public virtual async Task <InvocationState> Enqueue(string job, string source, Dictionary <string, string> payload, TimeSpan invisibleFor, string jobInstanceName, bool unlessAlreadyRunning)
{
var invisibleUntil = _clock.UtcNow + invisibleFor;
string payloadString = null;
if (payload != null)
{
payloadString = InvocationPayloadSerializer.Serialize(payload);
}
var row = await ConnectAndExec(
"work.EnqueueInvocation",
new
{
Job = job,
Source = source,
Payload = payloadString,
NextVisibleAt = invisibleUntil.UtcDateTime,
InstanceName = InstanceName,
JobInstanceName = jobInstanceName ?? job, // Can consider changing the stored procedures to not accept NULL
UnlessAlreadyRunning = unlessAlreadyRunning
});
if (row == null)
{
return(null);
}
return(new InvocationState(row));
}
internal static InvocationState CreateInvocation(Guid id, string job, string source, Dictionary <string, string> payload, bool isContinuation)
{
return(new InvocationState(
new InvocationState.InvocationRow()
{
Version = 0,
Id = id,
Job = job,
Source = source,
Payload = payload == null ? null : InvocationPayloadSerializer.Serialize(payload),
Status = (int)InvocationStatus.Queued,
Result = (int)ExecutionResult.Incomplete,
IsContinuation = isContinuation
}));
}
public virtual async Task <bool> Suspend(InvocationState invocation, Dictionary <string, string> newPayload, TimeSpan suspendFor, string logUrl)
{
var suspendUntil = _clock.UtcNow + suspendFor;
var serializedPayload = InvocationPayloadSerializer.Serialize(newPayload);
var newVersion = await ConnectAndExec(
"work.SuspendInvocation",
new
{
Id = invocation.Id,
Version = invocation.CurrentVersion,
Payload = serializedPayload,
SuspendUntil = suspendUntil.UtcDateTime,
LogUrl = logUrl,
InstanceName = InstanceName
});
return(ProcessResult(invocation, newVersion));
}
internal void Update(InvocationRow newVersion)
{
// Cast here so that failures occur during the update.
Status = (InvocationStatus)newVersion.Status;
Result = (ExecutionResult)newVersion.Result;
// Set up dates
LastDequeuedAt = LoadUtcDateTime(newVersion.LastDequeuedAt);
LastSuspendedAt = LoadUtcDateTime(newVersion.LastSuspendedAt);
CompletedAt = LoadUtcDateTime(newVersion.CompletedAt);
QueuedAt = new DateTimeOffset(newVersion.QueuedAt, TimeSpan.Zero);
NextVisibleAt = new DateTimeOffset(newVersion.NextVisibleAt, TimeSpan.Zero);
UpdatedAt = new DateTimeOffset(newVersion.UpdatedAt, TimeSpan.Zero);
if (String.IsNullOrEmpty(newVersion.Payload))
{
Payload = new Dictionary <string, string>();
}
else if (CurrentRow == null || !String.Equals(CurrentRow.Payload, newVersion.Payload, StringComparison.Ordinal))
{
Payload = InvocationPayloadSerializer.Deserialize(newVersion.Payload);
}
CurrentRow = newVersion;
}
protected internal virtual async Task Dispatch(InvocationState invocation, InvocationLogCapture capture, CancellationToken cancelToken, bool includeContinuations)
{
InvocationContext.SetCurrentInvocationId(invocation.Id);
if (invocation.IsContinuation)
{
InvocationEventSource.Log.Resumed();
}
else
{
InvocationEventSource.Log.Started();
}
// Record that we are executing the job
if (!await Queue.UpdateStatus(invocation, InvocationStatus.Executing, ExecutionResult.Incomplete))
{
InvocationEventSource.Log.Aborted(invocation);
return;
}
// Create the request.Invocation context and start capturing the logs
await capture.Start();
var context = new InvocationContext(invocation, Queue, cancelToken, capture);
InvocationResult result = null;
try
{
result = await Dispatcher.Dispatch(context);
// TODO: If response.Continuation != null, enqueue continuation
switch (result.Result)
{
case ExecutionResult.Completed:
InvocationEventSource.Log.Succeeded(result);
break;
case ExecutionResult.Faulted:
InvocationEventSource.Log.Faulted(result);
break;
case ExecutionResult.Incomplete:
InvocationEventSource.Log.Suspended(result);
break;
default:
InvocationEventSource.Log.UnknownStatus(result);
break;
}
if (invocation.NextVisibleAt < Clock.UtcNow)
{
InvocationEventSource.Log.InvocationTookTooLong(invocation);
}
}
catch (Exception ex)
{
InvocationEventSource.Log.DispatchError(ex);
result = new InvocationResult(ExecutionResult.Crashed, ex);
}
// Stop capturing and set the log url
string logUrl = null;
if (capture != null)
{
var logUri = await capture.End();
if (logUri != null)
{
logUrl = logUri.AbsoluteUri;
}
}
if (result.Result != ExecutionResult.Incomplete)
{
// If we're not suspended, the invocation has completed
InvocationEventSource.Log.Ended();
await Queue.Complete(invocation, result.Result, result.Exception == null?null : result.Exception.ToString(), logUrl);
// If we've completed and there's a repeat, queue the repeat
if (result.RescheduleIn != null)
{
// Rescheule it to run again
var repeat = await EnqueueRepeat(invocation, result);
InvocationEventSource.Log.ScheduledRepeat(invocation, repeat, result.RescheduleIn.Value);
}
}
else
{
if (includeContinuations)
{
invocation.Update(new InvocationState.InvocationRow()
{
Id = Guid.NewGuid(),
Version = invocation.CurrentVersion + 1,
Job = invocation.Job,
Source = invocation.Id.ToString("N"),
Status = (int)InvocationStatus.Suspended,
Result = (int)ExecutionResult.Incomplete,
LastDequeuedAt = invocation.LastDequeuedAt == null ? (DateTime?)null : invocation.LastDequeuedAt.Value.UtcDateTime,
LastSuspendedAt = DateTime.UtcNow,
CompletedAt = null,
QueuedAt = invocation.QueuedAt.UtcDateTime,
NextVisibleAt = invocation.NextVisibleAt.UtcDateTime + DefaultInvisibilityPeriod,
UpdatedAt = invocation.UpdatedAt.UtcDateTime,
Payload = InvocationPayloadSerializer.Serialize(result.Continuation.Parameters),
IsContinuation = true
});
// Run the continuation inline after waiting
await Task.Delay(result.Continuation.WaitPeriod);
await Dispatch(invocation, capture, cancelToken, includeContinuations);
}
else
{
// Suspend the job until the continuation is ready to run
await Queue.Suspend(invocation, result.Continuation.Parameters, result.Continuation.WaitPeriod, logUrl);
}
}
}
public void SimpleDeserialization(Dictionary <string, string> expectedPayload, string json)
{
var deserialized = InvocationPayloadSerializer.Deserialize(json);
Assert.True(expectedPayload.SequenceEqual(deserialized));
}
public void SimpleSerialization(Dictionary <string, string> payload, string expectedJson)
{
Assert.Equal(expectedJson, InvocationPayloadSerializer.Serialize(payload));
}