/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2013-2014 ForgeRock AS.
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*/
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package org.opends.server.replication.protocol;
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import java.util.zip.DataFormatException;
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/**
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* This message is used by LDAP server or by Replication Servers to
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* update the send window of the remote entities.
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*
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* A receiving entity should create such a message with a given credit
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* when it wants to open the send window of the remote entity.
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* A LDAP or Replication Server should increase its send window when receiving
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* such a message.
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*/
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public class WindowMsg extends ReplicationMsg
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{
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private final int numAck;
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/**
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* Create a new WindowMsg.
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*
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* @param numAck The number of acknowledged messages.
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* The window will be increase by this credit number.
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*/
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public WindowMsg(int numAck)
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{
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this.numAck = numAck;
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}
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/**
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* Creates a new WindowMsg from its encoded form.
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*
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* @param in The byte array containing the encoded form of the
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* WindowMsg.
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* @throws DataFormatException If the byte array does not contain a valid
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* encoded form of the WindowMsg.
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*/
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WindowMsg(byte[] in) throws DataFormatException
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{
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final ByteArrayScanner scanner = new ByteArrayScanner(in);
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final byte msgType = scanner.nextByte();
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if (msgType != MSG_TYPE_WINDOW)
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{
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throw new DataFormatException("input is not a valid Window Message");
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}
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numAck = scanner.nextIntUTF8();
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}
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/** {@inheritDoc} */
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@Override
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public byte[] getBytes(short protocolVersion)
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{
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final ByteArrayBuilder builder = new ByteArrayBuilder();
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builder.appendByte(MSG_TYPE_WINDOW);
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builder.appendIntUTF8(numAck);
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return builder.toByteArray();
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}
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/**
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* Get the number of message acknowledged by the Window message.
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*
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* @return the number of message acknowledged by the Window message.
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*/
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public int getNumAck()
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{
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return numAck;
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}
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/** {@inheritDoc} */
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@Override
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public String toString()
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{
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return "WindowMsg : " + "numAck: " + numAck;
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}
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}
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