I did too needed to have AsyncController which I easily changed FilterResolvingActionInvoker to be based on AsyncControllerActionInvoker instead of ControllerActionInvoker.
But there was other problems because of automatic transaction disposal after completion of request. In AsyncController starting thread and the thread that completes the request can be different which throws following exception in Dispose method of TransactionManager class:
A TransactionScope must be disposed on the same thread that it was created.
This exception is suppressed without any logging and really was hard to find out. In this case session remains not-disposed and subsequent sessions will timeout.
So I made dispose method public on ITransactionManager and now in my AsyncController, whenever I need a query to database I wrap it in:
using (_services.TransactionManager) {
.....
}
new TransactionManager :
public interface ITransactionManager : IDependency, IDisposable {
void Demand();
void Cancel();
}
public class TransactionManager : ITransactionManager {
private TransactionScope _scope;
private bool _cancelled;
public TransactionManager() {
Logger = NullLogger.Instance;
}
public ILogger Logger { get; set; }
public void Demand() {
if (_scope == null) {
Logger.Debug("Creating transaction on Demand");
_scope = new TransactionScope(
TransactionScopeOption.Required,
new TransactionOptions {
IsolationLevel = IsolationLevel.ReadCommitted
});
_cancelled = false;
}
}
void ITransactionManager.Cancel() {
Logger.Debug("Transaction cancelled flag set");
_cancelled = true;
}
void IDisposable.Dispose() {
if (_scope != null) {
if (!_cancelled) {
Logger.Debug("Marking transaction as complete");
_scope.Complete();
}
Logger.Debug("Final work for transaction being performed");
try {
_scope.Dispose();
}
catch {
// swallowing the exception
}
Logger.Debug("Transaction disposed");
}
_scope = null;
}
}
Please notice that I have made other small changes to TransactionManager.
