I just read http://www.laliluna.de/first-java-server-faces-tutorial.html
and don't understand one thing: All action listener methods access the session. Why? Take a look at the "deleteBook" method, for instance. Instead of passing the book-ID direktly, its parameter is an event. Why? I mean, could the listBooks.jsp not simply pass the Book-ID as parameter to the method so that the parameter of deleteBook would be ID instead of event? Why is it necessary to access the session in every action listener and pass them events instead of IDs? Thanks Matt
