// Events
private void UnloadEventHandler(object sender, EventArgs e)
{
// Make non-blocking call to ProcessDispatcher to ThreadPool.QueueUserWorkItem to complete
// stopping of all start calls in this AppDomain. For containers shared among various AppDomains,
// this will just be a ref-count subtract. For non-shared containers, we will close the container
// and clean-up.
SqlDependencyProcessDispatcher dispatcher = SqlDependency.ProcessDispatcher;
if (null != dispatcher)
{
dispatcher.QueueAppDomainUnloading(SqlDependency.AppDomainKey);
}
}
private void UnloadEventHandler(object sender, EventArgs e)
{
IntPtr ptr;
Bid.NotificationsScopeEnter(out ptr, "<sc.SqlDependencyPerAppDomainDispatcher.UnloadEventHandler|DEP> %d#", this.ObjectID);
try
{
SqlDependencyProcessDispatcher processDispatcher = SqlDependency.ProcessDispatcher;
if (processDispatcher != null)
{
processDispatcher.QueueAppDomainUnloading(SqlDependency.AppDomainKey);
}
}
finally
{
Bid.ScopeLeave(ref ptr);
}
}
// ------
// Events
// ------
private void UnloadEventHandler(object sender, EventArgs e)
{
IntPtr hscp;
Bid.NotificationsScopeEnter(out hscp, "<sc.SqlDependencyPerAppDomainDispatcher.UnloadEventHandler|DEP> %d#", ObjectID);
try {
// Make non-blocking call to ProcessDispatcher to ThreadPool.QueueUserWorkItem to complete
// stopping of all start calls in this AppDomain. For containers shared among various AppDomains,
// this will just be a ref-count subtract. For non-shared containers, we will close the container
// and clean-up.
SqlDependencyProcessDispatcher dispatcher = SqlDependency.ProcessDispatcher;
if (null != dispatcher)
{
dispatcher.QueueAppDomainUnloading(SqlDependency.AppDomainKey);
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
private static void ObtainProcessDispatcher()
{
byte[] data = SNINativeMethodWrapper.GetData();
if (data == null)
{
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> nativeStorage null, obtaining dispatcher AppDomain and creating ProcessDispatcher.\n");
_AppDomain defaultAppDomain = SNINativeMethodWrapper.GetDefaultAppDomain();
if (defaultAppDomain != null)
{
ObjectHandle handle = CreateProcessDispatcher(defaultAppDomain);
if (handle != null)
{
SqlDependencyProcessDispatcher dispatcher = (SqlDependencyProcessDispatcher)handle.Unwrap();
if (dispatcher != null)
{
_processDispatcher = dispatcher.SingletonProcessDispatcher;
ObjRef objRef = GetObjRef(_processDispatcher);
BinaryFormatter formatter2 = new BinaryFormatter();
MemoryStream stream = new MemoryStream();
GetSerializedObject(objRef, formatter2, stream);
SNINativeMethodWrapper.SetData(stream.GetBuffer());
return;
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - ObjectHandle.Unwrap returned null!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyObtainProcessDispatcherFailureObjectHandle);
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - AppDomain.CreateInstance returned null!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyProcessDispatcherFailureCreateInstance);
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - unable to obtain default AppDomain!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyProcessDispatcherFailureAppDomain);
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> nativeStorage not null, obtaining existing dispatcher AppDomain and ProcessDispatcher.\n");
BinaryFormatter formatter = new BinaryFormatter();
MemoryStream stream2 = new MemoryStream(data);
_processDispatcher = GetDeserializedObject(formatter, stream2);
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> processDispatcher obtained, ID: %d\n", _processDispatcher.ObjectID);
}
private static void ObtainProcessDispatcher()
{
byte[] data = SNINativeMethodWrapper.GetData();
if (data == null)
{
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> nativeStorage null, obtaining dispatcher AppDomain and creating ProcessDispatcher.\n");
_AppDomain defaultAppDomain = SNINativeMethodWrapper.GetDefaultAppDomain();
if (defaultAppDomain != null)
{
ObjectHandle handle = CreateProcessDispatcher(defaultAppDomain);
if (handle != null)
{
SqlDependencyProcessDispatcher dispatcher = (SqlDependencyProcessDispatcher) handle.Unwrap();
if (dispatcher != null)
{
_processDispatcher = dispatcher.SingletonProcessDispatcher;
ObjRef objRef = GetObjRef(_processDispatcher);
BinaryFormatter formatter2 = new BinaryFormatter();
MemoryStream stream = new MemoryStream();
GetSerializedObject(objRef, formatter2, stream);
SNINativeMethodWrapper.SetData(stream.GetBuffer());
return;
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - ObjectHandle.Unwrap returned null!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyObtainProcessDispatcherFailureObjectHandle);
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - AppDomain.CreateInstance returned null!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyProcessDispatcherFailureCreateInstance);
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - unable to obtain default AppDomain!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyProcessDispatcherFailureAppDomain);
}
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> nativeStorage not null, obtaining existing dispatcher AppDomain and ProcessDispatcher.\n");
BinaryFormatter formatter = new BinaryFormatter();
MemoryStream stream2 = new MemoryStream(data);
_processDispatcher = GetDeserializedObject(formatter, stream2);
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> processDispatcher obtained, ID: %d\n", _processDispatcher.ObjectID);
}
private static ObjRef GetObjRef(SqlDependencyProcessDispatcher _processDispatcher)
{
return RemotingServices.Marshal(_processDispatcher);
}
internal static bool Start(string connectionString, string queue, bool useDefaults)
{
if (string.IsNullOrEmpty(connectionString))
{
if (null == connectionString)
{
throw ADP.ArgumentNull(nameof(connectionString));
}
else
{
throw ADP.Argument(nameof(connectionString));
}
}
if (!useDefaults && string.IsNullOrEmpty(queue))
{ // If specified but null or empty, use defaults.
useDefaults = true;
queue = null; // Force to null - for proper hashtable comparison for default case.
}
// End duplicate Start/Stop logic.
bool errorOccurred = false;
bool result = false;
lock (s_startStopLock)
{
try
{
if (null == s_processDispatcher)
{ // Ensure _processDispatcher reference is present - inside lock.
s_processDispatcher = SqlDependencyProcessDispatcher.SingletonProcessDispatcher;
}
if (useDefaults)
{ // Default listener.
string server = null;
DbConnectionPoolIdentity identity = null;
string user = null;
string database = null;
string service = null;
bool appDomainStart = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{ // CER to ensure that if Start succeeds we add to hash completing setup.
// Start using process wide default service/queue & database from connection string.
result = s_processDispatcher.StartWithDefault(
connectionString,
out server,
out identity,
out user,
out database,
ref service,
s_appDomainKey,
SqlDependencyPerAppDomainDispatcher.SingletonInstance,
out errorOccurred,
out appDomainStart);
}
finally
{
if (appDomainStart && !errorOccurred)
{ // If success, add to hashtable.
IdentityUserNamePair identityUser = new IdentityUserNamePair(identity, user);
DatabaseServicePair databaseService = new DatabaseServicePair(database, service);
if (!AddToServerUserHash(server, identityUser, databaseService))
{
try
{
Stop(connectionString, queue, useDefaults, true);
}
catch (Exception e)
{ // Discard stop failure!
if (!ADP.IsCatchableExceptionType(e))
{
throw;
}
ADP.TraceExceptionWithoutRethrow(e); // Discard failure, but trace for now.
}
throw SQL.SqlDependencyDuplicateStart();
}
}
}
}
else
{ // Start with specified service/queue & database.
result = s_processDispatcher.Start(
connectionString,
queue,
s_appDomainKey,
SqlDependencyPerAppDomainDispatcher.SingletonInstance);
// No need to call AddToServerDatabaseHash since if not using default queue user is required
// to provide options themselves.
}
}
catch (Exception e)
{
if (!ADP.IsCatchableExceptionType(e))
{
throw;
}
ADP.TraceExceptionWithoutRethrow(e); // Discard failure, but trace for now.
throw;
}
}
return(result);
}
private static void ObtainProcessDispatcher() {
byte[] nativeStorage = SNINativeMethodWrapper.GetData();
if (nativeStorage == null) {
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> nativeStorage null, obtaining dispatcher AppDomain and creating ProcessDispatcher.\n");
#if DEBUG // Possibly expensive, limit to debug.
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> AppDomain.CurrentDomain.FriendlyName: %ls\n", AppDomain.CurrentDomain.FriendlyName);
#endif
_AppDomain masterDomain = SNINativeMethodWrapper.GetDefaultAppDomain();
if (null != masterDomain) {
ObjectHandle handle = CreateProcessDispatcher(masterDomain);
if (null != handle) {
SqlDependencyProcessDispatcher dependency = (SqlDependencyProcessDispatcher) handle.Unwrap();
if (null != dependency) {
_processDispatcher = dependency.SingletonProcessDispatcher; // Set to static instance.
// Serialize and set in native.
ObjRef objRef = GetObjRef(_processDispatcher);
BinaryFormatter formatter = new BinaryFormatter();
MemoryStream stream = new MemoryStream();
GetSerializedObject(objRef, formatter, stream);
SNINativeMethodWrapper.SetData(stream.GetBuffer()); // Native will be forced to synchronize and not overwrite.
}
else {
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - ObjectHandle.Unwrap returned null!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyObtainProcessDispatcherFailureObjectHandle);
}
}
else {
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - AppDomain.CreateInstance returned null!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyProcessDispatcherFailureCreateInstance);
}
}
else {
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP|ERR> ERROR - unable to obtain default AppDomain!\n");
throw ADP.InternalError(ADP.InternalErrorCode.SqlDependencyProcessDispatcherFailureAppDomain);
}
}
else {
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> nativeStorage not null, obtaining existing dispatcher AppDomain and ProcessDispatcher.\n");
#if DEBUG // Possibly expensive, limit to debug.
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> AppDomain.CurrentDomain.FriendlyName: %ls\n", AppDomain.CurrentDomain.FriendlyName);
#endif
BinaryFormatter formatter = new BinaryFormatter();
MemoryStream stream = new MemoryStream(nativeStorage);
_processDispatcher = GetDeserializedObject(formatter, stream); // Deserialize and set for appdomain.
Bid.NotificationsTrace("<sc.SqlDependency.ObtainProcessDispatcher|DEP> processDispatcher obtained, ID: %d\n", _processDispatcher.ObjectID);
}
}
private static ObjRef GetObjRef(SqlDependencyProcessDispatcher _processDispatcher)
{
return(RemotingServices.Marshal(_processDispatcher));
}
internal SqlConnectionContainer(SqlDependencyProcessDispatcher.SqlConnectionContainerHashHelper hashHelper, string appDomainKey, bool useDefaults)
{
IntPtr ptr;
this._defaultWaitforTimeout = 0xea60;
this._objectID = Interlocked.Increment(ref _objectTypeCount);
Bid.NotificationsScopeEnter(out ptr, "<sc.SqlConnectionContainer|DEP> %d#, queue: '%ls'", this.ObjectID, hashHelper.Queue);
bool flag = false;
try
{
this._hashHelper = hashHelper;
string str = null;
if (useDefaults)
{
str = Guid.NewGuid().ToString();
this._queue = "SqlQueryNotificationService-" + str;
this._hashHelper.ConnectionStringBuilder.ApplicationName = this._queue;
}
else
{
this._queue = this._hashHelper.Queue;
}
this._con = new SqlConnection(this._hashHelper.ConnectionStringBuilder.ConnectionString);
((SqlConnectionString) this._con.ConnectionOptions).CreatePermissionSet().Assert();
this._con.Open();
this._cachedServer = this._con.DataSource;
if (!this._con.IsYukonOrNewer)
{
throw SQL.NotificationsRequireYukon();
}
if (hashHelper.Identity != null)
{
this._windowsIdentity = DbConnectionPoolIdentity.GetCurrentWindowsIdentity();
}
this._escapedQueueName = SqlConnection.FixupDatabaseTransactionName(this._queue);
this._appDomainKeyHash = new Dictionary<string, int>();
this._com = new SqlCommand();
this._com.Connection = this._con;
this._com.CommandText = "select is_broker_enabled from sys.databases where database_id=db_id()";
if (!((bool) this._com.ExecuteScalar()))
{
throw SQL.SqlDependencyDatabaseBrokerDisabled();
}
this._conversationGuidParam = new SqlParameter("@p1", SqlDbType.UniqueIdentifier);
this._timeoutParam = new SqlParameter("@p2", SqlDbType.Int);
this._timeoutParam.Value = 0;
this._com.Parameters.Add(this._timeoutParam);
flag = true;
this._receiveQuery = "WAITFOR(RECEIVE TOP (1) message_type_name, conversation_handle, cast(message_body AS XML) as message_body from " + this._escapedQueueName + "), TIMEOUT @p2;";
if (useDefaults)
{
this._sprocName = SqlConnection.FixupDatabaseTransactionName("SqlQueryNotificationStoredProcedure-" + str);
this.CreateQueueAndService(false);
}
else
{
this._com.CommandText = this._receiveQuery;
this._endConversationQuery = "END CONVERSATION @p1; ";
this._concatQuery = this._endConversationQuery + this._receiveQuery;
}
bool appDomainStart = false;
this.IncrementStartCount(appDomainKey, out appDomainStart);
this.SynchronouslyQueryServiceBrokerQueue();
this._timeoutParam.Value = this._defaultWaitforTimeout;
this.AsynchronouslyQueryServiceBrokerQueue();
}
catch (Exception exception)
{
if (!ADP.IsCatchableExceptionType(exception))
{
throw;
}
ADP.TraceExceptionWithoutRethrow(exception);
if (flag)
{
this.TearDownAndDispose();
}
else
{
if (this._com != null)
{
this._com.Dispose();
this._com = null;
}
if (this._con != null)
{
this._con.Dispose();
this._con = null;
}
}
throw;
}
finally
{
Bid.ScopeLeave(ref ptr);
}
}
