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  • Setting JMX attribute on VM as command line paramater

    - by 117440226733149663383
    I've done some searching, but can't seem to find a way to do this. We'd like to proactively monitor our permgen space via JMX. It seems the best way to do this is through the UsageThreshold attribute on the "PS Perm Gen" MemoryPool. By default, this is set to 0. Is there a way to specify this, or any JMX attribute, as a -D parameter to VM so this can be set automatically at startup? Or is there another mechanism to load JMX attributes automatically? Thanks.

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  • I create a JPanel and GridBagLayout within an object but when I get it in the main object, attributes are missing

    - by chickeneaterguy
    public oijoij() { String name = "Jackie"; int priority = 50; int minPriority = 90; setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 300); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); contentPane.setLayout(new BorderLayout(0, 0)); setContentPane(contentPane); JPanel panel = new JPanel(); GridBagLayout gbc_panel = new GridBagLayout(); gbc_panel.columnWidths = new int[]{0,0,0}; gbc_panel.rowHeights = new int[]{0, 0, 0, 0, 0, 0}; gbc_panel.columnWeights = new double[]{0.0, 0.0, Double.MIN_VALUE}; gbc_panel.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE}; panel.setBorder(new LineBorder(new Color(0,0,0),1)); panel.setLayout(gbc_panel); panel.setAlignmentX(Component.LEFT_ALIGNMENT); panel.setMinimumSize(new Dimension(110,110)); panel.setPreferredSize(new Dimension(110, 110)); panel.setSize(new Dimension(110,110)); JLabel lblNewLabel = new JLabel("Process ID:"); GridBagConstraints gbc_lblNewLabel = new GridBagConstraints(); gbc_lblNewLabel.gridheight = 2; gbc_lblNewLabel.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel.gridx = 0; gbc_lblNewLabel.gridy = 0; panel.add(lblNewLabel, gbc_lblNewLabel); JLabel lblNewLabel_1 = new JLabel(name); GridBagConstraints gbc_lblNewLabel_1 = new GridBagConstraints(); gbc_lblNewLabel_1.gridheight = 2; gbc_lblNewLabel_1.insets = new Insets(0, 0, 5, 0); gbc_lblNewLabel_1.gridx = 1; gbc_lblNewLabel_1.gridy = 0; panel.add(lblNewLabel_1, gbc_lblNewLabel_1); JLabel lblNewLabel_2 = new JLabel("Priority:"); GridBagConstraints gbc_lblNewLabel_2 = new GridBagConstraints(); gbc_lblNewLabel_2.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel_2.gridx = 0; gbc_lblNewLabel_2.gridy = 2; panel.add(lblNewLabel_2, gbc_lblNewLabel_2); JLabel lblNum = new JLabel(Integer.toString(priority)); GridBagConstraints gbc_lblNum = new GridBagConstraints(); gbc_lblNum.insets = new Insets(0, 0, 5, 0); gbc_lblNum.gridx = 1; gbc_lblNum.gridy = 2; panel.add(lblNum, gbc_lblNum); JLabel lblNewLabel_3 = new JLabel("Min Priority:"); GridBagConstraints gbc_lblNewLabel_3 = new GridBagConstraints(); gbc_lblNewLabel_3.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel_3.gridx = 0; gbc_lblNewLabel_3.gridy = 3; panel.add(lblNewLabel_3, gbc_lblNewLabel_3); JLabel lblMp = new JLabel(Integer.toString(minPriority)); GridBagConstraints gbc_lblMp = new GridBagConstraints(); gbc_lblMp.insets = new Insets(0, 0, 5, 0); gbc_lblMp.gridx = 1; gbc_lblMp.gridy = 3; panel.add(lblMp, gbc_lblMp); JLabel lblTimeSlice = new JLabel("Time Slice:"); GridBagConstraints gbc_lblTimeSlice = new GridBagConstraints(); gbc_lblTimeSlice.insets = new Insets(0, 0, 0, 5); gbc_lblTimeSlice.gridx = 0; gbc_lblTimeSlice.gridy = 4; panel.add(lblTimeSlice, gbc_lblTimeSlice); Random r = new Random(System.currentTimeMillis()); panel.setBackground(new Color( r.nextInt(255 - 210) + 210, r.nextInt(255 - 210) + 210, r.nextInt(255 - 210) + 210)); } I have accessor methods for the GridBagLayout and the JPanel. When calling the functions in another file, it looks like I just get the JPanel (but without any labels or the layout or other GridBagLayout features). Help?

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  • How to avoid using this in a constructor

    - by Paralife
    I have this situation: interface MessageListener { void onMessageReceipt(Message message); } class MessageReceiver { MessageListener listener; public MessageReceiver(MessageListener listener, other arguments...) { this.listener = listener; } loop() { Message message = nextMessage(); listener.onMessageReceipt(message); } } and I want to avoid the following pattern: (Using the this in the Client constructor) class Client implements MessageListener { MessageReceiver receiver; MessageSender sender; public Client(...) { receiver = new MessageReceiver(this, other arguments...); sender = new Sender(...); } . . . @Override public void onMessageReceipt(Message message) { if(Message.isGood()) sender.send("Congrtulations"); else sender.send("Boooooooo"); } } The reason why i need the above functionality is because i want to call the sender inside the onMessageReceipt() function, for example to send a reply. But I dont want to pass the sender into a listener, so the only way I can think of is containing the sender in a class that implements the listener, hence the above resulting Client implementation. Is there a way to achive this without the use of 'this' in the constructor? It feels bizare and i dont like it, since i am passing myself to an object(MessageReceiver) before I am fully constructed. On the other hand, the MessageReceiver is not passed from outside, it is constructed inside, but does this 'purifies' the bizarre pattern? I am seeking for an alternative or an assurance of some kind that this is safe, or situations on which it might backfire on me.

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  • XML: to append xml document into the node of another document

    - by Bibhaw
    Hi all, I have to insert file1.xml elements into another file2.xml. file2.xml has several node and each node has it's node_id. is there any way to do that. let suppose : file1.xml : <root> <node_1> ......</node_1> </root> file2.xml : <root> <node> <node_id>1</node_id> </node> </root> I want ? file2.xml : <root> <node> <node_1>......</node_1> [here i want to append the file1.xml] </node> </root>

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  • Where did this class come from?

    - by Karl
    How would you go about establishing where a class ( or maybe resource ) has been loaded from? I am trying to work out exactly where a class has been loaded from. Does anyone know if you can find out the following: Which Jar file did the class come from ? What classloader loaded the file?

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  • How to get MimeMessage instead of MimeBodyPart?

    - by Padmarag
    I'm trying to get the FROM email address in Mule ESB. I'm getting the retrieved object as MimeBodyPart, I'd like to have MimeMessage instead. How to do this? The Mule config part for inbound end-point is as below - <inbound> <pop3s:inbound-endpoint user="xxx%40gmail.com" password="xxx" host="pop.gmail.com"/> </inbound> Thanks in advance.

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  • Tomcat - Redirect to Error Page when ServletContextListener fails

    - by Vic
    When Tomcat starts it calls my ServletContextListener to obtain a database connection, which I will later use in other servlets with getServletContext(). It is called in my web.xml as: listener listener-class org.ppdc.database.DBCPoolingListener /listener-class /listener (I removed the < because they wouldn't display properly in this message. If I cannot connect to the database when Tomcat starts up I get a 404 error, because Tomcat cannot start the application. How can I redirect the user to a custom error page at this point? I tried the following in my web.xml (I have the < brackets in the original): (error-page) (error-code404/error-code) (location/file_not_found.html/location) (/error-page) Any ideas on how to redirect a user to one of my error pages when Tomcat tries to start the application? Thanks Vic

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  • Standard Place for an Empty String Array in the JDK

    - by Simon B
    Hi is there a standard place for accessing empty array constants in the JDK 1.5. When I want to do a conversion from a String Collection (e.g. ArrayList)to a String Array I find myself using my own which is defined in my own Constants class: public static final String[] EMPTY_STRING_ARRAY = new String[0]; And then in my client code something like: String[] retVal = myStringList.toArray(Constants.EMPTY_STRING_ARRAY); return retVal; I was wondering if this is the "idiomatic" of doing it or if I'm missing something I get the impression from the brief search I did that this kind of thing is prevalent in many people's code. Any ideas, answers, comment (aside from that I shouldn't really use String Arrays) greatly appreciated, Cheers Simon

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  • Eclipse RCP File Explorer

    - by yournamehere
    Is there a good Eclipse RCP file explorer out there? I need a platform independent file explorer which should be extensible through plugins. I only found File Arranger , wich seems to be outdated. I just ask cause i want to develop such an explorer, but it wouldn't make sense if there is already a solution out there.

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  • Hibernate Mapping Annotation Question?

    - by paddydub
    I've just started using hibernate and I'm trying to map walking distance between two coordinates into a hashmap, There can be many connections from one "FromCoordinate" to another "ToCoordinate". I'm not sure if i've implemented this correctly, What annotations do i need to map this MashMap? Thanks @Entity @Table(name = "COORDCONNECTIONS") public class CoordinateConnection implements Serializable{ private static final long serialVersionUID = -1624745319005591573L; /** auto increasing id number */ @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "ID") @id private int id; @Embedded public FromCoordinate fromCoord; @Embedded public ToCoordinate toCoord; HashMap<Coordinate, ArrayList<Coordinate>> coordWalkingConnections = new HashMap<Coordinate, ArrayList<Coordinate>>(); } public class FromCoordinate implements ICoordinate { @Column(name = "FROM_LAT") private double latitude; @Column(name = "FROM_LNG") private double longitude; } public class ToCoordinate implements ICoordinate { @Column(name = "TO_LAT") private double latitude; @Column(name = "TO_LNG") private double longitude; @Column(name = "DISTANCE") private double distance; } DATABASE STRUCTURE id FROM_LAT FROM_LNG TO_LAT TO_LNG Dist 1 43.352669 -6.264341 43.350012 -6.260653 0.38 2 43.352669 -6.264341 43.352669 -6.264341 0.00 3 46.352669 -6.264341 43.353373 -6.262013 0.17 4 47.352465 -6.265865 43.351290 -6.261200 0.25 5 45.452578 -6.265768 43.352788 -6.264396 0.01 6 45.452578 -6.265768 45.782788 -6.234523 0.01 ..... ... . Example HashMap for HashMap<Coordinate, ArrayList<Coordinate>> <KEY{43.352669 -6.264341}, Arraylist VALUES{(43.350012,-6.260653,0.383657), (43.352669, -6.264341, 0.000095), (43.353373, -6.262013, 0.173201)}> <KEY{47.352465 -6.265865}, Arraylist VALUES{(43.351290,-6.261200,0.258781)}> <KEY{45.452578 -6.265768}, Arraylist VALUES{(43.352788,-6.264396,0.013726),(45.782788,-6.234523,0.017726)}>

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  • JNDI InvalidnameException for CN 'LastName, FirstName'

    - by user321524
    Hi: I am writing to active directory using JNDI, it is successful for "CN=Yuri Gagarin,OU=Admins,DC=ead,DC=ubc,DC=ca"; but fails for "CN=Gagarin, Yuri,OU=Admins,DC=ead,DC=ubc,DC=ca". I need to store displayName, cn, name in the format 'lastName, FirstName'. What do I need to do to get this going? Thanks very much.

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  • how can i unmarshall in jaxb and enjoy the schema validation without using an explicit schema file

    - by ekeren
    I am using jaxb for my application configurations I feel like I am doing something really crooked and I am looking for a way to not need an actual file or this transaction. As you can see in code I: 1.create a schema into a file from my JaxbContext (from my class annotation actually) 2.set this schema file in order to allow true validation when I unmarshal JAXBContext context = JAXBContext.newInstance(clazz); Schema mySchema = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(schemaFile); jaxbContext.generateSchema(new MySchemaOutputResolver()); // ultimately creates schemaFile Unmarshaller u = m_context.createUnmarshaller(); u.setSchema(mySchema); u.unmarshal(...); do any of you know how I can validate jaxb without needing to create a schema file that sits in my computer? Do I need to create a schema for validation, it looks redundant when I get it by JaxbContect.generateSchema ? How do you do this?

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  • method names with fluent interface

    - by deamon
    I have a Permissions class with methods in fluent style like this: somePermissions.setRead(true).setWrite(false).setExecute(true) The question is, whether I should name these methods set{Property} or only {property}. The latter would look like this: somePermissions.read(true).write(false).execute(true) If I look at these methods separately I would expect that read reads something, but on the other hand it is closer to the intention to have something like named paramaters like in Scala: Permission(read=true, write=false, execute=true)

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  • Drawing to the canvas

    - by Mattl
    I'm writing an android application that draws directly to the canvas on the onDraw event of a View. I'm drawing something that involves drawing each pixel individually, for this I use something like: for (int x = 0; x < xMax; x++) { for (int y = 0; y < yMax; y++){ MyColour = CalculateMyPoint(x, y); canvas.drawPoint(x, y, MyColour); } } The problem here is that this takes a long time to paint as the CalculateMyPoint routine is quite an expensive method. Is there a more efficient way of painting to the canvas, for example should I draw to a bitmap and then paint the whole bitmap to the canvas on the onDraw event? Or maybe evaluate my colours and fill in an array that the onDraw method can use to paint the canvas? Users of my application will be able to change parameters that affect the drawing on the canvas. This is incredibly slow at the moment.

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  • Interface Design Problem: Storing Result of Transactions

    - by jboyd
    Requirements: multiple sources of input (social media content) into a system multiple destinations of output (social media api's) sources and destinations WILL be added some pseudo: IContentProvider contentProvider = context.getBean("contentProvider"); List<Content> toPost = contentProvider.getContent(); for (Content c : toPost) { SocialMediaPresence smPresence = socialMediaService.getSMPresenceBySomeId(c.getDestId()); smPresence.hasTwitter(); smPresence.hasFacebook(); //just to show what this is smPresence.postContent(c); //post content could fail for some SM platforms, but shoulnd't be lost forever } So now I run out of steam, I need to know what content has been successfully posted, and if it hasn't gone too all platforms, or if another platform were added in the future that content needs to go out for it as well (therefore my content provider will need to not only know if content has gone out, but for what platforms). I'm not looking for code, although sample/pseudo is fine... I'm looking for an approach to this problem that I can implement

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  • How do I draw part of parabola using iText ? Or how do I create quadratic bezier curves from cubic b

    - by drasto
    I need to draw a shape whose boundaries are parts of parabola (that is quadratic bezier curves) using iText. I have found only method for drawing cubic bezier curves in PdfContentByte class. So how do I draw quadratic bezier curves using iText ? One way would be to use method for cubic bezier curves. Is it possible to draw quadratic bezier curves as a cubic bezier curves (with 2 control points). I gues it is but I cannot make up the formula. If somebody states the formula tu "translate" cubic bezier curves to quadratic that would solve the problem. Any other ways to draw quadratic bezier(parts of parabola) curves in iText (and filled shapes made of them) is also the solution. Thanks

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  • StringTokenizer split at "<br/>"

    - by AnAmuser
    Maybe I am stupid but I don't understand why the behaviour of StringTokenizer here: import static org.apache.commons.lang.StringEscapeUtils.escapeHtml; String object = (String) value; String escaped = escapeHtml(object); StringTokenizer tokenizer = new StringTokenizer(escaped, escapeHtml("<br/>")); If fx. value is Hej<br/>$user.get(0).name Har vundet<br/><table border='1'><tr><th>Name</th><th>Played</th><th>Brewed</th></tr>#foreach( $u in $user )<tr><td>$u.name</td> <td>$u.played</td> <td>$u.brewed</td></tr>#end</table><br/> Then the result is Hej $use . e (0).name Ha vunde a e o de ='1' h Name h h P ayed h h B ewed h #fo each( $u in $use ) d $u.name d d $u.p ayed d d $u. ewed d #end a e It makes no sense to me. How can I make it behave as I expect to.

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  • JScrollPanel without scrollbars

    - by Erik Itland
    I'm trying to use a JScrollPanel to display a JPanel that might be too big for the containing Jpanel. I don't want to show the scrollbars (yes, this is questionable UI design, but it is my best guess of what the customer wants. We use the same idea other places in the application, and I feel this case have given me enough time to ponder if I can do it in a better way, but if you have a better idea I might accept it an answer.) First attempt: set verticalScrollBarPolicy to NEVER. Result: Scrolling using mouse wheel doesn't work. Second attempt: set the scrollbars to null. Result: Scrolling using mouse wheel doesn't work. Third attempt: set scrollbars visible property to false. Result: It is immidiately set visible by Swing. Fourth attempt: inject a scrollbar where setVisible is overridden to do nothing when called with true. Result: Can't remember exactly, but I think it just didn't work. Fifth attempt: inject a scrollbar where setBounds are overridden. Result: Just didn't look nice. (I might have missed something here, though.) Sixth attempt: ask stackoverflow. Result: Pending. Scrolling works once scrollbars are back.

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  • Focused animation on custom JDialog

    - by n002213f
    If a JFrame has a JDialog modal open, the JDialog is animated (the borders and title bar have a lighter colour) if any other part of the application is clicked other than the JDialog with focus. The user is made aware of the window in focus to attend to first. I have a Swing application with custom dialogs, setUndecorated(true) and custom title bars. Is it possible to implement the behaviour described above for these custome dialogs?

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  • How to properly close a socket after an exception is caught?

    - by marco
    Hello, after my last project I had the problem that the client was expecting an object from the server, but while processing the clients input an exception that forces the server to close the socket for security reasons is caught. This causes the client to terminate in a very unpleasant way, the way I decided to deal with this was sending the client a Input status message after each recieved input so that he knows if his input was processed properly or if he needs to throw an exception. So my question: Is there a better/cleaner way to close the socket after an exception is caught?? thanks,

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  • Adding a JLabel to JLayeredPane from event listener not dragging.

    - by Cody
    Ok, So for some reason When I add components to a JLayeredPane in its constructor: JLabel label = new JLabel(); label.setSize(100,100); label.setText("This works"); add(label); It works perfectly fine, but If a add it later in the JLayeredPane's parent EDT it doesnt let me move the objects around but they let me see the objects. Adding from EDT: JLabel label = new JLabel(); label.setToolTipText(url.getHost()); label.setIcon(icon); label.setBorder(new LineBorder(null)); label.setSize(icon.getIconWidth(), icon.getIconHeight()); dressFrame.layeredPane.add(label, JLayeredPane.DRAG_LAYER); Dragging method: Component c = findComponentAt(e.getX(), e.getY()); if (c instanceof JLayeredPane) { pieceSelected = false; return; } Point parentLocation = c.getLocation(); xAdjustment = parentLocation.x - e.getX(); yAdjustment = parentLocation.y - e.getY(); movingPiece = c; movingPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment); pieceSelected = true;

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  • Swingworker producing duplicate output/output out of order?

    - by Stefan Kendall
    What is the proper way to guarantee delivery when using a SwingWorker? I'm trying to route data from an InputStream to a JTextArea, and I'm running my SwingWorker with the execute method. I think I'm following the example here, but I'm getting out of order results, duplicates, and general nonsense. Here is my non-working SwingWorker: class InputStreamOutputWorker extends SwingWorker<List<String>,String> { private InputStream is; private JTextArea output; public InputStreamOutputWorker(InputStream is, JTextArea output) { this.is = is; this.output = output; } @Override protected List<String> doInBackground() throws Exception { byte[] data = new byte[4 * 1024]; int len = 0; while ((len = is.read(data)) > 0) { String line = new String(data).trim(); publish(line); } return null; } @Override protected void process( List<String> chunks ) { for( String s : chunks ) { output.append(s + "\n"); } } }

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