/**
* Copyright (C) 2012-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ninja.metrics.ganglia;
import info.ganglia.gmetric4j.gmetric.GMetric;
import info.ganglia.gmetric4j.gmetric.GMetric.UDPAddressingMode;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import ninja.lifecycle.Dispose;
import ninja.lifecycle.Start;
import ninja.metrics.MetricsService;
import ninja.utils.NinjaProperties;
import ninja.utils.TimeUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.codahale.metrics.ganglia.GangliaReporter;
import com.google.inject.Inject;
import com.google.inject.Singleton;
/**
* Integration of Ninja Metrics with Ganglia.
*
* @author James Moger
*/
@Singleton
public class NinjaGanglia {
private final Logger log = LoggerFactory.getLogger(NinjaGanglia.class);
private final NinjaProperties ninjaProperties;
private final MetricsService metricsService;
private GangliaReporter reporter;
@Inject
public NinjaGanglia(NinjaProperties ninjaProperties,
MetricsService metricsService) {
this.ninjaProperties = ninjaProperties;
this.metricsService = metricsService;
}
@Start(order = 90)
public void start() {
if (ninjaProperties.getBooleanWithDefault("metrics.ganglia.enabled",
false)) {
final String hostname = metricsService.getHostname();
final String address = ninjaProperties
.getOrDie("metrics.ganglia.address");
final int port = ninjaProperties.getIntegerWithDefault(
"metrics.ganglia.port", 8649);
final String period = ninjaProperties.getWithDefault(
"metrics.ganglia.period", "60s");
final int delay = TimeUtil.parseDuration(period);
try {
GMetric ganglia = new GMetric(address, port,
UDPAddressingMode.MULTICAST, 1);
reporter = GangliaReporter
.forRegistry(metricsService.getMetricRegistry())
.convertRatesTo(TimeUnit.SECONDS)
.convertDurationsTo(TimeUnit.MILLISECONDS)
.build(ganglia);
reporter.start(delay, TimeUnit.SECONDS);
log.info(
"Started Ganglia Metrics reporter for '{}', updating every {}",
hostname, period);
} catch (IOException e) {
log.error("Failed to start Ganglia reporter!", e);
}
}
}
@Dispose(order = 10)
public void stop() {
if (reporter != null) {
reporter.stop();
log.debug("Stopped Ganglia Metrics reporter");
}
}
}