private DbConnectionInternal CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
{
DbConnectionInternal newObj = null;
try
{
newObj = _connectionFactory.CreatePooledConnection(this, owningObject, _connectionPoolGroup.ConnectionOptions, _connectionPoolGroup.PoolKey, userOptions);
if (null == newObj)
{
throw ADP.InternalError(ADP.InternalErrorCode.CreateObjectReturnedNull); // CreateObject succeeded, but null object
}
if (!newObj.CanBePooled)
{
throw ADP.InternalError(ADP.InternalErrorCode.NewObjectCannotBePooled); // CreateObject succeeded, but non-poolable object
}
newObj.PrePush(null);
lock (_objectList)
{
if ((oldConnection != null) && (oldConnection.Pool == this))
{
_objectList.Remove(oldConnection);
}
_objectList.Add(newObj);
_totalObjects = _objectList.Count;
}
// If the old connection belonged to another pool, we need to remove it from that
if (oldConnection != null)
{
var oldConnectionPool = oldConnection.Pool;
if (oldConnectionPool != null && oldConnectionPool != this)
{
Debug.Assert(oldConnectionPool._state == State.ShuttingDown, "Old connections pool should be shutting down");
lock (oldConnectionPool._objectList)
{
oldConnectionPool._objectList.Remove(oldConnection);
oldConnectionPool._totalObjects = oldConnectionPool._objectList.Count;
}
}
}
}
catch (Exception e)
{
if (!ADP.IsCatchableExceptionType(e))
{
throw;
}
newObj = null; // set to null, so we do not return bad new object
throw;
}
return(newObj);
}
internal void PutObject(DbConnectionInternal obj, object owningObject)
{
Debug.Assert(null != obj, "null obj?");
// Once a connection is closing (which is the state that we're in at
// this point in time) you cannot delegate a transaction to or enlist
// a transaction in it, so we can correctly presume that if there was
// not a delegated or enlisted transaction to start with, that there
// will not be a delegated or enlisted transaction once we leave the
// lock.
lock (obj)
{
// Calling PrePush prevents the object from being reclaimed
// once we leave the lock, because it sets _pooledCount such
// that it won't appear to be out of the pool. What that
// means, is that we're now responsible for this connection:
// it won't get reclaimed if we drop the ball somewhere.
obj.PrePush(owningObject);
}
DeactivateObject(obj);
}
internal void PutObject(DbConnectionInternal obj, object owningObject)
{
Debug.Assert(null != obj, "null obj?");
// Once a connection is closing (which is the state that we're in at
// this point in time) you cannot delegate a transaction to or enlist
// a transaction in it, so we can correctly presume that if there was
// not a delegated or enlisted transaction to start with, that there
// will not be a delegated or enlisted transaction once we leave the
// lock.
lock (obj)
{
// Calling PrePush prevents the object from being reclaimed
// once we leave the lock, because it sets _pooledCount such
// that it won't appear to be out of the pool. What that
// means, is that we're now responsible for this connection:
// it won't get reclaimed if we drop the ball somewhere.
obj.PrePush(owningObject);
}
DeactivateObject(obj);
}
private bool ReclaimEmancipatedObjects()
{
bool emancipatedObjectFound = false;
List <DbConnectionInternal> reclaimedObjects = new List <DbConnectionInternal>();
int count;
lock (_objectList)
{
count = _objectList.Count;
for (int i = 0; i < count; ++i)
{
DbConnectionInternal obj = _objectList[i];
if (null != obj)
{
bool locked = false;
try
{
Monitor.TryEnter(obj, ref locked);
if (locked)
{ // avoid race condition with PrePush/PostPop and IsEmancipated
if (obj.IsEmancipated)
{
// Inside the lock, we want to do as little
// as possible, so we simply mark the object
// as being in the pool, but hand it off to
// an out of pool list to be deactivated,
// etc.
obj.PrePush(null);
reclaimedObjects.Add(obj);
}
}
}
finally
{
if (locked)
{
Monitor.Exit(obj);
}
}
}
}
}
// NOTE: we don't want to call DeactivateObject while we're locked,
// because it can make roundtrips to the server and this will block
// object creation in the pooler. Instead, we queue things we need
// to do up, and process them outside the lock.
count = reclaimedObjects.Count;
for (int i = 0; i < count; ++i)
{
DbConnectionInternal obj = reclaimedObjects[i];
emancipatedObjectFound = true;
DeactivateObject(obj);
}
return(emancipatedObjectFound);
}
private DbConnectionInternal CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
{
DbConnectionInternal newObj = null;
try
{
newObj = _connectionFactory.CreatePooledConnection(this, owningObject, _connectionPoolGroup.ConnectionOptions, _connectionPoolGroup.PoolKey, userOptions);
if (null == newObj)
{
throw ADP.InternalError(ADP.InternalErrorCode.CreateObjectReturnedNull); // CreateObject succeeded, but null object
}
if (!newObj.CanBePooled)
{
throw ADP.InternalError(ADP.InternalErrorCode.NewObjectCannotBePooled); // CreateObject succeeded, but non-poolable object
}
newObj.PrePush(null);
lock (_objectList)
{
if ((oldConnection != null) && (oldConnection.Pool == this))
{
_objectList.Remove(oldConnection);
}
_objectList.Add(newObj);
_totalObjects = _objectList.Count;
}
// If the old connection belonged to another pool, we need to remove it from that
if (oldConnection != null)
{
var oldConnectionPool = oldConnection.Pool;
if (oldConnectionPool != null && oldConnectionPool != this)
{
Debug.Assert(oldConnectionPool._state == State.ShuttingDown, "Old connections pool should be shutting down");
lock (oldConnectionPool._objectList)
{
oldConnectionPool._objectList.Remove(oldConnection);
oldConnectionPool._totalObjects = oldConnectionPool._objectList.Count;
}
}
}
// Reset the error wait:
_errorWait = ERROR_WAIT_DEFAULT;
}
catch (Exception e)
{
if (!ADP.IsCatchableExceptionType(e))
{
throw;
}
newObj = null; // set to null, so we do not return bad new object
// Failed to create instance
_resError = e;
// Make sure the timer starts even if ThreadAbort occurs after setting the ErrorEvent.
// timer allocation has to be done out of CER block
Timer t = new Timer(new TimerCallback(this.ErrorCallback), null, Timeout.Infinite, Timeout.Infinite);
bool timerIsNotDisposed;
try { }
finally
{
_waitHandles.ErrorEvent.Set();
_errorOccurred = true;
// Enable the timer.
// Note that the timer is created to allow periodic invocation. If ThreadAbort occurs in the middle of ErrorCallback,
// the timer will restart. Otherwise, the timer callback (ErrorCallback) destroys the timer after resetting the error to avoid second callback.
_errorTimer = t;
timerIsNotDisposed = t.Change(_errorWait, _errorWait);
}
Debug.Assert(timerIsNotDisposed, "ErrorCallback timer has been disposed");
if (30000 < _errorWait)
{
_errorWait = 60000;
}
else
{
_errorWait *= 2;
}
throw;
}
return(newObj);
}
