001 /*
002 * CDDL HEADER START
003 *
004 * The contents of this file are subject to the terms of the
005 * Common Development and Distribution License, Version 1.0 only
006 * (the "License"). You may not use this file except in compliance
007 * with the License.
008 *
009 * You can obtain a copy of the license at
010 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
011 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
012 * See the License for the specific language governing permissions
013 * and limitations under the License.
014 *
015 * When distributing Covered Code, include this CDDL HEADER in each
016 * file and include the License file at
017 * trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
018 * add the following below this CDDL HEADER, with the fields enclosed
019 * by brackets "[]" replaced with your own identifying information:
020 * Portions Copyright [yyyy] [name of copyright owner]
021 *
022 * CDDL HEADER END
023 *
024 *
025 * Copyright 2008 Sun Microsystems, Inc.
026 */
027 package org.opends.server.replication.protocol;
028
029 import java.io.Serializable;
030 import java.io.UnsupportedEncodingException;
031 import java.util.zip.DataFormatException;
032
033 /**
034 * This message is part of the replication protocol.
035 * RS1 sends a MonitorRequestMessage to RS2 to requests its monitoring
036 * informations.
037 * When RS2 receives a MonitorRequestMessage from RS1, RS2 responds with a
038 * MonitorMessage.
039 */
040 public class MonitorRequestMessage extends RoutableMessage implements
041 Serializable
042 {
043
044 private static final long serialVersionUID = -2407640479423633234L;
045
046 /**
047 * Creates a message.
048 *
049 * @param sender The sender server of this message.
050 * @param destination The server or servers targetted by this message.
051 */
052 public MonitorRequestMessage(short sender, short destination)
053 {
054 super(sender, destination);
055 }
056
057 /**
058 * Creates a new message by decoding the provided byte array.
059 * @param in A byte array containing the encoded information for the message,
060 * @throws DataFormatException If the in does not contain a properly,
061 * encoded message.
062 */
063 public MonitorRequestMessage(byte[] in) throws DataFormatException
064 {
065 super();
066 try
067 {
068 // First byte is the type
069 if (in[0] != MSG_TYPE_REPL_SERVER_MONITOR_REQUEST)
070 throw new DataFormatException("input is not a valid " +
071 this.getClass().getCanonicalName());
072 int pos = 1;
073
074 // sender
075 int length = getNextLength(in, pos);
076 String senderString = new String(in, pos, length, "UTF-8");
077 this.senderID = Short.valueOf(senderString);
078 pos += length +1;
079
080 // destination
081 length = getNextLength(in, pos);
082 String destinationString = new String(in, pos, length, "UTF-8");
083 this.destination = Short.valueOf(destinationString);
084 pos += length +1;
085
086 } catch (UnsupportedEncodingException e)
087 {
088 throw new DataFormatException("UTF-8 is not supported by this jvm.");
089 }
090 }
091
092 /**
093 * {@inheritDoc}
094 */
095 @Override
096 public byte[] getBytes()
097 {
098 try
099 {
100 byte[] senderBytes = String.valueOf(senderID).getBytes("UTF-8");
101 byte[] destinationBytes = String.valueOf(destination).getBytes("UTF-8");
102
103 int length = 1 + senderBytes.length + 1
104 + destinationBytes.length + 1;
105
106 byte[] resultByteArray = new byte[length];
107
108 /* put the type of the operation */
109 resultByteArray[0] = MSG_TYPE_REPL_SERVER_MONITOR_REQUEST;
110 int pos = 1;
111
112 /* put the sender */
113 pos = addByteArray(senderBytes, resultByteArray, pos);
114
115 /* put the destination */
116 pos = addByteArray(destinationBytes, resultByteArray, pos);
117
118 return resultByteArray;
119 }
120 catch (UnsupportedEncodingException e)
121 {
122 return null;
123 }
124 }
125 }