getting JSON Exception while reading file in custom transport handler InputStream is = replicationTransaction.getContent().getInputStream();jsonTxt = IOUtils.toString( is );JSONObject pageContent = new JSONObject(jsonTxt); THE SAME IS working if i try to print the file content in content builder

How to trigger a process when something on my site is updated in publish?Thanks,Sharath 

I am trying to generate a report on my site.It should contain a report or graph about the changes made to the site.How can I achieve that? ThanksSharath