| /* |
| * 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.internal.statistics; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.geode.StatisticDescriptor; |
| import org.apache.geode.Statistics; |
| import org.apache.geode.internal.CopyOnWriteHashSet; |
| |
| /** |
| * Adds coarser-grained monitoring of entire Statistics instances. |
| * <p> |
| * The following code is an example of how to find an existing Statistics instance and define a |
| * ValueMonitor listener for notifications of any stat sample containing updates to any stats in the |
| * instance being monitored: |
| * |
| * <pre> |
| * StatisticsFactory factory = InternalDistributedSystem.getAnyInstance(); Statistics[] statistics = |
| * f.findStatisticsByTextId("statSampler"); if (statistics.length == 1) { ValueMonitor monitor = new |
| * ValueMonitor().addStatistics(statistics[0]); |
| * |
| * monitor.addListener(new StatisticsListener() { public void |
| * handleNotification(StatisticsNotification notify) { System.out.println("One or more statSampler |
| * stats changed at " + notify.getTimeStamp()); for (StatisticId statId : notify) { |
| * System.out.println("\t" + statId.getStatisticDescriptor().getName() + " = " + |
| * notify.getValue(statId)); } } }; } |
| * |
| * @since GemFire 7.0 |
| * @see org.apache.geode.Statistics |
| */ |
| public class ValueMonitor extends StatisticsMonitor { |
| |
| public enum Type { |
| CHANGE, MATCH, DIFFER |
| } |
| |
| private final CopyOnWriteHashSet<Statistics> statistics = new CopyOnWriteHashSet<>(); |
| |
| public ValueMonitor() { |
| super(); |
| } |
| |
| @Override |
| public ValueMonitor addStatistic(final StatisticId statId) { |
| super.addStatistic(statId); |
| return this; |
| } |
| |
| @Override |
| public ValueMonitor removeStatistic(final StatisticId statId) { |
| super.removeStatistic(statId); |
| return this; |
| } |
| |
| public ValueMonitor addStatistics(final Statistics statistics) { |
| if (statistics == null) { |
| throw new NullPointerException("Statistics is null"); |
| } |
| this.statistics.add(statistics); |
| return this; |
| } |
| |
| public ValueMonitor removeStatistics(final Statistics statistics) { |
| if (statistics == null) { |
| throw new NullPointerException("Statistics is null"); |
| } |
| this.statistics.remove(statistics); |
| return this; |
| } |
| |
| @Override |
| protected void monitor(final long millisTimeStamp, |
| final List<ResourceInstance> resourceInstances) { |
| super.monitor(millisTimeStamp, resourceInstances); |
| monitorStatistics(millisTimeStamp, resourceInstances); |
| } |
| |
| protected void monitorStatistics(final long millisTimeStamp, |
| final List<ResourceInstance> resourceInstances) { |
| if (!statistics.isEmpty()) { |
| Map<StatisticId, Number> stats = new HashMap<>(); |
| for (ResourceInstance resource : resourceInstances) { |
| if (statistics.contains(resource.getStatistics())) { |
| ResourceType resourceType = resource.getResourceType(); |
| StatisticDescriptor[] sds = resourceType.getStatisticDescriptors(); |
| resource.setStatValuesNotified(true); |
| int[] updatedStats = resource.getUpdatedStats(); |
| for (int idx : updatedStats) { |
| StatisticDescriptorImpl sdi = (StatisticDescriptorImpl) sds[idx]; |
| SimpleStatisticId statId = new SimpleStatisticId(sdi, resource.getStatistics()); |
| long rawbits = resource.getLatestStatValues()[idx]; |
| stats.put(statId, sdi.getNumberForRawBits(rawbits)); |
| } |
| } |
| } |
| if (!stats.isEmpty()) { |
| MapBasedStatisticsNotification notification = new MapBasedStatisticsNotification( |
| millisTimeStamp, StatisticsNotification.Type.VALUE_CHANGED, stats); |
| notifyListeners(notification); |
| } |
| } |
| } |
| |
| @Override |
| protected StringBuilder appendToString() { |
| final StringBuilder sb = new StringBuilder(); |
| sb.append("statistics=").append(statistics); |
| return sb; |
| } |
| } |