/// <summary>
/// Triggers the start of the state-machine
/// </summary>
internal void Start()
{
//if IDLE then STARTING else exit
if (Interlocked.CompareExchange(ref this._lifeCycleState, LifeCycleStateStarting, LifeCycleStateIdle) == LifeCycleStateIdle)
{
this._inboxSubject = this.NewInbox();
this._inbox = this._owner.SubPool.SubscribeInbox(this._inboxSubject + ".*", this);
this._watchdogCts = new CancellationTokenSource();
this._watchdogThread = new Thread(this.WatchdogWorker);
this._watchdogThread.Start();
this._lifeCycleState = LifeCycleStateRunning;
}
}
/// <summary>
/// Entry-point to register a special INBOX subscription
/// internally used for the request-reply mechanism.
/// </summary>
/// <param name="subject">The subject to subscribe to.</param>
/// <param name="feedback">The reference to the reply message handler.</param>
/// <returns>An instance of <see cref="InboxSubscription"/>.</returns>
internal InboxSubscription SubscribeInbox(
string subject,
IRequestReplayFeedback feedback
)
{
lock (this._sublocker)
{
//creates a new instance of subscription proxy
this._ssid++;
var sub = new InboxSubscription(this, this._ssid, subject, feedback);
//then register it
this._subRegister.Add(this._ssid, sub);
//finally, enqueues the request of subscription to be
//sent to the NATS broker.
this._connmgr.EnqueueSubscriptionOperation(sub.ProtoMessageSub);
return(sub);
}
}