// This method is called upon Execute of a command associated with a SqlDependency object.
internal string AddCommandEntry(string commandHash, SqlDependency dep)
{
string notificationId = string.Empty;
lock (_instanceLock)
{
if (_dependencyIdToDependencyHash.ContainsKey(dep.Id))
{
// check if we already have notification associated with given command hash
if (_commandHashToNotificationId.TryGetValue(commandHash, out notificationId))
{
// we have one or more SqlDependency instances with same command hash
DependencyList dependencyList = null;
if (!_notificationIdToDependenciesHash.TryGetValue(notificationId, out dependencyList))
{
// this should not happen since _commandHashToNotificationId and _notificationIdToDependenciesHash are always
// updated together
Debug.Fail("_commandHashToNotificationId has entries that were removed from _notificationIdToDependenciesHash. Remember to keep them in sync");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyCommandHashIsNotAssociatedWithNotification);
}
// join the new dependency to the list
if (!dependencyList.Contains(dep))
{
dependencyList.Add(dep);
}
}
else
{
// we did not find notification ID with the same app domain and command hash, create a new one
// use unique guid to avoid duplicate IDs
// prepend app domain ID to the key - SqlConnectionContainer::ProcessNotificationResults (SqlDependencyListener.cs)
// uses this app domain ID to route the message back to the app domain in which this SqlDependency was created
notificationId = string.Format(System.Globalization.CultureInfo.InvariantCulture,
"{0};{1}",
SqlDependency.AppDomainKey, // must be first
Guid.NewGuid().ToString("D", System.Globalization.CultureInfo.InvariantCulture)
);
DependencyList dependencyList = new DependencyList(commandHash);
dependencyList.Add(dep);
// map command hash to notification we just created to reuse it for the next client
_commandHashToNotificationId.Add(commandHash, notificationId);
_notificationIdToDependenciesHash.Add(notificationId, dependencyList);
}
Debug.Assert(_notificationIdToDependenciesHash.Count == _commandHashToNotificationId.Count, "always keep these maps in sync!");
}
}
return(notificationId);
}
internal string AddCommandEntry(string commandHash, SqlDependency dep)
{
IntPtr ptr;
string str = string.Empty;
Bid.NotificationsScopeEnter(out ptr, "<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> %d#, commandHash: '%ls', SqlDependency: %d#", this.ObjectID, commandHash, dep.ObjectID);
try
{
lock (this)
{
if (!this._dependencyIdToDependencyHash.ContainsKey(dep.Id))
{
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Dependency not present in depId->dep hash, must have been invalidated.\n");
return(str);
}
if (this._commandHashToNotificationId.TryGetValue(commandHash, out str))
{
DependencyList list2 = null;
if (!this._notificationIdToDependenciesHash.TryGetValue(str, out list2))
{
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyCommandHashIsNotAssociatedWithNotification);
}
if (!list2.Contains(dep))
{
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Dependency not present for commandHash, adding.\n");
list2.Add(dep);
return(str);
}
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Dependency already present for commandHash.\n");
return(str);
}
str = string.Format(CultureInfo.InvariantCulture, "{0};{1}", new object[] { SqlDependency.AppDomainKey, Guid.NewGuid().ToString("D", CultureInfo.InvariantCulture) });
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Creating new Dependencies list for commandHash.\n");
DependencyList list = new DependencyList(commandHash)
{
dep
};
try
{
}
finally
{
this._commandHashToNotificationId.Add(commandHash, str);
this._notificationIdToDependenciesHash.Add(str, list);
}
return(str);
}
}
finally
{
Bid.ScopeLeave(ref ptr);
}
return(str);
}
// This method is called upon Execute of a command associated with a SqlDependency object.
internal string AddCommandEntry(string commandHash, SqlDependency dep)
{
IntPtr hscp;
string notificationId = string.Empty;
Bid.NotificationsScopeEnter(out hscp, "<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> %d#, commandHash: '%ls', SqlDependency: %d#", ObjectID, commandHash, dep.ObjectID);
try {
lock (this) {
if (!_dependencyIdToDependencyHash.ContainsKey(dep.Id)) // Determine if depId->dep hashtable contains dependency. If not, it's been invalidated.
{
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Dependency not present in depId->dep hash, must have been invalidated.\n");
}
else
{
// check if we already have notification associated with given command hash
if (_commandHashToNotificationId.TryGetValue(commandHash, out notificationId))
{
// we have one or more SqlDependency instances with same command hash
DependencyList dependencyList = null;
if (!_notificationIdToDependenciesHash.TryGetValue(notificationId, out dependencyList))
{
// this should not happen since _commandHashToNotificationId and _notificationIdToDependenciesHash are always
// updated together
Debug.Assert(false, "_commandHashToNotificationId has entries that were removed from _notificationIdToDependenciesHash. Remember to keep them in [....]");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyCommandHashIsNotAssociatedWithNotification);
}
// join the new dependency to the list
if (!dependencyList.Contains(dep))
{
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Dependency not present for commandHash, adding.\n");
dependencyList.Add(dep);
}
else
{
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Dependency already present for commandHash.\n");
}
}
else
{
// we did not find notification ID with the same app domain and command hash, create a new one
// use unique guid to avoid duplicate IDs
// prepend app domain ID to the key - SqlConnectionContainer::ProcessNotificationResults (SqlDependencyListener.cs)
// uses this app domain ID to route the message back to the app domain in which this SqlDependency was created
notificationId = string.Format(System.Globalization.CultureInfo.InvariantCulture,
"{0};{1}",
SqlDependency.AppDomainKey, // must be first
Guid.NewGuid().ToString("D", System.Globalization.CultureInfo.InvariantCulture)
);
Bid.NotificationsTrace("<sc.SqlDependencyPerAppDomainDispatcher.AddCommandEntry|DEP> Creating new Dependencies list for commandHash.\n");
DependencyList dependencyList = new DependencyList(commandHash);
dependencyList.Add(dep);
// map command hash to notification we just created to reuse it for the next client
// do it inside finally block to avoid ThreadAbort exception interrupt this operation
try {}
finally {
_commandHashToNotificationId.Add(commandHash, notificationId);
_notificationIdToDependenciesHash.Add(notificationId, dependencyList);
}
}
Debug.Assert(_notificationIdToDependenciesHash.Count == _commandHashToNotificationId.Count, "always keep these maps in [....]!");
}
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
return(notificationId);
}
