public async void Dispatch()
{
Outcome <TResult, Exception> outcome;
if (realProxy.proxyName != null)
{
CallLogging.LogStart(realProxy.proxyName, method.Name, args);
}
object obj;
try
{
obj = method.Invoke(realProxy.target, args);
}
catch (TargetInvocationException e)
{
outcome = new Outcome <TResult, Exception>(e.InnerException);
goto Finish;
}
Task <TResult> task = obj as Task <TResult>;
if (task == null)
{
// Can only happen when we chose TResult == Void2 for a method
// that actually returns plain Task.
// The more obvious task = ((Task)obj).ContinueWith(_ => default(TResult))
// executes outside the synchronization context and posts a continuation
// back to the synchronization context, which calls Send, which trips my
// assertion in the P# scheduler. The P# task handling needs to change
// anyway, but it's fine to keep this version.
task = ((Func <Task <TResult> >)(async() =>
{
await(Task) obj;
return(default(TResult));
}))();
}
// From here to Finish is basically
// "Catching<Exception>.AwaitTaskAsync(task)", but such a method
// would be prone to misuse and this is the only place we need it,
// so inline it here.
TResult result;
try
{
result = await task;
}
catch (Exception ex)
{
outcome = new Outcome <TResult, Exception>(ex);
goto Finish;
}
outcome = new Outcome <TResult, Exception>(result);
Finish:
if (realProxy.proxyName != null)
{
CallLogging.LogEnd(realProxy.proxyName, method.Name, outcome, args);
}
replyTarget.SetOutcome(outcome);
}
public IDisposable Subscribe(IConfigurationSubscriber <TConfig> subscriber, out TConfig currentConfig)
{
int subscriptionNum = subscriptionCount++;
var subscriberProxy = new SubscriberLoggingProxy(subscriber, string.Format("{0} subscriber {1}", proxyName, subscriptionNum));
CallLogging.LogStart(proxyName, nameof(Subscribe), subscriberProxy);
// Some mess because of "out" parameter. Does the convenience of
// "out" parameters in the common case merit the mess here?
var t = LogOutcome(() => {
TConfig currentConfig1;
var subscriptionProxy1 = new SubscriptionLoggingProxy(
original.Subscribe(subscriberProxy, out currentConfig1),
string.Format("{0} subscription {1}", proxyName, subscriptionNum));
return(Tuple.Create(currentConfig1, subscriptionProxy1));
}, (outcome) => CallLogging.LogEnd(proxyName, nameof(Subscribe), outcome, subscriberProxy));
currentConfig = t.Item1;
return(t.Item2);
}
public void Dispose()
{
CallLogging.LogStart(proxyName, nameof(Dispose));
LogOutcome(() => original.Dispose(),
(outcome) => CallLogging.LogEnd(proxyName, nameof(Dispose), outcome));
}
public Task ApplyConfigurationAsync(TConfig newConfig)
{
CallLogging.LogStart(proxyName, nameof(ApplyConfigurationAsync), newConfig);
return(LogOutcomeAsync(() => original.ApplyConfigurationAsync(newConfig),
(outcome) => CallLogging.LogEnd(proxyName, nameof(ApplyConfigurationAsync), outcome, newConfig)));
}