private DBPooledObject CreateObject()
{
DBPooledObject newObj = null;
try {
newObj = PoolControl.CreateObject(this);
Debug.Assert(newObj != null, "CreateObject succeeded, but object null");
newObj.PrePush(null);
lock (_objectList.SyncRoot) {
_objectList.Add(newObj);
#if !USECOUNTEROBJECT
_totalObjects = _objectList.Count;
#endif //!USECOUNTEROBJECT
}
#if USECOUNTEROBJECT
_poolCounter.Modify(cAddTotal);
#endif //USECOUNTEROBJECT
#if ALLOWTRACING
ADP.TraceObjectPoolActivity("CreateObject", newObj);
#endif //ALLOWTRACING
// Reset the error wait:
_errorWait = ERROR_WAIT_DEFAULT;
}
catch (Exception e) {
ADP.TraceException(e);
newObj = null; // set to null, so we do not return bad new object
// Failed to create instance
_resError = e;
SafeNativeMethods.SetEvent(_waitHandles[ERROR_HANDLE].Handle);
#if USECOUNTEROBJECT
_poolCounter.Modify(cErrorFlag);
#else //!USECOUNTEROBJECT
_errorOccurred = true;
#endif //!USECOUNTEROBJECT
_errorTimer = new Timer(new TimerCallback(this.ErrorCallback), null, _errorWait, _errorWait);
_errorWait *= 2;
}
return(newObj);
}
public void PutObject(DBPooledObject obj, object owningObject)
{
if (obj == null)
{
throw ADP.ArgumentNull("obj");
}
obj.PrePush(owningObject);
if (_state != State.ShuttingDown)
{
bool isInTransaction = obj.Deactivate();
if (obj.CanBePooled())
{
#if USEORAMTS
ITransaction transaction = obj.ManualEnlistedTransaction;
if (null != transaction)
{
// When the object is put back into the pool while it is manually
// enlisted in a distributed transaction, we must create an outcome
// event and let the object wait until the distributed transaction
// has finished. Once it does, the TransactionOutcomeEvents class
// can put it back into the general population of the pool.
UCOMIConnectionPoint point = (UCOMIConnectionPoint)transaction;
TransactionOutcomeEvents outcomeEvent = new TransactionOutcomeEvents(this, obj, point);
Int32 cookie = 0;
point.Advise(outcomeEvent, out cookie); // Register for callbacks, obtain cookie
outcomeEvent.SetCookie(cookie); // Set the cookie on the event
#if ALLOWTRACING
ADP.TraceObjectPoolActivity("WaitForOutcomeEvnt", obj);
#endif //ALLOWTRACING
return;
}
#endif //USEORAMTS
// Try shoving it in the tx context first. If that succeeds,
// we're done.
if (isInTransaction && TryPutResourceInContext(obj))
{
return;
}
// If the above failed, we just shove it into our current collection
PutNewObject(obj);
}
else
{
DestroyObject(obj);
// Make sure we're at quota by posting a callback to the threadpool.
ThreadPool.QueueUserWorkItem(new WaitCallback(PoolCreateRequest));
}
}
else
{
// If we're shutting down, we destroy the object.
DestroyObject(obj);
}
}