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From Andi Vajda <va...@apache.org>
Subject Re: calling Python from Java fails...
Date Sat, 02 Jul 2011 19:15:43 GMT

On Fri, 1 Jul 2011, Bill Janssen wrote:

> Andi Vajda <vajda@apache.org> wrote:
>
>>> By the way, you might want to add a paragraph in that section about
>>> adding the ["-framework", "Python"] flags for building JCC on OS X.  I
>>> tripped over that again.
>>
>> If you send a paragraph to this effect, I'll integrate it into the docs.
>
> Here's a patch:

Thank you, Bill, for the patch. It's applied in rev 1142270.
I also updated the site content with your changes, it should be visible in a 
few hours.

Andi..

>
> /local/pylucene 31 % svn diff
> Index: site/src/documentation/content/xdocs/jcc/documentation/install.xml
> ===================================================================
> --- site/src/documentation/content/xdocs/jcc/documentation/install.xml	(revision 1141969)
> +++ site/src/documentation/content/xdocs/jcc/documentation/install.xml	(working copy)
> @@ -138,7 +138,7 @@
> 	  Is JCC built with shared mode support or not ?
> 	  <ul>
> 	    <li>
> -	      By default, on Mac OS X and Windows this is the case
> +	      By default, on Mac OS X and Windows this is the case.
> 	    </li>
> 	    <li>
> 	      By default, on Linux, this is the case.
> @@ -167,6 +167,12 @@
> 	and <code>LFLAGS</code> for <code>darwin</code> should be correct
> 	and ready to use.
>       </p>
> +      <p>
> +        However, if you intend to use the 'system' Python from a Java VM
> +        on Mac OS X -- Python embedded in Java --
> +        you will need to add the flags <code>"-framework" "Python"</code>
> +        to the <code>LFLAGS</code> value.
> +      </p>
>     </section>
>     <section id="linux">
>       <title>Notes for Linux</title>
> Index: site/src/documentation/content/xdocs/jcc/documentation/readme.xml
> ===================================================================
> --- site/src/documentation/content/xdocs/jcc/documentation/readme.xml	(revision 1141969)
> +++ site/src/documentation/content/xdocs/jcc/documentation/readme.xml	(working copy)
> @@ -763,9 +763,12 @@
>       </p>
>       <ul>
> 	<li>
> -	  JCC must be built in shared mode.
> -	  See <a href="site:jcc/documentation/install">installation
> -	    instructions</a> for more information about shared mode.
> +	  JCC must be built in shared mode.  See
> +          <a href="site:jcc/documentation/install">installation
> +	  instructions</a> for more information about shared mode.
> +	  Note that for this use on Mac OS X, JCC must also be built
> +	  with the link flags <code>"-framework" "Python"</code> in
> +	  the <code>LFLAGS</code> value.
> 	</li>
> 	<li>
> 	  As described in the previous section, define one or more Java
> @@ -790,14 +793,19 @@
> 	  via the <code>-Djava.library.path</code> command line parameter.
> 	</li>
> 	<li>
> -	  In the Java VM's main thread, initialize the Python VM by calling
> -	  its static <code>start()</code> method passing it a Python program
> -	  name string and optional start-up arguments in a string array that
> -	  will be made accessible in Python via <code>sys.argv</code>.
> -	  This method returns the singleton PythonVM instance to be used in
> -	  this Java VM. This instance may be retrieved at any later time via
> -	  the static <code>get()</code> method defined on the
> -          <code>org.apache.jcc.PythonVM</code> class.
> +	  In the Java VM's main thread, initialize the Python VM by
> +	  calling its static <code>start()</code> method passing it a
> +	  Python program name string and optional start-up arguments
> +	  in a string array that will be made accessible in Python via
> +	  <code>sys.argv</code>.  Note that the program name string is
> +	  purely informational, and is not used by the
> +	  <code>start()</code> code other than to initialize that
> +	  Python variable.  This method returns the singleton PythonVM
> +	  instance to be used in this Java VM. <code>start()</code>
> +	  may be called multiple times; it will always return the same
> +	  singleton instance.  This instance may also be retrieved at any
> +	  later time via the static <code>get()</code> method defined
> +	  on the <code>org.apache.jcc.PythonVM</code> class.
> 	</li>
> 	<li>
> 	  Any Java VM thread that is going to be calling into the Python VM
>

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