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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.Gauge;
import com.codahale.metrics.Metric;
import java.io.IOException;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.function.BiConsumer;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.DynamicMBean;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.ReflectionException;
import javax.management.openmbean.OpenMBeanAttributeInfoSupport;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;
import org.apache.lucene.store.AlreadyClosedException;
import org.apache.solr.common.MapWriter;
import org.apache.solr.common.SolrException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Dynamically constructed map of metrics, intentionally different from {@link
* com.codahale.metrics.MetricSet} where each metric had to be known in advance and registered
* separately in {@link com.codahale.metrics.MetricRegistry}.
*
*
Note: this awkwardly extends {@link Gauge} and not {@link Metric} because awkwardly {@link
* Metric} instances are not supported by {@link com.codahale.metrics.MetricRegistryListener} :(
*
*
Note 2: values added to this metric map should belong to the list of types supported by JMX:
* {@link javax.management.openmbean.OpenType#ALLOWED_CLASSNAMES_LIST}, otherwise only their
* toString() representation will be shown in JConsole.
*/
public class MetricsMap implements Gauge