JNLP/Web Start Question

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Steve A - 22 Dec 2006 21:01 GMT

I'm on a project that has a GUI written in Swing and which is
downloaded and launched via Web Start. The user uses the web-based
application to navigate and find data and the Swing application is used
to view the data when the user clicks on the particular link. The JNLP
file is generated at request time so that it has request-specific
parameters. We are trying to avoid opening multiple Swing application
instances each time the user clicks a link. Also, we cannot run the
browser embedded in the Swing application, the browser has to be
running separately.

Is it possible for the user to click the JNLP link again and instead of
launching a new instance of the Swing application have the same
instance load some different data?

Any ideas or help is greatly appreciated,

-Steve A.

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Thomas Hawtin - 23 Dec 2006 14:12 GMT

> Is it possible for the user to click the JNLP link again and instead of
> launching a new instance of the Swing application have the same
> instance load some different data?

There is a single instance service (from 1.5, IIRC).

Tom Hawtin

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Steve A - 29 Dec 2006 00:35 GMT

Thank you, Tom.

I looked into the javax.jnlp.SingleInstanceService and from the
documentation it looks like exactly what I need. Unfortunately I can't
get a sample to work and the documentation is sparse. Can anyone who
has used this service provide guidelines or sample code?

Thank you,
Steve A.

> > Is it possible for the user to click the JNLP link again and instead of
> > launching a new instance of the Swing application have the same
[quoted text clipped - 3 lines]
>
> Tom Hawtin

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Lukas Zapletal - 07 Jan 2007 15:51 GMT

Hello Steve,

did you get it working? Its not working for me too...

LZ

Steve A napsal:

> Thank you, Tom.
>
[quoted text clipped - 13 lines]
> >
> > Tom Hawtin

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Lukas Zapletal - 07 Jan 2007 16:09 GMT

Maybe this will help:

http://lukas.zapletalovi.com/blog:jnlp_singleinstanceservice_not_working

> Thank you, Tom.
>
[quoted text clipped - 13 lines]
>
> > Tom Hawtin

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Andrew Thompson - 08 Jan 2007 03:37 GMT

Please refrain from top-posting.

> I looked into the javax.jnlp.SingleInstanceService and from the
> documentation it looks like exactly what I need. Unfortunately I can't
> get a sample to work and the documentation is sparse. Can anyone who
> has used this service provide guidelines or sample code?

Example:
1) Launch file - sandboxed
<http://www.physci.org/jws/singleapp.jnlp>
2) Source (with source/JNLP/ant build file) - tiny
<http://www.physci.org/jws/singleapp.zip>

HTH

Andrew T.

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JNLP/Web Start Question

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