| /* |
| * 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.size; |
| |
| import java.io.IOException; |
| import java.io.ObjectStreamException; |
| import java.io.Serializable; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.InternalGemFireError; |
| import org.apache.geode.annotations.Immutable; |
| import org.apache.geode.cache.Cache; |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.cache.util.ObjectSizer; |
| import org.apache.geode.distributed.internal.InternalDistributedSystem; |
| import org.apache.geode.internal.cache.PlaceHolderDiskRegion; |
| import org.apache.geode.internal.size.ObjectGraphSizer.ObjectFilter; |
| import org.apache.geode.internal.statistics.StatisticsManager; |
| |
| /** |
| * An implementation of {@link ObjectSizer} that calculates an accurate, in memory size of for each |
| * object that it sizes. This is the slowest method of calculating sizes, but it should accurately |
| * reflect the amount of heap memory used for objects. |
| * |
| * This class will traverse all objects that are reachable from the passed in object by instance |
| * fields. So use this class with caution if you have instance fields that refer to shared objects. |
| * |
| * For objects that are all approximately the same size, consider using |
| * {@link SizeClassOnceObjectSizer} |
| * |
| * |
| */ |
| public class ReflectionObjectSizer implements ObjectSizer, Serializable { |
| |
| @Immutable |
| private static final ReflectionObjectSizer INSTANCE = new ReflectionObjectSizer(); |
| |
| @Immutable |
| private static final ObjectFilter FILTER = new ObjectFilter() { |
| |
| @Override |
| public boolean accept(Object parent, Object object) { |
| // Protect the user from a couple of pitfalls. If their object |
| // has a link to a region or cache, we don't want to size the whole thing. |
| if (object instanceof Region |
| || object instanceof Cache |
| || object instanceof PlaceHolderDiskRegion |
| || object instanceof InternalDistributedSystem |
| || object instanceof ClassLoader |
| || object instanceof Logger |
| || object instanceof StatisticsManager) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| }; |
| |
| @Override |
| public int sizeof(Object o) { |
| try { |
| return (int) ObjectGraphSizer.size(o, FILTER, false); |
| } catch (IllegalArgumentException e) { |
| throw new InternalGemFireError(e); |
| } catch (IllegalAccessException e) { |
| throw new InternalGemFireError(e); |
| } |
| } |
| |
| public static ReflectionObjectSizer getInstance() { |
| return INSTANCE; |
| } |
| |
| private void writeObject(java.io.ObjectOutputStream out) throws IOException {} |
| |
| private void readObject(java.io.ObjectInputStream in) |
| throws IOException, ClassNotFoundException {} |
| |
| private Object readResolve() throws ObjectStreamException { |
| return INSTANCE; |
| } |
| |
| private ReflectionObjectSizer() { |
| |
| } |
| |
| } |