/*
* Copyright Terracotta, Inc.
*
* Licensed 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.ehcache.impl.internal.sizeof;
import org.ehcache.core.spi.store.heap.LimitExceededException;
import org.ehcache.impl.internal.concurrent.ConcurrentHashMap;
import org.ehcache.impl.copy.IdentityCopier;
import org.ehcache.impl.internal.sizeof.listeners.EhcacheVisitorListener;
import org.ehcache.impl.internal.sizeof.listeners.exceptions.VisitorListenerException;
import org.ehcache.impl.internal.store.heap.holders.CopiedOnHeapKey;
import org.ehcache.sizeof.SizeOf;
import org.ehcache.sizeof.SizeOfFilterSource;
import org.ehcache.core.spi.store.Store;
import org.ehcache.core.spi.store.heap.SizeOfEngine;
/**
* @author Abhilash
*
*/
public class DefaultSizeOfEngine implements SizeOfEngine {
private final long maxObjectGraphSize;
private final long maxObjectSize;
private final SizeOf sizeOf;
private final long chmTreeBinOffset;
private final long onHeapKeyOffset;
private final SizeOfFilterSource filterSource = new SizeOfFilterSource(true);
public DefaultSizeOfEngine(long maxObjectGraphSize, long maxObjectSize) {
this.maxObjectGraphSize = maxObjectGraphSize;
this.maxObjectSize = maxObjectSize;
this.sizeOf = SizeOf.newInstance(filterSource.getFilters());
this.onHeapKeyOffset = sizeOf.deepSizeOf(new CopiedOnHeapKey<Object>(new Object(), new IdentityCopier<Object>()));
this.chmTreeBinOffset = sizeOf.deepSizeOf(ConcurrentHashMap.FAKE_TREE_BIN);
}
@Override
public <K, V> long sizeof(K key, Store.ValueHolder<V> holder) throws LimitExceededException {
try {
return sizeOf.deepSizeOf(new EhcacheVisitorListener(maxObjectGraphSize, maxObjectSize), key, holder) + this.chmTreeBinOffset + this.onHeapKeyOffset;
} catch (VisitorListenerException e) {
throw new LimitExceededException(e.getMessage());
}
}
}