java-programmer >>Junit tests, setting up tests without having to create a billion methods

Junit tests, setting up tests without having to create a billion methods

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- 1
  - How do fix: "Wrong number of arguments" / "invalid propert assignment" / "Invalid argument"First off, they are not java errors - they are javascript errors.
    Secondly, use Firefox and open up 'Tools->Javascript Console', which
    will give you the line number in the javascript and even take you to
    the javascript code which is causing the error when you double click
    the error message.
    
    -cheers,
    Manish
- 2
  - JMF video frame sizeI need to know dimension of the media file played by
    javax.media.bean.playerbean.MediaPlayer
    
    I use the code you can see below:
    
    FormatControl formatControl = (FormatControl)
    this.mediaPlayer.getControl ("javax.media.control.FormatControl");
    VideoFormat videoFormat = (VideoFormat) formatControl.getFormat();
    return videoFormat.getSize();
    
    mediaPlayer is known object from another class.
    
    But I get formatControl == null.
    
    It's very very strange, but just one time this code did work.
    
    So I have no idea ... Someone else?
- 5
  - A basic tomcat questionHi gang, Tomcat's not my area of expertise but I have to get some simple
    things set up -- nothing fancy.
    
    I'm having trouble getting classes & packages to work. The setup is Tomcat
    5.5.4 & JDK1.5. I can get basic servlets and JSPs to work, but I'm having
    trouble with user classes and packages. Here's an example:
    
    tomcat\webapps\ROOT\Test\TestMovie.jsp
    ----------------------------------------
    <#@ page import="testpackage" @>
    <html>
    <body>
    <% Movie m = new Movie("Gone With the Wind", 1936, 19.95); %>
    <%= m.title %>
    </body>
    </html>
    
    tomcat\webapps\ROOT\Test\WEB-INF\classes\testpackage\Movie.java
    -------------------------------------------------------------------------
    package testpackage;
    
    public class Movie
    {
    public String title;
    public int year;
    public double price;
    
    public Movie(String title, int year, double price)
    {
    this.title = title;
    this.year = year;
    this.price = price;
    }
    }
    
    I've googled this & read the documentation, everything seems to say put all
    the classes in packages, create a folder for the package under
    WEB-INF\classes, and put the class files in the package folder, and that
    should do the trick. But I must have something else missing. Any ideas?
    
    Also, I don't know if this is related, but is there a trick to using new
    featured of Java 1.5 in a JSP? I can't get the following JSP to compile:
    
    <%@ page import="java.util.*" %>
    <html>
    <head>
    <title>You're breaking my concentration.</title>
    </head>
    <body>
    <% ArrayList<String> s = new ArrayList<String>();
    %>
    </body>
    </html>
    
    It complains about the first < in the scriptlet. Does that have to be
    escaped somehow?
    
    TIA,
    
    --D
- 5
  - US-CA: Senior Software Engineers (Java) wanted Immediately!Cataphora is an award winning software company providing technology and
    services for high end litigations and investigations. Its customers
    include Fortune 500 companies, governmental agencies, and top American
    law firms. We pride ourselves on having been funded from the start
    entirely by revenues, with no venture capital investment. At Cataphora,
    your creativity and versatility will be focused on a wide variety of
    software development challenges and developing cutting-edge algorithms
    for analyzing very large datasets. We are more than 80 people strong,
    and continue to grow our employee-owned San Francisco Bay area company
    by providing superior technology to meet the needs of our customers.
    
    This is an excellent growth opportunity for the right candidate in a
    rapidly growing, self-funded pre-IPO start-up.
    
    Required Skills
    
    - At least 4 years experience dealing with middleware or enterprise
    software applications
    - 3 years of Java experience
    - Strong analytical and problem solving skills
    
    Desired Skills
    
    - Strong database experience
    - Demonstrated ability to develop algorithms for solving complex
    problems
    - Development experience with a web-based application using J2EE
    technologies
    
    To apply, please send your resume (inline preferred; RTF, Word Doc or
    PDF otherwise) to: email***@***.com - subject: "EU-DE-M09".
    
    If you have any questions, feel free to contact me:
    email***@***.com
    
    Regards,
    Markus Morgenroth
- 6
  - Focusable JPanel how?Hi,
    
    How to make JPanel gain focus and make responsible on key events?
- 7
  - Casting Object[]Hi :o)
    
    I've created a useful routine that "appends" an Object on to the end of an
    array of Object, creating a new array with slack space if there is not
    enough space available (sort of like a light-weight Vector):
    
    public static final Object[] append(Object[] buf, int buf_len, Object addxn,
    int slack)
    {
    Object[] ptr = buf;
    if (buf == null || (buf_len + 1) > buf.length)
    {
    ptr = new Object[buf_len + 1 + slack];
    if (buf != null) System.arraycopy(buf, 0, ptr, 0, buf_len);
    }
    ptr[buf_len] = addxn;
    return ptr;
    }
    
    Anyway, this works fine, no probs, etc.
    
    I am having problems, however, casting Object[] onto String[] or any other
    such cast. Even if, obviously, all the elements of the array are String.
    
    Now, I can state straight off where the problem lies. If I choose a large
    enough String[] buffer so that the appended String fits inside it, then the
    returned array can be cast back onto String[] - however, if the buffer is
    exceeded, and line 6 is executed (creating a new buffer) then it can no
    longer be cast back onto String[].
    
    Does that make sense?
    
    Anyway, the question! Is there any way of creating an Object[] array
    generically which is of the same type as the original array. In other words,
    it would create a new String[] array or Color[] or Rectangle[] or whatever
    as appropriate?
    
    Is there a way of doing it by reflection??? (perhaps)
    
    Cheers :o)
    
    And if you don't understand what I going on about, just shout! (hehe) and
    I'll try and explain better!
    
    Will
- 7
  - What is a type error?Marshall <email***@***.com> wrote:
    > David Hopwood wrote:
    > > Marshall wrote:
    
    > > > Mightn't it also be possible to
    > > > leave it up to the programmer whether a given contract
    > > > was compile-time or runtime?
    > >
    > > That would be possible, but IMHO a better option would be for an IDE to give
    > > an indication (by highlighting, for example), which contracts are dynamically
    > > checked and which are static.
    > >
    > > This property is, after all, not something that the program should depend on.
    > > It is determined by how good the static checker currently is, and we want to be
    > > able to improve checkers (and perhaps even allow them to regress slightly in
    > > order to simplify them) without changing programs.
    >
    > Hmmm. I have heard that argument before and I'm conflicted.
    >
    > I can think of more reasons than just runtime safety for which I'd
    > want proofs. Termination for example, in highly critical code;
    > not something for which a runtime check will suffice. On the
    > other hand the points you raise are good ones, and affect
    > the usability of the language.
    
    There doesn't seem to be a point of disagreement here. Programmers
    often need to require certain properties to be checked at compile-time.
    Others could go either way. There is no property that a program would
    rationally desire to *require* be checked at runtime; that would only
    occur because the compiler doesn't know how to check it at compile time.
    
    --
    Chris Smith - Lead Software Developer / Technical Trainer
    MindIQ Corporation
- 7
  - Forcing swing gui to be drawnHey, right now I have a program that analyzes an EKG when a button is
    clicked. I want to pop up a progress bar in a new frame to show how far
    it is, but I'm having problems. I can create the frame, and it will
    appear, but it won't draw the progress bar until it is done executing
    all of the other commands.
    
    I ahve tried opening the frame with a separate thread, but it resulted
    in the same problem. I guess there must be some draw queue that is on a
    low priority, but I really have no idea why it isn't working.
    
    Any help would be great... I show this at a science fair in 2 days.
    Thanks!
    
    -Thomas
- 9
  - Simple While Loop problemJohn wrote:
    > ththx.
    >
    > the code is wrong. months will be determined by the loan amount not just an
    > arbitary number
    >
    >
    > cheers
    >
    >
    Can you not top-post please, John? It makes threads very hard to follow...
    
    alex
- 9
  - URL in IFRAMELet's say I have a struts action at http://xyz.com/someAction.do and this
    URL is referred from one IFRAME via "src" attribute of IFRAME. Is it
    possible for me to detect inside someAction.do which page is embedding it in
    an IFRAME? How can I do this?
    
    et me put question in a different way, if I refer to Google API with this -
    
    code:
    ------------------------------------------------------------------------------
    
    <script
    src="http://maps.google.com/maps?file=api&v=2.x&key=ABQIAAAAHuQre3TX-ZKoHs97iqelnBQn09xNixTqt4LnUZ12n-xJURxIHRRdLvNa4xtUwCJO0gkyTjCSRjfctQ"
    type="text/javascript">
    ------------------------------------------------------------------------------
    
    How does it know that the request is coming from domain xyz.com? It is not
    purely based on the key - if I send same key from another domain, it doesn't
    work! So how can I do that? Which header do I use? The referer header is
    returned as null!
    
    - manish
- 12
  - [POLL] Dropping support for old SpiderMonkeysHi,
    
    as JavaScript.pm development is moving again I'm considering dropping
    support for older SpideyMonkey and focusing on 1.7 and later (the one
    used in FF 2.0).
    
    Instead on having to download and install SM manually I was planning
    on putting up a source release of the SM 1.7 engine on my server and
    add the possibility for Makefile.PL to download and install it.
    Alternatively I can bundle the source with JavaScript.pm. You will
    still however have the possibility to build against your own SM src.
    This way we can better control availability of utf8, threading and
    e4x (and future stuff too).
    
    Does this sound like a good idea?
    
    Thanks
    /Claes
- 12
  - encrypted source file support in jdk?Hi
    
    I an wondering if anybody knows if its possible to extend the
    functionality of the sun java compiler/vm in jdk6, with for example
    plugins or similar? or if the jdk supports something similar already?
    
    What I am looking for is to set up a jdk environment where the source
    code is ecrypted at the file level. This requires javac to be able to
    en-/decrypt the source files. For further protection, the jvm would need
    such support as well.
    
    some details:
    
    To answer the typical question first. For this scenario I am not
    interrested in encrytpted filesystems, because it still leaves the
    files vulnerable as long as the filesystem is mounted. The secrecy of
    the files can still be compromised from hacking, virus, trojans, skype,
    xss and all other sorts of system hacking. With encrypted files the
    information in the files are still protected, even in the case a trojan
    sends a file by email to somebody on the internet. Enctrypted
    filesystems only help protect the integrity of the local system and the
    disk while the system/disk is not running. Encrypted files help protect
    the information during use as well.
    
    I know there are many other issues as well, I'll be working throuhg it.
    here is the list of the issues of most importance:
    
    - en-/decryption support in
    - ide / editor
    - compiler
    - code searching tools
    - disassembler/debugger
    - remove excess information from class files
    - how to handle static content files
    - html, css, jsp, configuration files for libraries and frameworks etc
    - if class files are also encrypted
    - en-/decryption support in the jvm runtime, covers tomcat, jboss etc.
    - possible encrypted jar/war/ear files etc
    - debugger
    - information about classes must also be protected from prying
    eyes who have obtained the class files and using the debugger to get
    information.
- 13
  - How to convert Java class to exe files for performance?I have developped a java application (no awt involved) for my school research.
    It's basically a scientific calculation program, which has huge loops.
    Now it's very slow to run it in java/JIT.
    
    I'd like to know if there are some existing free program to translate java
    code(or class) to C code(or exe) since rewrite my code in C will take too long.
    
    Has anyone used samilar converter before? Any suggestion is appreciated.
    
    Thanks,
    
    Wei
- 14
  - Response cache on the application serverIs it a good thing to cache the search result?
    
    The metadata for our system can be as much as 100,000
    I am trying to enable the response cache on the web server.
    
    However, I am thinking about the problem i might meet.
    
    When you cache the search result, is it possible the other
    person throw the same condiiton and see the same result?
    With our system there some security set for each row, so
    if this happens there is a security leak.
    
    MD
- 14
  - Bound Threads (Re: Process vs Thread: what are the consequences?)On Tue, 13 Nov 2007 16:04:12 +0000, Kenneth P. Turvey wrote:
    
    > Just based on some experimentation I was doing, this doesn't seem to be
    > true. I'm running Linux with the Sun JVM, and it didn't map each Java
    > thread to a native thread until the Java thread was spending enough time
    > executing. I was actually trying to get this mapping (1 to 1) and found
    > it impossible to guarantee under Linux with the Sun JVM.
    >
    > Under Solaris there is the -XX:UseBoundThreads (or something similar) to
    > get that behavior, but under Linux no such option exists.
    >
    > I will freely admit that my experiment could have been flawed, but it
    > wasn't behaving as if it was using more than a single native thread. I
    > suspect that the article above is out of date.
    
    I hate to followup my own post, but I've been looking at this problem
    again and I'm really just unhappy with how it works. Since this can so
    easily be solved under Solaris, and Lew (I think?) mentioned that this is
    all JVM dependent. I was hoping somebody could point me to a JVM that
    runs under Linux that supports the -XX:UseBoundThreads option or something
    similar. I want a 1:1 mapping between native threads and Java threads and
    I just can't seem to get it.
    
    Does anyone have any idea? (BTW, I checked IBM's JVM).
    
    --
    Kenneth P. Turvey <email***@***.com>

Author

Message

Andrew McDonagh

Posted: 2006-2-16 7:01:00

Top

java-programmer, Junit tests, setting up tests without having to create a billion methods James McGill wrote:
> On Wed, 2006-02-15 at 19:42 +0000, Andrew McDonagh wrote:
>
>>email***@***.com wrote:
>>
>>>Is there a more dynamic way of setting up tests? We have legacy test
>>>code that we are trying to convert to junit.
>
>
> I really enjoyed using Fitnesse. A whole different idiom for testing,
> but very flexible and accessible to nonprogrammers.
>
> http://fitnesse.org/
>
>
> Anyway, it sounds like you're working backwards. You've already written
> the code you want to test, which is backwards from TDD, which sort of
> means JUnit isn't exactly the right tool for what you're doing. Still
> it occurs to me that you should be able to automatically generated
> wrappers for your legacy tests, and put those into a testsuite, and be
> done with the legacy stuff and move forward with JUnit.
>
>
>

Hi James,

You seem have have attributed the OPs remarks to me...

That being said, the OP is specifically talking about the case where we
have a legacy code base which wasn't tested with Junit - not that it
wasn't tested. There's no mention of whether TDD was used or not -
though I think we both suspect it wasn't and that the code base was
merely Unit Tested.

Unfortunately, working with legacy code is currently the most common
starting point on projects that adopt TDD. Greenfield projects using TDD
are still rare.

Also, keep in mind, whilst JUnit was developed as a tool to Aid TDD,
Beck et al do realise that some people won't or can't do TDD but still
need a decent Unit Testing tool.

As I'm sure you know - but as an aid for others - TDD is not Unit Testing.

TDD is actually a design methodology that happens to use unit tests to
describe the design. Much like RUP uses UML, etc. In fact this usage of
the term Test has causes so many to concentrate on the testing side of
TDD that some are now starting to question whether a better name could
be found.

e.g.
Behavior Driven Development (http://behaviour-driven.org/)
Specification Driven Development
etc.

Andrew

Index ‹ java-programmer

Next
- 1
  - JVM sourcesHi,
    
    Where can I find C sources for JVM 1.4 for Windows ?
    
    Thanks
    
    Xavier
- 2
  - jigsaw's jdbmI like that I can use the jigsaw outside if jdbm. For
    writing j2me (personal java) that don't have any sort
    of record manager on the device I want to also use
    jdbm there. However jdbm requires some of the file
    classes that are not universally available within
    j2me. I don't have the error posting just now (stupid
    me) from javac to show what's missing. Has anyone
    worked through this or have another idea for an
    embedded data (flatfile) manager for j2me?
    
    Mike
- 3
  - Returning a reference to an objectHi,
    
    I've created a class to implement a state machine, so it's got a State
    attribute. It has algo got a private java.util.Stack attribute.
    
    In order to work, State classes need to access the stack to push and pop
    data, etc.
    To access it from State, I have wrote a method called getStack() which
    returns a reference to the stack, but I think this is not recommended
    beacause all objects sharing the reference can modify it, and led to errors
    difficult to debug, etc. Returning a stack's clone is not valid solution,
    as I have to make changes on the real one.
    
    So my question is, is there a cleaner way to do this?
    
    Thank you very much
    
    --
    
    PGR
- 4
  - Java application help?????????????How do you create a pause in a Java application that requires you to
    press a key to continue until the conditional statement is complete?
    The folowing is what I have so far..
    
    class Count{
    public static void main(String[] arguments) throws Exception {
    
    int a = 100;
    int b = 20;
    int x;
    
    for (x = 0;x < a;x++) {
    
    System.out.println((x+1) + "." + "Message goes here to be displayed
    100 times.");
    
    }
    
    I would like the application to display 1 - 20 then pause and display
    20 more and 20 more and so on. I tried to use System.in.read();, but
    it only displayed two at a time. Please Help.
- 5
  - looking for some hands on experience... i have bought and read LEARNING JAVA by niemeyer
    i loved it but find i need some hands on experience.
    any help?
    
    kevin
    
    --
    Sometimes I'm in a good mood.
    Sometimes I'm in a bad mood.
    When all my moods have cum to pass
    i hope they bury me upside down
    so the world can kiss me porcelain,
    white, Irish bottom.
- 6
  - Run Excel Macro from JavaI want to run the macro present inside the excel sheet using the Java
    code. Is is possible using Java code? Please help
- 7
  - Hibernate, connection pool and firewall questionAn odd combination of topics, to be sure.
    
    My current web application (Tomcat hosted) has a custom-rolled
    connection pool. The Informix DB I connect to is across a firewall
    that terminates existing connections after 120 minutes, regardless of
    their current activity. My pool handles this by detecting the
    creation date of a connection it wants to reuse. If that connection
    was created > 60 minutes ago it closes the connection and fetches a
    replacement to use in the pool.
    
    Simply using a connection until the 120 minute barrier is reached
    isn't acceptable because the DB isn't smart enough to realize that the
    firewall has stopped the connection's use. The explicit release after
    60+ minutes releases the connection and keeps the simultaneous
    connection use down (we are licensed by the number of simultaneous
    connections).
    
    When I look at Hibernate and its connection pools (DBCP and C3P0,
    there might be others) I'd like to use their stuff instead of my
    home-grown pool. But I don't really see a parameter like "only use
    this connection for 60 minutes" or such. Can I find such a parameter
    in one of the pool possibilities?
    
    TIA,
    Jerome.
- 8
  - Read the index of item with X value.On Mar 26, 10:42 pm, "Mariano" <email***@***.com> wrote:
    > I've a ComboBox ..
    
    >From where? There is no ComboBox in the JSE.
    Are you perhaps referring to java.awt.Choice,
    or javax.swing.JComboBox?
    ..
    > How could I resolve?
    
    1) Be specific about the classes used, rather
    than simply 'making the names up, as you go along'
    2) ..
    
    Andrew T.
- 9
  - Python and cellular automata (It works this time!)I thought people would be interested in this little script I wrote to
    reproduce the 256 simple automata that is shown in the first chapters
    of "A New Kind of Science". You can see a few results without running
    the script, at http://cooper-j.blogspot.com . And here is the code (You
    will need PIL (Python Imaging Library)):
    <code>
    import Image
    
    # Contract:
    # To simulate simple cellular automata.
    
    class calculations:
    def __init__(self,which):
    self.against = self.array_maker_2()[which]
    self.check = self.array_maker_1()
    self.array = self.array_maker_3(311)
    self.calculator()
    
    def binary(self, n, size): ## This is the Int -> str(BINARY)
    converter
    assert n >= 0
    bits = []
    while n:
    bits.append('01'[n&1])
    n >>= 1
    bits.reverse()
    result = ''.join(bits) or '0'
    for iteration in range(len(result),size):
    result = "0" + result
    return result
    
    def array_maker_1(self): # This makes the array that represents the
    8 different permutations of 3 cells. Itself, its left and its right.
    return [self.binary(n, 3) for n in range(8)]
    
    def array_maker_2(self): # This makes the array that represents
    every single different rule. If for instance the second element in one
    # of these rules is 1, then the corresponding permutation that may
    be found in the result array (array_maker_3), will be 1 (black).
    return [self.binary(n, 8) for n in range(256)]
    
    def array_maker_3(self, y): # This is the array for all the
    results. The automaton starts from the middle of the first row
    x = [["0" for x in range((2*y)+1)] for n in range(y)]
    x[0][(2*y+1)/2] = "1"
    return x
    
    def calculator(self): # This cycles over all of the cells, and
    scans one row at a time, and changes the next row according to the
    current cell.
    self.buff_result = ["0","0","0"] # This is the current permutation
    buffer to be checked against the corresponding arrays.
    for i in range(len(self.array)-1):
    for j in range(1, len(self.array[0])-1):
    self.step1(j,i)
    self.step2(j,i)
    self.step3(j,i)
    y = self.check.index(''.join(self.buff_result))
    self.array[i+1][j] = self.against[y]
    
    # The steps update the result buffer.
    def step1(self, step, y):
    self.buff_result[0] = self.array[y][step-1]
    
    def step2(self, step, y):
    self.buff_result[1] = self.array[y][step]
    
    def step3(self, step, y):
    self.buff_result[2] = self.array[y][step+1]
    
    for number in range(256):
    objo = calculations(number)
    x = objo.array
    y = []
    for num,zo in enumerate(x):
    for com,wo in enumerate(zo):
    x[num][com] = int(wo)
    
    nim = Image.new("1", (623,311))
    
    for n in x: #converting the array of arrays into a single array so
    putdata can take it.
    for p in n:
    y.append(p)
    nim.putdata(y)
    nim.resize((6230/2,3110/2)).save("output" + str(number) + ".png")
    print number
    </code>
- 10
  - Open source Java on the way! (Re: BEA Weblogic blows away .NET, other J2EE servers in review by PC magazine)"codewriter" <email***@***.com> wrote in message news:<Swd1b.4631$email***@***.com>...
    > Java days are numbered. Dot Net is going to take over. This is the reality.
    > So, you guys better get some C# books before it is too late.
    > Amen.
    
    ROTFLOL!
    
    how many times did i hear this from j++ guys awhiles back, and even
    from some ASP and COM jocks in AT&T (where i worked) in 1997(?) or so.
    guess what happened? i'm still laughing my way to the bank and they're
    trying to figure out c#/vb.net - the old microsoft treadmill,
    methinks....
    
    http://www.angrycoder.com/article.aspx?cid=1&y=2003&m=7&d=17
    
    believe me, java will still be here years from now when microsoft has
    moved on to the next BIG THING (dragging along all the developer
    baggage for the ride - most of whom will be c#/vb.net developers in
    india, no doubt).
    
    in the meantime, some interesting news:
    
    it seems sun may not be so stupid after all, and is working very
    closely with open source organizations like apache and red hat to
    spread java.
    
    after apache announced a few weeks ago that it would be creating its
    own open source J2EE app server, red hat announced that it was
    planning on an open source java, with sun's blessing.
    
    http://www.freeroller.net/page/kalimantan/20030822#red_hat_and_sun_to
    
    methinks microsoft is in very big trouble.
- 11
  - eclipse, integrating crystal reports plugin with rcp appHello,
    I have got a problem, I have to integrate Crystal Reports plugin with
    my RCP app. I want Crystal Reports perspective aviable in my
    application.
    I've downloaded crystal reports plugin, and unpacked it to my_rcp_app
    \plugins,
    and I've run eclipse with -clear flag. but crystal reports plugin
    isn't visible in Plug-In details window.
    How can I cope with that problem ?
    Is the any tutorial, or sth. about integrating plugins with RCP app ?
    
    thanks a lot for any help
- 12
  - Getting ready for 1.5I'd like to prepare for JDK 1.5. I know that generics/templates
    will be in there. Will standard Java classes be retofitted to
    use this new feature as appropriate? I'm thinking of course
    about the collections, but also wondering about stuff such as
    the clone interface.
    
    I also know that enums will be in there. (Because the bug status
    changed to closed/fixed.) But in what form? There were at least
    two JSRs for that last time I checked.
    
    Thanks!
    
    -Wayne
- 13
  - Licence code storing for java appHello,
    
    I want to create a app which will have something similar to licence
    (i.e. user have to enter licence code to run the app). The problem
    arises when I want to make it that user have to specify it only once.
    So I need to store somewhere the information, that the app has already
    been activated. I am thinking about main jar file (as something which
    can work ,although it is nothing sophisticated), but when I add extra
    characters at the end then my jar was corrupted :(. Do you know any
    nice way to do this:)? Thank you!
    
    Regards, mark
- 14
  - TRYING TO CREATE A SIMPLE FORM. HELP HELP HELP!!!!trying to make a simple form, just an empty window with no button.
    
    ive tried this
    
    import javax.swing.*;
    import java.awt.*;
    import java.util.List;
    import java.util.*;
    
    public class Canvas
    {
    
    private static Canvas canvasSingleton;
    
    public static Canvas getCanvas()
    {
    if(canvasSingleton == null) {
    canvasSingleton = new Canvas("BlueJ Shapes Demo", 300, 300,
    Color.white);
    }
    canvasSingleton.setVisible(true);
    return canvasSingleton;
    }
    
    }
    
    but it doesnt work :( any ideas guys?
- 15
  - Axis e Web ServiceSalve,
    sto realizzando un applicazione Java che utilizza un Web Service con
    Eclipse 3.2.
    Questo Web Service ha il compito di salvare un oggetto su database
    MySQL facendo uso delle librerie di Hibernate 3.1.3.
    L'applicazione gira su un server Tomcat 5.5 che fa uso delle librerie
    j2sdk1.4.2_10 e utilizza librerie di Axis 1.4 per i Web Service.
    L'applicazione ?in realt?costituita da un applicazione client che
    richiama il Web Service ed un applicazione server che si preoccupa di
    salvare gli oggetti sul database. Eseguendo il client ottengo il
    seguente errore:
    
    AxisFault
    faultCode:
    {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
    faultSubcode:
    faultString: java.lang.reflect.InvocationTargetException
    faultActor:
    faultNode:
    faultDetail:
    {http://xml.apache.org/axis/}hostname:notebook-pc
    
    java.lang.reflect.InvocationTargetException
    at
    org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222)
    at
    org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129)
    at
    org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1712)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:667)
    at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
    at
    org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
    at
    org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
    at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
    at org.apache.axis.Message.getSOAPEnvelope(Message.java:435)
    at
    org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
    at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206)
    at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
    at org.apache.axis.client.Call.invoke(Call.java:2767)
    at org.apache.axis.client.Call.invoke(Call.java:2443)
    at org.apache.axis.client.Call.invoke(Call.java:2366)
    at org.apache.axis.client.Call.invoke(Call.java:1812)
    at source.Start.main(Start.java:42)
    
    In particolare ho notato che questo si verifica nel momento in cui si
    invoca un metodo chiamato "save" messo a disposizione da Hibernate. Se
    commetto la riga corrispondente a tale istruzione, richiedendo al web
    service di restituire semplicemente una stringa, l'applicazione
    funziona correttamente. Suppongo che il problema derivi dal database
    MySQL, ma non capisco di cosa si tratta. Avete qualche idea?