiationService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Singleton;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
/**
* @author Dennis Oelkers <dennis@torch.sh>
*/
@Singleton
public class PeriodicalsService extends AbstractIdleService {
private static final Logger LOG = LoggerFactory.getLogger(PeriodicalsService.class);
public static final String NAME = "Periodicals initializer";
private final InstantiationService instantiationService;
private final Periodicals periodicals;
private final ServerStatus serverStatus;
private final Set<Periodical> periodicalSet;
@Inject
public PeriodicalsService(InstantiationService instantiationService,
Periodicals periodicals,
ServerStatus serverStatus,
Set<Periodical> periodicalSet) {
this.instantiationService = instantiationService;
this.periodicals = periodicals;
this.serverStatus = serverStatus;
this.periodicalSet = periodicalSet;
}
@Override
protected void startUp() throws Exception {
LOG.info("Starting {} periodicals ...", periodicalSet.size());
for (Periodical periodical : periodicalSet) {
try {
periodical.initialize();
if (periodical.masterOnly() && !serverStatus.hasCapability(ServerStatus.Capability.MASTER)) {
LOG.info("Not starting [{}] periodical. Only started on graylog2-server master nodes.", periodical.getClass().getCanonicalName());
continue;
}
if (!periodical.startOnThisNode()) {
LOG.info("Not starting [{}] periodical. Not configured to run on this node.", periodical.getClass().getCanonicalName());
continue;
}
// Register and start.
periodicals.registerAndStart(periodical);
} catch (Exception e) {
LOG.error("Could not initialize periodical.", e);
}
}
}
@Override
protected void shutDown() throws Exception {
for (Periodical periodical : periodicals.getAllStoppedOnGracefulShutdown()) {
LOG.info("Shutting down periodical [{}].", periodical.getClass().getCanonicalName());
Stopwatch s = Stopwatch.createStarted();
// Cancel future executions.
Map<Periodical,ScheduledFuture> futures = periodicals.getFutures();
if (futures.containsKey(periodical)) {
futures.get(periodical).cancel(false);
s.stop();
LOG.info("Shutdown of periodical [{}] complete, took <{}ms>.",
periodical.getClass().getCanonicalName(), s.elapsed(TimeUnit.MILLISECONDS));
} else {
LOG.error("Could not find periodical [{}] in futures list. Not stopping execution.",
periodical.getClass().getCanonicalName());
}
}
}
}