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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.solr.metrics;
import com.codahale.metrics.Metric;
import com.codahale.metrics.MetricSet;
import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.util.HashMap;
import java.util.Map;
import org.apache.solr.util.stats.MetricUtils;
/**
* This is an extended replacement for {@link com.codahale.metrics.jvm.FileDescriptorRatioGauge} -
* that class uses reflection and doesn't work under Java 9. This implementation tries to retrieve
* bean properties from known implementations of {@link java.lang.management.OperatingSystemMXBean}.
*/
public class OperatingSystemMetricSet implements MetricSet {
@Override
public Map getMetrics() {
final Map metrics = new HashMap<>();
OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
MetricUtils.addMXBeanMetrics(
os,
MetricUtils.OS_MXBEAN_CLASSES,
null,
(k, v) -> {
if (!metrics.containsKey(k)) {
metrics.put(k, v);
}
});
return metrics;
}
}