[Rxtx] Data loss in high ratio while reading event based with SerialPortEvent.DATA_AVAILABLE

[Beyefendi]

Hi, rxtx experts,
I read a serial connected device. As you know, it produce datas in a specified time intervals. In my configration, length of produced data by the device is 10 characters. Such as; it sends one packet (its length 10 characters) to com port by every 1 seconds. I use device's simulator, it reads data correctly and also never misses, namely simulator shows 10 length of new data in every 1 seconds for this example.
On the other hand, i developed an event based java program that uses rxtx 2.1.7, on os winXP, java 1.6 but i cannot get the correct number of packets. What i am missing?
I've been testing with several different configuratin of device, but I always miss packets with different ratios. My last test shows this statistics;Device produces 900 packetsSimulator read 900 packets, this below code that i implemented read 458. Nearly i lost %50 percent?
I can provide more detail to you who concerned with this problem.I want to take your advice.
// I simplified the code to understand easilypublic class SerialOperations implements SerialPortEventListener {
	CommPortIdentifier port;	SerialPort serialPort;	InputStream is;	BufferedReader br;		StringBuffer packet = null;	StringBuffer lackingPacket = new StringBuffer("");		public boolean openSerialPort() {				try {
			port = CommPortIdentifier.getPortIdentifier("COM3");						serialPort = (SerialPort) port.open("Berat", 2000);						serialPort.setSerialPortParams(48000, 					8,	//SerialPort.DATABITS_8,					1,	//SerialPort.STOPBITS_1, 					0);	//SerialPort.PARITY_NONE
			// Run event based			serialPort.addEventListener(this);
			serialPort.notifyOnDataAvailable(true);
			serialPort.setDTR(true);			serialPort.setRTS(true);						serialPort.setFlowControlMode(0); // SerialPort.FLOWCONTROL_NONE
			is = serialPort.getInputStream();			br = new BufferedReader(new InputStreamReader(is),10);			return true;				} catch (Exception e) {			System.out.println(e.getMessage());		}				return false;	}
	@Override	public void serialEvent(SerialPortEvent e) {		if (e.getEventType() == SerialPortEvent.DATA_AVAILABLE) {			readData();		}	}
	public void readData() {				try {						//byte[] buffer = new byte[is.available()];			String buffer;						while (is.available() > 0) {
				//is.read(buffer);				buffer = br.readLine();								packet = new StringBuffer(new String(buffer).trim().replaceAll("\n", ""));								StringBuffer temp = new StringBuffer("Data: " + packet + " length: " + packet.length());				System.out.println(temp);
				if (packet.length() == 10) {	// packet is fetched in one read
					// .. controls ...					DBOperations.parsePacket(packet.toString());														} else if (packet.length() < 10 && packet.length() > 0){ // for is.read(buffer), it cannot read until \n										// .. controls ...											lackingPacket.append(packet);									}else{					System.out.println("Packet is too long or Packet is not correct format");				}
			}					}catch (IOException e) {			System.out.println("Error in readData():  " + e.getMessage());		}			}	}




      
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