| /* |
| * 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.geode.management.internal.beans.stats; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.StatisticDescriptor; |
| import org.apache.geode.Statistics; |
| import org.apache.geode.StatisticsType; |
| import org.apache.geode.internal.statistics.StatisticId; |
| import org.apache.geode.internal.statistics.StatisticNotFoundException; |
| import org.apache.geode.internal.statistics.StatisticsListener; |
| import org.apache.geode.internal.statistics.StatisticsNotification; |
| import org.apache.geode.internal.statistics.ValueMonitor; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| /** |
| * Class to get mappings of stats name to their values |
| */ |
| public class MBeanStatsMonitor implements StatisticsListener { |
| |
| private static final Logger logger = LogService.getLogger(); |
| |
| protected ValueMonitor monitor; |
| |
| /** |
| * Map which contains statistics with their name and value |
| */ |
| protected Map<String, Number> statsMap; |
| |
| private String monitorName; |
| |
| public MBeanStatsMonitor(final String name) { |
| this(name, new ValueMonitor()); |
| } |
| |
| MBeanStatsMonitor(final String name, final ValueMonitor monitor) { |
| this.monitorName = name; |
| this.monitor = monitor; |
| this.statsMap = new HashMap<>(); |
| } |
| |
| public void addStatisticsToMonitor(final Statistics stats) { |
| monitor.addListener(this);// if already listener is added this will be a no-op |
| // Initialize the stats with the current values. |
| StatisticsType type = stats.getType(); |
| StatisticDescriptor[] descriptors = type.getStatistics(); |
| for (StatisticDescriptor d : descriptors) { |
| statsMap.put(d.getName(), stats.get(d)); |
| } |
| |
| monitor.addStatistics(stats); |
| } |
| |
| public void removeStatisticsFromMonitor(final Statistics stats) { |
| statsMap.clear(); |
| } |
| |
| public void stopListener() { |
| monitor.removeListener(this); |
| } |
| |
| public Number getStatistic(final String statName) { |
| Number value = statsMap.getOrDefault(statName, 0); |
| return value != null ? value : 0; |
| } |
| |
| @Override |
| public void handleNotification(final StatisticsNotification notification) { |
| for (StatisticId statId : notification) { |
| StatisticDescriptor descriptor = statId.getStatisticDescriptor(); |
| String name = descriptor.getName(); |
| Number value; |
| try { |
| value = notification.getValue(statId); |
| } catch (StatisticNotFoundException e) { |
| value = 0; |
| } |
| log(name, value); |
| statsMap.put(name, value); |
| } |
| } |
| |
| protected void log(final String name, final Number value) { |
| if (logger.isTraceEnabled()) { |
| logger.trace("Monitor = {} descriptor = {} And value = {}", monitorName, name, value); |
| } |
| } |
| } |