无法在ajax调用中加载资源

Question

Consider this code:

  function drawCharts2() {
  var jsonData2 = $.ajax({
      url: "http://**.**.**.**:9001/jolokia/read/*",
      dataType:"json",
      async: false
      }).responseText;

     var parsed2 = JSON.parse(jsonData2);

The above URL contains no value at the startup of the web app. The data in that url will come after 2-3 minutes.

When I start my web app. It gives error, but as a workaround I have set my page refresh time to 30 seconds. So after 30 seconds the table generates successfully.

I need a way so that, even if the url will not contain any data, the code should not give any error. It should just skip the whole code. How can I achieve this?

Answer 1

Try this

    var parsed2;
        function drawCharts2() {
                $.ajax({
                    type: "GET",
                    url: "http://**.**.**.**:9001/jolokia/read/*",
                    contentType: "application/json; charset=utf-8",            
                    dataType: "json",
                    success: function (response) {
                     if(response) {
                       parsed2 = response;
                     } 
                    else
                         {   drawCharts2();  // retry if you want to..     }
                    },
                    error: function (event) {

                        alert("Transmission Failed. (An error has occurred)");
                    }
                });
      if( parsed2 != null)
      {
      var arr2 = []; for(var x in parsed2)
      { arr2.push(parsed2[x]);
        } 
        var array_keys = new Array(); 
        var array_values = new Array();
         }
   }