private async Task ExecuteAsync(RequestSession session)
{
try
{
IOperationResultBuilder <TData, TResult> resultBuilder = _resultBuilder();
await foreach (var response in
_connection.ExecuteAsync(_request, session.Token).ConfigureAwait(false))
{
if (session.Token.IsCancellationRequested)
{
return;
}
_operationStore.Set(_request, resultBuilder.Build(response));
}
}
finally
{
session.Dispose();
}
}
public IDisposable Subscribe(
IObserver <IOperationResult <TResult> > observer)
{
var hasResultInStore = false;
if ((_strategy == ExecutionStrategy.CacheFirst ||
_strategy == ExecutionStrategy.CacheAndNetwork) &&
_operationStore.TryGet(_request, out IOperationResult <TResult>?result))
{
hasResultInStore = true;
observer.OnNext(result);
}
IDisposable session = _operationStore.Watch <TResult>(_request).Subscribe(observer);
if (_strategy != ExecutionStrategy.CacheFirst || !hasResultInStore)
{
var requestSession = new RequestSession();
BeginExecute(requestSession);
return(new ObserverSession(session, requestSession));
}
return(session);
}
public ObserverSession(IDisposable storeSession, RequestSession requestSession)
{
_storeSession = storeSession;
_requestSession = requestSession;
}
private void BeginExecute(RequestSession session) => Task.Run(() => ExecuteAsync(session));
public ObserverSession()
{
RequestSession = new RequestSession();
}