public static Step BeginReadBackward(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
string streamId,
int fromEventNumber,
int maxCount,
bool resolveLinks,
IPrincipal principal,
Action <ClientMessage.ReadStreamEventsBackwardCompleted> handler)
{
return
(steps =>
cancellationScope.Register(
ioDispatcher.ReadBackward(
streamId,
fromEventNumber,
maxCount,
resolveLinks,
principal,
response =>
{
if (cancellationScope.Cancelled(response.CorrelationId))
{
return;
}
handler(response);
Run(steps);
})));
}
private static void UpdateStreamAclWithRetry(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
string streamId,
long expectedVersion,
ClaimsPrincipal principal,
StreamMetadata metadata,
Action <ClientMessage.WriteEventsCompleted> handler,
IEnumerator <Step> steps)
{
PerformWithRetry(
ioDispatcher,
handler,
steps,
expectedVersion == ExpectedVersion.Any,
TimeSpan.FromMilliseconds(100),
action =>
cancellationScope.Register(
ioDispatcher.WriteEvents(
SystemStreams.MetastreamOf(streamId),
expectedVersion,
new[] {
new Event(Guid.NewGuid(), SystemEventTypes.StreamMetadata, true, metadata.ToJsonBytes(),
null)
},
principal,
response => {
if (cancellationScope.Cancelled(response.CorrelationId))
{
return;
}
action(response, response.Result);
})));
}
private static void DeleteStreamWithRetry(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
string streamId,
int expectedVersion,
bool hardDelete,
IPrincipal principal,
Action <ClientMessage.DeleteStreamCompleted> handler,
IEnumerator <Step> steps)
{
PerformWithRetry(
ioDispatcher,
handler,
steps,
expectedVersion == ExpectedVersion.Any,
TimeSpan.FromMilliseconds(100),
action =>
cancellationScope.Register(
ioDispatcher.DeleteStream(
streamId,
expectedVersion,
hardDelete,
principal,
response =>
{
if (cancellationScope.Cancelled(response.CorrelationId))
{
return;
}
action(response, response.Result);
})));
}
private static void WriteEventsWithRetry(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
string streamId,
long expectedVersion,
ClaimsPrincipal principal,
Event[] events,
Action <ClientMessage.WriteEventsCompleted> handler,
IEnumerator <Step> steps)
{
PerformWithRetry(
ioDispatcher,
handler,
steps,
expectedVersion == ExpectedVersion.Any,
TimeSpan.FromMilliseconds(100),
action =>
cancellationScope.Register(
ioDispatcher.WriteEvents(
streamId,
expectedVersion,
events,
principal,
response => {
if (cancellationScope.Cancelled(response.CorrelationId))
{
return;
}
action(response, response.Result);
})));
}
public static Step BeginReadForward(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
string streamId,
long fromEventNumber,
int maxCount,
bool resolveLinks,
IPrincipal principal,
Action <ClientMessage.ReadStreamEventsForwardCompleted> handler,
Action timeoutHandler)
{
return
(steps =>
{
var corrId = Guid.NewGuid();
cancellationScope.Register(corrId);
ioDispatcher.ReadForward(
streamId,
fromEventNumber,
maxCount,
resolveLinks,
principal,
response =>
{
if (cancellationScope.Cancelled(response.CorrelationId))
{
return;
}
handler(response);
Run(steps);
},
() =>
{
if (cancellationScope.Cancelled(corrId))
{
return;
}
timeoutHandler();
Run(steps);
},
corrId);
});
}
public void CancelledScopeShouldBehaveAsSpec()
{
CancellationToken ct;
using (var cts = CancellationScope.Cancelled())
{
ct = cts.Token;
AssertState(ct, canBeCancelled: true, isCancellationRequested: true);
}
AssertState(ct, canBeCancelled: true, isCancellationRequested: true);
}
public static Step BeginDelay(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
TimeSpan timeout,
Action handler)
{
return(steps => ioDispatcher.Delay(
timeout,
() => {
if (cancellationScope.Cancelled(Guid.Empty))
{
return;
}
handler();
Run(steps);
}));
}
public static Step BeginSubscribeAwake(
this IODispatcher ioDispatcher,
CancellationScope cancellationScope,
string streamId,
TFPos from,
Action <IODispatcherDelayedMessage> handler,
Guid?correlationId = null)
{
return(steps => ioDispatcher.SubscribeAwake(
streamId,
@from,
message => {
if (cancellationScope.Cancelled(message.CorrelationId))
{
return;
}
handler(message);
Run(steps);
},
correlationId));
}
