/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying * information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Portions Copyright 2006 Sun Microsystems, Inc.
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*/
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package org.opends.server.synchronization;
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import java.io.Serializable;
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import java.io.UnsupportedEncodingException;
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import java.util.zip.DataFormatException;
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/**
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* Used to send acks between LDAP and changelog servers.
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*/
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public class AckMessage extends SynchronizationMessage implements Serializable
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{
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private static final long serialVersionUID = -8695651898339602441L;
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// ChangeNumber of the update that was acked.
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private ChangeNumber changeNumber;
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/**
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* Creates a new AckMessage from a ChangeNumber.
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*
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* @param changeNumber The ChangeNumber used to build the AckMessage.
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*/
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public AckMessage(ChangeNumber changeNumber)
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{
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this.changeNumber = changeNumber;
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}
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/**
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* Creates a new AckMessage by decoding the provided byte array.
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*
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* @param in The byte array containing the encoded form of the AckMessage.
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* @throws DataFormatException If in does not contain a properly encoded
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* AckMessage.
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*/
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public AckMessage(byte[] in) throws DataFormatException
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{
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try
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{
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/* first byte is the type */
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if (in[0] != MSG_TYPE_ACK)
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throw new DataFormatException("byte[] is not a valid modify msg");
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int pos = 1;
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/* read the changeNumber
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* it is always 24 characters long
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*/
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String changenumberStr = new String(in, pos, 24, "UTF-8");
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changeNumber = new ChangeNumber(changenumberStr);
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pos +=24;
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} catch (UnsupportedEncodingException e)
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{
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throw new DataFormatException("UTF-8 is not supported by this jvm.");
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}
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}
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/**
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* Get the ChangeNumber from the message.
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*
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* @return the ChangeNumber
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*/
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public ChangeNumber getChangeNumber()
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{
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return changeNumber;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public UpdateMessage processReceive(SynchronizationDomain domain)
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{
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domain.receiveAck(this);
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return null;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public byte[] getBytes()
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{
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try
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{
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int length = 1 + 24;
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byte[] resultByteArray = new byte[length];
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int pos = 1;
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/* put the type of the operation */
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resultByteArray[0] = MSG_TYPE_ACK;
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resultByteArray[pos++] = 0;
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/* put the ChangeNumber */
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byte[] changeNumberByte;
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changeNumberByte = this.getChangeNumber().toString().getBytes("UTF-8");
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for (int i=0; i<24; i++,pos++)
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{
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resultByteArray[pos] = changeNumberByte[i];
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}
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return resultByteArray;
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} catch (UnsupportedEncodingException e)
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{
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return null;
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}
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}
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}
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