[jdom-interest] Re: [Jython-users] Scripting Pages in Java Web Applications
Mike.Grogan at Sun.COM
Mon Jun 16 17:52:48 PDT 2003
There is a misunderstanding of what the JSR proposes here. See the draft at
The goal of the JSR is to provide a consistent and standard mechanism for scripting languages to use to access functionality implemented in Java. As the JSR points out, the way that Java objects are represented and accessed from a particular scripting language has to be specific to that language. A mechanism that required a scripting language implemented in Java to access other Java objects using JNI wouldn't make sense. The JSR doesn't propose that.
The focus of the JSR is on web scripting. A major goal is to allow developers to bundle script pages in Java Web applications and provide a mechanism for those pages to access the standard Java web abstractions (request, response, context etc.) in a way that is consistent with the way they are accessed from Servlets and JSPs.
Python/Jython is definitely one of the scripting languages we hope will benefit from the JSR. We welcome your input.
----- Original Message -----
From: Frank Cohen <fcohen at pushtotest.com>
Date: Monday, June 16, 2003 1:27 pm
Subject: Re: [Jython-users] Scripting Pages in Java Web Applications
> Hi Guido: It's an honor to write to you. Python is an excellent
> of work. Thank you for Python.
> I am using Jython embedded in my TestMaker open-source project as
> utility and framework for building intelligent test agents to
> Web-enabled applications for scalability, performance and
> functionality. I am trying to convince developers, QA technicians
> IT managers that Python is their lingua-franca to build better
> software. Details are at http://www.pushtotest.com/ptt.
> In my opinion JSR 223 is not worthy of support. JSR 223 implements
> very un-Java like way to bridge Java objects to script language
> functions. 223 aims to provide a native interface to make calls
> from a
> Java object to a limited number of common scripting functions.
> there may be times when a native interface is useful, I would
> like to include a native interface in my production-ready code.
> asking for problems, including:
> 1) Weak exception handling. If my scripting language interpreter
> externally to the Java VM then how do I handle recovering from an
> exception in the interpreter?
> 2) Slower performance. Native interfaces take processing time and
> memory to make a call to an external function.
> 3) Fewer expert resources to help me code. Look at how few
> there are with production JNI experience.
> In my view, JSR 223 should be restarted. I believe Jython's use of
> byte codes is a much better design.
> Jython compiles Python scripts into Java byte codes. The Python
> in Jython is 100% Java and runs as native Java code through the
> Imagine if JSR 223 standardized the way script languages compiled
> scripts into Java byte-codes. You could have PHP, Python, Ruby,
> anything else... and they would all be 100% Java.
> Support for Java byte-codes is important in the middleware space,
> J2EE and .NET are battling it out for developer mindshare and
> Microsoft has done an excellent job at building its CLR virtual
> to support multiple object-oriented languages. The Java platform
> be so much better with multiple language support... all running on
> Java VM.
> -Frank Cohen
> TestMaker 4.0 now shipping
> On Thursday, June 12, 2003, at 06:59 AM, Guido van Rossum wrote:
> > A journalist reporting on JavaOne pointed me to the following Java
> > standardization effort:
> > http://www.jcp.org/en/jsr/detail?id=223
> > AFAICT (after reading the first two sentences) this is an
> attempt to
> > open up room for scripting languages in J2EE environments. Anyone
> > interested in pursueing this?
> > --Guido van Rossum (home page: http://www.python.org/~guido/)
> > -------------------------------------------------------
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> > _______________________________________________
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> > Jython-users at lists.sourceforge.net
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> Frank Cohen, Founder, PushToTest, http://www.PushToTest.com,
> phone: 408
> 374 7426
> Come to PushToTest for free open-source test automation solutions
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