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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing

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/*
 * 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.concurrent;

/**
 * Any additional result state needed to be passed to {@link MapCallback} which returns values by
 * reference.
 * 
 * @since GemFire Helios
 */
public interface MapResult {

  /**
   * Set whether the result of {@link MapCallback#newValue} created a new value or not. If not, then
   * the result value of newValue is not inserted into the map though it is still returned by the
   * create methods. Default for MapResult is assumed to be true if this method was not invoked by
   * {@link MapCallback} explicitly.
   */
  public void setNewValueCreated(boolean created);

  /**
   * Result set by {@link #setNewValueCreated(boolean)}. Default is required to be true.
   */
  public boolean isNewValueCreated();
}