root / DistributedBackupService / src / handlers / Message.java @ 2
History | View | Annotate | Download (5.29 KB)
| 1 |
package handlers; |
|---|---|
| 2 |
|
| 3 |
import utils.Utils; |
| 4 |
import utils.Utils.MessageType; |
| 5 |
|
| 6 |
import java.io.*; |
| 7 |
|
| 8 |
public class Message { |
| 9 |
|
| 10 |
private int argsNo; |
| 11 |
|
| 12 |
private int chunkNo; |
| 13 |
private int senderID; |
| 14 |
private String fileID; |
| 15 |
private String version; |
| 16 |
private int replication; |
| 17 |
private MessageType msgType;
|
| 18 |
|
| 19 |
private byte [] body; |
| 20 |
|
| 21 |
public Message(byte[] information, int length) { |
| 22 |
String header;
|
| 23 |
String headerWithoutStuff;
|
| 24 |
String [] splittedHeader; |
| 25 |
|
| 26 |
header= readHeader(information); |
| 27 |
|
| 28 |
headerWithoutStuff = header.trim().replaceAll("\\s+", " "); |
| 29 |
splittedHeader = headerWithoutStuff.split("\\s+");
|
| 30 |
translateHeader(splittedHeader); |
| 31 |
|
| 32 |
if (msgType == MessageType.CHUNK)
|
| 33 |
this.body = readBody(information, header.length(), length);
|
| 34 |
|
| 35 |
if(msgType == MessageType.PUTCHUNK)
|
| 36 |
this.body = readBody(information, header.length(), length);
|
| 37 |
} |
| 38 |
|
| 39 |
public Message(MessageType type, String[] args) { |
| 40 |
this.msgType = type;
|
| 41 |
version = args[0];
|
| 42 |
senderID = Integer.parseInt(args[1]); |
| 43 |
fileID = args[2];
|
| 44 |
|
| 45 |
if (type != MessageType.DELETE)
|
| 46 |
chunkNo = Integer.parseInt(args[3]); |
| 47 |
|
| 48 |
if (type == MessageType.PUTCHUNK) {
|
| 49 |
replication = Integer.parseInt(args[4]); |
| 50 |
} |
| 51 |
} |
| 52 |
|
| 53 |
public Message(MessageType type, String[] args, byte[] information) { |
| 54 |
this(type, args);
|
| 55 |
body = information; |
| 56 |
} |
| 57 |
|
| 58 |
private String readHeader(byte[] information) { |
| 59 |
ByteArrayInputStream stream;
|
| 60 |
BufferedReader reader;
|
| 61 |
String header = ""; |
| 62 |
|
| 63 |
stream = new ByteArrayInputStream(information); |
| 64 |
reader = new BufferedReader(new InputStreamReader(stream)); |
| 65 |
|
| 66 |
try {
|
| 67 |
header = reader.readLine(); |
| 68 |
} catch (IOException e) { |
| 69 |
e.printStackTrace(); |
| 70 |
} |
| 71 |
return header;
|
| 72 |
} |
| 73 |
|
| 74 |
private byte[] readBody(byte[] information, int headerLength, int informationLength) { |
| 75 |
int readBytes;
|
| 76 |
ByteArrayInputStream message;
|
| 77 |
byte[] bodyContent; |
| 78 |
|
| 79 |
readBytes = informationLength - headerLength - 4;
|
| 80 |
message = new ByteArrayInputStream(information, headerLength + 4, readBytes); |
| 81 |
bodyContent = new byte[readBytes]; |
| 82 |
|
| 83 |
message.read(bodyContent, 0, readBytes);
|
| 84 |
|
| 85 |
return bodyContent;
|
| 86 |
} |
| 87 |
|
| 88 |
private void translateHeader(String[] headerSplit) { |
| 89 |
switch (headerSplit[0]) { |
| 90 |
case "PUTCHUNK": |
| 91 |
{
|
| 92 |
msgType = MessageType.PUTCHUNK; |
| 93 |
argsNo = 6;
|
| 94 |
} break;
|
| 95 |
case "STORED": |
| 96 |
{
|
| 97 |
msgType = MessageType.STORED; |
| 98 |
argsNo = 5;
|
| 99 |
} |
| 100 |
break;
|
| 101 |
case "GETCHUNK": |
| 102 |
{
|
| 103 |
msgType = MessageType.GETCHUNK; |
| 104 |
argsNo = 5;
|
| 105 |
} break;
|
| 106 |
case "CHUNK": |
| 107 |
{ msgType = MessageType.CHUNK;
|
| 108 |
argsNo = 5;
|
| 109 |
} break;
|
| 110 |
case "DELETE": |
| 111 |
{
|
| 112 |
msgType = MessageType.DELETE; |
| 113 |
argsNo = 4;
|
| 114 |
} break;
|
| 115 |
case "REMOVED": |
| 116 |
{
|
| 117 |
msgType = MessageType.REMOVED; |
| 118 |
argsNo = 5;
|
| 119 |
} break;
|
| 120 |
default:
|
| 121 |
return;
|
| 122 |
} |
| 123 |
|
| 124 |
if (headerSplit.length != argsNo)
|
| 125 |
return;
|
| 126 |
|
| 127 |
version = headerSplit[1];
|
| 128 |
senderID = Integer.parseInt(headerSplit[2]); |
| 129 |
fileID = headerSplit[3];
|
| 130 |
|
| 131 |
if (argsNo > 4) |
| 132 |
chunkNo = Integer.parseInt(headerSplit[4]); |
| 133 |
|
| 134 |
if (msgType == MessageType.PUTCHUNK)
|
| 135 |
replication = Integer.parseInt(headerSplit[5]); |
| 136 |
|
| 137 |
} |
| 138 |
|
| 139 |
public String headerString() { |
| 140 |
String string;
|
| 141 |
if(msgType == MessageType.PUTCHUNK)
|
| 142 |
string = msgType + " " + version + " " + senderID + " " + fileID + " " + chunkNo + " " + replication + " " + Utils.CRLF + Utils.CRLF; |
| 143 |
else if(msgType == MessageType.DELETE) |
| 144 |
string = msgType + " " + version + " " + senderID + " " + fileID + " " + Utils.CRLF + Utils.CRLF; |
| 145 |
else
|
| 146 |
string = msgType + " " + version + " " + senderID + " " + fileID + " " + chunkNo + " " + Utils.CRLF + Utils.CRLF; |
| 147 |
return string;
|
| 148 |
} |
| 149 |
|
| 150 |
public byte[] getBytes() throws IOException { |
| 151 |
byte header[]; |
| 152 |
header = headerString().getBytes(); |
| 153 |
|
| 154 |
if (body == null) |
| 155 |
return header;
|
| 156 |
else {
|
| 157 |
ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| 158 |
out.write(header); |
| 159 |
out.write(body); |
| 160 |
return out.toByteArray();
|
| 161 |
} |
| 162 |
} |
| 163 |
|
| 164 |
@Override
|
| 165 |
public String toString() { |
| 166 |
String str;
|
| 167 |
if(msgType == MessageType.PUTCHUNK)
|
| 168 |
{
|
| 169 |
str = "<" + msgType +">" + " " + "<" + version+">" + " " + "<" + senderID+">" + " " +"<" + fileID+">" + " " + "<" +chunkNo+">"; |
| 170 |
} |
| 171 |
else if(msgType == MessageType.DELETE) |
| 172 |
{
|
| 173 |
str = "<" + msgType +">" + " " + "<" + version+">" + " " + "<" + senderID+">" + " " +"<" + fileID+">"; |
| 174 |
} |
| 175 |
else
|
| 176 |
{
|
| 177 |
str = "<" + msgType +">" + " " + "<" + version+">" + " " + "<" + senderID+">" + " " +"<" + fileID+">" + " " + "<" +chunkNo+">"; |
| 178 |
} |
| 179 |
return str;
|
| 180 |
} |
| 181 |
|
| 182 |
// Getters and Setters
|
| 183 |
|
| 184 |
public String getVersion() { |
| 185 |
return version;
|
| 186 |
} |
| 187 |
|
| 188 |
public int getSenderID() { |
| 189 |
return senderID;
|
| 190 |
} |
| 191 |
|
| 192 |
public String getFileID() { |
| 193 |
return fileID;
|
| 194 |
} |
| 195 |
|
| 196 |
public int getChunkNo() { |
| 197 |
return chunkNo;
|
| 198 |
} |
| 199 |
|
| 200 |
public int getReplicationDegree() { |
| 201 |
return replication;
|
| 202 |
} |
| 203 |
|
| 204 |
public byte[] getBody() { |
| 205 |
return body;
|
| 206 |
} |
| 207 |
|
| 208 |
public MessageType getType() {
|
| 209 |
return msgType;
|
| 210 |
} |
| 211 |
|
| 212 |
public int getArgsNo() { |
| 213 |
return argsNo;
|
| 214 |
} |
| 215 |
|
| 216 |
public int getReplication() { |
| 217 |
return replication;
|
| 218 |
} |
| 219 |
|
| 220 |
public MessageType getMsgType() {
|
| 221 |
return msgType;
|
| 222 |
} |
| 223 |
|
| 224 |
public void setArgsNo(int argsNo) { |
| 225 |
this.argsNo = argsNo;
|
| 226 |
} |
| 227 |
|
| 228 |
public void setChunkNo(int chunkNo) { |
| 229 |
this.chunkNo = chunkNo;
|
| 230 |
} |
| 231 |
|
| 232 |
public void setSenderID(int senderID) { |
| 233 |
this.senderID = senderID;
|
| 234 |
} |
| 235 |
|
| 236 |
public void setFileID(String fileID) { |
| 237 |
this.fileID = fileID;
|
| 238 |
} |
| 239 |
|
| 240 |
public void setVersion(String version) { |
| 241 |
this.version = version;
|
| 242 |
} |
| 243 |
|
| 244 |
public void setReplication(int replication) { |
| 245 |
this.replication = replication;
|
| 246 |
} |
| 247 |
|
| 248 |
public void setMsgType(MessageType msgType) { |
| 249 |
this.msgType = msgType;
|
| 250 |
} |
| 251 |
|
| 252 |
public void setBody(byte[] body) { |
| 253 |
this.body = body;
|
| 254 |
} |
| 255 |
|
| 256 |
} |