The Scripturian environment is designed for multi-threadedness and does
the "right thing" in terms of Nashorn contexts/globals to ensure
separation. In concurrent environments, using locks can be useful. Might
not the best choice for high concurrency, but it sometimes it's
necessary, especially when working with 3rd party libraries.
It would be nice if "sync" were added to mozilla_compat. Isn't the whole
point of it to support legacy code?
On 10/11/2013 05:23 PM, Hannes Wallnoefer wrote:
Actually Rhino exposes a "sync" function for this purpose,
org.mozilla.javascript.Synchronizer is just the class implementing
this feature and not meant to be used directly by scripts.
While you could do something like this in Nashorn I would advise
against it. Thread-safety is not one of the primary design goals in
Nashorn, and nowadays most people would agree that there are better
and safer ways for working with threads. I suggest looking at
Worker/Actor models where you have multiple script engines working
together through message passing.
Hannes
Am 2013-10-11 10:45, schrieb Tal Liron:
Thanks!
Would it be possible to add this to mozilla_compat.js so that "new
org.mozilla.javascript.Synchronizer(myFunction)" would work?
On 10/11/2013 03:31 PM, A. Sundararajan wrote:
There is a 'sync' function in a demo application (jconsole script
plugin). This may be of use.
var sync = function(func, obj) {
if (arguments.length < 1 || arguments.length > 2 ) {
throw "sync(function [,object]) parameter count mismatch";
}
var syncobj = (arguments.length == 2 ? obj : this);
if (!syncobj._syncLock) {
syncobj._syncLock = new Lock();
}
return function() {
syncobj._syncLock.lock();
try {
func.apply(null, arguments);
} finally {
syncobj._syncLock.unlock();
}
};
};
See also:
https://blogs.oracle.com/nashorn/entry/nashorn_multi_threading_and_mt
-Sundar
On Thursday 10 October 2013 03:16 PM, Tal Liron wrote:
How does one create synchronized functions in Nashorn?
Rhino has this facility:
function myFunction() { ... }
myFunction = new org.mozilla.javascript.Synchronizer(myFunction)
