public DeviceService(IConnectableObservable <IDeviceView> source)
{
_disposable.Add(source
.GroupBy(x => x.DeviceId)
.Subscribe(deviceStream => {
_disposable.Add(deviceStream
.Scan(DeviceUpdateEvent.GetInitialView(deviceStream.Key), DeviceUtils.Update)
.Subscribe(GetCreateSubject(deviceStream.Key)));
}));
_disposable.Add(source.Connect());
}
BehaviorSubject <DeviceUpdateEvent> GetCreateSubject(Guid deviceId)
{
return(_streams.GetOrAdd(deviceId, Create).Value);
Lazy <BehaviorSubject <DeviceUpdateEvent> > Create(Guid id)
{
return(new Lazy <BehaviorSubject <DeviceUpdateEvent> >(() => {
var subject = new BehaviorSubject <DeviceUpdateEvent>(DeviceUpdateEvent.GetInitialView(deviceId));
_disposable.Add(subject);
return subject;
}));
}
}