/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Portions Copyright 2006 Sun Microsystems, Inc.
 */
package org.opends.server.synchronization;

import java.io.Serializable;

/**
 * This Class is used to send acks between LDAP and changelog servers.
 */
public class AckMessage extends SynchronizationMessage implements Serializable
{
  private static final long serialVersionUID = -8695651898339602441L;

  // ChangeNumber of the update that was acked.
  private ChangeNumber changeNumber;

  /**
   * Creates a new AckMessage from a ChangeNumber.
   *
   * @param changeNumber The ChangeNumber used to build the AckMessage.
   */
  public AckMessage(ChangeNumber changeNumber)
  {
    this.changeNumber = changeNumber;
  }

  /**
   * Get the ChangeNumber from the message.
   *
   * @return the ChangeNumber
   */
  public ChangeNumber getChangeNumber()
  {
    return changeNumber;
  }
  /**
   * {@inheritDoc}
   */
  @Override
  public UpdateMessage processReceive(SynchronizationDomain domain)
  {
    domain.receiveAck(this);
    return null;
  }
}