Jnlp file parameter element problem

Hello all,
I have a jar file which contains all the class files and an configuration file of type(.cfg).
For my application to run properly i need to pass this .cfg file as an argument to the main method in one of the file in the jar...
i did pass the name of the file as one of the parameter element,but my application is not initialized and not working.but the jar files have been deployed in the local machine.
so my question is , is there a way so that i can pass my file as a parameter to the main method through jnlp xml file.

thanks andrew,
but my problem is that i need to pass the path of my file along with the name of the file to the main method ...and in turn my main method will do all the required processing work..
the jar file that is to be deployed contains the class files and the .cfg file..
my jnlp files looks as follows:-
<jnlp spec="1.0+" codebase="$$codebase" href="voicechat.jnlp">
<information>
<title>SIP Based Voice Chat</title>
<vendor>First Internet Systems Pvt Ltd</vendor>
<description>Voice Chat</description>
<description kind="short">Voice Chat </description>
<icon href="images/demologo.gif"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.5" href="http://java.sun.com/products/autodl/j2se"/>
<jar href="sip.jar"/>
<jar href="ua.jar"/>
</resources>
<application-desc main-class="local.ua.GraphicalUA">
<argument>-f</argument>
<argument>a.cfg</argument>
</application-desc>
</jnlp>
the second argument that i had passed is the name of the file in the jar to be passed..
but as a result when i invoke this file, the jar files are deployed but application is not starting as expected..for it to work the file and its path has to be passed to the main method..
which is what i tried through argument element...but it does not seem to work..
so all that i need to know is that, is it possible to pass a file and its path as an argument in the jnlp file..

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>
...but it is giving me an error that codebase or something like this. ...>Try changing the JNLP file to 'something like that', that might work.
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Edited by: TomC125468 on Aug 19, 2009 1:35 PM

Hi Luca-Sanna,
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Indicated instalation path of the aplication in JNLP file

Hi everybody,
First of all, i would like to apologize about my english. Sorry about it.
I got a problem with a deploymet of an application using Java Web Start.
My application deploys correctly but i need a way to indicate where's the path i want to download the app.
I've been read all documentacion about it but the argument productpath of the JNLP file doesn't works.
I try a lot of differents ways in JNLP file, like:
<application-desc main-class="MyPrincipalClass">
<argument>-java</argument>
<argument>-productpath</argument>
<argument>DownloadedPath</argument>
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just the plug-in - once)
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About multiple JARs in jnlp file

If the application has number of jar files, then how to accomodate those in <resources> element of jnlp file?
I have tried by putting those jars in a single folder and giving the complete path of *.jar files but its not working.
Can anyone please suggest some solution?

If the application has number of jar files, then how
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file?The other poster gave a broad outline, for more details,
see section 4.3 "Specifying Code Resources" of the
JNLP Specification*.
* The JNLP Spec. is donwloadable, but is not
available for on-line browsing.
http://java.sun.com/products/javawebstart/download-spec.html
I have tried by putting those jars in a single folder** Where?
and giving the complete path ...It is best to specify a path relative to, and 'below'
the codebase.
...of *.jar files but its not working. That is not very specific. What is 'not working'?
Perhaps the code is just lazy - in need of a bit
of a rest and a holiday?
Most other problems show errors in the Java
Console. The Java Console can be configured
to automatically open when launching a JWS
app., and that is a good thing when an app. is
not launching correctly.
See the options in the Java Control Panel for
auto-popping the console.
Can anyone please suggest some solution?1) Configure the Java Console to open
automatically, and copy/paste any exceptions
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2) Check the JNLP file for well formedness***,
before posting it here.
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JNLP File Generated By A Servlet

Based on configuration issues with our system build, I have created a servlet that generates the JNLP file for an app we have created. Once the file is written and contains all the dynamically generated info, it is never written by the servlet again.
I noticed in creating the servlet, initially, that I actually HAD to write the JNLP file. Returning the JNLP file and setting the mime type in the HTTP response was not enough. When Web Start is invoked by the browser, it goes back to the stored JNLP file on the server.
Can anyone explain why this is necessary?? Its seems redundant. If I can create the JNLP dynamically and pass it back to the browser, why must Web Start retrieve the JNLP file AGAIN from the web server after it launches??
John Turner
Software Engineer
Context Media, Inc
[email protected]

There is a limit to what you can do with dynamically generated JNLP files. The combination of codebase and href must exactly specify the JNLP resource that you are retrieving. If you're using a servlet with parameters in a query string to generate the file, it should look like this:
<jnlp spec="1.0+" codebase="http://app.datadevelopment.com/app" href="MyServlet?param1=value1&param2=value2">
As long as the MIME type returned by the servlet is "application/x-java-jnlp-file", JWS will start just fine. Unfortunately, JWS will then bomb badly because it tries to use the href attribute as part of the file name for saving the file, and Windows at least doesn't like question marks in a file name.
A workaround is to replace the query string with path values:
<jnlp spec="1.0+" codebase="http://app.datadevelopment.com/app" href="MyServlet/param1=value1/param2=value2">
I'm not 100% sure that this will work with the '=' sign as my application needed only one parameter so I dispensed with the paramN=valueN and replaced the directory with valueN only. The point is, though, that each and every time the application is launched JWS will go to the web server to get the latest copy of the JNLP and the only way I have found to dynamically generate the content is to append the necessary parameters as path names after the script (JSP in my case, servlet in your case).
If you have multiple parameters and the '=' sign is a problem, strip out the parameter name and require that the parameters be specified in the same order each time. Use one directory delimiter per parameter.
You can use request.getPathInfo() to retrieve the path after your servlet.

Jnlpdownloadservlet and dynamic jnlp file

Problem: we want the version handling (+ jardiff) of JnlpDownLoadServlet, but we also need to construct the jnlp file dynamically (for example: a .jsp file). It seems to me there are two solutions, neither of them good: a) hack the JnlpDownloadServlet (or roll our own), intercepting the jnlp-file-reading code to forward to the jsp page that generates the jnlp xml data and use the generated response as the file contents.
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Is there a third possibility? Or something in the pipe for the near future?
(Note: Web Start Services is not a solution for this task since WSS doesn't support jar versioning, and since the $$properties mechanism does not appear to be ideal for passing a lot of dynamic jnlp information.)
Thanks in advance for any advice.

My jsp page actually generates the list of jars for the application. It also passes some info specific to the user session by means of the jnlp file. Since we are doing games, the list of applications keeps growing. By generating the resource elements dynamically for a game, we can reduce maintenance (as opposed to having a large number of jnlp files with mostly duplicate code) -- especially when a version is updated.
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Jnlp file parameter element problem

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