public Option <T> PreProcessMessageContent(object message)
{
if (message == null)
{
tell(sys.DeadLetters, DeadLetter.create(Sender, Self, $"Message is null for tell (expected {typeof(T)})", message));
return(None);
}
if (typeof(T) != typeof(string) && message is string)
{
try
{
// This allows for messages to arrive from JS and be dealt with at the endpoint
// (where the type is known) rather than the gateway (where it isn't)
return(Some(Deserialise.Object <T>((string)message)));
}
catch
{
tell(sys.DeadLetters, DeadLetter.create(Sender, Self, $"Invalid message type for tell (expected {typeof(T)})", message));
return(None);
}
}
if (!(message is T))
{
tell(sys.DeadLetters, DeadLetter.create(Sender, Self, $"Invalid message type for tell (expected {typeof(T)})", message));
return(None);
}
return(Some((T)message));
}
InboxDirective RunMessageDirective(
ProcessId pid,
ProcessId sender,
StrategyDecision decision,
Exception e,
object message
)
{
var directive = decision.MessageDirective;
switch (directive.Type)
{
case MessageDirectiveType.ForwardToParent:
tell(pid.Parent, message, sender);
return(InboxDirective.Default);
case MessageDirectiveType.ForwardToSelf:
tell(pid, message, sender);
return(InboxDirective.Default);
case MessageDirectiveType.ForwardToProcess:
tell((directive as ForwardToProcess).ProcessId, message, sender);
return(InboxDirective.Default);
case MessageDirectiveType.StayInQueue:
return(InboxDirective.PushToFrontOfQueue);
default:
if (!(e is ProcessKillException))
{
tell(sys.DeadLetters, DeadLetter.create(sender, pid, e, "Process error: ", message));
}
return(InboxDirective.Default);
}
}
public static Option <UserControlMessage> PreProcessMessage <T>(ProcessId sender, ProcessId self, object message)
{
if (message == null)
{
var emsg = $"Message is null for tell (expected {typeof(T)})";
tell(ActorContext.System(self).DeadLetters, DeadLetter.create(sender, self, emsg, message));
return(None);
}
if (message is ActorRequest req)
{
if (!(req.Message is T) && !(req.Message is Message))
{
var emsg = $"Invalid message type for ask (expected {typeof(T)})";
tell(ActorContext.System(self).DeadLetters, DeadLetter.create(sender, self, emsg, message));
ActorContext.System(self).Tell(
sender,
new ActorResponse(new Exception($"Invalid message type for ask (expected {typeof(T)})"),
sender,
self,
req.RequestId,
typeof(Exception).AssemblyQualifiedName,
true
),
self
);
return(None);
}
return(Optional((UserControlMessage)message));
}
return(new UserMessage(message, sender, sender));
}
/// <summary>
/// Forward the current message to dead-letters (and wrap it in a contextual dead-letter
/// structre)
/// </summary>
/// <param name="ex">Exception that caused the dead-letter</param>
public static Unit dead(Exception ex, SystemName system = default(SystemName)) =>
tell(
ActorContext.System(system).DeadLetters,
DeadLetter.create(
Sender,
Self,
ex,
ActorContext.Request.CurrentMsg
));
/// <summary>
/// Forward the current message to dead-letters (and wrap it in a contextual dead-letter
/// structre)
/// </summary>
/// <param name="reason">Reason for the dead-letter</param>
public static Unit dead(string reason, SystemName system = default(SystemName)) =>
tell(
ActorContext.System(system).DeadLetters,
DeadLetter.create(
Sender,
Self,
reason,
ActorContext.Request.CurrentMsg
));
/// <summary>
/// Forward a message to dead-letters (and wrap it in a contextual dead-letter
/// structre)
/// </summary>
/// <param name="message">Dead letter message</param>
/// <param name="ex">Exception that caused the dead-letter</param>
public static Unit dead(object message, Exception ex, SystemName system = default(SystemName)) =>
tell(
ActorContext.System(system).DeadLetters,
DeadLetter.create(
Sender,
Self,
ex,
message
));
/// <summary>
/// Forward a message to dead-letters (and wrap it in a contextual dead-letter
/// structre)
/// </summary>
/// <param name="message">Dead letter message</param>
/// <param name="reason">Reason for the dead-letter</param>
public static Unit dead(object message, string reason, SystemName system = default(SystemName)) =>
tell(
ActorContext.System(system).DeadLetters,
DeadLetter.create(
Sender,
Self,
reason,
message
));
void CheckRemoteInbox(string key, bool pausable)
{
var inbox = this;
var count = cluster?.QueueLength(key) ?? 0;
while (count > 0 && (!pausable || !IsPaused))
{
var directive = InboxDirective.Default;
ActorInboxCommon.GetNextMessage(cluster, actor.Id, key).IfSome(
x => iter(x, (dto, msg) =>
{
try
{
switch (msg.MessageType)
{
case Message.Type.User: directive = ActorInboxCommon.UserMessageInbox(actor, inbox, (UserControlMessage)msg, parent); break;
case Message.Type.UserControl: directive = ActorInboxCommon.UserMessageInbox(actor, inbox, (UserControlMessage)msg, parent); break;
}
}
catch (Exception e)
{
var session = msg.SessionId == null
? None
: Some(new SessionId(msg.SessionId));
ActorContext.System(actor.Id).WithContext(new ActorItem(actor, inbox, actor.Flags), parent, dto.Sender, msg as ActorRequest, msg, session, () => replyErrorIfAsked(e));
tell(ActorContext.System(actor.Id).DeadLetters, DeadLetter.create(dto.Sender, actor.Id, e, "Remote message inbox.", msg));
logSysErr(e);
}
finally
{
if ((directive & InboxDirective.Pause) != 0)
{
IsPaused = true;
directive = directive & (~InboxDirective.Pause);
}
if (directive == InboxDirective.Default)
{
cluster?.Dequeue <RemoteMessageDTO>(key);
}
}
}));
if (directive == InboxDirective.Default)
{
count--;
}
}
}
public static Option <UserControlMessage> PreProcessMessage <T>(ProcessId sender, ProcessId self, object message, Option <SessionId> sessionId)
{
if (message == null)
{
var emsg = $"Message is null for tell (expected {typeof(T)})";
tell(ActorContext.System(self).DeadLetters, DeadLetter.create(sender, self, emsg, message));
return(None);
}
UserControlMessage rmsg = null;
if (message is ActorRequest req)
{
if (!(req.Message is T) && !(req.Message is Message))
{
var emsg = $"Invalid message type for ask (expected {typeof(T)})";
tell(ActorContext.System(self).DeadLetters, DeadLetter.create(sender, self, emsg, message));
ActorContext.System(self).Tell(
sender,
new ActorResponse(new Exception($"Invalid message type for ask (expected {typeof(T)})"),
sender,
self,
req.RequestId,
typeof(Exception).AssemblyQualifiedName,
true
),
Schedule.Immediate,
self
);
return(None);
}
rmsg = message as UserControlMessage;
}
else
{
rmsg = new UserMessage(message, sender, sender);
}
if (rmsg != null && rmsg.SessionId == null && sessionId.IsSome)
{
rmsg.SessionId = sessionId.Map(x => x.Value).IfNoneUnsafe((string)null);
}
return(Optional(rmsg));
}
public static Option <Tuple <RemoteMessageDTO, Message> > GetNextMessage(ICluster cluster, ProcessId self, string key)
{
if (cluster == null)
{
return(None);
}
Message msg = null;
RemoteMessageDTO dto = null;
dto = null;
do
{
dto = cluster.Peek <RemoteMessageDTO>(key);
if (dto == null)
{
// Queue is empty
return(None);
}
if (dto.Tag == 0 && dto.Type == 0)
{
// Message is bad
cluster.Dequeue <RemoteMessageDTO>(key);
tell(ActorContext.System(self).DeadLetters, DeadLetter.create(dto.Sender, self, null, "Failed to deserialise message: ", dto));
if (cluster.QueueLength(key) == 0)
{
return(None);
}
}
}while (dto == null || dto.Tag == 0 || dto.Type == 0);
try
{
msg = MessageSerialiser.DeserialiseMsg(dto, self);
msg.SessionId = dto.SessionId;
}
catch (Exception e)
{
// Message can't be deserialised
cluster.Dequeue <RemoteMessageDTO>(key);
tell(ActorContext.System(self).DeadLetters, DeadLetter.create(dto.Sender, self, e, "Failed to deserialise message: ", msg));
return(None);
}
return(Some(Tuple(dto, msg)));
}
/// <summary>
/// TODO: This is a combination of code in ActorCommon.GetNextMessage and
/// CheckRemoteInbox. Some factoring is needed.
/// </summary>
void SysInbox(RemoteMessageDTO dto)
{
try
{
if (dto == null)
{
// Failed to deserialise properly
return;
}
if (dto.Tag == 0 && dto.Type == 0)
{
// Message is bad
tell(ActorContext.System(actor.Id).DeadLetters, DeadLetter.create(dto.Sender, actor.Id, null, "Failed to deserialise message: ", dto));
return;
}
var msg = MessageSerialiser.DeserialiseMsg(dto, actor.Id);
try
{
lock (sync)
{
ActorInboxCommon.SystemMessageInbox(actor, this, (SystemMessage)msg, parent);
}
}
catch (Exception e)
{
var session = msg.SessionId == null
? None
: Some(new SessionId(msg.SessionId));
ActorContext.System(actor.Id).WithContext(new ActorItem(actor, this, actor.Flags), parent, dto.Sender, msg as ActorRequest, msg, session, () => replyErrorIfAsked(e));
tell(ActorContext.System(actor.Id).DeadLetters, DeadLetter.create(dto.Sender, actor.Id, e, "Remote message inbox.", msg));
logSysErr(e);
}
}
catch (Exception e)
{
logSysErr(e);
}
}