I need advise how to configure persistence.xml in Java web project (without Spring) to use the cleardb_database_url so I could deploy succesffuly my database application to Heroku. I have found at Heroku site documentation how to use xml for configuring Spring, I even implemented that code to my persistence.xml but it didn't help.
I hope somebody can help me in configuring persistence.xml.
Many thanks in advance.
Regards, Sandra
