root / DistributedBackupService / src / handlers / Message.java
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package handlers; |
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import utils.Utils; |
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import utils.Utils.MessageType; |
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import java.io.*; |
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public class Message { |
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private int argsNo; |
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private int chunkNo; |
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private int senderID; |
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private String fileID; |
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private String version; |
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private int replication; |
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private MessageType msgType;
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private byte [] body; |
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public Message(byte[] information, int length) { |
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String header;
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String headerWithoutStuff;
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String [] splittedHeader; |
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header= readHeader(information); |
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headerWithoutStuff = header.trim().replaceAll("\\s+", " "); |
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splittedHeader = headerWithoutStuff.split("\\s+");
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translateHeader(splittedHeader); |
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if (msgType == MessageType.CHUNK)
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this.body = readBody(information, header.length(), length);
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if(msgType == MessageType.PUTCHUNK)
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this.body = readBody(information, header.length(), length);
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} |
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public Message(MessageType type, String[] args) { |
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this.msgType = type;
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version = args[0];
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senderID = Integer.parseInt(args[1]); |
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fileID = args[2];
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if (type != MessageType.DELETE)
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chunkNo = Integer.parseInt(args[3]); |
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if (type == MessageType.PUTCHUNK) {
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replication = Integer.parseInt(args[4]); |
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} |
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} |
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public Message(MessageType type, String[] args, byte[] information) { |
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this(type, args);
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body = information; |
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} |
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private String readHeader(byte[] information) { |
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ByteArrayInputStream stream;
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BufferedReader reader;
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String header = ""; |
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stream = new ByteArrayInputStream(information); |
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reader = new BufferedReader(new InputStreamReader(stream)); |
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try {
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header = reader.readLine(); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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return header;
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} |
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private byte[] readBody(byte[] information, int headerLength, int informationLength) { |
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int readBytes;
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ByteArrayInputStream message;
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byte[] bodyContent; |
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readBytes = informationLength - headerLength - 4;
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message = new ByteArrayInputStream(information, headerLength + 4, readBytes); |
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bodyContent = new byte[readBytes]; |
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message.read(bodyContent, 0, readBytes);
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return bodyContent;
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} |
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private void translateHeader(String[] headerSplit) { |
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switch (headerSplit[0]) { |
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case "PUTCHUNK": |
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{
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msgType = MessageType.PUTCHUNK; |
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argsNo = 6;
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} break;
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case "STORED": |
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{
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msgType = MessageType.STORED; |
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argsNo = 5;
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} |
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break;
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case "GETCHUNK": |
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{
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msgType = MessageType.GETCHUNK; |
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argsNo = 5;
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} break;
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case "CHUNK": |
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{ msgType = MessageType.CHUNK;
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argsNo = 5;
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} break;
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case "DELETE": |
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{
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msgType = MessageType.DELETE; |
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argsNo = 4;
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} break;
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case "REMOVED": |
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{
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msgType = MessageType.REMOVED; |
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argsNo = 5;
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} break;
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default:
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return;
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} |
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if (headerSplit.length != argsNo)
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return;
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version = headerSplit[1];
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senderID = Integer.parseInt(headerSplit[2]); |
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fileID = headerSplit[3];
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if (argsNo > 4) |
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chunkNo = Integer.parseInt(headerSplit[4]); |
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if (msgType == MessageType.PUTCHUNK)
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replication = Integer.parseInt(headerSplit[5]); |
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} |
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public String headerString() { |
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String string;
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if(msgType == MessageType.PUTCHUNK)
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string = msgType + " " + version + " " + senderID + " " + fileID + " " + chunkNo + " " + replication + " " + Utils.CRLF + Utils.CRLF; |
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else if(msgType == MessageType.DELETE) |
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string = msgType + " " + version + " " + senderID + " " + fileID + " " + Utils.CRLF + Utils.CRLF; |
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else
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string = msgType + " " + version + " " + senderID + " " + fileID + " " + chunkNo + " " + Utils.CRLF + Utils.CRLF; |
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return string;
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} |
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public byte[] getBytes() throws IOException { |
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byte header[]; |
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header = headerString().getBytes(); |
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if (body == null) |
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return header;
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else {
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ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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out.write(header); |
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out.write(body); |
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return out.toByteArray();
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} |
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} |
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@Override
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public String toString() { |
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String str;
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if(msgType == MessageType.PUTCHUNK)
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{
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str = "<" + msgType +">" + " " + "<" + version+">" + " " + "<" + senderID+">" + " " +"<" + fileID+">" + " " + "<" +chunkNo+">"; |
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} |
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else if(msgType == MessageType.DELETE) |
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{
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str = "<" + msgType +">" + " " + "<" + version+">" + " " + "<" + senderID+">" + " " +"<" + fileID+">"; |
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} |
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else
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{
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str = "<" + msgType +">" + " " + "<" + version+">" + " " + "<" + senderID+">" + " " +"<" + fileID+">" + " " + "<" +chunkNo+">"; |
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} |
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return str;
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} |
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// Getters and Setters
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public String getVersion() { |
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return version;
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} |
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public int getSenderID() { |
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return senderID;
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} |
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public String getFileID() { |
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return fileID;
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} |
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public int getChunkNo() { |
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return chunkNo;
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} |
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public int getReplicationDegree() { |
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return replication;
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} |
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public byte[] getBody() { |
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return body;
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} |
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public MessageType getType() {
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return msgType;
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} |
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public int getArgsNo() { |
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return argsNo;
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} |
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public int getReplication() { |
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return replication;
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} |
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public MessageType getMsgType() {
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return msgType;
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} |
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public void setArgsNo(int argsNo) { |
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this.argsNo = argsNo;
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} |
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public void setChunkNo(int chunkNo) { |
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this.chunkNo = chunkNo;
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} |
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public void setSenderID(int senderID) { |
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this.senderID = senderID;
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} |
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public void setFileID(String fileID) { |
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this.fileID = fileID;
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} |
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public void setVersion(String version) { |
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this.version = version;
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} |
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public void setReplication(int replication) { |
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this.replication = replication;
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} |
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public void setMsgType(MessageType msgType) { |
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this.msgType = msgType;
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} |
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public void setBody(byte[] body) { |
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this.body = body;
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} |
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} |