convertLeadController.js

({
    handleDestroy : function (component, event, helper) {
        var val = event.getParam("value");
        // Do something else here
        var action = component.get("c.clearData");
        action.setParams({ 
            recId : component.get("v.recordId") 
        });
        // Create a callback that is executed after 
        // the server-side action returns
        action.setCallback(this, function(response) {
            var state = response.getState();
            if (state === "SUCCESS") {
                // Alert the user with the value returned 
                // from the server
                console.log("From server: " + response.getReturnValue());

                // You would typically fire a event here to trigger 
                // client-side notification that the server-side 
                // action is complete
            }
        });
        $A.enqueueAction(action);
      }
})