Ornot, So I have used your sample code and tried to run the development mode and send a simple echo message to the worker. When I run in Firefox, I see the button being present but when I click on it nothing happens. When I run in chrome, I see nothing blank page. So I did a GWT compile, then open the html file in the war folder with firefox and it worked. For chrome I had to deploy the war file to my apache server and it worked. Is that normal behavior ? The webworkers do not work during development or debugging mode, only after we do a gwt compile ?
As for your workaround I think it should be working fine because you are working with JSNI, thus working directly with javascript, gwt shouldnt complain about it. On Aug 7, 3:59 am, OrNOt <[email protected]> wrote: > I get a workaround but no idea if it makes right sense. > > Create a JSNI factory method to by pass the GWT like this > > private final native short[] createShortArray(int length) > /*-{ > var dataArray= new Array(length); > return dataArray; > }-*/; > > Now in your GWT code, you can use it as below: > > short[] myShortArray=createShortArray(100); > > Now if you passMessage(myShortArray), it works. > > In your worker side , you need a method like this: > > public final native short[] getDataAsShortArray() > /*-{ > return this.data; > > }-*/; > > Anybody can kindly confirm it ? > > Thanks a lot. > > OrNot > > On Aug 7, 7:52 am, OrNOt <[email protected]> wrote: > > > > > > > > > Hi, Christian, > > Yes,I have tried to modify the code to pass array. But it seems > > impossible. The reason is not from speed tracer part but from GWT > > internal implementation If I understand well. When you create a array > > in GWT like this : > > > short[] dataArray = new short[100]; > > > The GWT will translate it to a none native javascript array like > > this: > > > this.m_shortArray = initDim(_3S_classLit, {22:1}, -1, 4, 1); > > > Once you want to pass your dataArray, an exception will be thrown > > because > > > of clone error. > > > It seemsWebworkeronly supports native array clone. I have tried > > chrome and > > firefox and getting the same error. > > > I don't know how to go further now. ;-( . Convert the array to > > string might be a > > solution but the performance will be bad for big array. > > > OrNot > > > On Aug 6, 2:01 am, cidylle0 <[email protected]> wrote: > > > > Hi OrNot, > > > > Yes please if you could help out and let me take a look at your > > > project that would be great ([email protected]). Thanks a lot. > > > As for passing a canvas image array it should be possible since it can > > > be done in JavaScript. The postMessage method in the SpeedTracer code > > > indeed does only have String and Double. Maybe you could modify the > > > speedtracer MessageHandler class and add a method for array passing. > > > Or would stringifying the canvas array be possible ? > > > > On Aug 4, 6:08 pm, OrNOt <[email protected]> wrote: > > > > > Hi, Cidylle, > > > > I wrote one example based on speed tracer 'swebworkerand > > > > 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 toworker, > > > > 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 theworkersend 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: > > > > > > ("workerbootstrap 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 BreakyWorkerinfrastructure > > > > > > (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. TheWorkerHost > > > > > > lives in > > > > > > the normal GWT module side of things, and the BreakyWorker is a > > > > > > DedicatedWorkerEntryPoint responsible for initializing theworker. > > > > > > 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 representingworkerentry 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 theworker. > > > > > > > Again, if > > > > > > > anyone could provide a few basic steps to make a simplewebworker > > > > > > > work in GWT I would greatly appreciate. > > > > > > > > On a general note, I am a bit surprised by the lack of support > > > > > > > available forwebworkers 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 usedwebworkers 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 (workerpool) 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 likewebworkers. In the GWT > > > > > > > documentation > > > > > > > > > > > I see that it supports a couple HTML5 features but > > > > > > > > > > > noWebWorkers. > > > > > > > Are > > > > > > > > > > > there any libraries out there that would > > > > > > > > > > > implementwebworkers in > > > > > > > > > > > GWT ? Or can anybody point me to a simple tutorial ? I > > > > > > > > > > > would > > > > > > > > > > > appreciate. Thanks. > > > > > > > > > > -- > > > > > > > > > You received this message because you are subscribed to the > > > > > > > > > Google > > > > > > > Groups > > > > > > > > > "GoogleWebToolkit" group. > > > > > > > > > To post to this group, send email to > > > > > > > [email protected]. > > > > > > > > > To unsubscribe from this group, send email to > > > > > > > > > [email protected]. > > > > > > > > > For more options, visit this group at > > > > > > > > >http://groups.google.com/group/google-web-toolkit?hl=en. > > > > > > > > -- > > > > > > > You received this message because you are subscribed to the > > > > > > > Google Groups > > > > > > > "GoogleWebToolkit" group. > > > > > > > To post to this group, send email to > > > > > > > [email protected]. > > > > > > > To unsubscribe from this group, send email to > > > > > > > [email protected]. > > > > > > > For more options, visit this group at > > > > > > >http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
