/// <summary>
/// Used to get the event out of the node.
/// </summary>
/// <param name="actionNode">The action node to process.</param>
/// <returns></returns>
public bool Next(out EventActionNodePersist <TKey, TState, TEvent, TParam, TCtx, TUserId> actionNode)
{
if (Interlocked.CompareExchange(
ref this.currentRunningState,
RUNNING,
IDLE) == IDLE)
{
if (this.skipQueue.Next(out actionNode))
{
this.currentEventNode = actionNode;
return(true);
}
Volatile.Write(ref this.currentRunningState, IDLE);
return(false);
}
else if (Interlocked.CompareExchange(
ref this.currentRunningState,
RUNNING,
RETRY) == RETRY)
{
actionNode = this.retryEvent;
this.currentEventNode = this.retryEvent;
this.retryEvent = null;
return(true);
}
actionNode = null;
return(false);
}
/// <summary>
/// Called when you are done with the event.
/// </summary>
/// <returns>The task that performs the update.</returns>
public async Task DoneWithEvent()
{
while (true)
{
try
{
if (this.currentEventNode == null)
{
log.Warn($"The current event node is null. This should never happen.");
}
else
{
if (!this.currentEventNode.RunOnThread)
{
await this.eventPersistedStore.SaveResult(
this.currentEventNode.Id,
EventResultType.Completed);
}
this.currentEventNode = null;
}
Volatile.Write(ref this.currentRunningState, IDLE);
break;
}
catch (Exception ex)
{
log.Error(ex, ex.Message);
Thread.Sleep(5);
}
}
}
public void RetryEvent(
EventActionNodePersist <TKey, TState, TEvent, TParam, TCtx, TUserId> eventActionNodePersist)
{
Interlocked.Increment(ref this.retryCount);
Volatile.Write(ref this.retryEvent, eventActionNodePersist);
this.currentEventNode = null;
// TODO add a delay. Will need to use either a retry data structure or just use a timer but there is a limit to the amount of timers.
this.retryService.Retry(new TimeSpan(0, 0, this.CalculateDelay()), () => { this.newEventSubject.Next(); });
}
public bool Skip(EventActionNodePersist <TKey, TState, TEvent, TParam, TCtx, TUserId> actionNode)
{
var added = this.skipQueue.AddDefer(actionNode);
// Need to do this here since skip is a special event.
Volatile.Write(ref this.currentRunningState, IDLE);
if (!added)
{
this.eventPersistedStore.SaveResult(actionNode.Id, EventResultType.Full);
log.Warn($"Skip queue is full. State machine id {actionNode.StateMachineKey} {actionNode.Id}");
}
return(added);
}
public async Task <bool> Add(EventActionNodePersist <TKey, TState, TEvent, TParam, TCtx, TUserId> actionNode)
{
try
{
if (actionNode.RunOnThread)
{
var result = this.skipQueue.Add(actionNode);
await this.newEventReceived.NewEvent((TCtx)this);
return(result);
}
else
{
await this.eventPersistedStore.Save(actionNode);
var able = this.skipQueue.Add(actionNode);
if (able)
{
await this.newEventReceived.NewEvent((TCtx)this);
return(true);
}
else
{
await this.eventPersistedStore.SaveResult(actionNode.Id, EventResultType.Full);
return(false);
}
}
}
catch (Exception ex)
{
log.Error(ex, ex.Message);
// TODO Come up with a retry idea but ordering is important so this could be difficult.
return(false);
}
}