SessionFactory is threadsafe and implemented as singleton since it includes same infrastructure hibernate config file, mapping file
session put in interceptor and implemented as thread local to solve the problem: view rendering fails due to lazily fetching of hibernate
remove OneToMany relation in EntInfo to fix bug: lazy fetching
separate Power Query function to independent file
1.Don't put extra query prama in url;2.add formatter to handle nested json property;
Add interceptor for hibernate
add Power Stat