using System; using System.Web; using BasicSample.Data; namespace BasicSample.Web { /// <summary> /// Implements the Open-Session-In-View pattern using <see cref="NHibernateSessionManager" />. /// Assumes that each HTTP request is given a single transaction for the entire page-lifecycle. /// Inspiration for this class came from Ed Courtenay at /// http://sourceforge.net/forum/message.php?msg_id=2847509. /// </summary> public class NHibernateSessionModule : IHttpModule { public void Init(HttpApplication context) { context.BeginRequest += new EventHandler(BeginTransaction); context.EndRequest += new EventHandler(CommitAndCloseSession); } /// <summary> /// Opens a session within a transaction at the beginning of the HTTP request. /// This doesn't actually open a connection to the database until needed. /// </summary> private void BeginTransaction(object sender, EventArgs e) { NHibernateSessionManager.Instance.BeginTransaction(); } /// <summary> /// Commits and closes the NHibernate session provided by the supplied <see cref="NHibernateSessionManager"/>. /// Assumes a transaction was begun at the beginning of the request; but a transaction or session does /// not *have* to be opened for this to operate successfully. /// </summary> private void CommitAndCloseSession(object sender, EventArgs e) { try { NHibernateSessionManager.Instance.CommitTransaction(); } finally { NHibernateSessionManager.Instance.CloseSession(); } } public void Dispose() { } } }
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