Thanks @Manisha_Mirchandani  I have written the sling model exporter for all the components but I am not getting how will I use this model.tidy.json in my service or servlet class. I tried to write the http request but not getting any response from the model. 

I am working in one of the requirement where I need to create the page JSON form the all available components on the page . I tried to create the workflow process in the custom process I tried to get the all the current page's components but I am not able to get the all the component nodes and also ...