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ptc-9533431-Visitor
1-Visitor
June 3, 2011
Question

Configuring java samples

  • June 3, 2011
  • 13 replies
  • 2401 views
I'm trying to use Java with Arbortext rather than my more typical ACL use.
So I'm trying to get the java samples compiled and running before I start
anything new.

So I've copied the java source files to my custom/classes folder and have
compiled them there with the aom.jar file. i try to run the Hello world
example as instructed in the readme file and it fails. So the instructions
say to use

eval java_static('Hello','sayHello')

I get an empty window and the message line indicates that it

"Cannot load class Hello because a dependent class was not found"

When I look at the javaclasspath setting I see this:

C:\work\custom\classes;C:\Program
Files\Arbortext\Editor53\custom\classes;C:\Program
Files\Arbortext\Editor53\adapters\com.ptc.prowt.arbortext\classes;C:\Program
Files\Arbortext\Editor53\adapters\com.ptc.prowt.arbortext\classes\wnc2ati.jar;C:\Program
Files\Arbortext\Editor53\adapters\com.ptc.prowt.arbortext\classes\atimport.jar;C:\Program
Files\Arbortext\Editor53\adapters\com.ptc.prowt.arbortext\classes\ape_wc.jar;C:\Program
Files\Inmedius\Horizon\classes\Horizon.jar;C:\Program
Files\Inmedius\Horizon\classes\Utils.jar;C:\Program
Files\Inmedius\Horizon\classes\commons-codec-1.3.jar;C:\Program
Files\Inmedius\Horizon\classes\commons-httpclient-3.1-beta1.jar

So I have placed my class files in both of these locations with no
difference: C:\work\custom\classes;C:\Program
Files\Arbortext\Editor53\custom\classes

I don't have a clean Arbortext only environment as you can see the
Inmedius files on the path, is there some standard Arbortext entry missing
for the AOM.jar or something else?

I've been trying to modify the path and I see that
append_javaclass_path("C:\work\custom\classes2") is supposed to add new
locations to the end of the class path, but when I run this and then check
the results I'm not seeing the javaclasspath value changing.

The Hello program is just this:

public class Hello {
/**
* Return "Hello!".
* @return The string "Hello!"
*/
public static String sayHello() {
return "Hello!";
}
}

I've been trying all this at the editor commend line without a document open.

Any ideas?

..dan

    13 replies

    C
    ClayHelberg18-Opal
    18-Opal
    June 3, 2011
    Hi Dan--

    I'm not sure what's going wrong with your sample, but the Java console
    might be of some help. You can activate it in 5.4 by selecting
    Tools->Adminstrative Tools->Java Console. Then try running your static
    method, and in the Java Console you should see the stack trace for the
    exception thrown by the method. Hopefully that will give you some clues
    about exactly what it's looking for that it can't find.

    --Clay

    Clay Helberg
    Senior Consultant
    TerraXML
    P
    ptc-9533431-VisitorAuthor
    1-Visitor
    June 3, 2011
    I'm using 5.3 so used Tools -> Java Console.

    So that launched the Java Console, I then tried running at the Editor
    command line with the same eval java_static('Hello','sayHello')

    Nothing is output to the console window. Same with running without the eval.

    > Hi Dan--
    >
    > I'm not sure what's going wrong with your sample, but the Java console
    > might be of some help. You can activate it in 5.4 by selecting
    > Tools->Adminstrative Tools->Java Console. Then try running your static
    > method, and in the Java Console you should see the stack trace for the
    > exception thrown by the method. Hopefully that will give you some clues
    > about exactly what it's looking for that it can't find.
    >
    > --Clay
    >
    > Clay Helberg
    > Senior Consultant
    > TerraXML
    >
    P
    ptc-9533431-VisitorAuthor
    1-Visitor
    June 3, 2011
    I went to another machine that happens to have 5.4 but not the Inmedius
    stuff and it worked. I've got to look through classpath info, other than
    the different file location it looks like all the Arbortext stuff is in
    the 5.3/Inmedius configuration.

    ..dan


    > I'm using 5.3 so used Tools -> Java Console.
    >
    > So that launched the Java Console, I then tried running at the Editor
    > command line with the same eval java_static('Hello','sayHello')
    >
    > Nothing is output to the console window. Same with running without the
    > eval.
    >
    >> Hi Dan--
    >>
    >> I'm not sure what's going wrong with your sample, but the Java console
    >> might be of some help. You can activate it in 5.4 by selecting
    >> Tools->Adminstrative Tools->Java Console. Then try running your static
    >> method, and in the Java Console you should see the stack trace for the
    >> exception thrown by the method. Hopefully that will give you some clues
    >> about exactly what it's looking for that it can't find.
    >>
    >> --Clay
    >>
    >> Clay Helberg
    >> Senior Consultant
    >> TerraXML
    >>
    >
    C
    ClayHelberg18-Opal
    18-Opal
    June 3, 2011
    OK, sorry about that. Apparently if the class loader can't load the
    class it doesn't get to the point of generating a stack trace.

    Did you verify that your Java code is OK on its own, e.g. by writing
    another java class to invoke it and run it from the command line outside
    of Arbortext? If there's really a problem with the class itself, this
    should give you some more diagnostic information about the problem.

    If that checks out, it may be something to do with the settings on your
    Java compiler. If you're using 5.3, IIRC it comes with an oldish JVM
    which may not be compatible with your compiled byte code if you're using
    a more recent JDK. Try using the -target flag to compile your class to
    be compatible with a 1.4 JVM and see if that has any effect. (For full
    details about compiler flags, see
    B
    berard1-Visitor
    1-Visitor
    June 3, 2011
    Glad to hear this is now working for you. We do quite a bit of work with
    Java (and I'm actively updated our codebase to connect to new RESTful
    services), so it's in the forefront of my mind.

    If you decide to do any work with XUI, let me know. There's a bunch of
    sample code up on adepters.org, but one pretty handy snippet we use to
    instantiate java classes is to have a little javascript file (eg:
    loadXui.js) in your custom\init folder. For some reason, it only works if
    the command prompt is available (otherwise you get a java exception), but
    here's the syntax we use to load at startup:

    NOTE: This probably require Rhino Javascript to be default, since it tries
    to load Packages.*

    /**
    * This function loads the initial XUI.
    * ApplicationLoad event is used because first run will
    * not have a valid document (editinit) and scripts in
    * init are called before the window is fully available.
    */
    function handleEvent(e) {

    if (e.getType().equals("ApplicationLoad")) {
    Packages.com.mcg.arbortext.LogUtil.getInstance();
    Packages.com.mcg.arbortext.xui.XUIToolManager.loadXUI();
    }
    }
    var o = { handleEvent: handleEvent };
    var listener = Packages.org.w3c.dom.events.EventListener(o);
    Application.addEventListener("ApplicationLoad", listener, true);

    C
    ClayHelberg18-Opal
    18-Opal
    June 3, 2011
    OK, this makes me think it is likely to be a compiler target version
    issue. Try recompiling your class for a 1.4 target and see if that makes
    it work in the 5.3 environment.

    --Clay

    Clay Helberg
    Senior Consultant
    TerraXML

    B
    berard1-Visitor
    1-Visitor
    June 3, 2011
    I know we had some issues in the past setting Arbortext to use a different
    JVM

    You should be able to check it by typing:

    eval option(javavmpath)

    C
    ClayHelberg18-Opal
    18-Opal
    June 3, 2011
    That would be another potential solution, but it's probably safer to
    recompile the custom code for the standard Arbortext JVM.



    --C



    Clay Helberg

    Senior Consultant

    TerraXML


    P
    ptc-9533431-VisitorAuthor
    1-Visitor
    June 3, 2011
    Ok, this is something new

    So I'm compiling with javac 1.6.0_25

    I used this command

    javac -target 1.4 -classpath "C:\Program
    Files\Arbortext\Editor53\lib\classes\aom.jar" *.java

    and got

    javac: target release 1.4 conflicts with default source release 1.5

    compiling with target 1.5 worked ok.

    I was able to then execute the class within Arbortext.

    Chalk it up to yet another useful error message!

    thanks for the help
    ..dan



    > OK, this makes me think it is likely to be a compiler target version
    > issue. Try recompiling your class for a 1.4 target and see if that makes
    > it work in the 5.3 environment.
    >
    > --Clay
    >
    > Clay Helberg
    > Senior Consultant
    > TerraXML
    >
    >
    P
    ptc-9533431-VisitorAuthor
    1-Visitor
    June 3, 2011
    Thanks Clay and Keith for the ideas. I just love readme files that are not
    detailed enough and the documentation doesn't help with troubleshooting
    issues like this. Only mention in the readme was

    Make sure you have JDK 1.4.2 or later on your machine.

    looking for the error message in help center turned nothing up.

    ..dan

    > That would be another potential solution, but it's probably safer to
    > recompile the custom code for the standard Arbortext JVM.
    >
    >
    >
    > --C
    >
    >
    >
    > Clay Helberg
    >
    > Senior Consultant
    >
    > TerraXML
    >
    >
    >
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