Re: How to pass a variable from Javascript code to Java

And how about storing the value to a session or a cookie from javascript
and reading from java server through an implemantation of observer
parttern? It would work in any case, in any framework.

Στις Τετ, 29 Αυγ 2018, 2:39 μ.μ. ο χρήστης marwa hussein <
[email protected]> έγραψε:

> Hi,
> Thank you all for guiding me to the solution especially "Numa" .. and this
> is how I solved it:
> for the .tml
> <p id="myId" data-mydata="testvalue"/>
>
> and in the JS JQuery file, I passed the variable in a JSON object --> data:
> {myData:dataToSend}
> $('#myId').click(function() {
> var dataToSend=  $('#myId').data('mydata');
> ajax('answer', {
> element: $('#myId'),
> data:{ myData:dataToSend},
> success: function(response) {
> }
> });
> });
>
> and in java file, I used @RequestParameter("myData") to get the value from
> the JSON object:
>  @OnEvent("answer")
>  @PublishEvent
> public void answer(@RequestParameter("myData") String varName)
>     {
>     System.out.println("Variable name is :"+  varName  );
>     }
>
> Regards,
> Marwa
>
>
> On Tue, Aug 28, 2018 at 3:20 PM Numa Schmeder <[email protected]> wrote:
>
> > Hello Marwa,
> >
> > The answer provided by Thiago is much simpler.
> > Just put your data in a data attribute of a tag and then use the tutorial
> > ajax and zones to send this data to a server side event handler.
> > If you want to do it automatically without triggering a javascript event,
> > just put you script in an on document ready event, to make sure your
> > javascript code is called once the page is rendered and loaded by the
> > browser.
> >
> >
> > ===> in html page
> >
> > <div id=“myId” data-mydata=“mydata"></div>
> >
> > ===> javascript at the end of html page
> >
> > $(function() {
> >         var dataToSend = $(‘#myId’).data(‘mydata’);
> >         ajax(‘pageData', {
> >                         data: dataToSend, // This doesn't need to be the
> > same element as the one two lines above
> >             // Callback called when the request is finished.
> >             // response.json is the object returned by the event handler
> > method
> >                         success: function(response) {
> >                                 alert('sent to server');
> >                         }
> >                 });
> > });
> >
> >
> > =====> in java page
> >
> > JSONObject onPageData()
> >     {
> >         return new JSONObject("origin", "componentAction");
> >     }
> >
> >
> > You can use jquery or something else.
> >
> > Best
> > Numa
> >
> >
> >
> >   <http://www.dfacto.ch/>       Numa Schmeder    www.dfacto.ch  <
> > http://www.dfacto.ch/>
> > [email protected] <mailto:[email protected]>   |   M +41 79 538 30 01
> >
> > DIGITAL STRATEGY   |   DESIGN   |   DEVELOPMENT
> >
> >
> >
> >
> > > Le 28 août 2018 à 12:22, marwa hussein <[email protected]> a
> > écrit :
> > >
> > > Hello,
> > >
> > > Thanks all for your suggestions. I followed the example shown in
> > > https://tapestry.apache.org/ajax-and-zones.html in "Invoking
> server-side
> > > event handler methods from JavaScript"   but here the event is in the
> > java
> > > code "server-side" and is invoked from the Javascript code "onClick()"
> ,
> > > but what I want is the opposite direction, sending a "string variable"
> > from
> > > a tag appended in  the clientside javascript code to the java code "in
> > the
> > > serverside".
> > > For now, I will test to use hidden input (although I didn't want to
> use a
> > > form submit) and I will see if I can make it or not ...
> > >
> > > Thank you all for your help and valuable suggestions, and of course, if
> > > anyone face the same problem before and could give me hints to how to
> do
> > it
> > > please tell me.
> > > Regards,
> > > Marwa
> >
> >
>
> --
>
>
>
> *Marwa Hussein M. TA @ Information Systems Department Faculty of Computers
> & Information Assuit University*
> <[email protected]>
>