org.graylog2.bindings.providers.ClusterEventBusProvider Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog 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.
*
* Graylog 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 Graylog. If not, see .
*/
package org.graylog2.bindings.providers;
import com.codahale.metrics.InstrumentedExecutorService;
import com.codahale.metrics.MetricRegistry;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.graylog2.events.ClusterEventBus;
import org.graylog2.shared.events.DeadEventLoggingListener;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Provider;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import static com.codahale.metrics.MetricRegistry.name;
public class ClusterEventBusProvider implements Provider {
private final int asyncEventbusProcessors;
private final MetricRegistry metricRegistry;
@Inject
public ClusterEventBusProvider(@Named("async_eventbus_processors") final int asyncEventbusProcessors,
final MetricRegistry metricRegistry) {
this.asyncEventbusProcessors = asyncEventbusProcessors;
this.metricRegistry = metricRegistry;
}
@Override
public ClusterEventBus get() {
final ClusterEventBus eventBus = new ClusterEventBus("cluster-eventbus", executorService(asyncEventbusProcessors));
eventBus.registerClusterEventSubscriber(new DeadEventLoggingListener());
return eventBus;
}
private ExecutorService executorService(int nThreads) {
final ThreadFactory threadFactory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat("cluster-eventbus-handler-%d").build();
return new InstrumentedExecutorService(
Executors.newFixedThreadPool(nThreads, threadFactory),
metricRegistry,
name("cluster-eventbus", "executor-service"));
}
}