T3Client problem...

Hi all,
I disabled the guest login in my wls properties file. So when I run the
following code,
T3Client t3 = new T3Client();
t3.connect();
it throws: java.lang.SecurityException: Authentication for user guest
denied in realm weblogic.
How can I provide a user id and passward for constructing T3Client??
Thanx!
filesdir

T3Client t3 = new T3Client(url, new T3User(name, password));
filesdir <[email protected]> wrote:
Hi all,
I disabled the guest login in my wls properties file. So when I run the
following code,
T3Client t3 = new T3Client();
t3.connect();
it throws: java.lang.SecurityException: Authentication for user guest
denied in realm weblogic.
How can I provide a user id and passward for constructing T3Client??
Thanx!
filesdirDimitri
http://dima.dhs.org

Similar Messages

T3Client problems

I am having trouble with a T3Client timing out. I am running with
Weblogic 51 Sp5.
I have an application that creates a T3Client and then connects to a
ConnectionPool. I have a disconnectListener on this T3Client. I have
set the Idle/Soft/Hard DisconnectTimeOuts to 480. (NEVER doesn't seem
to work at all).
After 5 minutes the T3Client is disconnected and the reason is
"connection to peer went down".
Does anyone have any ideas as to why this is happening?
This is pretty serious because it kills the application.
Milt Grinberg
[email protected]

Idle/Soft/Hard DisconnectTimeOuts are set by your T3Client. However, there
are other timeouts set up OSs of your client machine and server machine. I
doubte the tcp_time_wait_interval of your Solair box (do you use Solairs) is
300 secs. It has been kicked off before the IdleDisconnectTimeOut.
Cheers - Wei
Milt Grinberg <[email protected]> wrote in message
news:[email protected]..
I am having trouble with a T3Client timing out. I am running with
Weblogic 51 Sp5.
I have an application that creates a T3Client and then connects to a
ConnectionPool. I have a disconnectListener on this T3Client. I have
set the Idle/Soft/Hard DisconnectTimeOuts to 480. (NEVER doesn't seem
to work at all).
After 5 minutes the T3Client is disconnected and the reason is
"connection to peer went down".
Does anyone have any ideas as to why this is happening?
This is pretty serious because it kills the application.
Milt Grinberg
[email protected]

T3Client.connect() problem in weblogic 6.1

This is a re-post because I forgot to include my complete email address.
I am having ptoblem with T3Client.connect() in Weblogic 6.1. The method works
well in Weblogic 5.1. Here is the error message:
<Feb 17, 2004 2:13:35 PM EST> <Error> <ConnectionManager> <Closing: 'weblogic.rj
vm.t3.T3JVMConnection@53e51' because of: 'Server received a message over an unin
itialized connection: 'JVMMessage from: 'null' to: '1577296987682531743S:162.70.
250.94:[7001,7001,7002,7002,7001,7002,-1]:ccDomain:scott' cmd: 'CMD_REQUEST',
QO
S: '101', responseId: '1', invokableId: '1', flags: 'JVMIDs Not Sent, TX Context
Not Sent', abbrev offset: '91'''>
<Feb 17, 2004 2:14:35 PM EST> <Error> <HTTP> <[WebAppServletContext(6748107,cc,/
cc)] Servlet failed with Exception
java.rmi.UnexpectedException: Marshalling: ; nested exception is:
java.rmi.ConnectException: PeerGone; nested exception is:
weblogic.rjvm.PeerGoneException: Config message not received after 60
se
conds
java.rmi.ConnectException: PeerGone; nested exception is:
weblogic.rjvm.PeerGoneException: Config message not received after 60
se
conds
weblogic.rjvm.PeerGoneException: Config message not received after 60 seconds
at weblogic.rjvm.RJVMImpl$ConfigTimeoutChecker.trigger(RJVMImpl.java:108
0)
at weblogic.time.common.internal.ScheduledTrigger.executeLocally(Schedul
edTrigger.java:238)
at weblogic.time.common.internal.ScheduledTrigger.execute(ScheduledTrigg
er.java:229)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
Any idea?
Thanks

This is a re-post because I forgot to include my complete email address.
I am having ptoblem with T3Client.connect() in Weblogic 6.1. The method works
well in Weblogic 5.1. Here is the error message:
<Feb 17, 2004 2:13:35 PM EST> <Error> <ConnectionManager> <Closing: 'weblogic.rj
vm.t3.T3JVMConnection@53e51' because of: 'Server received a message over an unin
itialized connection: 'JVMMessage from: 'null' to: '1577296987682531743S:162.70.
250.94:[7001,7001,7002,7002,7001,7002,-1]:ccDomain:scott' cmd: 'CMD_REQUEST',
QO
S: '101', responseId: '1', invokableId: '1', flags: 'JVMIDs Not Sent, TX Context
Not Sent', abbrev offset: '91'''>
<Feb 17, 2004 2:14:35 PM EST> <Error> <HTTP> <[WebAppServletContext(6748107,cc,/
cc)] Servlet failed with Exception
java.rmi.UnexpectedException: Marshalling: ; nested exception is:
java.rmi.ConnectException: PeerGone; nested exception is:
weblogic.rjvm.PeerGoneException: Config message not received after 60
se
conds
java.rmi.ConnectException: PeerGone; nested exception is:
weblogic.rjvm.PeerGoneException: Config message not received after 60
se
conds
weblogic.rjvm.PeerGoneException: Config message not received after 60 seconds
at weblogic.rjvm.RJVMImpl$ConfigTimeoutChecker.trigger(RJVMImpl.java:108
0)
at weblogic.time.common.internal.ScheduledTrigger.executeLocally(Schedul
edTrigger.java:238)
at weblogic.time.common.internal.ScheduledTrigger.execute(ScheduledTrigg
er.java:229)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:137)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
Any idea?
Thanks

How do I use a custom UserInfo with a T3Client?

This is related to my previous post, 4655. The problem is I if
use a custom implementation of the interface
weblogic.security.acl.UserInfo in a T3Client constructor, the
client fails to connect. If I use
weblogic.security.acl.DefaultUserInfoImpl, the client connects
and disconnects without any problems. How do I use a custom
UserInfo implementation with a T3Client?

In don't know about the Gmail part, but for the Hotmail, try this link.
Here's another link from a different source.

ShutDown problem in wls6.0

Hi
we are using wls6.0 sp1 on a unix machine. when trying to stop the server by the command
java weblogic.Admin -url <url> -username system -password <password> SHUTDOWN
we get the following exception even if the server is running, and are not able to stop the server from a different session.
Exception in thread "main" java.lang.ClassCastException: Expected RemoteException, RuntimeException, or Error but received: 'class java.rmi.ConnectException'
at weblogic.common.T3Client.sendRecv(T3Client.java:724)
at weblogic.common.AdminServicesImpl.shut(AdminServicesImpl.java:97)
at weblogic.Admin.main(Admin.java:425)
Can anyone give a pointer to the problem.
Thanx
Amit

Generally use kill -9 against the pid.
Peace,
Cameron Purdy
Tangosol Inc.
Tangosol Coherence: Clustered Coherent Cache for J2EE
Information at http://www.tangosol.com/
"Amit Chopra" <[email protected]> wrote in message
news:3c3b22b6$[email protected]..
Hi
we are using wls6.0 sp1 on a unix machine. when trying to stop the serverby the command
java weblogic.Admin -url <url> -username system -password <password>SHUTDOWN
>
we get the following exception even if the server is running, and are notable to stop the server from a different session.
>
Exception in thread "main" java.lang.ClassCastException: ExpectedRemoteException, RuntimeException, or Error but received: 'class
java.rmi.ConnectException'
at weblogic.common.T3Client.sendRecv(T3Client.java:724)
atweblogic.common.AdminServicesImpl.shut(AdminServicesImpl.java:97)
at weblogic.Admin.main(Admin.java:425)
Can anyone give a pointer to the problem.
Thanx
Amit

Another t3-client/classpath problem

Hi
This is a wl6.0 problem.
I am trying to load a t3 client as a startup class.
The t3 client looks up the home interface of a
deployed ejb bean.
The startup of the client fails because it cant find the home interface
in the
classpath. This is strange since the ejb bean is deployed before the
startup
of the client.
<Feb 15, 2001 11:07:32 AM GMT+00:00> <Info> <WebLogicServer> <Invoking
startup class: com.caput.modules.listserv.client.T3Client.startup(null)>
<Feb 15, 2001 11:07:32 AM GMT+00:00> <Info> <WebLogicServer>
<com.caput.modules.listserv.client.T3Client reports: Poller / $Revision:
1.4 $ with weblogic name Poller has been started in daemon thread by the
name: Poller-thread>
java.lang.NoClassDefFoundError:
com.caput.modules.core.ejb.DomainFinderHome
at
com.caput.modules.listserv.client.Poller.class$(Poller.java:41)
at
com.caput.modules.listserv.client.Poller.getDomains(Poller.java:560)
at
com.caput.modules.listserv.client.Poller.initDomainSetup(Poller.java:480)
at com.caput.modules.listserv.client.Poller.run(Poller.java:271)
at java.lang.Thread.run(Thread.java:484)
<Feb 15, 2001 11:07:32 AM GMT+00:00> <Notice> <WebLogicServer>
<ListenThread listening on port 7051>
Evidently the interfaces of the deployed bean are not automatically put
in the classpath.
Does anyone know why?
The setup worked in well in wl5.1. But wl6.0 only operates with a java
classpath
and no weblogic classpath.
Putting the interfaces in the java classpath (in the startup script)
corrupts the
deployment of the ejb bean.
Any help on this problem would be a great help.
Thanks.
Michael Krogh
Developer
Michael Bundgaard Krogh
Caput A/S
Nygade 6
1164 Copenhagen
Denmark
Tel: +45 70 12 24 42
Fax: +45 70 11 24 42
mailto:[email protected]
http://www.caput.com

See http://e-docs.bea.com/wls/docs60/programming/topics.html#1037589
Handling EJB References in Startup Classes
If a startup class references enterprise beans, you will have to add the
EJB interfaces to the Java System classpath, because startup classes
execute before applications are deployed. This means that you cannot
change the EJB interfaces without restarting WebLogic Server.
When the deployment order will be fixed (sp1) you can use load-on-startup
servlet instead of startup class.
Michael B .Krogh <[email protected]> wrote:
Hi
This is a wl6.0 problem.
I am trying to load a t3 client as a startup class.
The t3 client looks up the home interface of a
deployed ejb bean.
The startup of the client fails because it cant find the home interface
in the
classpath. This is strange since the ejb bean is deployed before the
startup
of the client.
<Feb 15, 2001 11:07:32 AM GMT+00:00> <Info> <WebLogicServer> <Invoking
startup class: com.caput.modules.listserv.client.T3Client.startup(null)>
<Feb 15, 2001 11:07:32 AM GMT+00:00> <Info> <WebLogicServer>
<com.caput.modules.listserv.client.T3Client reports: Poller / $Revision:
1.4 $ with weblogic name Poller has been started in daemon thread by the
name: Poller-thread>
java.lang.NoClassDefFoundError:
com.caput.modules.core.ejb.DomainFinderHome
at
com.caput.modules.listserv.client.Poller.class$(Poller.java:41)
at
com.caput.modules.listserv.client.Poller.getDomains(Poller.java:560)
at
com.caput.modules.listserv.client.Poller.initDomainSetup(Poller.java:480)
at com.caput.modules.listserv.client.Poller.run(Poller.java:271)
at java.lang.Thread.run(Thread.java:484)
<Feb 15, 2001 11:07:32 AM GMT+00:00> <Notice> <WebLogicServer>
<ListenThread listening on port 7051>
Evidently the interfaces of the deployed bean are not automatically put
in the classpath.
Does anyone know why?
The setup worked in well in wl5.1. But wl6.0 only operates with a java
classpath
and no weblogic classpath.
Putting the interfaces in the java classpath (in the startup script)
corrupts the
deployment of the ejb bean.
Any help on this problem would be a great help.
Thanks.
Michael Krogh
Developer
Michael Bundgaard Krogh
Caput A/S
Nygade 6
1164 Copenhagen
Denmark
Tel: +45 70 12 24 42
Fax: +45 70 11 24 42
mailto:[email protected]
http://www.caput.com
Dimitri

Downloading problems in wls6.0

Hi all,
I'm having problems downloading wls 6.0. I've done a http download and even
though the file size is 45mb, I get only 8Mb after 30 minutes of downloading.
THen when I double click on the executable weblogic600sp1_win it just zips through
and nothing happenss. I look at the windows NT server task manager and there is
a process in memory weblogic600sp1_ Then it stays there for ages and nothing happens..
I would really like to check out the latest features of wls6.0. Any help would
be gratefully accepted..
Thanks in advance,
Surlu.

Generally use kill -9 against the pid.
Peace,
Cameron Purdy
Tangosol Inc.
Tangosol Coherence: Clustered Coherent Cache for J2EE
Information at http://www.tangosol.com/
"Amit Chopra" <[email protected]> wrote in message
news:3c3b22b6$[email protected]..
Hi
we are using wls6.0 sp1 on a unix machine. when trying to stop the serverby the command
java weblogic.Admin -url <url> -username system -password <password>SHUTDOWN
>
we get the following exception even if the server is running, and are notable to stop the server from a different session.
>
Exception in thread "main" java.lang.ClassCastException: ExpectedRemoteException, RuntimeException, or Error but received: 'class
java.rmi.ConnectException'
at weblogic.common.T3Client.sendRecv(T3Client.java:724)
atweblogic.common.AdminServicesImpl.shut(AdminServicesImpl.java:97)
at weblogic.Admin.main(Admin.java:425)
Can anyone give a pointer to the problem.
Thanx
Amit

Problem using T3Services.getT3Services()

I'm having problem calling this method. Here is a simple test file:
import weblogic.common.*;
public class TestT3Services {
public static void main (String[] args) {
try {
T3ServicesDef t3 = T3Services.getT3Services();
String servicesFileName =
t3.config().getProperty("weblogic.system.home") +
java.io.File.separator + "services.properties";
System.out.println("servicesFileName = " + servicesFileName);
catch (T3Exception e) {
System.out.println("Error: " + e.toString());
when I try to run it, I get this exception:
D:\>java TestT3Services
Exception in thread "main" java.lang.ExceptionInInitializerError:
java.lang.Null
PointerException:
at weblogic.rjvm.RJVMManager.<init>(RJVMManager.java:110)
at weblogic.rjvm.RJVMManager.getRJVMManager(RJVMManager.java:66)
at weblogic.rjvm.RJVMImpl.<clinit>(RJVMImpl.java:98)
at weblogic.rjvm.JVMID.<init>(JVMID.java, Compiled Code)
at weblogic.rjvm.JVMID.setLocalID(JVMID.java:83)
at weblogic.rjvm.JVMID.setLocalID(JVMID.java:76)
at weblogic.rjvm.JVMID.localID(JVMID.java:45)
at weblogic.common.T3Services.getT3Services(T3Services.java:28)
at TestT3Services.main(TestT3Services.java:6)
Does anybody have any clue?
TIA

Do you have LocalRJVM under $WL_HOME/classes/weblogic/rjvm??
Cheers - Wei
Anders Wallgren <[email protected]> wrote in message
news:[email protected]...
That raises an interesting question -- we have code that is designed torun
either in the client or in the server. In WebLogic 4.5.1 and previous, we
would use T3Services.getT3Services() to figure out whether we were running
inside the server or not.
In 5.1, this call now throws an exception instead of returning null.That's
OK, since we could just handle the exception and move on, assuming that
we're in 'client mode'. The problem is that the mere act of making that
call on the client side now makes it impossible to create any T3Client
objects:
Exception in thread "main" java.lang.NoClassDefFoundError:
weblogic/rjvm/LocalRJVM
at weblogic.rjvm.RJVMManager.initialize(RJVMManager.java:78)
at weblogic.kernel.Kernel.ensureInitialized(Kernel.java:137)
at weblogic.common.T3Client.<init>(T3Client.java:218)
at weblogic.common.T3Client.<init>(T3Client.java:269)
at weblogic.common.T3Client.<init>(T3Client.java:323)
at com.impresse.smartform.util.ClearCache.run(ClearCache.java:81)
at com.impresse.smartform.util.ClearCache.main(ClearCache.java:49)
If we don't make the getT3Services call, we can create T3Clients justfine.
>
So the question is, if it's now bad voodoo to even try to make that call,
how do you suggest we figure out whether we're running inside the server?
Anders Wallgren
[email protected]
"Wei Guan" <[email protected]> wrote in message
news:[email protected]...
T3Services is integrated with WebLogic server and initialized by
WebLogic
application server ONLY. You code is a standalone java application, soit
got that exception. Try to put your code in a Servlet or a JSP page, orany
other services that weblogic provided, such as EJB, Time Services. Youwill
get it work.
Cheers - Wei
Andy Tran <[email protected]> wrote in message
news:[email protected]...
I'm having problem calling this method. Here is a simple test file:
import weblogic.common.*;
public class TestT3Services {
public static void main (String[] args) {
try {
T3ServicesDef t3 = T3Services.getT3Services();
String servicesFileName =
t3.config().getProperty("weblogic.system.home") +
java.io.File.separator + "services.properties";
System.out.println("servicesFileName = " +
servicesFileName);
catch (T3Exception e) {
System.out.println("Error: " + e.toString());
when I try to run it, I get this exception:
D:\>java TestT3Services
Exception in thread "main" java.lang.ExceptionInInitializerError:
java.lang.Null
PointerException:
at weblogic.rjvm.RJVMManager.<init>(RJVMManager.java:110)
at
weblogic.rjvm.RJVMManager.getRJVMManager(RJVMManager.java:66)
at weblogic.rjvm.RJVMImpl.<clinit>(RJVMImpl.java:98)
at weblogic.rjvm.JVMID.<init>(JVMID.java, Compiled Code)
at weblogic.rjvm.JVMID.setLocalID(JVMID.java:83)
at weblogic.rjvm.JVMID.setLocalID(JVMID.java:76)
at weblogic.rjvm.JVMID.localID(JVMID.java:45)
atweblogic.common.T3Services.getT3Services(T3Services.java:28)
at TestT3Services.main(TestT3Services.java:6)
Does anybody have any clue?
TIA

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

Problem with Threads and "plase wait..."-Window

Hi everyone,
I have a problem that I'm not able to solve in any way... I have a time-consuming task (a file decryption) which I execute in a separate thread; I've used the SwingWorker class, like suggested by sun-tutorial, and it works right. The problem is that I have to wait that the decryption have finished before continuing with program-execution. Therefore I would like to display a "please wait"-window while the task runs. I've tryed all the possible ways I know but the problem is always the same: the waitWindow is displayed empty, the bounds are painted but the contents no; it's only painted when the decrypt-task has finished. Please help me, I have no more resources....
decrypt-file code:
public class DecryptFile {
private String cryptedFileNameAndPath;
private ByteArrayInputStream resultStream = null;
// need for progress
private int lengthOfTask;
private int current = -1;
private String statMessage;
public DecryptFile(String encZipFileNameAndPath) {
    cryptedFileNameAndPath = encZipFileNameAndPath;
    //Compute length of task...
    // 0 for indeterminate
    lengthOfTask = 0;
public ByteArrayInputStream getDecryptedInputStream() {
    return this.resultStream;
   * Called from ProgressBarDemo to start the task.
public void go() {
    current = -1;
    final SwingWorker worker = new SwingWorker() {
      public Object construct() {
        return new ActualTask();
    worker.start();
   * Called from ProgressBarDemo to find out how much work needs
   * to be done.
public int getLengthOfTask() {
    return lengthOfTask;
   * Called from ProgressBarDemo to find out how much has been done.
public int getCurrent() {
    return current;
public void stop() {
    current = lengthOfTask;
   * Called from ProgressBarDemo to find out if the task has completed.
public boolean done() {
    if (current >= lengthOfTask)
      return true;
    else
      return false;
public String getMessage() {
    return statMessage;
   * The actual long running task. This runs in a SwingWorker thread.
class ActualTask {
    ActualTask () {
      current = -1;
      statMessage = "";
      resultStream = AIUtil.getInputStreamFromEncZip(cryptedFileNameAndPath); //here the decryption happens
      current = 0;
      statMessage = "";
}The code that calls decryption and displays waitWindow
      final WaitSplash wS = new WaitSplash("Please wait...");
      final DecryptFile cryptedTemplate = new DecryptFile (this.templateFile);
      cryptedTemplate.go();
      while (! cryptedTemplate.done()) {
        try {
          wait();
        } catch (Exception e) { }
      this.templateInputStream = cryptedTemplate.getDecryptedInputStream();
      wS.close();Thanks, thanks, thanks in advance!
Edoardo

Maybe you can try setting the priority of the long-running thread to be lower? so that the UI will be more responsive...

T3Client problem...

Similar Messages

Maybe you are looking for