/// <summary>
/// Initializes a module and prepares it to handle requests.
/// </summary>
/// <param name="application">An <see cref="System.Web.HttpApplication"/> object that provides
/// references to the intrinsic server objects (for example,
/// Request, Response, Session, and Server) used to service HTTP requests.
/// </param>
/// <remarks>
/// </remarks>
void IHttpModule.Init(HttpApplication application)
{
if (application == null)
{
throw new ArgumentNullException("application");
}
HttpContext context = application.Context;
this._onAcqStateHandler = new EventHandler(OnAcquireRequestState);
this._onReleaseStateHandler = new EventHandler(OnReleaseRequestState);
this._onDisposeHandler = new EventHandler(this.OnDisposed);
this._onEnd = new EventHandler(this.OnEnd);
application.AcquireRequestState += this._onAcqStateHandler;
application.ReleaseRequestState += this._onReleaseStateHandler;
application.Disposed += this._onDisposeHandler;
application.EndRequest += this._onEnd;
if (NCacheSessionStateConfigReader.LoadSessionLocationSettings() != null)
{
this._isLocationAffinityEnabled = true;
}
GetCache(context);
application.Application["NSessionStateModule"] = this;
}
private void InitializeCache()
{
lock (s_dataLock)
{
try
{
if (_cache == null)
{
LegacyProvider.s_onAppDomainUnload = new EventHandler(OnAppDomainUnload);
System.Threading.Thread.GetDomain().DomainUnload += LegacyProvider.s_onAppDomainUnload;
if (_logs || _detailedLogs)
{
if (_ncacheLog == null)
{
_ncacheLog = new NCacheLogger();
_ncacheLog.Initialize(LoggerNames.SessionStoreProvider, _cacheId);
if (_detailedLogs)
{
NCacheLog.SetLevel("all");
}
else
{
if (_logs)
{
NCacheLog.SetLevel("info");
}
}
}
}
if (_isLocationAffinityEnabled)
{
_cache = new RegionalCache(_ncacheLog, NCacheSessionStateConfigReader.LoadSessionLocationSettings());
}
else
{
_cache = new SingleRegionCache(_operationRetry, _operationRetryInterval);
}
_cache.InitializeCache(_cacheId);
_cache.ExceptionsEnabled = true;
s_cacheNeedInit = false;
if (_logs)
{
NCacheLog.Info("NSessionStoreProvider initialized");
}
Thread.Sleep(_inprocDelay);
}
}
catch (Exception exc)
{
_cache = null; // so that next time cache can be initialized. Check the above condition if(_cache == null)
RaiseException(exc);
}
}
}
public override void Initialize(string name, NameValueCollection config)
{
base.Initialize(name, config);
_store = new SessionStore();
var appName = System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath;
Configuration cfg = WebConfigurationManager.OpenWebConfiguration(appName);
SessionStateSection sessionConfig = (SessionStateSection)cfg.GetSection("system.web/sessionState");
config["defaultSessionTimeout"] = sessionConfig.Timeout.Minutes.ToString();
_store.Initialize(name, config, NCacheSessionStateConfigReader.LoadSessionLocationSettings());
}
private void InitializeCache(HttpApplication application)
{
this._cacheId = ConfigurationSettings.AppSettings["cacheName"];
if (this._cacheId == null || this._cacheId == string.Empty)
{
throw new ConfigurationException("The 'cacheName' attribute cannot be null or empty string");
}
string[] boolValStrings = { "exceptionsEnabled", "writeExceptionsToEventLog",
"enableLogs", "enableDetailLogs", "clearASPSession" };
string configVal = null;
bool value = false;
for (int i = 0; i < boolValStrings.Length; i++)
{
configVal = ConfigurationSettings.AppSettings[boolValStrings[i]];
if (configVal != null)
{
if (configVal != "true" && configVal != "false")
{
throw new ConfigurationException("The '" + boolValStrings[i] + "' attribute must be one of the following values: true, false.");
}
else
{
value = Convert.ToBoolean(configVal);
switch (i)
{
case 0: this._exceptionsEnabled = value; break;
case 1: this._writeExceptionsToEventLog = value; break;
case 2: this._logs = value; break;
case 3: this._detailedLogs = value; break;
case 4: this._clearASPSession = value; break;
}
}
}
}
if (this._logs || this._detailedLogs)
{
if (_ncacheLog == null)
{
_ncacheLog = new NCacheLogger();
_ncacheLog.Initialize(LoggerNames.HttpModule, this._cacheId);
if (this._detailedLogs)
{
NCacheLog.SetLevel("all");
}
else
{
if (this._logs)
{
NCacheLog.SetLevel("info");
}
}
}
}
_applicationId = ConfigurationSettings.AppSettings["sessionAppId"];
if (_isLocationAffinityEnabled)
{
_cache = new RegionalCache(_ncacheLog, NCacheSessionStateConfigReader.LoadSessionLocationSettings());
}
else
{
_cache = new SingleRegionCache();
}
try
{
this._cache.InitializeCache(this._cacheId);
this._cache.ExceptionsEnabled = true;
if (NCacheLog != null)
{
NCacheLog.Info("NSessionStateModule initialized");
}
application.Application["NSessionStateModule.Cache"] = this._cache;
}
catch (Exception e)
{
RaiseExceptions(e);
}
}
/// <summary>
/// Initializes the provider. Takes, as input, the name of the provider and a
/// NameValueCollection of configuration settings. This method is used to set
/// property values for the provider instance, including implementation-specific
/// values and options specified in the configuration file
/// (Machine.config or Web.config).
///
/// "name" The friendly name of the provider.</param>
/// config A collection of the name/value pairs representing the
/// provider-specific attributes specified in the
/// configuration for this provider.</param>
/// </summary>
/// <param name="name">Friendly name of provider</param>
/// <param name="config">Representing the provider specific attributes</param>
public override void Initialize(string name, NameValueCollection config)
{
if (config == null)
{
throw new ArgumentNullException("config");
}
if (string.IsNullOrEmpty(config["cacheName"]))
{
throw new ConfigurationErrorsException("The 'cacheName' attribute cannot be null or empty string");
}
if (string.IsNullOrEmpty(config["description"]))
{
config["description"] = "NCache Session Storage Provider";
}
if (name == null || name.Length == 0)
{
name = SOURCE;
}
//initialize the base class
base.Initialize(name, config);
//get the application virtual path
_appName = System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath;
if (NCacheSessionStateConfigReader.LoadSessionLocationSettings() != null)
{
_isLocationAffinityEnabled = true;
}
string[] boolValStrings = { "exceptionsEnabled", "writeExceptionsToEventLog",
"enableLogs", "enableDetailLogs", "enableSessionLocking" };
string configVal = null;
bool value = false;
for (int i = 0; i < boolValStrings.Length; i++)
{
configVal = config[boolValStrings[i]];
if (configVal != null)
{
if (configVal != "true" && configVal != "false")
{
throw new ConfigurationErrorsException("The '" + boolValStrings[i] + "' attribute must be one of the following values: true, false.");
}
else
{
value = Convert.ToBoolean(configVal);
switch (i)
{
case 0: _exceptionsEnabled = value; break;
case 1: _writeExceptionsToEventLog = value; break;
case 2: _logs = value; break;
case 3:
{
_detailedLogs = value;
_logs = value;
}
break;
case 4: _lockSessions = value; break;
}
}
}
}
if (config["sessionAppId"] != null)
{
s_applicationId = config["sessionAppId"];
}
if (config["sessionLockingRetry"] != null)
{
this._sessionLockingRetries = Convert.ToInt32(config["sessionLockingRetry"]);
}
if (config["emptySessionWhenLocked"] != null)
{
this._emptySessionWhenLocked = Convert.ToBoolean(config["emptySessionWhenLocked"]);
}
//get cache name from configurations
_cacheId = config["cacheName"];
Configuration cfg = WebConfigurationManager.OpenWebConfiguration(_appName);
SessionStateSection sessionConfig = (SessionStateSection)cfg.GetSection("system.web/sessionState");
_defaultTimeout = sessionConfig.Timeout.Minutes;
string inprocDelay = config["inprocDelay"];
if (!string.IsNullOrEmpty(inprocDelay))
{
_inprocDelay = Convert.ToInt32(inprocDelay);
}
if (_inprocDelay <= 5000)
{
_inprocDelay = 5000;
}
if (!String.IsNullOrEmpty(config["operationRetry"]))
{
try
{
this._operationRetry = Convert.ToInt32(config["operationRetry"]);
}
catch (Exception e)
{
throw new Exception("Invalid value specified for operationRetry.");
}
}
if (!String.IsNullOrEmpty(config["operationRetryInterval"]))
{
try
{
this._operationRetryInterval = Convert.ToInt32(config["operationRetryInterval"]);
}
catch (Exception e)
{
throw new Exception("Invalid value specified for operationRetryInterval.");
}
}
InitializeCache();
}
