Problem with filepath

i'm trying to specify a the filepath but when i declare
String path = "C:\abc\def"
the compiler complains about an illegal escape character
i think it's because of the backslash \ but i don't understand why it should do this.
can anyone explain???
thanks

Hi,try that:
Copy the file which you needed to your source code directory,and write the code like this:
String path=getDocumentPath(); //get the current directory!!!
File file=new File(path+"filename");
Or
String path="c:\\xxx\xxx

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Problems with report builder 3.0 in SCCM 2012 R2 CU2

Hi All
I have problems with editing (Using Report builder) existing reports or creating new ones in SCCM 2012 R2 CU2
We version of SQL we use is SQL 2008 R2 SP2
I already asked this question in the SCCM 2012 forum but the problem is not related to SCCM but has something to do with application report builder
I changed the registry key and edited the Microsoft.ConfigurationManagement.exe.config.xml as described in the following link
http://blogs.technet.com/b/smartinez/archive/2012/07/03/system-center-2012-configuration-manager-create-report-don-t-work-what-do-i-do-now.aspx
Afterwards I try to edit an report I see report builder is being downloaded and after it generates the following error “Application did not succeed. Unable to continue”
Error details are
Following errors were detected during this operation.
* [22-7-2014 13:55:07] System.Deployment.Application.InvalidDeploymentException (HashValidation)
- File, Microsoft.DataWarehouse.dll, has a different computed hash than specified in manifest.
- Source: System.Deployment
- Stack trace:
at System.Deployment.Application.ComponentVerifier.VerifyFileHash(String filePath, Hash hash)
at System.Deployment.Application.ComponentVerifier.VerifyFileHash(String filePath, HashCollection hashCollection)
at System.Deployment.Application.ComponentVerifier.VerifyComponents()
at
System.Deployment.Application.DownloadManager.DownloadDependencies(SubscriptionState subState, AssemblyManifest deployManifest, AssemblyManifest appManifest, Uri sourceUriBase, String targetDirectory, String group, IDownloadNotification notification, DownloadOptions
options)
at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp)
at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc)
at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)
And in the SmsAdminUI.log I noticed the following error
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I removed the reporting point no luck -> I already installed report builder 3.0 local on my computer still no luck.
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Thx in advance
Regards
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Hi Miss Katherine,
1. I went through the SQL steps in the link you posted
2. I updated the Reg Key and Microsoft.ConfigurationManagement.exe.config file with 3.0 on both the
server and the console machine.
3. I copied the .DLL file from your OneDrive and replaced the existing one on the server.
4. I uninstalled and re-installed the reporting role on the server and received the 1015 in the log.
5. I restarted the server and the client machine
I do get a slightly different error now after using the new DLL
Errors With Original DLL
ERROR DETAILS
* [9/30/2014 8:42:03 AM] System.Deployment.Application.InvalidDeploymentException (HashValidation)
- File, Microsoft.DataWarehouse.dll, has a different computed hash than specified in manifest.
- Source: System.DeploymentERROR DETAILS
Errors With New DLL
ERROR DETAILS
Following errors were detected during this operation.
* [9/30/2014 9:17:13 AM] System.Deployment.Application.InvalidDeploymentException (RefDefValidation)
- Reference in the manifest does not match the identity of the downloaded assembly Microsoft.DataWarehouse.dll.
- Source: System.Deployment

Problem with a template method in JDialog

Hi friends,
I'm experiencing a problem with JDialog. I have a base abstract class ChooseLocationDialog<E> to let a client choose a location for database. This is an abstract class with two abstract methods:
protected abstract E prepareLocation();
protected abstract JPanel prepareForm();Method prepareForm is used in the constructor of ChooseLocationDialog to get a JPanel and add it to content pane.
Method prepareLocation is used to prepare location of a database. I have to options - local file and networking.
There are two subclasses ChooseRemoteLocationDialog and ChooseLocalFileDialog.
When I start a local version, ChooseLocalFileDialog with one input field for local file, everything works fine and my local client version starts execution.
The problem arises when I start a network version of my client. Dialog appears and I can enter host and port into the input fields. But when I click Select, I get NullPointerException. During debugging I noticed that the values I entered into these fields ("localhost" for host and "10999" for port) were not set for corresponding JTextFields and when my code executes getText() method for these input fields it returns empty strings. This happens only for one of these dialogs - for the ChooseRemoteLocationDialog.
The code for ChooseLocationDialog class:
public abstract class ChooseLocationDialog<E> extends JDialog {
     private E databaseLocation;
     private static final long serialVersionUID = -1630416811077468527L;
     public ChooseLocationDialog() {
          setTitle("Choose database location");
          setAlwaysOnTop(true);
          setModal(true);
          Container container = getContentPane();
          JPanel mainPanel = new JPanel();
          //retrieving a form of a concrete implementation
          JPanel formPanel = prepareForm();
          mainPanel.add(formPanel, BorderLayout.CENTER);
          JPanel buttonPanel = new JPanel(new GridLayout(1, 2));
          JButton okButton = new JButton(new SelectLocationAction());
          JButton cancelButton = new JButton(new CancelSelectAction());
          buttonPanel.add(okButton);
          buttonPanel.add(cancelButton);
          mainPanel.add(buttonPanel, BorderLayout.SOUTH);
          container.add(mainPanel);
          pack();
          Toolkit toolkit = Toolkit.getDefaultToolkit();
          Dimension screenSize = toolkit.getScreenSize();
          int x = (screenSize.width - getWidth()) / 2;
          int y = (screenSize.height - getHeight()) / 2;
          setLocation(x, y);
          addWindowListener(new WindowAdapter() {
               @Override
               public void windowClosing(WindowEvent e) {
                    super.windowClosing(e);
                    System.exit(0);
     public E getDatabaseLocation() {
            return databaseLocation;
     protected abstract E prepareLocation();
     protected abstract JPanel prepareForm();
      * Action for selecting location.
      * @author spyboost
     private class SelectLocationAction extends AbstractAction {
          private static final long serialVersionUID = 6242940810223013690L;
          public SelectLocationAction() {
               putValue(Action.NAME, "Select");
          @Override
          public void actionPerformed(ActionEvent e) {
               databaseLocation = prepareLocation();
               setVisible(false);
     private class CancelSelectAction extends AbstractAction {
          private static final long serialVersionUID = -1025433106273231228L;
          public CancelSelectAction() {
               putValue(Action.NAME, "Cancel");
          @Override
          public void actionPerformed(ActionEvent e) {
               System.exit(0);
}Code for ChooseLocalFileDialog
public class ChooseLocalFileDialog extends ChooseLocationDialog<String> {
     private JTextField fileTextField;
     private static final long serialVersionUID = 2232230394481975840L;
     @Override
     protected JPanel prepareForm() {
          JPanel panel = new JPanel();
          panel.add(new JLabel("File"));
          fileTextField = new JTextField(15);
          panel.add(fileTextField);
          return panel;
     @Override
     protected String prepareLocation() {
          String location = fileTextField.getText();
          return location;
}Code for ChooseRemoteLocationDialog
public class ChooseRemoteLocationDialog extends
          ChooseLocationDialog<RemoteLocation> {
     private JTextField hostField;
     private JTextField portField;
     private static final long serialVersionUID = -2282249521568378092L;
     @Override
     protected JPanel prepareForm() {
          JPanel panel = new JPanel(new GridLayout(2, 2));
          panel.add(new JLabel("Host"));
          hostField = new JTextField(15);
          panel.add(hostField);
          panel.add(new JLabel("Port"));
          portField = new JTextField(15);
          panel.add(portField);
          return panel;
     @Override
     protected RemoteLocation prepareLocation() {
          String host = hostField.getText();
          int port = 0;
          try {
               String portText = portField.getText();
               port = Integer.getInteger(portText);
          } catch (NumberFormatException e) {
               e.printStackTrace();
          RemoteLocation location = new RemoteLocation(host, port);
          return location;
}Code for RemoteLocation:
public class RemoteLocation {
     private String host;
     private int port;
     public RemoteLocation() {
          super();
     public RemoteLocation(String host, int port) {
          super();
          this.host = host;
          this.port = port;
     public String getHost() {
          return host;
     public void setHost(String host) {
          this.host = host;
     public int getPort() {
          return port;
     public void setPort(int port) {
          this.port = port;
}Code snippet for dialog usage in local client implementation:
final ChooseLocationDialog<String> dialog = new ChooseLocalFileDialog();
dialog.setVisible(true);
location = dialog.getDatabaseLocation();
String filePath = location;Code snippet for dialog usage in network client implementation:
final ChooseLocationDialog<RemoteLocation> dialog = new ChooseRemoteLocationDialog();
dialog.setVisible(true);
RemoteLocation location = dialog.getDatabaseLocation();Exception that I'm getting:
Exception occurred during event dispatching:
java.lang.NullPointerException
     at suncertify.client.gui.dialog.ChooseRemoteLocationDialog.prepareLocation(ChooseRemoteLocationDialog.java:42)
     at suncertify.client.gui.dialog.ChooseRemoteLocationDialog.prepareLocation(ChooseRemoteLocationDialog.java:1)
     at suncertify.client.gui.dialog.ChooseLocationDialog$SelectLocationAction.actionPerformed(ChooseLocationDialog.java:87)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
     at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
     at java.awt.Component.processMouseEvent(Component.java:6134)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
     at java.awt.Component.processEvent(Component.java:5899)
     at java.awt.Container.processEvent(Container.java:2023)
     at java.awt.Component.dispatchEventImpl(Component.java:4501)
     at java.awt.Container.dispatchEventImpl(Container.java:2081)
     at java.awt.Component.dispatchEvent(Component.java:4331)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3895)
     at java.awt.Container.dispatchEventImpl(Container.java:2067)
     at java.awt.Window.dispatchEventImpl(Window.java:2458)
     at java.awt.Component.dispatchEvent(Component.java:4331)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
     at java.awt.Dialog$1.run(Dialog.java:1046)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)java version "1.6.0"
OpenJDK Runtime Environment (build 1.6.0-b09)
OpenJDK Client VM (build 1.6.0-b09, mixed mode, sharing)
OS: Ubuntu 8.04
Appreciate any help.
Thanks.
Edited by: spyboost on Jul 24, 2008 5:38 PM

What a silly error! I have to call Integer.parseInt instead of getInt. Integer.getInt tries to find a system property. A small misprint, but a huge amount of time to debug. I always use parseInt method and couldn't even notice that silly misprint. Sometimes it's useful to see the trees instead of whole forest :)
It works perfectly. Sorry for disturbing.

Problem with concatenation, need output in a desired format

Hi all,
I have a weird problem with concatenation.
I should get an output in such a way that the result would be
Put C:\TEMP\test20090210.xml /FOLDER1/test20090210.xml
For this first to get C:\TEMP\test20090210.xml format I said
CONCATENATE 'C:\TEMP\test' sy-datum '.XML' INTO filepath.
For this secondly to get /FOLDER1/test20090210.xml format I said
CONCATENATE '/FOLDER1/test' sy-datum '.XML' INTO filepath1.
Now I need to get the format
Put C:\TEMP\test20090210.xml /FOLDER1/test20090210.xml
And to get this I said
CONCATENATE 'put' filepath INTO filepath SEPARATED BY space.
And the output for filepath was Put C:\TEMP\test20090210.xml.
But I want u2026u2026u2026.Put C:\TEMP\test20090210.xml /FOLDER1/test20090210.xml.
How can I achieve this?
If I say
CONCATENATE filepath INTO filepath1 SEPARATED BY space. It throws a syntax error saying
u201CUnable to interpret filepathu201D
Please help me..i am dying to figure out how to concatenate and get the required output.
My filepath contains u2026 Put C:\TEMP\test20090210.xml
My filepath1 contains u2026/FOLDER1/test20090210.xml
I need final output asu2026u2026u2026u2026.
Put C:\TEMP\test20090210.xml /FOLDER1/test20090210.xml
How to attain this..please helpu2026where I am going wrong..i declared filepath and filepath1 as STRING

Hi all,
Thanks for immediate reply...now it works..
but i also need to put a counter like thing to distinguish my files.
for my filepath....
i want it as C:\TEMP\test20090210110146 so i said....
CONCATENATE ' C:\TEMP\test' sy-datum s y-uzeit '.XML'.
Actually i am generating XML files and naming them as testsystemdatesystemtime.
But i am concerend that my filed might be overwrriten if a file gets generated in a fraction of a millisecond..so to avoid that now i want to put a counter.
i.e my filepath should now be as follows each time loop executes...
C:\TEMP\test20090210110146_1
C:\TEMP\test20090210110147 _2
C:\TEMP\test20090210110148 _3.........and son on how can i do it
i.e testsystemdatesystemtime+ a counter(which tells how many times loop executed)
Once again thanks to all for immediate help...

Problems with file paths in ApplescriptObjC

Hi
I am having a problem with trying to Open/Read/Write/Close text files in ApplescriptObjC. The following piece of script works in Applescript but when I try to incorporate in ASOC via Xcode I get the following error "Can’t make current application into type «class fsrf»" and I have no idea what that means!
I've tried using POSIX paths but still doesn't work. As usual, any help gratefully received.
I am using the Control Record to hold the last reference number used so when I add another row to a spreadsheet it will generate the next unique reference.
set filePath "Macintosh HD:Users:Ours:Documents:Cats Protection:Control Record.txt"
set fileReference to open for access (file filePath) with write permission
set lastNumber to read alias filePath -- read all data
set nextNumber to (text -1 thru -2) of lastNumber as integer -- extract last number
set nextNumber to (nextNumber + 1) -- increment number
set nextNumber to text (2 * -1) thru -1 of ("0" & nextNumber) -- add leading zero
write nextNumber to fileReference starting at 9 -- update next number
close access fileReference

«class fsrf» is a file system reference. Long story, but cocoa changed the preferred way to handle file references (in 10.6, I think) and sometimes applescript trips over the difference.
try changing the first three lines like so:
set filePath to "/Users/Ours/Documents/Cats Protection/Control Record.txt"
set fileReference to open for access filePath with write permission
set lastNumber to read fileReference -- read all data
Cocoa is generally happier with posix paths, open for access shouldn't need the file keyword, and reading from the file reference (rather than specifying the file again) is cleaner.

Problem with session while sending a multipart-form (a file via post)

I have a problem with the communication between my applet and my server. I use a method to post an xml to my server with the Content-Type "application/x-www-form-urlencoded" and with it I'm not having any problem to preserve the session.
However I use another method I found in the forums to post files and try to adapt it, but I'm being send from the server to the login page because it's not recognizing my session
Can anybody help me? This is my method
public String uploadFile(String adr, BufferedImage img) {
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        String s;
        File f = null;
        URL url;
        URLConnection conn;
        try {
            url = new URL(adr);
            conn = url.openConnection();
            conn.setDoOutput(true);
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                    "multipart/form-data; boundary=" + CONTENT_BOUNDARY);
            conn.setRequestProperty("file-Name", "process_image.jpg");
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            wr
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                res += s;
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        catch (IOException io) {
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        return res;
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private static final String SESSION_KEY = "_session_id";
URLEncoder.encode(SESSION_KEY, "UTF-8") + "=" +
URLEncoder.encode(sessionId, "UTF-8");
wr.writeBytes(content);
....

Yes, the only way is to pass the value u want in the query string. But make sure that the value is not too large.
In case you have too much info i guess the only way is to circumvent multipart and handle the process in your own custom class, which wont be worth the effort if u need pass only 2-3 small parameters.
Always,
Leo.
Hi,
Before I upload a file, I want to get a few parameter
values (getParameter) on the form first. I've tried
using com.oreilly.servlet MultipartRequest and a few
other free servlets but they require that the file
must to be uploaded first. For example:
MultipartRequest multi = new
MultipartRequest(request,filepath, 10*1024*1024);
//this will instantiate the object and upload the
file
String command = multi.getParameter("command"); //get
the form parameter
Is there any way I can get the parameter first before
uploading the file? I truly appreciate any helps you
can provide me.
Regards,
Lily

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Hello everyone,
I'm having a strange problem with my application. In short: the goal of the program is to communicate between client and server (which includes exchange of messages and a binary file). The problem is, when I'm beginning to write to a stream on client side, server acts, like it's not listening. I'd appreciate your help and advice. Here I'm including the source:
The server:
import java.io.IOException;
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import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
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          outputFileStream1.close();
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connection.CloseStream();
Connect class:import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
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public Socket socket;
public BufferedInputStream streamIn;
public BufferedOutputStream streamOut;
Connect(String host, Integer port)
try
this.socket = new Socket(host, port);
this.streamIn = new BufferedInputStream(this.socket.getInputStream());
this.streamOut = new BufferedOutputStream(this.socket.getOutputStream());
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System.err.print("The Host you have specified is not valid.");
e.getStackTrace();
System.exit(1);
catch (IOException e)
System.err.print("An I/O exception occured.");
e.getStackTrace();
System.exit(1);
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this.streamIn.close();
this.socket.close();
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The problem that was solved here was a different problem actually, concerning different source code, in which the solution I offered above doesn't arise. The solution I offered here applied to the source code you posted here.

Problem with Script in Adium

Greetings,
I'm having a problem with a Script. In Adium, I'm trying to use a Script called "quoteDB" that basically picks up a random quote from a file and shows it. Since I'd like to use it to change my display name from time to time, my problem is that the script runs every 20 seconds, so my name also changes..
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on substitute(filePath)
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set j to j + 1
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Thanks a lot.
rc

The statement for a delay is:
delay 60
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on idle
return 60
end idle
I don't know what you are using to run the script every 20 seconds (or why your name is changing), so there may be a conflict with the various timings.

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();
}

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 camera.

Hi everybody!
I've a problem with taking snapshot.
I would like to display a loading screen after it take snapshot ( sometimes i
have to wait few seconds after i took snapshot. Propably photo is being taken in time where i have to wait).
I was trying to use threads but i didn't succeed.
I made this code:
display.setCurrent(perform);
        new Thread(new Runnable(){
            public void run() {
                while((!performing.isShown()) && (backgroundCamera.isShown())){
                    Thread.yield();
                notifyAll();
        }).start();
        new Thread(new Runnable(){
            public void run() {
                try {
                    this.wait();
                } catch(Exception e) {
                    exceptionHandler(e);
                photo = camera.snapshot();
                display.setCurrent(displayPhoto);
        }).start();This code is sometimes showing performing screen but sometimes no.
I don't know why. In my opinion performing.isShown() method isn't working correctly.
Does anyone have some idea how to use threads here?

Hi,
I've finally managed to work this fine.
The code:
       Object o = new Object();
       display.setCurrent(perform);
        new Thread(new Runnable(){
            public void run() {
                while(!performing.isShown()){
                    Thread.yield();
               synchronized(o) {
                  o.notify();
        }).start();
        new Thread(new Runnable(){
            public void run() {
                try {
                    synchronized(o) {
                       o.wait(1);
                } catch(Exception e) {
                    exceptionHandler(e);
                photo = camera.snapshot();
                display.setCurrent(displayPhoto);
        }).start();

Problem with threads hanging

We have a problem where our application stops responding after a few days of usage. Things will for fine for a day or two, and then pretty quickly threads will start getting hung up, usually in places where they are allocating memory
We are running WebLogic 8.1 SP2 on Sun JDK 1.4.2_04 on Solaris 8 using the alternate threading model and the -server hotspot vm. We are running pretty much the same code that we had no problems with under WebLogic 6.1 SP4 and Sun JDK 1.3.1.
A thread dump usually shows that some or all of our execute threads are in the state "waiting for monitor entry" even though they are not currently waiting on any java locks. Here is a sample thread from the thread dump (we have ~120 threads so I don't want to post the full dump).
=============================================================================================
"ExecuteThread: '8' for queue: 'itgCrmWarExecutionQueue'" daemon prio=5 tid=0x005941d0 nid=0x2c waiting for monitor entry [c807f000..c807fc28]
at java.lang.String.substring(String.java:1446)
at java.lang.String.substring(String.java:1411)
at weblogic.servlet.internal.ServletRequestImpl.getRelativeUri(ServletRequestImpl.java:1872)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3492)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
=============================================================================================
String.java line 1446 for this jdk allocates a new String object, and all the other threads in this state also are creating new objects or arrays, etc.
We've done a pstack on this process when it's in this state, and the threads that are in the "waiting for monitor entry" that look like they're allocating memory are all waiting on the same lwp_mutex_lock with some allocation method that's calling into the native TwoGenerationCollectorPolicy.mem_allocate_work (see pstack output below for the same thread as in the thread dump above)
=============================================================================================
----------------- lwp# 44 / thread# 44 --------------------
ff31f364 lwp_mutex_lock (e3d70)
fee92384 __1cNObjectMonitorGenter26MpnGThread__v_ (5000, 525c, 5000, 50dc, 4800, 4af0) + 2d8
fee324d4 __1cSObjectSynchronizerKfast_enter6FnGHandle_pnJBasicLock_pnGThread__v_ (c807f65c, c807f7d4, 5941d0, 0, 35d654, fee328ec) + 68
fee32954 __1cQinstanceRefKlassZacquire_pending_list_lock6FpnJBasicLock__v_ (c807f7d4, ff170000, d4680000, 4491d4, fee1bc2c,
0) + 78
fee3167c __1cPVM_GC_OperationNdoit_prologue6M_i_ (c807f7bc, 4400, ff170000, 2d2b8, 4a6268, c807fa18) + 38
fee2e0b0 __1cIVMThreadHexecute6FpnMVM_Operation__v_ (c807f7bc, 963a8, 0, 0, 1, 0) + 90
fed2c2a4 __1cbCTwoGenerationCollectorPolicyRmem_allocate_work6MIii_pnIHeapWord__ (962c0, ff1c29ec, ff1c297c, ff131a26, 4800, 4998) + 160
fed22940 __1cNinstanceKlassRallocate_instance6MpnGThread__pnPinstanceOopDesc__ (ee009020, 5941d0, 15ca581, 3647f0, 4a6268, c807f8c8) + 180
fed34928 __1cLOptoRuntimeFnew_C6FpnMklassOopDesc_pnKJavaThread__v_ (ee009018, 5941d0, 0, 0, 0, 0) + 28
fa435a58 ???????? (ee009018, e86de, 15ca4de, 50dc, 5941d0, c807f9c8)
fb36f9a4 ???????? (0, d412ccd8, ee046c28, ff170000, 0, 0)
fad8b278 ???????? (ee046c28, d6000c90, ee046530, 8, db8e8450, c807f9e8)
fad62abc ???????? (d412ccd8, ee046530, d6000c90, ee3bfa38, 8, c807fa18)
fa4b3c38 ???????? (c807fb9c, 0, f2134700, fa415e50, 8, c807faa8)
fa40010c ???????? (c807fc28, c807fe90, a, ee9e1e20, 4, c807fb40)
fed5d48c __1cJJavaCallsLcall_helper6FpnJJavaValue_pnMmethodHandle_pnRJavaCallArguments_pnGThread__v_ (c807fe88, c807fcf0, c807fda8, 5941d0, 5941d0, c807fd00) + 27c
fee4b784 __1cJJavaCallsMcall_virtual6FpnJJavaValue_nLKlassHandle_nMsymbolHandle_4pnRJavaCallArguments_pnGThread__v_ (ff170000, 594778, c807fd9c, c807fd98, c807fda8, 5941d0) + 164
fee5e8dc __1cJJavaCallsMcall_virtual6FpnJJavaValue_nGHandle_nLKlassHandle_nMsymbolHandle_5pnGThread__v_ (c807fe88, c807fe84, c807fe7c, c807fe74, c807fe6c, 5941d0) + 6c
fee6fc74 __1cMthread_entry6FpnKJavaThread_pnGThread__v_ (5941d0, 5941d0, 838588, 594778, 306d10, fee69254) + 128
fee6927c __1cKJavaThreadDrun6M_v_ (5941d0, 2c, 40, 0, 40, 0) + 284
fee6575c _start   (5941d0, fa1a1600, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Also when it's having this problem, the "VM Thread" is always using a lot of processor time. We did a couple of pstacks today while it was having this problem, and this thread was stuck in the ONMethodSweeper.sweep for over 15 minutes when we finally killed the server.
From the thread dump:
"VM Thread" prio=5 tid=0x000e2d20 nid=0x2 runnable
From the first pstack:
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed40c04 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (42a2f4, fa5fa46d, ffffffff, fc4ffcb8, 42a2f4, 42a324) + 124
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (42a2f0, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (fa5f7f88, fa608940, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start   (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Second pstack
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed41180 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (0, ff1b9664, ffffffff, fc4ffcb8, a6f2cc, fc4ffbd0) + 6a0
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (a6f2c8, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (faded4c8, fadf2c80, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start   (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Has anyone ever seen anything like this? I'm trying to figure out if this is caused by something we're doing, or something relating to our environment and jvm options. Any ideas?

Thanks for the reply - I'm testing our app with the +UseConcMarkSweepGC now in our test environment to make sure it doesn't cause any problems there. Unfortunately the only place we've had this problem is on the production server, so it's extra difficult debugging this.
We're using the following memory options:
-ms512m -mx512m -XX:NewSize=128m -XX:PermSize=192m -XX:MaxNewSize=128m -XX:MaxPermSize=192m -XX:SurvivorRatio=8and the following debugging options, as we've also been seeing OutOfMemoryErrors ( see http://forum.java.sun.com/thread.jsp?forum=37&thread=522354&tstart=45&trange=15 )
-verbosegc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGCBTW, which c++filt version and options are you using? Our Solaris boxes only seem to have the GNU version installed. I was trying to run that on some of the other stack traces and wasn't getting anywhere, and didn't know if because it was GNU version wouldn't work on something compiled with the Sun compiler.
Thanks!
--Andy

Problem with threads and ProgressMonitor

Dear Friends:
I have a little problem with a thread and a ProgressMonitor. I have a long time process that runs in a thread (the thread is in an separate class). The thread has a ProgressMonitor that works fine and shows the tasks progress.
But I need deactivate the main class(the main class is the user interface) until the thread ends.
I use something like this:
LongTask myTask=new LongTask();
myTask.start();
myTask.join();
Now, the main class waits for the task to end, but the progress monitor don`t works fine: it shows only the dialog but not the progress bar.
What's wrong?

Is the dialog a modal dialog? This can block other UI updates.
In general, you should make sure that it isn't modal, and that your workThread has a fairly low priority so that the UI can do its updating

Problem with threads and/or memory

I'm developing an application where there are 3 threads. One of them sends a request to the other, and if the 2nd can't answer it, it sends it to the 3rd (similar to CPU -> CACHE -> MEMORY). When i run the program with 1000-10.000 requests, no problem occurs. When i run it with 300.000-1.000.000 requests, it sometimes hangs. Is this a problem with the garbage collector, or should it be related to the threads mecanism.
(note: eache thread is in execution using a finite state machine)

i had been running the program inside Netbeans.
Running the jar using the command line outside
Netbeans i have no more problems... Does Netbeans use
it's own JVM?Depends how you set it up, but look under the options. There are settings for the compiler and jvm that it uses.

Problem with filepath

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