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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.monitor.os;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.SingleObjectCache;
import org.elasticsearch.common.util.concurrent.EsExecutors;
/**
*
*/
public class OsService extends AbstractComponent {
private final OsProbe probe;
private final OsInfo info;
private SingleObjectCache<OsStats> osStatsCache;
public OsService(Settings settings) {
super(settings);
this.probe = OsProbe.getInstance();
TimeValue refreshInterval = settings.getAsTime("monitor.os.refresh_interval", TimeValue.timeValueSeconds(1));
this.info = probe.osInfo();
this.info.refreshInterval = refreshInterval.millis();
this.info.allocatedProcessors = EsExecutors.boundedNumberOfProcessors(settings);
osStatsCache = new OsStatsCache(refreshInterval, probe.osStats());
logger.debug("Using probe [{}] with refresh_interval [{}]", probe, refreshInterval);
}
public OsInfo info() {
return this.info;
}
public synchronized OsStats stats() {
return osStatsCache.getOrRefresh();
}
private class OsStatsCache extends SingleObjectCache<OsStats> {
public OsStatsCache(TimeValue interval, OsStats initValue) {
super(interval, initValue);
}
@Override
protected OsStats refresh() {
return probe.osStats();
}
}
}
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