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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 java.lang.management.BufferPoolMXBean;
import java.lang.management.ManagementFactory;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Metric;
import com.codahale.metrics.MetricSet;
/**
* This is an alternative implementation of {@link com.codahale.metrics.jvm.BufferPoolMetricSet} that
* doesn't need an MBean server.
*/
public class AltBufferPoolMetricSet implements MetricSet {
@Override
public Map getMetrics() {
final Map metrics = new HashMap<>();
List pools = ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class);
for (final BufferPoolMXBean pool : pools) {
String name = pool.getName();
metrics.put(name + ".Count", (Gauge)() -> pool.getCount());
metrics.put(name + ".MemoryUsed", (Gauge)() -> pool.getMemoryUsed());
metrics.put(name + ".TotalCapacity", (Gauge)() -> pool.getTotalCapacity());
}
return metrics;
}
}