Hi, Cidylle,
I wrote one example based on speed tracer 's web worker and
after some sort of struggling
make it run.
If you like , I can send the source code to you. It seems no
place to attach file here?
Regards.
OrNot
BTW: I also need your help if possible. I want to pass a canvas'
image array from front thread to worker,
in javascript, it seems easy by the event.data. But I don't know how
to pass it in Speed Tracer 's implementation.
If I understand right, it only passes string and double.
On Aug 3, 8:56 am, cidylle0 <[email protected]> wrote:
> Chris,
> Thanks again for your pointers, they have been very helpful. Following
> your advice I believe I managed to set up the proper configuration and
> I feel I am very close to succeeding. So far I am simply trying to
> test the set up by sending a message from the main module to the
> worker, and have the worker send back the message then display it in
> an alert window. As I attempt to do so with postMessage() methods I
> run into an error I cannot seem to correct:
>
> ("worker bootstrap error" : "alert not defined" )
>
> Do you have any idea what that error could be ? I have the error
> whether i use simple strings or JSON objects in postMessage. I have
> ran a couple searches and looked into the wc3 specs but to no avail.
> Thank you.
>
> On Aug 2, 10:18 am, Chris Conroy <[email protected]> wrote:
>
>
>
>
>
>
>
> > Within SpeedTracer take a look at the Breaky Worker infrastructure (used to
> > validate the schema of records SpeedTracer receives from Chrome):
>
> > client/ui/src/com/google/speedtracer/...
> > breaky/BreakyWorker.gwt.xml
> > breaky/worker/BreakyWorker.java
> > client/model/BreakyWorkerHost.java
>
> > To get an idea of how all this stuff is wired up. The Worker Host lives in
> > the normal GWT module side of things, and the BreakyWorker is a
> > DedicatedWorkerEntryPoint responsible for initializing the worker. Since
> > it's small, it also handles the handling of messages.
>
> > The BreakyWorker.gwt.xml module pulls in our WebWorker definition and uses
> > the DedicatedWorkerLinker.
>
> > On Mon, Aug 1, 2011 at 7:58 PM, cidylle0 <[email protected]> wrote:
> > > Thank you for your input Chris.
> > > Yes I have been looking at the code included in Speedtracer but
> > > without documentation (and the fact that I am a novice GWT developer)
> > > I am having a difficult time figuring out how to the webworker is
> > > being set up and used in Speedtracer. There seems to be a module for
> > > the webworker with various classes representing worker entry points
> > > but I am not sure which would to implement and in what context. In the
> > > xml files of the modules i did notice an <add-linker ...> tag which I
> > > am assuming points to the module that represents the worker. Again, if
> > > anyone could provide a few basic steps to make a simple web worker
> > > work in GWT I would greatly appreciate.
>
> > > On a general note, I am a bit surprised by the lack of support
> > > available for web workers in gwt, when there is support for other
> > > HTML5 features like local storage, canvas etc. Does anyone know why it
> > > is the case ? Are people not interested in using multi-threading in
> > > GWT or is GWT not a suitable tool for such an application ?
>
> > > On Aug 1, 3:54 pm, Chris Conroy <[email protected]> wrote:
> > > > You definitely don't want to use gears.
>
> > > > You can take a look at how SpeedTracer uses WebWorkers via a custom
> > > > DedicatedWebWorker linker:
> > >http://code.google.com/p/speedtracer/source/browse/#svn%2Ftrunk%2Fsrc...
>
> > > > Note that you cannot reference $doc or $wnd in the webworker.
>
> > > > On Mon, Aug 1, 2011 at 6:37 PM, cidylle0 <[email protected]> wrote:
> > > > > Hi Allahbaksh.
>
> > > > > I did run accross the gwt-ns you mentioned but I am having trouble
> > > > > running the sample described. Can't seem to set it up right. The
> > > > > documentation is very minimal and the project seems to have been
> > > > > halted. Can anyone who has used web workers with GWT before help me
> > > > > out or point me out to some JAR or tutorial out there ? I found
> > > > > something called google Gears that seemed to have been doing something
> > > > > very similar (worker pool) but it has recently been deprecated. Any
> > > > > help would be appreciated. Thanks.
>
> > > > > On Aug 1, 5:02 am, Allahbaksh <[email protected]> wrote:
> > > > > > HI,
> > > > > > Check gwt-ns project. I have personally not used it.
> > > > > > Regards,
> > > > > > Allahbaksh
>
> > > > > > On Jul 30, 6:08 am, cidylle0 <[email protected]> wrote:
>
> > > > > > > Hello,
>
> > > > > > > I am currently playing around with GWT and I would like to
> > > implement
> > > > > > > some HTML5 features with it like web workers. In the GWT
> > > documentation
> > > > > > > I see that it supports a couple HTML5 features but no Web Workers.
> > > Are
> > > > > > > there any libraries out there that would implement web workers in
> > > > > > > GWT ? Or can anybody point me to a simple tutorial ? I would
> > > > > > > appreciate. Thanks.
>
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