// this chains some try/finally blocks to
// - complete and dispose the scoped filesystems
// - deal with events if appropriate
// - remove the scope context if it belongs to this scope
// - deal with detachable scopes
// here,
// - completed indicates whether the scope has been completed
// can be true or false, but in both cases the scope is exiting
// in a normal way
// - onException indicates whether completing/aborting the database
// transaction threw an exception, in which case 'completed' has
// to be false + events don't trigger and we just to some cleanup
// to ensure we don't leave a scope around, etc
private void RobustExit(bool completed, bool onException)
{
if (onException)
{
completed = false;
}
TryFinally(() =>
{
if (_scopeFileSystem == true)
{
if (completed)
{
_fscope.Complete();
}
_fscope.Dispose();
_fscope = null;
}
}, () =>
{
// deal with events
if (onException == false && _eventDispatcher != null)
{
_eventDispatcher.ScopeExit(completed);
}
}, () =>
{
// if *we* created it, then get rid of it
if (_scopeProvider.AmbientContext == _scopeContext)
{
try
{
_scopeProvider.AmbientContext.ScopeExit(completed);
}
finally
{
// removes the ambient context (ambient scope already gone)
_scopeProvider.SetAmbient(null);
}
}
}, () =>
{
if (Detachable)
{
// get out of the way, restore original
_scopeProvider.SetAmbient(OrigScope, OrigContext);
Attached = false;
OrigScope = null;
OrigContext = null;
}
});
}
public void Dispose()
{
EnsureNotDisposed();
if (this != _scopeProvider.AmbientScope)
{
throw new InvalidOperationException("Not the ambient scope.");
}
#if DEBUG_SCOPES
_scopeProvider.Disposed(this);
#endif
if (_database != null)
{
_database.Dispose();
}
_scopeProvider.SetAmbient(null);
_disposed = true;
GC.SuppressFinalize(this);
}