public IDomainModelState PromoteToWriteModel(IDomainModelState model)
{
var proxy = DomainModelStateProxy.Unwrap(model);
if (_currentState != proxy.Model)
{
throw new InvalidOperationException("Attempt to override current state detected.");
}
if (proxy.AcquireReason != AcquireReason.ForCommand)
{
throw new InvalidOperationException("Model acquired for query execution could not be promoted to writable mode.");
}
// TODO: create new state
var nextState = new DomainModelState();
_stateLock.EnterWriteLock();
_nextState = nextState;
return DomainModelStateProxy.Wrap(nextState, AcquireReason.ForCommand);
}
public void ReleaseModel(IDomainModelState model, ReleaseAction releaseAction)
{
var proxy = DomainModelStateProxy.Unwrap(model);
switch (releaseAction)
{
case ReleaseAction.AcceptChanges:
if (_nextState != proxy.Model)
{
throw new InvalidOperationException("Attempt to override current state detected.");
}
_currentState = _nextState;
_nextState = null;
_stateLock.ExitWriteLock();
break;
case ReleaseAction.DiscardChanges:
break;
default:
throw new ArgumentException(
string.Format("Invalid release action '{0}' specified.", releaseAction), "releaseAction");
}
proxy.Detach();
_stateLock.ExitReadLock();
}
public DomainModelStateManager(DomainModelState initialState)
{
_currentState = initialState;
}
