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From Sylvain Wallez <sylvain.wal...@anyware-tech.com>
Subject Re: Fwd: "Preserving" Rhino State
Date Tue, 05 Mar 2002 11:08:51 GMT
Jason Foster wrote:

> I sent a message to the Mozilla JavaScript newsgroup and got the 
> following reply...
>
>> It's not currently possible to serialize the execution state of the 
>> Rhino interpreter, if that's what you're requesting. However there 
>> has been some work on this by Christopher Oliver, see
>>
>> http://groups.google.com/groups?q=group:netscape.public.mozilla.jseng+author: 
>>
>> Christopher+author:Oliver&hl=en&selm=3BB3A10D.D7B1DE48%40mminternet.com&rnum=

>>
>> 4
>>
>> Rhino 1.5R3 introduced serialization for the first time, but I was 
>> hesitant to add the ability to serialize execution state. Perhaps it 
>> is worth considering for 1.5R4.
>
>
> If you take a look at the URL, you get the following nice tidbit...
>
>> >function foo(level) {
>> >    var now = new java.util.Date();
>> >    if(level > 5) {
>> >         print("run the file foo.jss");
>> >         capture("foo.jss");
>> >    } else {
>> >         print("next level");
>> >         foo(level + 1);
>> >    } print("restarted("+level+"): " + now)
>> >}
>> >
>> >foo(1);
>> >
>> >//c/rhinoSer/rhino1_5R3pre> date
>> >Thu Sep 27 09:44:30  2001
>> >//c/rhinoSer/rhino1_5R3pre> java -cp jss.jar 
>> org.mozilla.javascript.tools.shell.Main -opt -1 foo.js
>> >next level
>> >next level
>> >next level
>> >next level
>> >next level
>> >run the file foo.jss
>> >//c/rhinoSer/rhino1_5R3pre> date
>> >Thu Sep 27 09:44:37  2001
>> >//c/rhinoSer/rhino1_5R3pre> java -cp jss.jar
>> >org.mozilla.javascript.tools.shell.Main -opt -1 foo.jss
>> >restarted(6): Thu Sep 27 09:44:33 PDT 2001
>> >restarted(5): Thu Sep 27 09:44:33 PDT 2001
>> >restarted(4): Thu Sep 27 09:44:33 PDT 2001
>> >restarted(3): Thu Sep 27 09:44:33 PDT 2001
>> >restarted(2): Thu Sep 27 09:44:33 PDT 2001
>> >restarted(1): Thu Sep 27 09:44:33 PDT 2001
>
>
> Maybe I'm just feeling optimistic, but this looks almost exactly like 
> what would be needed for Cocoon.  Granted that this code is 
> experimental, but if the nice man from Mozilla is willing to 
> incorporate it into Rhino 1.5, then we'll be set.
>
> Comments?
>
> Jason Foster

That would be really great, as it would avoid writing a new language 
(even if Ovidiu already did a lot of work) and avoid introducing 
yet-another-language, which would be more difficult to promote than the 
well-known JavaScript.

Sylvain

-- 
Sylvain Wallez
  Anyware Technologies                  Apache Cocoon
  http://www.anyware-tech.com           mailto:sylvain@apache.org




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