org.jppf.utils.collections.AbstractCollectionConcurrentMap Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jppf-common Show documentation

JPPF, the open source grid computing solution

There is a newer version: 6.3-alpha

/*
 * JPPF.
 * Copyright (C) 2005-2015 JPPF Team.
 * http://www.jppf.org
 *
 * 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.jppf.utils.collections;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;

/**
 * A {@link ConcurrentHashMap} whose values are {@link Collection} instances (specialized in concrete subclasses).
 * @param  the type of the keys.
 * @param  the type of the objects in the map's collection values.
 * @author Laurent Cohen
 */
public abstract class AbstractCollectionConcurrentMap extends AbstractCollectionMap
{
  /**
   * Default constructor.
   */
  public AbstractCollectionConcurrentMap()
  {
    this.map = createMap();
  }

  @Override
  protected Map> createMap()
  {
    return new ConcurrentHashMap<>();
  }

  @Override
  public void putValue(final K key, final V value)
  {
    Collection newColl = newCollection();
    Collection coll = ((ConcurrentHashMap>) map).putIfAbsent(key, newColl);
    if (coll == null) coll = newColl;
    coll.add(value);
  }

  @Override
  public void addValues(final K key, final V... values)
  {
    Collection newColl = newCollection();
    Collection coll = ((ConcurrentHashMap>) map).putIfAbsent(key, newColl);
    if (coll == null) coll = newColl;
    for (V value: values) coll.add(value);
  }
}