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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.monitor.process;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Setting.Property;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.SingleObjectCache;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.node.ReportingService;
public final class ProcessService implements ReportingService {
private static final Logger logger = LogManager.getLogger(ProcessService.class);
private final ProcessProbe probe;
private final ProcessInfo info;
private final SingleObjectCache processStatsCache;
public static final Setting REFRESH_INTERVAL_SETTING = Setting.timeSetting(
"monitor.process.refresh_interval",
TimeValue.timeValueSeconds(1),
TimeValue.timeValueSeconds(1),
Property.NodeScope
);
public ProcessService(Settings settings) {
this.probe = ProcessProbe.getInstance();
final TimeValue refreshInterval = REFRESH_INTERVAL_SETTING.get(settings);
processStatsCache = new ProcessStatsCache(refreshInterval, probe.processStats());
this.info = probe.processInfo(refreshInterval.millis());
logger.debug("using refresh_interval [{}]", refreshInterval);
}
@Override
public ProcessInfo info() {
return this.info;
}
public ProcessStats stats() {
return processStatsCache.getOrRefresh();
}
private class ProcessStatsCache extends SingleObjectCache {
ProcessStatsCache(TimeValue interval, ProcessStats initValue) {
super(interval, initValue);
}
@Override
protected ProcessStats refresh() {
return probe.processStats();
}
}
}