Re: [Opengrads-devel] code for GradsVM

[Arlindo da S. <da...@al...>]

On Mon, Nov 16, 2009 at 3:39 AM, pedro tsai <ped...@ya...> wrote:

> hi Arlindo,
>
> It is good hear from you.  It is no problem, I really want to get this
> thing running properly and get some feedbacks.
>
> (a).  Yes, we can add the '-l'  option.
>
> (b).  Ideally, we want output of server command that is relevant to the
> user to go back to the client window, and we also need to print out any
> error message on the server console side for debugging purpose. I think
> hijack gaprnt() will provide finer control on what information to send to
> client and what to print out to terminal on the server side.  Where as
> re-direct stdout would lacks this finer control.  I don't know which way is
> easier, but I think gaprnt() solution might be more viable in the long run.
>
>
I'll add the hooks for gaprnt(). The "C code" will call a gaprnt() function
on the java side; I'll let you handle the message passing from that point
on. OK?


> (c)  I need to investigate the Java client side capture of graphics display
> to see how it is done. But we can also send printim output file to the
> client via socket connection (this is not hard to do), and then user can use
> what ever mechanism available on the device to print the image file.  For
> now, perhaps it is easier to send the printim file to client, and later we
> can consider client side graphics capture.
>
>
Sending the file to client is more than adequate.


> (d)  If client is running inside a browser, then we do need some kind of
> Console class
> that can embedded inside a browser.   I think this would be a nice
> feature.  Would like to do some search on google to see if may be some one
> has already implement such class with Jline support (or other similar
> command completion).
>
> I will update with your modification, and we go from there.
>
>
Thank you for the quick response.

   Arlindo


talk to you later,
>
> Pedro
>
> --- On *Sun, 11/15/09, Arlindo da Silva <da...@al...>* wrote:
>
>
> From: Arlindo da Silva <da...@al...>
> Subject: Re: code for GradsVM
> To: "pedro tsai" <ped...@ya...>
> Cc: ope...@li...
> Date: Sunday, November 15, 2009, 4:49 PM
>
>
> Hi Pedro,
>
>   Sorry for the very long time, but I finally am able to get back to
> GrADSVM. I have now integrated the java code under the opengrads codebase,
> and updated the grads.class (built through nestedvm) to the latest grads
> 2.0.a7.
>
>  I tried your your client/server code and it works as advertised. Very nice
> work, indeed. I have made some small alterations:
>
> 1) I preserved the previous monolithic JGrads.class. Therefore, I renamed
> the client class GVMclient.
>
> 2) I fixed a small bug in gxJ.java related to color definition.
>
> 3) I moved all non-nestedvm code to a separate Java/ directory.
>
> 4) Added targets to the Makefile to create grads.jar; renamed Makefile ->
> GNUmakefile to make it clear that GNU make is required.
>
> Here are the remaining issues:
>
> a) Would it be possible to add an option to "conn" to pass to the server,
> e.g.,
>
>   ga-> conn -l
>
> If omitted, the client could ask the user if portrait is desired.
>
> b) We need to capture the server's stdout and ship it back to the client.
> As we talked before, we could hijack gaprnt() and buffer the output on the
> java side and ship it back to the client upon finishing a command. Or else,
> one might be able to intercept stdout. Which one do you think is easier to
> do. (I can have gaprnt() calling a java function much like the gxJ
> functions.)
>
> c) The command printim now creates an image file on the server side. We
> need to find a way to ship this file back to the client. Can this be done
> byte-by-byte through the sockets?  Another possibility would be to implement
> printim entirely in java as a screendump of the graphical canvas. (Are there
> built in methods for this?)
>
> d) Right now GrADSVM is a console application. Last year I was
> experimenting with a Console class, but it lacked jline support. Having a
> built in console one might be able to deploy the client through WebStart. Do
> you agree?
>
> BTW, you can find the revised jar (including sources) here:
>
>        http://opengrads.org/devel/java/
>
> or you can get the full sources from cvs:
>
>   % gacvs co -P grads
>
> See the Java/ directory. To build the nestedvm code you need a Mac, or else
> you need to build the nestedvm toolchain yourself for other platorms. The
> nestedvm compiled supplibs should be portable.
>
> GVMclient/server can be run from the jar, e.g.,
>
> % java -cp ./grads.jar GVMserver
> % java -cp ./grads.jar GVMclient
>
>   I think we are very close to have something for an early release to the
> community. What do you think?
>
>   Cheers!
>
>     Arlindo
>
>
> On Mon, Mar 2, 2009 at 2:47 AM, pedro tsai <ped...@ya...<http://mc/compose?to=...@ya...>
> > wrote:
>
>> hi Arlindo,
>>
>> Attached is GradsVM client/server code.  Un-tar the files into your
>> working
>> directory where the other NestVM generated code/data are located.  So far,
>>
>> I have not yet touch NestVM generated files, I just add new code in the
>> same top-level directory where original NestVM files are.
>>
>> 1.  To compile the code, type 'make'.  To list all the new files, type
>> 'make info'.
>>
>> 2.  To run,  you need 2 windows (one for client process, one for
>> GradsVM process)
>>
>>     on the client window,  type 'make run'
>>
>>     on the server window,  type 'make svc'
>>
>>     once the system running,  the first command to type on client's side
>>     readline input is
>>
>>         'conn'   /* by default, it will use IP 127.0.0.1, and port 6789
>>         and 6790.  If these ports are used on your system, you can change
>>         them (in SockIPC.java) and then re-compile.  I use 2 ports, one
>> for
>>         'gacmd' communication and one for 'graphics primitives'
>> communication.
>>
>>     If you want to run GradsVM on remote host, type
>>
>>     'conn  ip-addr'
>>
>>     Once the connection is establish, you should see output on the
>>     'server side' window.  You need to hit a 'Return' on the server
>>     side window, otherwish the gradsVM thread is blocking after the
>>     initial Grads information display ('Landscape mode ('n' ...)
>>
>>     Now you can enter 'grads' command, then they should be executed
>>     by GradsVM.
>>
>>     To exit the client, type 'quit', this will disconnect and kill
>>     the client process.  You can start a new client process again
>>     to connect to GradVM server.  I did not have 'disconnect' command
>>     implement, but it is not hard to do.
>>
>> 3.  The naming convention for the files is:  the server side code starts
>> with
>> 'GVM...'.  The client side code starts with 'JG...'.  Files that do not
>> have either prefixs are utility code or are used by both (like
>> SockIPC.java)
>>
>> 4.  You can have more than 1 client connect to the server, each client
>> will get its own GradsVM, but right now there is bug, so I think it will
>> dead-lock the gradsVM.
>>
>> 5.  There are other issues, for example, the command line argument on
>> the client side is not pass to the GradsVM,  this is easy to fix.   And
>> also,
>> the information test from GradsVM is not sent back to client. (e.g, q
>> file, q dim....).
>>
>> If you can not run the prototype, let me know.
>> I think there is still a lots of work to refine this......
>>
>> Pedro
>>
>>
>>
>
>
>
> --
> Arlindo da Silva
> da...@al... <http://mc/compose?to=...@al...>
>
>
>


-- 
Arlindo da Silva
da...@al...