public async Task RegisterObserverActorAsync(GatewayRequest request)
{
try
{
// Validates parameter
if (string.IsNullOrWhiteSpace(request?.Topic) ||
(request.ObserverEntityId?.ServiceUri == null) ||
(request.ObserverEntityId.ActorId == null) ||
(request.ObservableEntityId == null))
{
throw new ArgumentException($"Parameter {nameof(request)} is null or invalid.", nameof(request));
}
// Gets actor proxy
IClientObserverActor proxy = GetActorProxy(
new ActorId(request.ObserverEntityId.ActorId),
request.ObserverEntityId.ServiceUri);
if (proxy == null)
{
throw new ApplicationException("The ActorProxy cannot be null.");
}
// Invokes actor using proxy
ServiceEventSource.Current.Message(
$"Registering observer...\r\n[Observable]: {request.ObservableEntityId}\r\n[Observer]: {request.ObserverEntityId}\r\n[Publication]: Topic=[{request.Topic}]");
await proxy.RegisterObserverActorAsync(request.Topic, request.FilterExpressions, new EntityId(request.ObservableEntityId));
}
catch (AggregateException ex)
{
if (!(ex.InnerExceptions?.Count > 0))
{
return;
}
foreach (Exception exception in ex.InnerExceptions)
{
ServiceEventSource.Current.Message(exception.Message);
}
throw new HttpResponseException(this.Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message));
}
catch (Exception ex)
{
ServiceEventSource.Current.Message(ex.Message);
throw new HttpResponseException(this.Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message));
}
}
public async Task <IEnumerable <Message> > ReadMessagesFromMessageBoxAsync(GatewayRequest request)
{
try
{
// Validates parameter
if ((request.ObserverEntityId?.ServiceUri == null) ||
(request.ObserverEntityId.ActorId == null))
{
throw new ArgumentException($"Parameter {nameof(request)} is null or invalid.", nameof(request));
}
// Gets actor proxy
IClientObserverActor proxy = GetActorProxy(
new ActorId(request.ObserverEntityId.ActorId),
request.ObserverEntityId.ServiceUri);
if (proxy == null)
{
throw new ApplicationException("The ActorProxy cannot be null.");
}
// Invokes actor using proxy
ServiceEventSource.Current.Message($"Reading messages from the MessageBox...\r\n[Observer]: {request.ObserverEntityId}");
return(await proxy.ReadMessagesFromMessageBoxAsync());
}
catch (AggregateException ex)
{
if (!(ex.InnerExceptions?.Count > 0))
{
throw new HttpResponseException(this.Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message));
}
foreach (Exception exception in ex.InnerExceptions)
{
ServiceEventSource.Current.Message(exception.Message);
}
throw new HttpResponseException(this.Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message));
}
catch (Exception ex)
{
ServiceEventSource.Current.Message(ex.Message);
throw new HttpResponseException(this.Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message));
}
}
public async Task ClearSubscriptionsAsync(GatewayRequest request)
{
try
{
// Validates parameter
if (request.ObserverEntityId?.ServiceUri == null ||
request.ObserverEntityId.ActorId == null)
{
throw new ArgumentException($"Parameter {nameof(request)} is null or invalid.", nameof(request));
}
// Gets actor proxy
IClientObserverActor proxy = GetActorProxy(new ActorId(request.ObserverEntityId.ActorId),
request.ObserverEntityId.ServiceUri);
if (proxy == null)
{
throw new ApplicationException("The ActorProxy cannot be null.");
}
// Invokes actor using proxy
ServiceEventSource.Current.Message($"Clearing observer subscriptions...\r\n[Observer]: {request.ObserverEntityId}");
await proxy.ClearSubscriptionsAsync();
}
catch (AggregateException ex)
{
if (!(ex.InnerExceptions?.Count > 0))
{
throw;
}
foreach (Exception exception in ex.InnerExceptions)
{
ServiceEventSource.Current.Message(exception.Message);
}
throw;
}
catch (Exception ex)
{
ServiceEventSource.Current.Message(ex.Message);
throw;
}
}
