internal SqlNotification(SqlNotificationInfo info, SqlNotificationSource source, SqlNotificationType type, string key)
{
_info = info;
_source = source;
_type = type;
_key = key;
}
internal void Invalidate(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source)
{
List <EventContextPair> eventList = null;
lock (_eventHandlerLock)
{
if (_dependencyFired &&
SqlNotificationInfo.AlreadyChanged != info &&
SqlNotificationSource.Client != source)
{
if (ExpirationTime >= DateTime.UtcNow)
{
Debug.Fail("Received notification twice - we should never enter this state!");
}
}
else
{
// It is the invalidators responsibility to remove this dependency from the app domain static hash.
_dependencyFired = true;
eventList = _eventList;
_eventList = new List <EventContextPair>(); // Since we are firing the events, null so we do not fire again.
}
}
if (eventList != null)
{
foreach (EventContextPair pair in eventList)
{
pair.Invoke(new SqlNotificationEventArgs(type, info, source));
}
}
}
internal void Invalidate(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source)
{
IntPtr ptr;
Bid.NotificationsScopeEnter(out ptr, "<sc.SqlDependency.Invalidate|DEP> %d#", this.ObjectID);
try
{
List <EventContextPair> list = null;
lock (this._eventHandlerLock)
{
if ((this._dependencyFired && (SqlNotificationInfo.AlreadyChanged != info)) && (SqlNotificationSource.Client != source))
{
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP|ERR> ERROR - notification received twice - we should never enter this state!");
}
else
{
this._dependencyFired = true;
list = this._eventList;
this._eventList = new List <EventContextPair>();
}
}
if (list != null)
{
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP> Firing events.\n");
foreach (EventContextPair pair in list)
{
pair.Invoke(new SqlNotificationEventArgs(type, info, source));
}
}
}
finally
{
Bid.ScopeLeave(ref ptr);
}
}
internal SqlNotification(SqlNotificationInfo info, SqlNotificationSource source, SqlNotificationType type, string key)
{
this._info = info;
this._source = source;
this._type = type;
this._key = key;
}
public SqlNotificationEventArgs(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source)
{
_info = info;
_source = source;
_type = type;
}
public SqlNotificationEventArgs(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source)
{
this.type = type;
this.info = info;
this.source = source;
}
public SqlNotificationEventArgs(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source) {
_info = info;
_source = source;
_type = type;
}
internal void Invalidate(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source)
{
IntPtr ptr;
Bid.NotificationsScopeEnter(out ptr, "<sc.SqlDependency.Invalidate|DEP> %d#", this.ObjectID);
try
{
List<EventContextPair> list = null;
lock (this._eventHandlerLock)
{
if ((this._dependencyFired && (SqlNotificationInfo.AlreadyChanged != info)) && (SqlNotificationSource.Client != source))
{
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP|ERR> ERROR - notification received twice - we should never enter this state!");
}
else
{
this._dependencyFired = true;
list = this._eventList;
this._eventList = new List<EventContextPair>();
}
}
if (list != null)
{
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP> Firing events.\n");
foreach (EventContextPair pair in list)
{
pair.Invoke(new SqlNotificationEventArgs(type, info, source));
}
}
}
finally
{
Bid.ScopeLeave(ref ptr);
}
}
internal void Invalidate(SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source) {
IntPtr hscp;
Bid.NotificationsScopeEnter(out hscp, "<sc.SqlDependency.Invalidate|DEP> %d#", ObjectID);
try {
List<EventContextPair> eventList = null;
lock (_eventHandlerLock) {
if (_dependencyFired &&
SqlNotificationInfo.AlreadyChanged != info &&
SqlNotificationSource.Client != source) {
if (ExpirationTime < DateTime.UtcNow) {
// There is a small window in which SqlDependencyPerAppDomainDispatcher.TimeoutTimerCallback
// raises Timeout event but before removing this event from the list. If notification is received from
// server in this case, we will hit this code path.
// It is safe to ignore this race condition because no event is sent to user and no leak happens.
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP> ignore notification received after timeout!");
}
else {
Debug.Assert(false, "Received notification twice - we should never enter this state!");
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP|ERR> ERROR - notification received twice - we should never enter this state!");
}
}
else {
// It is the invalidators responsibility to remove this dependency from the app domain static hash.
_dependencyFired = true;
eventList = _eventList;
_eventList = new List<EventContextPair>(); // Since we are firing the events, null so we do not fire again.
}
}
if (eventList != null) {
Bid.NotificationsTrace("<sc.SqlDependency.Invalidate|DEP> Firing events.\n");
foreach(EventContextPair pair in eventList) {
pair.Invoke(new SqlNotificationEventArgs(type, info, source));
}
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
public SqlNotificationEventArgs( SqlNotificationType type, SqlNotificationInfo info, SqlNotificationSource source) {
this.type = type;
this.info = info;
this.source = source;
}
