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AbstractSynchronizedPutMultimap.java
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AbstractSynchronizedPutMultimap.java
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/*
* Copyright (c) 2018 Goldman Sachs.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompany this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.eclipse.collections.impl.multimap;
import java.util.concurrent.atomic.AtomicInteger;
import org.eclipse.collections.api.collection.MutableCollection;
import org.eclipse.collections.api.map.MutableMap;
import org.eclipse.collections.impl.map.mutable.ConcurrentHashMap;
import org.eclipse.collections.impl.utility.Iterate;
public abstract class AbstractSynchronizedPutMultimap<K, V, C extends MutableCollection<V>> extends AbstractMutableMultimap<K, V, C>
{
private final AtomicInteger atomicTotalSize = new AtomicInteger(0);
protected AbstractSynchronizedPutMultimap()
{
}
protected AbstractSynchronizedPutMultimap(MutableMap<K, C> newMap)
{
super(newMap);
}
@Override
protected MutableMap<K, C> createMap()
{
return ConcurrentHashMap.newMap();
}
@Override
protected MutableMap<K, C> createMapWithKeyCount(int keyCount)
{
return ConcurrentHashMap.newMap(keyCount);
}
@Override
public int size()
{
return this.atomicTotalSize.get();
}
@Override
protected void incrementTotalSize()
{
this.atomicTotalSize.incrementAndGet();
}
@Override
protected void decrementTotalSize()
{
this.atomicTotalSize.decrementAndGet();
}
@Override
protected void addToTotalSize(int value)
{
this.atomicTotalSize.addAndGet(value);
}
@Override
protected void subtractFromTotalSize(int value)
{
this.atomicTotalSize.addAndGet(-value);
}
@Override
protected void clearTotalSize()
{
this.atomicTotalSize.set(0);
}
@Override
public boolean put(K key, V value)
{
MutableCollection<V> collection = this.getIfAbsentPutCollection(key);
synchronized (collection)
{
if (collection.add(value))
{
this.incrementTotalSize();
return true;
}
return false;
}
}
private C getIfAbsentPutCollection(K key)
{
return this.map.getIfAbsentPutWith(key, this.createCollectionBlock(), this);
}
@Override
public C getIfAbsentPutAll(K key, Iterable<? extends V> values)
{
if (Iterate.isEmpty(values))
{
return this.get(key);
}
C existingValues = this.getIfAbsentPutCollection(key);
synchronized (existingValues)
{
if (existingValues.isEmpty())
{
int newSize = Iterate.addAllTo(values, existingValues).size();
this.addToTotalSize(newSize);
}
return (C) existingValues.asUnmodifiable();
}
}
}