package servidorudp;

/**
 *
 * @author Diogo
 */
public class ServidorUDP {

    private static final String USERNAME="root";
    private static final String PASSWORD="";
    private static final String CONN_STRING=""; //Colocar aqui a BD

    public static void main(String[] args)throws Exception {

        //cria o socket UDP
        DatagramSocket serverSocket = new DatagramSocket(9876);

        //cria 2 buffers de bytes, um de receção outro de envio
        byte[] receiveData = new byte[1024];
        byte[] sendData = new byte[1024];

        //cria datagrama para recepção no buffer receiveData
        DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData, lenght);

        //Faz a recepção do datagrama, fica bloqueado à espera de uma mensagem
        serverSocket.receive(receivePacket);
        int receivedLength = receivedPacket.getLength();

        //Envia um Ok a confirmar a recepção
        String senMsg = "Ok";
        sendData = sendMsg.getBytes();
        DatagramPacket sendPacket = new DatagramPacket(sendData,sendMsg.length(),IPAddress,port);

        //envia informação recebida
        severSocket.send(sendPacket);
        System.out.println("SEND MESSAGE = "+ sentenceReceived + "; Length:"+ receivedLength + "\n" );
    }

    public int[] converToInt(byte[] buffer, int length){
        int [] bufferInt = new int[length];
        for(int i = 0; i<length; i++){
        bufferInt[i] = (int)buffer[i]&0xFF;
    }
    return bufferInt;

    //coloca os ultimos bytes recebidos em inteiros
    int[] receiveDataInt;
    int value;
    receiveDataInt = server.convertToInt(receiveData, receivedLength);
    //calcula o valor recebido
    value = receivedDataInt[receivedLength-1]*256+receivedDataInt[receivedLength-2];

    public void insertValue(double value)
    {
        Connection conn = null;
        try{
            conn = DriverManager.getConnection(CONN_STRING,USERNAME,PASSWORD);
            System.out.println("Connecteed!!");

            Statement stmt = (Statement) conn.creatStatement();
            String insert = "INSERT INTO valores(value)" + "VALUES ("+value+")";
            stmt.executeUpDate(insert);
        }catch(SQLException e)
            System.err.println(e);
            }
    }