/// <summary>
/// Creates a new connection to replace an existing connection
/// </summary>
/// <param name="owningObject">Outer connection that currently owns <paramref name="oldConnection"/></param>
/// <param name="userOptions">Options used to create the new connection</param>
/// <param name="oldConnection">Inner connection that will be replaced</param>
/// <returns>A new inner connection that is attached to the <paramref name="owningObject"/></returns>
internal DbConnectionInternal ReplaceConnection(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
{
DbConnectionInternal newConnection = UserCreateRequest(owningObject, userOptions, oldConnection);
if (newConnection != null)
{
PrepareConnection(owningObject, newConnection);
oldConnection.PrepareForReplaceConnection();
oldConnection.DeactivateConnection();
oldConnection.Dispose();
}
return(newConnection);
}
private void DeactivateObject(DbConnectionInternal obj)
{
obj.DeactivateConnection();
bool returnToGeneralPool = false;
bool destroyObject = false;
if (obj.IsConnectionDoomed)
{
// the object is not fit for reuse -- just dispose of it.
destroyObject = true;
}
else
{
// NOTE: constructor should ensure that current state cannot be State.Initializing, so it can only
// be State.Running or State.ShuttingDown
Debug.Assert(_state == State.Running || _state == State.ShuttingDown);
lock (obj)
{
// A connection with a delegated transaction cannot currently
// be returned to a different customer until the transaction
// actually completes, so we send it into Stasis -- the SysTx
// transaction object will ensure that it is owned (not lost),
// and it will be certain to put it back into the pool.
if (_state == State.ShuttingDown)
{
// connection is being closed and the pool has been marked as shutting
// down, so destroy this object.
destroyObject = true;
}
else
{
if (obj.CanBePooled)
{
// We must put this connection into the transacted pool
// while inside a lock to prevent a race condition with
// the transaction asyncronously completing on a second
// thread.
// return to general pool
returnToGeneralPool = true;
}
else
{
// object is not fit for reuse -- just dispose of it
destroyObject = true;
}
}
}
}
if (returnToGeneralPool)
{
// Only push the connection into the general pool if we didn't
// already push it onto the transacted pool, put it into stasis,
// or want to destroy it.
Debug.Assert(destroyObject == false);
PutNewObject(obj);
}
else if (destroyObject)
{
DestroyObject(obj);
QueuePoolCreateRequest();
}
//-------------------------------------------------------------------------------------
// postcondition
// ensure that the connection was processed
Debug.Assert(
returnToGeneralPool == true || destroyObject == true);
}