public HostedClient(
IRuntimeClient runtimeClient,
ClientObserverRegistrar clientObserverRegistrar,
ILocalSiloDetails siloDetails,
ILogger <HostedClient> logger,
IGrainReferenceRuntime grainReferenceRuntime,
IInternalGrainFactory grainFactory,
InvokableObjectManager invokableObjectManager,
MessageCenter messageCenter,
MessagingTrace messagingTrace)
{
this.incomingMessages = Channel.CreateUnbounded <Message>(new UnboundedChannelOptions
{
SingleReader = true,
SingleWriter = false,
AllowSynchronousContinuations = false,
});
this.runtimeClient = runtimeClient;
this.clientObserverRegistrar = clientObserverRegistrar;
this.grainReferenceRuntime = grainReferenceRuntime;
this.grainFactory = grainFactory;
this.invokableObjects = invokableObjectManager;
this.siloMessageCenter = messageCenter;
this.messagingTrace = messagingTrace;
this.logger = logger;
this.ClientId = ClientGrainId.Create($"hosted-{messageCenter.MyAddress.ToParsableString()}");
this.ClientAddress = ActivationAddress.NewActivationAddress(siloDetails.SiloAddress, this.ClientId.GrainId);
}
/// <inheritdoc />
public bool TryDispatchToClient(Message message)
{
if (!ClientGrainId.TryParse(message.TargetGrain, out var targetClient) || !this.ClientId.Equals(targetClient))
{
return(false);
}
if (message.IsExpired)
{
this.messagingTrace.OnDropExpiredMessage(message, MessagingStatisticsGroup.Phase.Receive);
return(true);
}
if (message.Direction == Message.Directions.Response)
{
// Requests are made through the runtime client, so deliver responses to the rutnime client so that the request callback can be executed.
this.runtimeClient.ReceiveResponse(message);
}
else
{
// Requests agrainst client objects are scheduled for execution on the client.
this.incomingMessages.Writer.TryWrite(message);
}
return(true);
}
internal void ClientDropped(ClientGrainId clientId)
{
var addr = GetClientActivationAddress(clientId);
scheduler.QueueTask(
() => ExecuteWithRetries(() => grainDirectory.UnregisterAsync(addr, Orleans.GrainDirectory.UnregistrationCause.Force), ErrorCode.ClientRegistrarFailedToUnregister, String.Format("Directory.UnRegisterAsync {0} failed.", addr)),
this).Ignore();
}
internal void ClientAdded(ClientGrainId clientId)
{
// Use a ActivationId that is hashed from clientId, and not random ActivationId.
// That way, when we refresh it in the directiry, it's the same one.
var addr = GetClientActivationAddress(clientId);
scheduler.QueueTask(
() => ExecuteWithRetries(() => grainDirectory.RegisterAsync(addr, singleActivation: false), ErrorCode.ClientRegistrarFailedToRegister, String.Format("Directory.RegisterAsync {0} failed.", addr)),
this).Ignore();
}
private ActivationAddress GetClientActivationAddress(ClientGrainId clientId)
{
// Need to pick a unique deterministic ActivationId for this client.
// We store it in the grain directory and there for every GrainId we use ActivationId as a key
// so every GW needs to behave as a different "activation" with a different ActivationId (its not enough that they have different SiloAddress)
string stringToHash = clientId.ToString() + myAddress.Endpoint + myAddress.Generation.ToString(System.Globalization.CultureInfo.InvariantCulture);
Guid hash = Utils.CalculateGuidHash(stringToHash);
var activationId = ActivationId.GetActivationId(UniqueKey.NewKey(hash));
return(ActivationAddress.GetAddress(myAddress, clientId.GrainId, activationId));
}
/// <summary>
/// Returns the <see cref="ClientGrainId"/> associated with this instance.
/// </summary>
public ClientGrainId GetClientId()
{
if (!ClientGrainId.TryParse(this.GrainId, out var result))
{