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Chart creation

Posted on 2011-03-03
13
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Last Modified: 2012-05-11
Please help to find mistake into the code.
I other case it works perfect, but now I have NPE.
Maybe I see at this code too much and blind mistake.
Please advice
 
public SelectData() throws SQLException, ClassNotFoundException,
                               IllegalAccessException, InstantiationException,
                               FieldNotFound, NotDefinedException, Exception {

        conn = new LionFXConnect();
        aConverter = new ArrayConverter();
    }

    public void run() {
        
//      System.out.println(new java.util.Date() + "        SelectData");
        
        try {
            ResultSet rs =
                conn.select("SELECT * FROM RBF_DATA_60 where timest = ( select max( timest ) from RBF_DATA_60 ) and rownum = 1");

            while (rs.next()) {

                outY[0] = rs.getDouble("OUTY0");
........;
                equals(rs);
                System.out.println("SD1    = " + outY[0]);
                aConverter.arrayConverter(outY);
                System.out.println("SD2    = " + outY[0]);
                ChartCommander.getInstance().chartEURUSD(avg , outY);
              System.out.println("SD3    = " + outY[0]);
                
            }
            rs.close();

        } catch (Exception ex) {
            Logger.getLogger(SelectData.class.getName()).log(Level.SEVERE,
                                                             null, ex);
        }

    }
}

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try {

                if ("EUR/USD".equalsIgnoreCase(symbol.trim())) {
                    
                    BorderControl.getInstance().borderControl(bidPx,
                                                              askPx);
                    bidPx[0] = bPx;
                    eurusd_bid = String.valueOf(bidPx[0]);
                    DCC.getInstance().setEURUSD_bid(eurusd_bid);
                    askPx[0] = aPx;
                    eurusd_ask = String.valueOf(askPx[0]);
                    DCC.getInstance().setEURUSD_ask(eurusd_ask);
                    avg[0] = (bidPx[0] + askPx[0])/2;
                    ChartCommander.getInstance().chartEURUSD(avg, outY);
                }

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public class ChartCommander {

    AlgochartEURUSD acEURUSD;

    private static ChartCommander instance = new ChartCommander();

    public static ChartCommander getInstance() {
        return instance;
    }

    public ChartCommander() {

        acEURUSD = new AlgochartEURUSD();
    }

    public void chartEURUSD(double[] avg, double[] outY) {

              if (avg[0] != 0 || outY[0] != 0){
                  
                System.out.println("CC    = " + outY[0]);

        acEURUSD.doEvent(avg, outY);
              }
    }
}

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SD1    = 0.0123864515
SD2    = 0.0123864515
03.03.2011 23:57:47 connect.SelectData run
SEVERE: null
java.lang.NullPointerException
	at charts.ChartCommander.chartEURUSD(ChartCommander.java:21)
	at connect.SelectData.run(SelectData.java:71)
	at java.util.TimerThread.mainLoop(Timer.java:512)
	at java.util.TimerThread.run(Timer.java:462)

Open in new window

at charts.ChartCommander.chartEURUSD(ChartCommander.java:21)=>              if (avg[0] != 0 || outY[0] != 0){
0
Comment
Question by:gbcbr
  • 7
  • 5
13 Comments
 
LVL 92

Expert Comment

by:objects
ID: 35032005
avg appears to e null, make sure you are setting it correctly (or test for null)
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 35032011
>>ChartCommander.getInstance().chartEURUSD(avg , outY);

Where is 'avg' initialized?
0
 

Author Comment

by:gbcbr
ID: 35032068
It's initialized into PMDS class which has to forward it to this chart:
public class PMDS {

    DecisionCenterControl dcc;
    IGateway mFxcmGateway;
    MarketDataSnapshot incomingQuote;
    ITransportable message;

    public PMDS() {
        this.mFxcmGateway = DBFXConnect.getGateway();
        incomingQuote = (MarketDataSnapshot)message;
    }

    String symbol;
    double[] bidPx = new double[10];
    double[] askPx = new double[10];
    double[] avg = new double[10];
    double[] outY;
    ..............
                    avg[0] = (bidPx[0] + askPx[0])/2;
                    ChartCommander.getInstance().chartEURUSD(avg, outY);
                }

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0
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LVL 92

Expert Comment

by:objects
ID: 35032091
you also need to initialise it for your run() method (in the first snippet)
thats whats causing the NPE
0
 
LVL 92

Expert Comment

by:objects
ID: 35032102
               System.out.println("SD1    = " + outY[0]);
                aConverter.arrayConverter(outY);
                System.out.println("SD2    = " + outY[0]);
                ChartCommander.getInstance().chartEURUSD(avg , outY);    <---- its null here
0
 

Author Comment

by:gbcbr
ID: 35032124
I see that is null, but it's initialized into SelectData class also
public class SelectData extends TimerTask {

    private LionFXConnect conn;
    ArrayConverter aConverter;
    double outY[] = new double[10];
    double[] avg;
    String sql;

    /**
     * @throws SQLException
     * @throws ClassNotFoundException
     * @throws IllegalAccessException
     * @throws InstantiationException
     * @throws NotDefinedException
     * @throws FieldNotFound
     * @throws Exception
     */
    public SelectData() throws SQLException, ClassNotFoundException,
                               IllegalAccessException, InstantiationException,
                               FieldNotFound, NotDefinedException, Exception {

        conn = new LionFXConnect();
        aConverter = new ArrayConverter();
    }

    public void run() {
        
//      System.out.println(new java.util.Date() + "        SelectData");
        
        try {
            ResultSet rs =
                conn.select("SELECT * FROM RBF_DATA_60 where timest = ( select max( timest ) from RBF_DATA_60 ) and rownum = 1");

            while (rs.next()) {

                outY[0] = rs.getDouble("OUTY0");
                outY[1] = rs.getDouble("OUTY1");
                outY[2] = rs.getDouble("OUTY2");
                outY[3] = rs.getDouble("OUTY3");
                outY[4] = rs.getDouble("OUTY4");
                outY[5] = rs.getDouble("OUTY5");
                outY[6] = rs.getDouble("OUTY6");
                outY[7] = rs.getDouble("OUTY7");
                outY[8] = rs.getDouble("OUTY8");
                outY[9] = rs.getDouble("OUTY9");

//                System.out.println(new java.util.Date() +
//                                   " ###################### SD   outY[0]   " + outY[0] + "     outY[1]   " + outY[1]);
                equals(rs);
                System.out.println("SD1    = " + outY[0]);
                aConverter.arrayConverter(outY);
                System.out.println("SD2    = " + outY[0]);
                ChartCommander.getInstance().chartEURUSD(avg , outY);
              System.out.println("SD3    = " + outY[0]);

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0
 
LVL 92

Expert Comment

by:objects
ID: 35032141
>     double[] avg;


should be:


    double[] avg = new double[10];
0
 

Author Comment

by:gbcbr
ID: 35032147
now I'm not zero level, I'm already 0.001 level, so, I can understand some things:-)
0
 

Author Comment

by:gbcbr
ID: 35032162
but I don't create new avg in this class, just declare.
please explain why I have to create new avg here.
0
 
LVL 92

Accepted Solution

by:
objects earned 500 total points
ID: 35032196
double[] avg;

is the same as:

double[] avg = null;

you need to define the actual array that avg references
0
 
LVL 92

Expert Comment

by:objects
ID: 35032210
Same as you did in the PMDS class (the two are entirely seperate variables/arrays, they just have the same name)
0
 

Author Comment

by:gbcbr
ID: 35032282
Now it's ok with avg but appear problem with outY.
But it's initialized into SelectData
public class SelectData extends TimerTask {

    private LionFXConnect conn;
    ArrayConverter aConverter;
    double outY[] = new double[10];
    double[] avg = new double[10];
    String sql;

    /**
     * @throws SQLException
     * @throws ClassNotFoundException
     * @throws IllegalAccessException
     * @throws InstantiationException
     * @throws NotDefinedException
     * @throws FieldNotFound
     * @throws Exception
     */
    public SelectData() throws SQLException, ClassNotFoundException,
                               IllegalAccessException, InstantiationException,
                               FieldNotFound, NotDefinedException, Exception {

        conn = new LionFXConnect();
        aConverter = new ArrayConverter();
    }

    public void run() {
        
//      System.out.println(new java.util.Date() + "        SelectData");
        
        try {
            ResultSet rs =
                conn.select("SELECT * FROM RBF_DATA_60 where timest = ( select max( timest ) from RBF_DATA_60 ) and rownum = 1");

            while (rs.next()) {

                outY[0] = rs.getDouble("OUTY0");
                outY[1] = rs.getDouble("OUTY1");
                outY[2] = rs.getDouble("OUTY2");
                outY[3] = rs.getDouble("OUTY3");
                outY[4] = rs.getDouble("OUTY4");
                outY[5] = rs.getDouble("OUTY5");
                outY[6] = rs.getDouble("OUTY6");
                outY[7] = rs.getDouble("OUTY7");
                outY[8] = rs.getDouble("OUTY8");
                outY[9] = rs.getDouble("OUTY9");

//                System.out.println(new java.util.Date() +
//                                   " ###################### SD   outY[0]   " + outY[0] + "     outY[1]   " + outY[1]);
                equals(rs);
                System.out.println("SD1    = " + outY[0]);
                aConverter.arrayConverter(outY);
                System.out.println("SD2    = " + outY[0]);
                ChartCommander.getInstance().chartEURUSD(avg , outY);
              System.out.println("SD3    = " + outY[0]);

Open in new window

SD1    = 0.038359333
SD2    = 0.038359333
SD3    = 0.038359333
SD1    = 0.038359333
SD2    = 0.038359333
SD3    = 0.038359333
04.03.2011 0:55:02 connect.PMDS parseMarketDataSnapshot
SEVERE: null
java.lang.NullPointerException
	at charts.AlgochartEURUSD.doEvent(AlgochartEURUSD.java:47)
	at charts.ChartCommander.chartEURUSD(ChartCommander.java:25)
	at connect.PMDS.parseMarketDataSnapshot(PMDS.java:89)
	at connect.DBFXConnect$1.messageArrived(DBFXConnect.java:133)
	at com.fxcm.internal.transport.FXCMGateway.update(FXCMGateway.java:828)
	at com.fxcm.messaging.util.fix.FIXUserSession$BackToUserQueue.run(FIXUserSession.java:675)
	at java.lang.Thread.run(Thread.java:680)

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at charts.AlgochartEURUSD.doEvent(AlgochartEURUSD.java:47)=>  s2.addOrUpdate(new FixedMillisecond(new Date().getTime() + 5000), new Float(outX[0]));
0
 
LVL 92

Expert Comment

by:objects
ID: 35032298
thats a different problem, open a new q and I'll have a look at it for you
0

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