/**
* 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.initializers;
import com.codahale.metrics.InstrumentedExecutorService;
import com.codahale.metrics.MetricRegistry;
import com.google.common.util.concurrent.AbstractIdleService;
import org.graylog2.Configuration;
import org.graylog2.buffers.Buffers;
import org.graylog2.caches.Caches;
import org.graylog2.indexer.cluster.Cluster;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
@Singleton
public class BufferSynchronizerService extends AbstractIdleService {
private static final Logger LOG = LoggerFactory.getLogger(BufferSynchronizerService.class);
private final Buffers bufferSynchronizer;
private final Caches cacheSynchronizer;
private final Cluster cluster;
private final Configuration configuration;
private final MetricRegistry metricRegistry;
private volatile boolean indexerAvailable = true;
@Inject
public BufferSynchronizerService(final Buffers bufferSynchronizer,
final Caches cacheSynchronizer,
final Cluster cluster,
final Configuration configuration,
final MetricRegistry metricRegistry) {
this.bufferSynchronizer = bufferSynchronizer;
this.cacheSynchronizer = cacheSynchronizer;
this.cluster = cluster;
this.configuration = configuration;
this.metricRegistry = metricRegistry;
}
@Override
protected void startUp() throws Exception {
}
@Override
protected void shutDown() throws Exception {
LOG.debug("Stopping BufferSynchronizerService");
if (indexerAvailable && cluster.isConnectedAndHealthy()) {
final ExecutorService executorService = new InstrumentedExecutorService(Executors.newFixedThreadPool(2), metricRegistry);
executorService.submit(new Runnable() {
@Override
public void run() {
bufferSynchronizer.waitForEmptyBuffers(configuration.getShutdownTimeout(), TimeUnit.MILLISECONDS);
}
});
executorService.submit(new Runnable() {
@Override
public void run() {
cacheSynchronizer.waitForEmptyCaches(configuration.getShutdownTimeout(), TimeUnit.MILLISECONDS);
}
});
executorService.shutdown();
executorService.awaitTermination(configuration.getShutdownTimeout(), TimeUnit.MILLISECONDS);
} else {
LOG.warn("Elasticsearch is unavailable. Not waiting to clear buffers and caches, as we have no healthy cluster.");
}
LOG.debug("Stopped BufferSynchronizerService");
}
public void setIndexerUnavailable() {
indexerAvailable = false;
}
}