java-programmer >>Intersystems Cache'

Intersystems Cache' - Anyone use it?

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- 1
  - Eclipse, Motif or x86/GTK2 FOR MANDRAKE 9.. Installation problemI have Mandrake 9.0 and I downloaded Motif version of eclipse,
    but after I unziped, set the PATH and started:
    Eclipse -data /home/mario/Documents/eclipse/
    I got a message that startup.jar is not in the same directory
    as its executable.
    What can be wrong?
    What version, Motif or GTK 2 I need for Mandrake 9.0
    
    --
    dk
- 1
  - JAR files and manifest: Class-PathHi!
    
    I have a base dir, where the application JAR file resides. In this base
    dir, there's also a lib dir, nothing special really. In this lib dir are
    some user look and feel JAR files, which are supposed to be loaded when
    the application is started via the JAR file.
    
    Is there any way to use the Class-Path entry in the manifest, so that it
    scans that ./lib directory and loads all the JARs in there, *without
    knowing up-front, what these files are*?
    
    I tried
    
    Class-Path: ./lib
    Class-Path: ./lib/
    Class-Path: ./lib/*
    Class-Path: ./lib/*.jar
    
    but none of them work.
    
    Maybe there's some other way, which I don't know of. I simply don't want
    to explicitly deploy the JAR's (versions, size etc.).
    
    Anyway, how do I do it?
    
    Karsten
- 6
  - Synchronization ProblemHello,
    
    I have created an simple cache class, that allows items to be
    added to HashMap. Every public method that uses that map,
    is protected with synchronized keyword. The class also contains
    an handleNotification method that is called periodically. This method
    iterates over the map and refreshes the values in the map. The problem
    is that when I test this class with Junit test i get
    java.util.ConcurrentModificationException.
    I don't understand why, because the handleNotification method is also
    synchronized.
    I managed to solve the problem using Doug Lea's java.util.concurrent
    package, but
    I would like to know why my test fails.
    
    Best regards,
    
    - Sami Lakka
    
    Heres the code :
    public synchronized void handleNotification() {
    
    try {
    
    Set keys = cache.keySet();
    
    Iterator iter = keys.iterator();
    
    while (iter.hasNext()) {
    
    String tagName = (String) iter.next();
    
    IItem item = backEnd.read(tagName);
    
    cache.put(item.getTagName(), item); // Adds the item to the cache
    
    }
    
    } catch (ItemNotFoundException e) {
    
    e.printStackTrace();
    
    }
    
    public void testHandleNotification() {
    
    MockBackEnd backEnd = new MockBackEnd(3);
    
    Cache cache = new Cache(backEnd);
    
    IItem itemA = new Item("A");
    
    IItem itemB = new Item("B");
    
    IItem itemC = new Item("C");
    
    cache.addItem(itemA);
    
    cache.addItem(itemB);
    
    cache.addItem(itemC);
    
    // (1)
    
    cache.handleNotification(); // ERROR in here.
    
    backEnd.verify(); // Causes the mock to verify that method calls were made
    
    // (2)
    
    int size = cache.getSize();
    
    Assert.assertTrue("Size is incorrect.", size == 3);
    
    Assert.assertTrue("Item's value wasn't modified correctly by the backend",
    
    cache.getItem("A").getValue().equals("MockValue : A"));
    
    Assert.assertTrue("Item's value wasn't modified correctly by the backend",
    
    cache.getItem("B").getValue().equals("MockValue : B"));
    
    Assert.assertTrue("Item's value wasn't modified correctly by the backend",
    
    cache.getItem("C").getValue().equals("MockValue : C"));
    
    }
- 7
  - Chart bar 3DHi,
    
    I'm using JFreeChart with very good results but yet have the problem to
    generate charts 3d bar where I can set the value of the three axis values
    for the visualization.
    Can any help me or tell where can I find a freeware library or applet.
    
    Thank you in advance
    Markus
- 7
  - RMI Objects HelpHi,
    
    I'm having a little problem with compiling the RMI Stub. Getting the
    following error. Have attached all relevant source code below. Hope
    someone can help!
    
    Thanks,
    Rajat
    
    ERROR
    ======
    D:\Projects\TreeServer\TreeServer_Stub.java:6: class
    TreeServer.TreeServer_Stub must be declared abstract. It does not
    define java.lang.Object getChild(char, TreeServer.Nodes, short,
    java.lang.String) from interface TreeInterface.TreeInterface.
    public final class TreeServer_Stub
    
    ===========
    TreeServer.java
    ===========
    package TreeServer;
    
    import java.rmi.Naming;
    import java.rmi.RMISecurityManager;
    import java.rmi.RemoteException;
    import java.rmi.server.UnicastRemoteObject;
    
    import TreeInterface.*;
    
    public class TreeServer extends UnicastRemoteObject implements
    TreeInterface {
    static final long serialVersionUID = 10000;
    
    NodeManagement nm = new NodeManagement();
    
    public static void main(String[] args) {
    try {
    if (System.getSecurityManager() == null) {
    System.setSecurityManager(new RMISecurityManager());
    }
    TreeServer q = new TreeServer();
    Naming.rebind("rmi://localhost/TreeService", q); // sets the
    // handle
    System.out.println("Start Main RMI Server");
    } catch (RemoteException er) {
    System.out.println("Exception in Main RMI Server: " + er);
    } catch (Exception err) {
    System.out.println("Exception occurred: " + err);
    }
    }
    
    public TreeServer() throws RemoteException {
    // do the init here.
    super();
    }
    
    public Nodes getChild(char c, Nodes nod, short difficulty, String
    dictionary)
    throws RemoteException {
    return nm.getChild(c, nod, difficulty, dictionary);
    }
    }
    
    =============
    Nodes.java
    =============
    
    package TreeServer;
    
    public class Nodes{
    public char letter;
    
    public int first_Child_offset = 1000;
    
    public boolean isTerminal = true;
    
    public boolean isLastSibling = true;
    
    public int NodeNo;
    
    public Nodes() {
    
    }
    
    public Nodes(int NodeNo, char letter, boolean isTerminal,
    int first_Child_offset, boolean isLastSibling) {
    this.NodeNo = NodeNo;
    this.letter = letter;
    this.isLastSibling = isLastSibling;
    this.first_Child_offset = first_Child_offset;
    this.isLastSibling = isLastSibling;
    this.isTerminal = isTerminal;
    }
    }
    
    =================
    NodeManagement.java
    =================
    
    package TreeServer;
    
    import java.io.*;
    import java.util.*;
    
    public class NodeManagement {
    
    public NodeManagement() {
    }
    
    public Nodes getChild(char c, Nodes nod, short difficulty, String
    dictionary) {
    
    /// this returns a node object. code is just too big to paste here.
    }
    
    }
    
    =============
    TreeInterface.java
    =============
    
    package TreeInterface;
    
    import java.rmi.*;
    import TreeServer.*;
    
    public interface TreeInterface extends java.rmi.Remote {
    
    public Nodes getChild(char c, Nodes nod, short difficulty, String
    dictionary)
    throws RemoteException;
    }
    
    ============
    TreeClient.java
    ============
    
    package TreeClient;
    
    import java.rmi.*;
    
    import TreeInterface.*;
    import TreeServer.Nodes;
    
    public class TreeClient {
    TreeInterface rq;
    
    public TreeClient() {
    try {
    rq = (TreeInterface) Naming.lookup("rmi://localhost/TreeService");
    } catch (Exception e) {
    e.printStackTrace();
    }
    }
    
    public Nodes getChild(char c, Nodes nod, short difficulty, String
    dictionary) {
    try {
    return rq.getChild(c, nod, difficulty, dictionary);
    } catch (Exception e) {
    return (new Nodes());
    }
    }
    }
- 7
  - ArrayList vs VectorI remember reading a while back about the hazards of using Vector for a
    dynamic array. However, in the latest javadocs, I've been reading that
    Vector has been "retrofitted" for the Collections and is also synchronized.
    Does Vector still have a bad rap? Should I be looking at the ArrayList
    instead all the time and ditch Vector? When is a good time to use one over
    the other? What are your design questions/decisions? As far as I can tell,
    they are pretty much equal, but I'm just learning, so I'm asking what you
    people think. Thanks.
- 8
  - Performance evaluationHi,
    
    I'm looking for a tool (library, framework, stand-alone application,
    whatever) which can compare the performance of two classfiles.
    
    I'm currently developping a (very) small compiler for java and I'd like to
    compare different optimisations.
    
    I heard that JMeter was a very good tool, but it seems to me that it's more
    appropriate for a server environment which I don't have (and don't need).
    
    So, could you advise me other performance evaluation tools ?
    
    Thanks in advance,
    Dasch
- 8
  - [OT] Outsourcing: Real Or Bullshit ?
    Do you think all this /outsourcing/ stuff is a bunch of *management*
    bullshit to keep salaries down ( and increase their salaries at the
    expense of the staff )?
    
    I see demand being really high this year and in the next few.
    
    It's kind of like that bullshit Boeing pulled saying they were going to
    build the 7E7 elsewhere and making up a phoney bid process and then
    getting Washington to concede all this money and then picking Everett.
    
    --
    W '04 <:> Open Source
- 8
  - Servelets or Applets, or ...Hi,
    
    I am relatively new to JAVA but I am trying to build contact management
    system which would allow users to create their list of contacts. The contact
    data would be in database and security is important issue. I was initially
    thinking of using servlets/jsp but than it occurred to me that there might
    be other technologies in JAVA which could be better suited to what I need to
    accomplish.
    
    The application should allow user to search based on different criteria,
    should also provide interface for inputting new contacts. Also it should
    allow some level of sharing data in cases it is used on a company level
    where many users have common contacts.
    
    If you have a good idea of what technology would work best for my
    application please email me justifying your suggestion so that I can
    understand where you are coming from.
    
    Any replies would be appreciated.
    
    Thanks,
    Don
    
    --
    High achievement always takes place in the framework of high expectation.
    - Charles F. Kettering
- 8
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- 9
  - Using JNI in a ServletDoes anyone have experience with using JNI in a servlet under Windows
    XP? When trying to do this, it continually fails to load the C
    library.
    It works when done in a normal Java program, but not when it's a
    servlet.
    I've seen that others have used JNI in Servlets and had this problem
    with Windows, but no explanation on how to work around the problem.
    
    I also have problems running javah. It's not required, but it does
    work
    as a precursor; if javah doesn't work, the library won't load either.
    
    Here's a quick rundown of the setup and errors. I'ms using Java 1.5
    with the Sun App Server on a Windows XP SP2 system, compiling the C
    code
    with gcc v3.3.3. CLASSPATH is set to inculde all directories the files
    and libs reside.
    
    When running the servlet, the following errors show up in the App
    Server
    log file:
    
    Logger: javax.enterprise.system.stream.err
    Name-Value Pairs: _ThreadID=29;
    Message ID: Link error
    Complete Message java.lang.UnsatisfiedLinkError: no jni_if in
    java.library.path
    
    Logger: javax.enterprise.system.stream.err
    Name-Value Pairs: _ThreadID=12;
    Message ID:
    Complete Message Exception in thread "Thread-79"
    
    Logger: javax.enterprise.system.stream.err
    Name-Value Pairs: _ThreadID=30;
    Message ID: java.lang.UnsatisfiedLinkError
    Complete Message getXppParm
    at xpserv.XppIf.getXppParm(Native Method)
    at xpserv.XppIf.run(XppIf.java:61)
    
    Running javah gets the following error:
    
    bash-2.05b$ javah -jni XppIf
    error: cannot access XppIf
    bad class file: C:\BioSpring\xpserv\XppIf.class
    class file contains wrong class: xpserv.XppIf
    Please remove or make sure it appears in the correct subdirectory
    of the classpath.
    com.sun.tools.javac.util.Abort
    :
    
    Running javah with the package name included in the name still fails:
    
    bash-2.05b$ javah -jni xpserv.XppIf
    error: cannot access xpserv.XppIf
    file xpserv\XppIf.class not found
    javadoc: error - Class xpserv.XppIf not found.
    Error: No classes were specified on the command line. Try -help.
    
    If anybody has had any success in using JNI with a servlet, I would to
    hear how they configured it to work.
- 12
  - File CreationHi all
    I am now doing a webapplication involving servlets.i want to creat
    a dynamic view of an image.the image generated will be of type
    BufferedImage and i want to write it into a file.i have created the
    file using File class and CreateNewFile()method.but the file is not
    created on that location.can anyone tell me why is this so? also tell
    me whether wait() method will help to suspend a servlet for sometime?
    Thanks in Advance
    Regards
    Anu
- 15
  - Java EE 5 Deployment ToolIs there a deployment tool included with Java EE 5? The previous version had
    one in the bin directory of the installation directory. From what I
    understand it was pretty helpfull. It's hard to believe it would be
    eliminated in an upgrade. Does anyone know how to access it?
    
    --
    Message posted via JavaKB.com
    http://www.javakb.com/Uwe/Forums.aspx/java-tools/200608/1
- 15
  - How to print??Hello
    i have a small problem. i do not know how to print txt file in java?? i do
    want to do it through GraphicsComponent(drawString). Can somebody help me??
    
    thanks Lukasz
- 16
  - Changing contents of signed Jar ?Hi,
    
    If I want to unzip a signed jar and zip it backup after tweaking a file
    or two do I have to sign it again ? I'm not sure if the signing process
    uses the contents of the jar or not !
    
    Thanks
    
    Steve

Author

Message

Wibble

Posted: 2006-4-26 11:50:00

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java-programmer, Intersystems Cache' - Anyone use it? We're looking at this as an Oracle replacement,
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Index ‹ java-programmer

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- 1
  - Need help calling java classesHi. I am a beginner in java so i may sound like a total prat here,
    but here goes:
    
    I have been given my university coursework to do. I have to make a
    program whereby a customer ordering boxes is asked what attributes of
    a box he/she wants from list we have been given, then work out a price
    for the box. Anyhow, we have six box types, so a class for each, an
    Input class for reading input from the keyboard and a main class.
    now, obviously the program starts in main, but i need to go to the
    Input class as soon as the program starts, so i can put in some info
    from the keyboard, but my tutor says that we have to separate the main
    and input classes(whereas i can see it being easier to shove it all in
    the main class), so i need to know this: How do you call one class
    from another in java? I know how to call methods in one class:
    methodname();, but i need to access the input class from the main
    class. Is this possible or am i barking up the wrong tree? Help is
    much appreciated.
    
    Thanks
    ----------
    Stuart
- 2
  - How to obtain the right 256 color pallette for the blend of two colors...?Hi all,
    
    I have the following problem: I need to generate dynamically an image with
    IndexColorModel (256 color PNG) of a text over a solid color. The parameters
    are color foreground for the text and background. The problem is how to
    select the most appropriate 256 color pallette for the text to look best. I
    mean the text should be antialiased and any other hint applied. For example,
    If I pick black on yellow image I think it should have all the tones of
    black and yellow. Any red color will be useless and it will be lost space on
    the reduced 256 color pallette. But in this example the red could be a good
    choice for the transparent color...
    How to solve this problem?
    I guess I need some background on colors (theory of colors?) Any hint is
    welcomed.
    Thanks in advance
    Sammy
- 3
  - Internet web app - sending .PDF or .PS output direct to user printerI have a real brain-teaser here (it may not even be possible). We have
    a web app, it will run across the INTERnet (not intra). The app will
    generate reports. Currently what we do is:
    1. generate the report (over on the server, obviously) as a .pdf file
    2. once done, we forward the user to the URL of the .PDF file
    3. Since IE knows what to do with filetype .PDF, he kicks off Adobe
    Reader and loads the .PDF in the new window.
    
    For non-technology-related reasons, we can't do it this way (the user
    must not be allowed to print the output more than once, and of course
    once we dump them into Adobe Reader they can hit the Print button all
    day, no way for us to stop them).
    
    So we need to figure out how to take this output (we're generating it
    with FOP) and dump it out to the user's printer (in other words, we
    don't display the file, thereby allowing them to print multiple times;
    we simply print it). I'm thinking with the code and the output file
    over on the app server, there really isn't a way for me to direct this
    output to the printer of a user who is running our app through IE. Or
    am I wrong? If I'm right, can anyone think of another way to achieve
    this result? Thanks as always.
- 4
  - Windows install locations J2SE and TomcatI'm installing J2SE, J2EE and Tomcat (and other Servlet Containers )
    I hope I don't run into any conflicts because I notice J2EE comes with
    the AppServer, and I'll also want to use Tomcat and possibly even try
    WebSphere.
    
    I'm wary of the standard location, with a space in the path
    ....\Program Files\....
    and I can only forsee trouble from this. Any comments or suggestions
    ?
    
    I already have it installed there, and I think it would be easy to move
    ( I don't even have JAVAHOME set yet )
    Would I need to use uninstall or can I just move the whole dir
    structure, below
    jdk1.5.0_06 and then set up my path, env var's etc. ??
    
    I don't have any other pressing ? at this point, but I'll be exploring
    Tomcat too.
    I know using it as a standalone ( on port 8080 ) is a breeze, but I'm
    also curious if I can get the connectors to work, in conjunction with
    Apache Server ( any current references ? )
    I know the connectors have been improved over the last 5 years, just
    want the current setup.
    
    TIA
- 5
  - Executable Jars - why are they so rigid with classpaths ?If someone gives me a jar file with a Main in it and some supporting
    library jar files, the Manifest.mf will contain information on what
    the Main class is and also the location of supporting library jars
    RELATIVE to the application jar file. But once I get the jar, I want
    to move the supporting jar files to some other convenient directory.
    But If I do that, the application jar file will not be able to locate
    the supporting classes since the Manifest file has the supporting jar
    paths pretty much HARDCODED ! How do I override the hardcode and give
    it a different search path so that it can start looking at the new
    directory ? This rigidity makes it so painful during times of
    distribution. Please help.
- 6
  - JBoss,integrated Tomcat,Mysqltsstsc wrote:
    
    > I am new to J2ee, and have difficulty deploying them to JBOSS, can
    > anyone help?
    >
    > --
    > Posted via http://dbforums.com
    
    I'm started programming in J2EE for several months ago now.
    I'm using Eclipse (eclipse.org) as IDE.
    There's a plugin available for free that helps you starting a J2EE
    project. You can find the plugin at
    http://sourceforge.net/projects/lomboz. You can deploy your project to
    several aplication servers including JBOSS/Tomcat.
    
    That's the way I started after a bit of reading.
    
    Good luck,
    Marcel
- 7
  - houghtransformationHello,
    
    I'm looking for sourcecode for a houghtransformation (the one for line
    detection). Has anyone somethign like that?
    
    regards, Johannes Elsinghorst
- 8
  - This JComboBox does not resizes itselfHello.
    
    By the program below, I wanted to change the message "a" on the
    JComboBox
    left side into "a-changed" by clicking the "change" button.
    But all I saw was "..." because the JComboBox does not resizes itself.
    
    How can I resize the JComboBox?
    
    Thank you in advance.
    ----
    import java.awt.Container;
    import java.awt.FlowLayout;
    import java.awt.event.ActionEvent;
    import javax.swing.JButton;
    import javax.swing.JComboBox;
    import javax.swing.JFrame;
    
    public class ChangeItem extends JFrame {
    public static void main(String[] args) {
    new ChangeItem();
    }
    
    private ChangeItem() {
    setSize(300, 100);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    Combo combo = new Combo();
    cp.add(combo);
    cp.add(combo.new XButton());
    setVisible(true);
    }
    
    private static class Combo extends JComboBox {
    private Combo() {
    addItem(new Item("a"));
    }
    
    private class XButton extends JButton {
    private XButton() {
    super("change");
    }
    
    protected void fireActionPerformed(ActionEvent e) {
    Item i = (Item) getSelectedItem();
    i.displayName = i.displayName == "a-changed" ? "a"
    : "a-changed";
    Combo.this.repaint();
    }
    }
    }
    
    private static class Item {
    private String displayName;
    
    private Item(String displayName) {
    this.displayName = displayName;
    }
    
    public String toString() {
    return displayName;
    }
    }
    }
- 9
  - J2EE File Event PatternI have a design issue that I was hoping that this list could assist me
    with:
    
    I need to create a File Event Handler that is J2EE compliant.
    
    The basic requirements are:
    - Detect the arrival of a file on a particular path (including
    file masking patterns)
    - Recognize the type of file
    - Route either data stream or file reference to an appropriate
    handler. The handler will process the contents of the file.
    - Election of an instance to handle the file (the file will
    arrive on a shared drive that all instances of the app will see) to
    prevent multiple instances of the same file being processed
    
    Anyone have any good pointers or patterns to use?
    
    Thanks,
    Jeff Harman
- 10
  - Open Document Format / Rich Text Format Editor in Javahi all,
    
    I'm looking for a java class or a set of java classes with which I can
    display ( and edit ) a ODF-Document (or a RTF-Document).
    
    One requirement is that it is possible to display different fonts,
    text size, text color, text-decoration, images, tables with or without
    borders/colors , links, background color, indent, numbering, bullets
    etc.
    
    I know about the RTFEditorKit and the HTMLEditorKit from the swing
    packages ...and of their limitations.
    
    As my application will use SWT (&RCP), I'm looking for a "better"
    alternative. Does anyone of you know which classes could be of
    interest for me?
    
    Thanx for your help
    Dominik
- 11
  - Problem with Javadoc out of memory in WSAD 5.1.2Good morning,
    we are using WSAD version 5.1.2 , now we need to create the javadoc of
    our project but during he creation we have the following error :
    
    javadoc: java.lang.OutOfMemoryError: Please increase memory.
    For example, on the Sun Classic or HotSpot VMs, add the option -J-Xmx
    such as -J-Xmx32m.
    
    if I insert this line
    
    C:\Programmi\Java\jre1.4\bin\javadoc.exe -J-Xmx32m
    
    in the Preference --> Java --> Javadoc Menu we have the message
    "javadoc command not exist"
    
    how we could solve the problem using WSAD ??
    Many thanks
    
    Antonio
    www.etantonio.it/en
- 12
  - short-circuit operators - part of the spec?My book says the following about && and ||
    (see below dashed line.) And I wonder if this
    is built into the language or an artifact of the
    compiler. Previously (in my youth) we were
    taught that depending on the compiler to skip
    evaluating stuff was dangerous and bad for
    maintenance.
    ----------------------------
    known as the short-circuit logical operators:
    && short-circuit AND
    || short-circuit OR
    The short-circuit feature of the && operator is that it doesn't waste its
    time on
    pointless evaluations. A short-circuit && evaluates the left side of the
    operation first
    (operand one), and if operand one resolves to false, the && operator doesn't
    bother
    looking at the right side of the equation (operand two). The operator
    already knows
    that the complete expression can't possibly be true, since one operand has
    already
    proven to be false.
- 13
  - Can I deploy Crystal XI Java Report Component on Linux ?Hi,
    
    We are developing J2EE application and plan to deploy it on Oracle Apps
    Server on Linux, we use Crystal Report XI as report tools.
    
    We use Java Report Component for integration to jsp page.
    
    The question is : can we deploy Crystal Report XI into Apps Server on
    Linux ?
    
    Thank you for your help,
    xtanto
- 14
  - Cool new websiteBrand new site.
    
    Loads of great stuff
    
    Free membership and full access
    
    Check out Yapooh!
    
    http://www.yapooh.org
- 15
  - Filling a bitmap image with java 1.3.1I need to fill parts of a bitmap, representing European country's
    electional cantons, with different colors, one per canton. I would
    like to know what would be the best way to do it on a pure java awt
    environment.
    
    Thanks a lot.