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From tian galaxy <harmonymail...@gmail.com>
Subject Re: Question about the boot and classloading
Date Mon, 18 May 2009 13:10:42 GMT
OK ,thanks .Seems the minimal class set has been defined by the osgi.
I will look more closely on this problems and let you know if there some
progresses made.
Thanks  a  lot !

2009/5/18 Pavel Pervov <pmcfirst@gmail.com>

> I do not know osgi model in detail, but what minimal set of classes is
> needed to start osgi model itself? Then we could delegate to "system"
> bundle loader from bootstrap classloader.
>
> 2009/5/18, tian galaxy <harmonymail.ty@gmail.com>:
> > Yes , implement osgi loading model in there is too complex.
> >
> > We know some modules are more important than others , performing some
> > fundamental , basic functions .
> > Is it possible to only load these more" basic " modules with bootstrap
> class
> > loader and make the other modules work the osgi bundle?
> > Actually I don't quite understand why system classes could only be loaded
> by
> > bootstrap class loader?I noticed that there are some safety concerns
> > ,is there any reasons other than that?
> > Thanks !
> >
> >
> > 2009/5/18 Pavel Pervov <pmcfirst@gmail.com>
> >
> >> Short answer is "no". You'll have to implement osgi loading model
> >> inside bootstrap classloader. Is it too complex?
> >>
> >> 2009/5/18, tian galaxy <harmonymail.ty@gmail.com>:
> >> > Hi Pavel.
> >> >
> >> > Thanks.
> >> > Yes ,that's right .My question is whether there is a way to load the
> >> system
> >> > class by class loader other than the  bootstrap class loader ?
> >> > If we could load the system class by different loaders other than the
> >> > bootstrap class loader then there is a chance to make the harmony
> >> > runtime
> >> to
> >> > be osgi-ed.
> >> > I trying to work on this problem . Do you have any suggestions ?
> >> >
> >> >
> >> > 2009/5/18 Pavel Pervov <pmcfirst@gmail.com>
> >> >
> >> >> Tian,
> >> >> System classes are all loaded with bootstrap classloader. It is
> >> >> written in C++ and is located in
> >> >> working_vm/vm/vmcore/src/class_support/classloader.cpp
> >> >>
> >> >> 2009/5/17, tian galaxy <harmonymail.ty@gmail.com>:
> >> >> > Hi all
> >> >> > I have a question about the classloading in the drlvm.
> >> >> >
> >> >> > I know that there are kernel library inside the drlvm such as
> >> >> > java.lang.classloader, which enclose the the systemclassloader.
And
> >> this
> >> >> > class is loaded and used in the process of creating VM .
> >> >> > While the systemclassloader is a subtype of urlclassloader which
is
> >> >> > in
> >> >> the
> >> >> > "luni" module.So does the JNI_CreateJavaVM
> >> >> > also load the urlclassloader in the boot procedure of vm ?(I failed
> >> >> > to
> >> >> > search related code in the source code of drlvm).
> >> >> > If so , when ?Before or after the jni available ?
> >> >> > Since I am trying to implement the osgi on harmony and the osgi
> works
> >> >> with
> >> >> > bundles (modules) , I think I need to know the procedure of booting
> >> and
> >> >> > loading of class from different modules at the start up time.
> >> >> > Any clue about this ?Thanks
> >> >> >
> >> >> > plus,do we have the source code of java.exe ?Where?
> >> >> >
> >> >> > --
> >> >> > Regards
> >> >> > Michael Tian
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Regards
> >> > Michael Tian
> >> >
> >>
> >
> >
> >
> > --
> > Regards
> > Michael Tian
> >
>



-- 
Regards
Michael Tian

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