FixedLengthTooShortHandling problem

Hi All,
I have configured a file to file scenario with File Content Conversion.
I have a structure with 2 fields. The first field has fixed length of 2 bytes but the second field is variable. It is not a CSV file. I have used the following configuration
Structure.fieldNames = Key,Company_Code_Record
Structure.fieldFixedLengths = 2,10
Structure.fixedLengthTooShortHandling = Ignore
The problem arrives when the second field exceeds 10 characters. The above configuration shortens the second field to 10 characters only.
I also tried using Structure.fixedLengthTooShortHandling = Cut. but I get the same result as in case of Structure.fixedLengthTooShortHandling = Ignore.
Kindly Suggest,
Charu.

HI Charulata,
try adding these parameters:
Structure.fieldFixedLenghts 0
Structure.fixedLengthTooShortHandling cut
also check for case sensitivity.
Hope this shuld resolve the issue.
Thanks,
Ravi.

Similar Messages

FIle Content Conversion Problem in IDOC-XI-File Scenario

Dear All,
I am doing IDOC-XI-FILE scenario.
I am facing one problem related to File Content Coversion.My requirement was to generate a dynamic file like <b>%store_code%_%current_date%_sitemaster.xml</b> , I have completed the dynamic generation successfully .
Now there is slight change in the requirement ,<b>we have to suppress the current_date node of the xml content</b> . i have tried to suppress the current_date using these <b>DATE.fieldFixedLengths 0 , Date.fixedLengthTooShortHandling Cut</b> , But I am unable to suppress it Can some body provide me the details on this .
The output xml version generated by Reciever file adapter is as below :
<?xml version="1.0" encoding="UTF-8" ?>
- <ns0:MT_SITE_MASTER xmlns:ns0="http://sample-xitest.com/sitemaster">
- <SITE_DATA>
<STORE_CODE>N002</STORE_CODE>
<TITLE_MEDI>Company</TITLE_MEDI>
<STORE_NAME>Mount Road</STORE_NAME>
<STREET>Chennai</STREET>
<COUNTRY>IN</COUNTRY>
<SALES_TAX_NO>12345678910</SALES_TAX_NO>
</SITE_DATA>
</ns0:MT_SITE_MASTER>
Plz provide me the code I have to write in the file content conversion .
Thanks in advance
Regards
Prabhat

If u see my earlier reply, I mentioned that u can not suppress the field from the one node.i.e Form SITE_DATA data type u can not suppress the field called CURRENT_DATE.
My suggestion is that , modify the Data type in such a way that you will be having two nodes as I have mentioned earlier. Then use the Suppress Logic for the Current Date.
So it will look like this-
<?xml version="1.0" encoding="UTF-8" ?>
- <ns0:MT_SITE_MASTER xmlns:ns0="http://sample-xitest.com/sitemaster">
- <SITE_DATA>
<STORE_CODE>N002</STORE_CODE>
<TITLE_MEDI>Company</TITLE_MEDI>
<STORE_NAME>Mount Road</STORE_NAME>
<STREET>Chennai</STREET>
<COUNTRY>IN</COUNTRY>
<SALES_TAX_NO>12345678910</SALES_TAX_NO>
</SITE_DATA>
<CURR_DATE>
<CURRENT_DATE>20051105</CURRENT_DATE>
</CURR_DATE>
</ns0:MT_SITE_MASTER>
So ur SITE_DATA is not having a field called CURRENT_DATE. This field is in separate node (segment ) called CURR_DATE. Now u can use the Suppress Logic for the same like this.
CURR_DATE.fieldFixedLengths - 0
CURR_DATE.fixedLengthTooShortHanling - Cut
And in your Variable Substitution you can use the date from the other segment called CURR_DATE.
Hope this solves ur problem.
Regards,
Moorthy

Problem with fixedlenthgs in receiver file adapter

HI,
I am doing XML to flat file scenario and using mutli mapping concept without BPM.
in the receiver file adapter I am using FCC with fixedlengths,then it generated just 3 output files out of nearly 100 source files.the errored one are succcessful in the SXMB_MONI and failing in RWB-->Message moni with waiting status and MDT says that XI_J2EE_ADAPTER_FILE ,Error Code PROCESSING_ERROR .
i tried in SDN and then found something like enable the disablesecurity check box in variable substitution parameters ,then I got 4 files out.
these are my FCC params for all structures:
struc1.fieldFixedLengths
struc1.fixedLengthTooShortHandling
struc1.endSeparator
and I tried with fieldSeparator then it gives successfully all output files.
so,where is the problem?I didnt understand?
any suggestion.
thank you,
regards,
Babu Sri

Bhavesh,
I felt the same way,but assumed that ,in that way fixedlenghths wont work.
in my target structure most of the fields have 0-1 occurences ,and even in the source structure too.so,I think it might be the reason.Then I have to make all my about 60fields 1-1 madatory and using mapWithDefaultValue function, as my sources are optional.
you think it will work just using the "mapWithDefaultValue" function without changing my occurences to 1-1 in the target structure(mandatory)?infact I can try but ,cos of pain for changing like 60 fields....:) and even dont know which fields are causing the problem,so that we can apply "mapWithDefaultValue" function only on those fields.
thank you,
Babu Sri

Trailing spaces problem during file content conversion

I have developed a proxy to file scenario.And am using file content conversion for creating the file. The file is to be a fixed length file.
File Structure
<Header>
<Item>
<Item Trailer>
<File Trailer>
Each tab in the file has the last character mapped to spaces.
Eg: Header00000001 2006011700000000020060<blank   space>
Item00000001        2006011700000000020060<blank   space>
The problem is that during file content conversion. XI does not preserve trailing spaces at the end of the line i.e.if a particular line in the file ends with space. It terminates the line at the last non-space character (in this case at 060).
However we are required to maintain these trailing spaces at the end of each line.
I have tried preserve white space in data type that does not work.
I know that xslt mapping may solve the problem but I am looking for a workaround with my current graphical mapping.
Looking for suggestions !!
Thanks,
Rashida

Hi,
I have the problem quite opposite to this where we are getting the trailing spaces at end of each record which should not come.
File structure is
<Record>
- <Data>
<Content>11/09/2007@210@ZACSL007@GBB-56436@PS01@29@1044@19@646@0</Content>
</Data>
</Record>
............. n records
<Header>
<File_Name>UK01</File_Name>
</Header>
Record structure in communication channel used is
Header, Data
Data.fieldFixedLengths     1024
Data.addHeaderLine     0
Header.addHeaderLine     0
Header.fieldFixedLengths     0
Header.fixedLengthTooShortHandling     Cut
Data.fixedLengthTooShortHandling     Cut
Header.endSeparator     '0'
Actually if the length of record is less than 1024, rest of the length is being filled with spaces which should not occur.
Many advanced thanks.
Jitender

Problem in Receiver File adapter :Module XML2PLAIN

Hi Friends,
I have a FILE -> FILE scenario ,In this when I am downloading the data in XML format it is getting downloaded successfully.The output look like this ...
<b>I have only one field to be displayed in the output</b>.
<?xml version="1.0" encoding="utf-8" ?>
<Returnkey>
<field1>000000000621185CA</field1>
</Returnkey>
Module Name                                                      Modulekey
localejbs/AF_Modules/MessageTransformBean      XML2Plain
<b>Module key parametername                      parameter value</b>
XML2Plain      Transform.Class            com.sap.aii.messaging.adapter.Conversion
XML2Plain      Transform.ContentType   text/plain;charset=utf-8
XML2Plain      xml.addHeaderLine         0
XML2Plain      xml.conversionType       SimpleXML2Plain
XML2Plain      xml.fieldFixedLengths    25
Please some one help me out I,I have tried all the options and I cant use File content conversion in this case ,(I have JMS adapter which actually sends this information to MQ,as it is working in XML format AND not in plain format ,I am testing this temporarily with a receiver file scenario)
Thanks in advance.

Hi
you can use the following modules and the parameters.
Processing sequence :
localejbs/AF_Modules/MessageTransformBean
localejbs/SAP XI JMS Adapter/ConvertMessageToBinary
localejbs/SAP XI JMS Adapter/SendBinarytoXIJMSService
Module Configuration:
Transform.Class----
>com.sap.aii.messaging.adapter.Conversion
TransformContentType----
>text/plain;charset=utf-8
xml.addHeaderLine----
>0
xml.conversionType----
>SimpleXML2Plain
xml.fieldFixedLengths----
>10,10,10(for ex)
xml.fixedLengthTooShortHandling----
>Cut
if you still face the problem please reply me back.
Thanks
Rinku

FCC: Problems with content conversion

Dear all,
I have a receiver FTP adapter with content conversion. In RWB I'm facing following error message:
Adapter Framework caught exception: Exception in XML Parser (format problem?):'java.lang.Exception: Message processing failed in XML parser: 'java.lang.Exception: Consistency error: more fields found in XML structure than specified in conversion parameters! (Value 'FCOTUPI')', probably configuration error in file adapter (XML parser error)'
The field with value FCOTUPI could be found in POS recordset. I double check the length of columns but couldn't find
an error.
CC configuration:
Recordset structure: HEADER,POS,SUBPOS
HEADER.fieldFixedLengths = 8,4,8
POS.fieldFixedLengths = 8,20,15,3
SUBPOS.fieldFixedLengths = 5,5
HEADER.fixedLengthTooShortHandling = Cut
POS.fixedLengthTooShortHandling = Cut
SUBPOS.fixedLengthTooShortHandling = Cut
As you can see by the names, I am using as XML to convert a structure with subnodes. In documentation it said
that it is not allowed, but in some threads I found the information that structure could be processed.
Any ideas how to solve this problem?
Thanks
Chris

Dear Amit,
thanks for your answer. I already checked this blog, but hoped for other solutions.
My problem: I tried to map my hierarchical structure to a flat structure.
Source
Struc1 (0..unbounded)
-Item1.1
-Struc2 (0..unbounded)
--Item 2.1
--Struc3 (0..unbounded)
---Item3.1
Target:
Struc1 (0..unbounded)
-Item1.1
Struc2 (0..unbounded)
-Item 2.1
Struc3 (0..unbounded)
-Item3.1
But if e.g. the Struc2 appears two time it will be created two time in target structure before
the Struc3 is created. But ths Struc3 belongs to Struc2 and should be created in flat file under
Struc2 directly.
How can we created a flat structure like this
Struc1
Struc2
Struc3
Struc3
Struc2
Struc3
Thanks
Chris

Problem in FCC

hi guys,
im having a problem using FCC in reciever file adapter.
in receive an XML like this:
header
....details
....details
....details
header
....details
....details
....details
header
taking reference of this blogs i traying to do my conversion
/people/arpit.seth/blog/2005/06/02/file-receiver-with-content-conversion
/people/shabarish.vijayakumar/blog/2007/08/03/file-adapter-receiver--are-we-really-sure-about-the-concepts
the diference between the blogs and my case refer i don have field separator y use <xml>.fieldFixedLengths
my conversion is next:
Recordset Structure: Header,Details
Details.beginSeparator.........'nl'
Details.fieldFixedLengths........1,10,10,50,16,13,5,15,15,15,15
Details.fixedLengthTooShortHandling.......Cut
Details.endSeparator............'nl'
Header.fieldFixedLengths............1,4,10,4,8,35,16,18,5,5
Header.endSeparator...............'nl'
ussing this Conversion im getting next error:
Message processing failed. Cause: com.sap.aii.af.ra.ms.api.RecoverableException: Exception in XML Parser (format problem?):'java.lang.Exception: Message processing failed in XML parser: 'java.lang.Exception: Consistency error: more fields found in XML structure than specified in conversion parameters! (Value '123456789 ')', probably configuration error in file adapter (XML parser error)': java.lang.Exception: Exception in XML Parser (format problem?):'java.lang.Exception: Message processing failed in XML parser: 'java.lang.Exception: Consistency error: more fields found in XML structure than specified in conversion parameters! (Value '123456789 ')', probably configuration error in file adapter (XML parser error)'
now, ussing the same conversion but changging the result structure to
header
header
header
details
details
details
details
i dont have any error in conversion. my question is Why?? what wrong in first case??? the error say: more fields found in XML structure than specified in conversion parameters but the numbers of field defined is right because in the second case it works.
Thanks,
Rodrigo

i try ussing field names too but i get the same error. i cannot remove context the structure i must generate is:
header
...detail
...detail
header
...detail
...detail
...detail
another thing i facing. if i repace the <xml>fieldFixedLengths for <xml>fieldSeparator no error and the result file is i am specting but with a field separator wich shouldnt be. i tryed use:
header.fieldSeparator .......# '0x08' (backspace) but the result structure is
field1#
field2#
field3#
its putting and enter and no a backspace.
Edited by: Rodrigo Pertierra on Jun 18, 2008 12:47 PM

Adapter file Receive - conversion file problem

Hi everybody,
In an adapter file receiver, I want to convert an XML structure to a "flat file".
here is my xml structure
<ns1:MT006_blabka>
<RECORD>
    <LIGNE>TEST1</LIGNE>
    <LIGNE>TEST2</LIGNE>
</RECORD>
<FILE>
     <FILENAME>fichier.dat</FILENAME>
     <DIRECTORY>//server1/root/</DIRECTORY>
   </FILE>
</ns1:MT006_blabla>
and the text file I want to receive is
<BOF>
TEST1
TEST2
<EOF>
The problem is with the paramter of conversion I use I receive
<BOF>
TEST1
TEST2
<EOF>
I always receive an empty line at the end
The record set define in conversion are "RECORD,FILE"
in parameter i put
RECORD.fieldSeparator      value : 'nl'
FILE.fieldFixedlengths value : 0,0
My problem is to eliminate the empty line at the end of the file.
Is there someone who can help me ?
Thank you in advance for your collaboration.
Regards
Eric.

Hi,
You will have to modify your target structure from this
<ns1:MT006_blabka>
<RECORD>
<LIGNE>TEST1</LIGNE>
<LIGNE>TEST2</LIGNE>
</RECORD>
<FILE>
<FILENAME>fichier.dat</FILENAME>
<DIRECTORY>//server1/root/</DIRECTORY>
</FILE>
</ns1:MT006_blabla>
To this
<ns1:MT006_blabka>
<RECORD>
<Struct>
      <LIGNE>TEST1</LIGNE>
       <LIGNE>TEST2</LIGNE>
</Struct>
</RECORD>
<FILE>
<FILENAME>fichier.dat</FILENAME>
<DIRECTORY>//server1/root/</DIRECTORY>
</FILE>
</ns1:MT006_blabla>
use the content conversion as
recordset structure = RECORD,Struct,File,
Record.fieldSeparator = 'nl'
Struct.fieldSeparator = 'nl'
file.fieldFixedLengths = 0
file.fixedLengthTooShortHandling = Cut

FTP-FTP scenario...problem with FCC

Hi,
Iam doing a FTP to FTP scenario.I have specified the following parameters-
source.fieldNames
source.fieldSeparator -> ;
source.endSeparator ->'nl'
ignoreRecordsetName
source.fieldContentFormatting->nothing
source.missingLastfields->add
Target.fieldFixedLengths
Target.fixedLengthTooShortHandling ->Cut
Target.fieldSeparator -> ;
Target.endSeparator ->'nl'
There are 2 fields in source file that has blank values,so the source file is like
In the target file, the fields upto those fields with blank values are coming...but fields from those blank values are missing.so the output file looks like this.
The fields with blank values has lengths 50,50.
I want all the fields in output file .Every thing is direct mapping.
Please suggest something that will do this.Its urgent.

HI,
From sender side if you get blank value then that particular node will not be generated on target side XML structure in mapping. and you have used Target.fixedLengthTooShortHandling ->Cut so the further fields are not considerd properly.
Can you plesae add mapWithDefault api while mapping. Double click on it and pass blank value. This will create the Blank node on target side.
Source --> mapWithDefault ( [] ) --> Target
i hope this will solve your problem
Thanks
Swarup

A problem with threads

I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
Lefty

This was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
     boolean active = true;
     public void run(){
          ss.setSoTimeout(90);
          while (active){
               try{
                    serverSocket = ss.accept();
               catch (SocketTimeoutException ste){
               // do nothing
     // interrupt thread
     public void deactivate(){
          active = false;
          // you gotta sleep for a time longer than the
          // accept() timeout to make sure that timeout is finished.
          try{
               sleep(91);
          }catch (InterruptedException ie){
          interrupt();
}

A problem with Threads and MMapi

I am tring to execute a class based on Game canvas.
The problem begin when I try to Play both a MIDI tone and to run an infinit Thread loop.
The MIDI tone "Stammers".
How to over come the problem?
Thanks in advance
Kobi
See Code example below:
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
public class MainScreenCanvas extends GameCanvas implements Runnable {
     private MainMIDlet parent;
     private boolean mTrucking = false;
     Image imgBackgound = null;
     int imgBackgoundX = 0, imgBackgoundY = 0;
     Player player;
     public MainScreenCanvas(MainMIDlet parent)
          super(true);
          this.parent = parent;
          try
               imgBackgound = Image.createImage("/images/area03_bkg0.png");
               imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
               imgBackgoundY = this.getHeight() - imgBackgound.getHeight();
          catch(Exception e)
               System.out.println(e.getMessage());
      * starts thread
     public void start()
          mTrucking = true;
          Thread t = new Thread(this);
          t.start();
      * stops thread
     public void stop()
          mTrucking = false;
     public void play()
          try
               InputStream is = getClass().getResourceAsStream("/sounds/scale.mid");
               player = Manager.createPlayer(is, "audio/midi");
               player.setLoopCount(-1);
               player.prefetch();
               player.start();
          catch(Exception e)
               System.out.println(e.getMessage());
     public void run()
          Graphics g = getGraphics();
          play();
          while (true)
               tick();
               input();
               render(g);
      * responsible for object movements
     private void tick()
      * response to key input
     private void input()
          int keyStates = getKeyStates();
          if ((keyStates & LEFT_PRESSED) != 0)
               imgBackgoundX++;
               if (imgBackgoundX > 0)
                    imgBackgoundX = 0;
          if ((keyStates & RIGHT_PRESSED) != 0)
               imgBackgoundX--;
               if (imgBackgoundX < this.getWidth() - imgBackgound.getWidth())
                    imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
      * Responsible for the drawing
      * @param g
     private void render(Graphics g)
          g.drawImage(imgBackgound, imgBackgoundX, imgBackgoundY, Graphics.TOP | Graphics.LEFT);
          this.flushGraphics();
}

You can also try to provide a greater Priority to your player thread so that it gains the CPU time when ever it needs it and don't harm the playback.
However a loop in a Thread and that to an infinite loop is one kind of very bad programming, 'cuz the loop eats up most of your CPU time which in turn adds up more delays of the execution of other tasks (just as in your case it is the playback). By witting codes bit efficiently and planning out the architectural execution flow of the app before start writing the code helps solve these kind of issues.
You can go through [this simple tutorial|http://oreilly.com/catalog/expjava/excerpt/index.html] about Basics of Java and Threads to know more about threads.
Regds,
SD
N.B. And yes there are more articles and tutorials available but much of them targets the Java SE / EE, but if you want to read them here is [another great one straight from SUN|http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html] .
Edited by: find_suvro@SDN on 7 Nov, 2008 12:00 PM

J2ME problem with threads

Hi all,
I would like to ask you for a help. I need to write a small program at my university. I started to write a midlet which function would be to countdown time for sports activities. I woul like to start a new thread - the one that counts down - and at the same time make the main thread sleep. After the "countdown" thread finishes, the main thread wakes up and waits for user input. The problem is that when the "countdown" thread finishes his work, I've got Uncaught exception java/lang/NullPointerException. error and the midlet halts.
Below you can find the code
import java.lang.*;
import java.util.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class intervals extends MIDlet implements CommandListener
public Display ekran;
private SweepCanvas sweeper;
private Form rundy;
private TextField round0, round1, round2, round3, round4, round5, round6, round7, round8;
private long czas,x;
private Command exitCommand;
private Command addRound;
private Command delRound;
private Command start;
private TextField repeat;
private Form odliczanie;
private Alert ostrz;
Licznik thread;
String test;
StringItem test1;
int parz,i,j,k;
static int l;
int ilrund;
int ilpowt;
Item sec;
long sec1;
public intervals()
    rundy = new Form("Interwały sportowe");
    exitCommand = new Command("Wyjście", Command.EXIT, 2);
    addRound = new Command("Dodaj","Dodaj rundę", Command.ITEM,1);
    delRound = new Command("Usuń","Usuń ostatnią rundę", Command.ITEM,1);
    start = new Command("Start", Command.ITEM,1);
    odliczanie = new Form("Odliczanie");
    TextField dodaj(TextField kolej)
        kolej=new TextField("Podaj czas (s) rundy "+parz,null, 4, TextField.NUMERIC);//stworzenie nowej instancji do wybierania czasu trwania rundy
        if(rundy.size()==0)
            rundy.insert(rundy.size(),kolej);
            else
                rundy.insert(rundy.size()-1, kolej);
        return kolej;
    void odliczanie(TextField round)
        monitor m=new monitor();
        k=Integer.parseInt(round.getString());
        ekran.setCurrent(odliczanie);
        thread=new Licznik(k,odliczanie);
        thread.start();
        ekran.setCurrent(rundy);
public void startApp()// throws MIDletStateChangeException
    rundy.deleteAll();
    repeat = new TextField("Podaj ilość powtórzeń",null,1,TextField.NUMERIC);
    rundy.addCommand(addRound);
    rundy.addCommand(exitCommand);
    rundy.setCommandListener(this);
    Canvas obrazek = new MyCanvas();
    ekran = Display.getDisplay(this);
    ekran.setCurrent(obrazek);
    czas=System.currentTimeMillis();
    while (System.currentTimeMillis()<czas+1000)
        continue;
    ekran.setCurrent(rundy);
public void pauseApp()
public void destroyApp(boolean unconditional)
    notifyDestroyed();
public void commandAction(Command c, Displayable s)
    if (c == exitCommand)
        destroyApp(false);
        notifyDestroyed();
    else if(c==addRound)
        if(rundy.size()==0)//Sprawdzenie ilości elementów w celu poprawnego wyświetlania liczby rund w formie
            parz=1;
            else
            parz=rundy.size();
        switch(parz)
            case 1:
                round0=dodaj(round0);break;
            case 2:
                round1=dodaj(round1);break;
            case 3:
               round2= dodaj(round2);break;
            case 4:
                round3=dodaj(round3);break;
            case 5:
                round4=dodaj(round4);break;
            default:
                ostrz=new Alert("Uwaga","Maksymalna liczba rund wynosi 9", null, AlertType.INFO);
                ostrz.setTimeout(3000);
                ekran.setCurrent(ostrz);
        if(rundy.size()==1)
            rundy.append(repeat);
            rundy.addCommand(start);
        rundy.addCommand(delRound);
    else if(c==delRound)
        if(rundy.size()!=0)
            rundy.delete(rundy.size()-2);
            if (rundy.size()==1)
                rundy.deleteAll();
            if(rundy.size()==0)
                rundy.removeCommand(delRound);
                rundy.removeCommand(start);
    else if(c==start)
        ilrund=rundy.size()-1;
        if(this.repeat.size()>0)
            ilpowt=Integer.parseInt(this.repeat.getString());
        ekran = Display.getDisplay(this);
        for (i=1; i<=ilpowt;i++)
            odliczanie= new Form("Odliczanie");
             for (j=0;j<ilrund;j++)
                switch(j)
                     case 0:
                         odliczanie(round0);
                         break;
                     case 1:
                         odliczanie(round1);
                         break;
                     case 2:
                         odliczanie(round2);
                         break;
                     case 3:
                         odliczanie(round3);
                         break;
                     case 4:
                         odliczanie(round4);
                         break;
                     case 5:
                         odliczanie(round5);
                         break;
                     case 6:
                         odliczanie(round6);
                         break;
                     case 7:
                         odliczanie(round7);
                         break;
                     case 8:
                         odliczanie(round8);
                         break;
class Licznik extends Thread
    int czas1,k;
    Form forma;
    monitor m;
    public Licznik(int k,Form formap)
        czas1=k;
        forma=formap;
    public synchronized void run()
        while(czas1>0)
            forma.deleteAll();
            forma.append("Czas pozostały (s): "+czas1);
            try{Thread.sleep(1000);} catch(InterruptedException e){e.printStackTrace();}
            czas1--;
        if(czas1<=0)
            m.put();
    }and monitor class
public class monitor
boolean busy=false;
synchronized void get()
    if(!busy)
        try
            wait();
        }catch(InterruptedException e){e.printStackTrace();}
    notify();
synchronized void put()
    if(busy)
        try
        wait();
        }catch(InterruptedException e){e.printStackTrace();}
    busy=true;
    notify();
}Can anybody help me with this?

Groovemaker,
Your Licznik class has a member m of type monitor, which has not been instantiated (in other words is null) hence, when calling m.put() you get NullPointerException. Please also mind, that using Thread.sleep(1000) is not an accurate way of measuring time.
If I may, please use recommended for Java class naming conventions - some of your names use lower case, while other don't which is confusing to the reader.
Daniel

Problem with threads within applet

Hello,
I got an applet, inside this applet I have a singleton, inside this singleton I have a thread.
this thread is running in endless loop.
he is doing something and go to sleep on and on.
the problem is,
when I refresh my IE6 browser I see more than 1 thread.
for debug matter, I did the following things:
inside the thread, sysout every time he goes to sleep.
sysout in the singleton constructor.
sysout in the singleton destructor.
the output goes like this:
when refresh the page, the singleton constructor loading but not every refresh, sometimes I see the constructor output and sometimes I dont.
The thread inside the singleton is giving me the same output, sometime I see more than one thread at a time and sometimes I dont.
The destructor never works (no output there).
I don't understand what is going on.
someone can please shed some light?
thanks.
btw. I am working with JRE 1.1
this is very old and big applet and I can't convert it to something new.

Ooops. sorry!
I did.
     public void start() {
     public void stop() {
     public void destroy() {
          try {
               resetAll();
               Configuration.closeConnection();
               QuoteItem.closeConnection();
          } finally {
               try {
                    super.finalize();
               } catch (Throwable e) {
                    e.printStackTrace();
     }

Problem with Threads and a static variable

I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
   protected static void Init(){
        objMainProcess = new Thread() {
            public void run() {
                while( objMainProcess == Thread.currentThread() ) {
                   GetState();
        objMainProcess.setDaemon( true );
        objMainProcess.start();
    public static void initStatusTimer(){
        if(objTimer == null)
             objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
                public void actionPerformed( java.awt.event.ActionEvent evt){
                          SetState();
    private static void SetState(){
        if( objMainProcess == null ) return;
        synchronized( objMainProcess ) {
            bChanged = true;
            try{
                objMainProcess.notify();
            }catch( IllegalMonitorStateException e ) {}
    private static boolean GetState() {
        if( objMainProcess == null ) return false;
        synchronized( objMainProcess ) {
            if( bChanged) {
                SendMessage();
                bChanged = false;
                return true;
            try {
                objMainProcess.wait();
            }catch( InterruptedException e ) {}
            return false;
    }

Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D.

Problem with threads running javaw

Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.

troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort      socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
     JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
     System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue;      // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer)      // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
     out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
                         JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
     out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
//     System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
     }catch(Exception a){
     JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run

FixedLengthTooShortHandling problem

Similar Messages

Maybe you are looking for