Re: RobotChase, Java edition

From:
Andrew Thompson <andrewthommo@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 18 May 2008 20:24:40 -0700 (PDT)
Message-ID:
<02b0adb4-275d-4d9d-a871-c1d378bf6e3f@k10g2000prm.googlegroups.com>
On May 19, 3:50 am, "John B. Matthews" <nos...@nospam.com> wrote:

In article
<1e80e763-ce16-43db-a05e-bcd4ac525...@x19g2000prg.googlegroups.com>,
 Andrew Thompson <andrewtho...@gmail.com> wrote:

...

(Though I'd really prefer to try a *sandboxed* version of the
app. direct off the net.)


The program reads & writes to the user node for the package, using
java.util.prefs.Preferences. Wouldn't that violate the sandbox?


Yes. JWS offers the PersistenceService* as
an alternative - it is mostly useful for
sandboxed apps, since it would require some
conversion from standard use of Preferences.

I had a simple example of the PS, but my site
is offline at the moment.

* <http://java.sun.com/products/javawebstart/docs/javadoc/javax/jnlp/
PersistenceService.html>
"PersistenceService provides methods for
storing data locally on the client system,
even for applications that are running in
the untrusted execution environment. "

.. The jar
is signed, so at least you know it's only _me_ trying to get a
foothold:-)


In that case, the simpler route for you
as a developer would be to add the request for
'all-permissions' into the JNLP file.

OTOH - I would feel much *safer* running a
sandboxed app. - you need to understand that
..I don't know you from Adam, and do not know
if you are either trustworthy or competent.

Of course, I could always download the code,
have a look over it, build the project from
the source, and run that. But obviously that
will take me a lot more time and effort. It
would be nice to have a version that can be
run directly off the net - sandboxed, perhaps
with a startup message
 'No High Scores Stored!
  Use Trusted Version For Hi Scores'

Just a thought..

(And yes - I realise the point of all this is
more about the code than the game itself, but
having the game available can act as a nice
advertisement/enticement to continue with a
download and build)

--
Andrew T.
PhySci.org

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