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jQuery JSON request code

This section of code invokes a abstract behavior ona page with a json request:

Code Block




 JSON request code
              //   make sure that callBackURL is a javascript variable set from  ajaxSaveBehaviour.getCallbackUrl().toString();
              // 
              console.log(" call back url :"\+ callBackURL);
               $.ajax({
                    url: callBackURL,
                   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $.ajax({
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; url: callBackURL,
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; type: 'post',
                    cache: false,

                   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; cache: false,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; data:JSON.stringify(ccbArry), // ccbArry is my json array 
                   
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; contentType: 'application/json; charset=utf-8',
                    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dataType: 'json',
                    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; success: function(json) {
                        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; console.log(" reponse :"\+ json);

                    },
                    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; },
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; error: function (XMLHttpRequest, textStatus, errorThrown) {
                           &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; console.log("error :"+XMLHttpRequest.responseText);
                    }
                    

                });



// the follwoing code handles ajax json request from jQuery

  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; });

This section of code is an abstract ajax behavior which accepts a json document in request and responds with another json document that is then available to the javascript method on the page.

Code Block



        AbstractAjaxBehavior ajaxSaveBehaviour = new AbstractAjaxBehavior(){
                       private static final long serialVersionUID = 1L;

                        @SuppressWarnings("unchecked")
                       public void onRequest()
            {
                           {
                //get parameters
                                final RequestCycle requestCycle = RequestCycle.get();


                               WebRequest wr=(WebRequest)requestCycle.getRequest();

                                HttpServletRequest hsr= wr.getHttpServletRequest() ;

                               try {
                                        BufferedReader br = hsr.getReader();
                
                           String                 
                           String  jsonString = br.readLine();
                                                     if((jsonString==null) || jsonString.isEmpty()){
                                                             logger.error(" no json found");
                           }
                                                     }
                           else {
                                                             logger.info(" json json  is :"+ jsonString);
                           }
                            

                
                                           }
                            

                
                } catch (IOException ex) {
                                        logger.error(ex);
                               }


                                // json string to retir to the jQuery onSuccess function
                               String data=getReturnJSONValue();

                                logger.info("returning json :"+ data);
                               IRequestTarget t = new StringRequestTarget("application/json", "UTF-8", data);
                                getRequestCycle().setRequestTarget(t);


                               //requestCycle.setRequestTarget(new StringRequestTarget("application/json", "utf-8", data));
                        }


                };
               add(ajaxSaveBehaviour);
       
        // make sure that  you pass this url as a javascript variable to the page that will make the ajax json request
              
        String callBackURL= ajaxSaveBehaviour.getCallbackUrl().toString();
        logger.info(" callback url :"+ callBackURL);

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