UnitOfWorkFactoryBase¶

UnitOfWorkFactoryBase implements IUnitOfWorkFactory and owns the connection-string-keyed ISessionFactory caching, per-process locking, and ISessionHelper construction shared across engines; OracleUnitOfWorkFactory, OracleStatelessUnitOfWorkFactory, and SqlServerUnitOfWorkFactory supply only the engine/session-strategy-specific session-opening logic (CreateUnitOfWork).

Purpose¶

Caches ISessionFactory instances in a static dictionary keyed by connection string, guarded by a lock, so repeated GetUnitOfWork calls for the same connection string reuse the same factory.
Resolves the PersistenceConfiguration for a connection string (via the injected IConfigurationFactory) and calls Configuration.BuildSessionFactory() when no cached factory exists.
Builds the engine-specific ISessionHelper (OracleSessionHelper/SqlServerSessionHelper) to pair with the opened session.

Context¶

Namespace: SAIF.Data.NHibernate
Assembly/package: SAIF.Framework.Data.NHibernate

Public members¶

Member	Signature	Purpose
GetUnitOfWork	`NHibernateUnitOfWork GetUnitOfWork(string connectionString, int batchSize, bool showSql)`	Locks the static `SessionFactories` dictionary, gets-or-adds an `ISessionFactory` via `BuildSessionFactory`, calls the subclass's `CreateUnitOfWork(factory)` override, builds the matching `ISessionHelper`, and returns a new `NHibernateUnitOfWork`.

Protected members¶

Member	Signature	Purpose
BuildSessionFactory	`protected ISessionFactory BuildSessionFactory(string connectionString, int batchSize, bool showSql)`	Resolves the `PersistenceConfiguration` via the injected `IConfigurationFactory` and calls `Configuration.BuildSessionFactory()`.
CreateUnitOfWork	`protected abstract ISessionStrategy CreateUnitOfWork(ISessionFactory factory)`	Engine/session-strategy-specific: opens a stateful `ISession` (`CreateSessionUnitOfWork`) or stateless `IStatelessSession` (`CreateStatelessSessionUnitOfWork`) and wraps it in the matching `ISessionStrategy` implementation.
BuildSessionHelper	`protected abstract ISessionHelper BuildSessionHelper()`	Engine-specific: builds `OracleSessionHelper` or `SqlServerSessionHelper`.

Behavioral notes¶

The SessionFactories dictionary and its lock are static and shared per-process across all connection strings passed to any instance of this class or its subclasses.
A new NHibernateUnitOfWork (and a new underlying session) is returned on every call — only the ISessionFactory is cached, not the session itself.

Constraints and usage notes¶

Subclasses must implement CreateUnitOfWork and BuildSessionHelper; UnitOfWorkFactoryBase itself cannot be instantiated directly.

Sources¶

Factories/UnitOfWorkFactoryBase.cs