Create UUID using ajax call

Below code represents, How to create UUID using  Liferay API with AJAX call :


In JSP File :

<portlet:resourceURL var="generateUUID" id="generateUUID"/>
<a href="javascript:void(0);" onclick="javascript:loadUUID();"> Generate UUID </a>

In JSP File (<aui:script>) :

var generateUUID = loadUUID();
    alert(generateUUID);
    
    function loadUUID(){
     var uuid = "";
     A.io.request('${generateUUID}', {
                 method: 'POST',
                 dataType: 'json',
                 data: {
                     generateUUID: true
                 },
                 sync: true,
                 on: {
                     success: function() {
                     var test = this.get('responseData');
         uuid = test.uuid;  
                     },
                     failure: function() {
                       alert('failure');
                      
                     }
                 }
                 
     });
     return uuid;
    }

In Controller Class :

 private String generateUUID()
    {
        return UUID.randomUUID().toString();
    }

In Controller Class  (ServeResource Method):

boolean generateUUID = ParamUtil.getBoolean(aResourceRequest, "generateUUID");
        if (generateUUID)
        {
             aResourceResponse.getWriter().print(
                    JSONFactoryUtil.createJSONObject().put("uuid", generateUUID().toString()));
            return;
        }