Nhibernate architecture UML diagram

We can see that session and sessionfactory are the core parts of Nhibernate.

Sessionfactory maintains connections to the persistent mechanism (database) and manages them. It also saves the ing information of all persistent objects.
Sessionfactory is created by configuration. buildsessionfactory. This object generally uses the singleton mode.

Session is used to persist objects and support database transactions. In addition, session also provides powerful data loading functions.
The session is created by sessionfactory.

Other Object Description:
Iconnectionprovider: Connection provider interface, responsible for connecting to data;
Dialect: Database dialect;
Collectionpersister: Set persistence class;
Iclasspersister: Class persistence interface, which defines basic CRUD operations;
Transactionfactory: Database Transaction factory;
Iinterceptor: the interceptor interface, which is used for processing during Operation execution. A typical operation log is recorded;