cannot access service from Component.js?

I created a sapui5 application and added northwind odata service in it.And in init method of component.js i wrote below code.Page is not loading what am i doing wrong.Iam using cloud trial version of sapwebide.Please help

var mConfig = this.getMetadata().getConfig();

  var sServiceUrl = mConfig.serviceConfig.serviceUrl;

  // Create and set domain model to the component

  var oModel = new sap.ui.model.odata.ODataModel(sServiceUrl, {

     json: true,

     loadMetadataAsync: true

  });

  oModel.attachMetadataFailed(function() {

     this.getEventBus().publish("Component", "MetadataFailed");

  }, this);

  this.setModel(oModel);

Regards