public async Task <BackgroundJobStatus> ActivityBackgroundJobWorker(
[ActivityTrigger] BackgroundJobStatus job,
[SignalR(HubName = SignalRFunctions.HubName)] IAsyncCollector <SignalRMessage> signalr,
ILogger log)
{
var sw = Stopwatch.StartNew();
var progress = job.Progress;
while (progress >= job.Progress)
{
// Use the inject worker (processor) to perform the work
await _worker.Process(job);
// Update stats
job.CompletedTaskCount += 1;
job.ElapsedMiliseconds += sw.ElapsedMilliseconds;
job.Message = job.Progress < 100 ? "Processing" : "Complete";
}
log.LogWarning($"[{job.Id}] Completed {job.CompletedTaskCount} of {job.TaskCount} [{job.Progress}%]");
// Broadcast progress updates to subscribes
await signalr.AddAsync(SignalRFunctions.CreateMessage(job));
sw.Stop();
// Return updated status
return(job);
}
public static SignalRMessage CreateMessage(BackgroundJobStatus payload)
{
var message = new SignalRMessage
{
Target = HubStatusUpdateTarget,
Arguments = new[] { payload }
};
return(message);
}
public async Task <BackgroundJobStatus> BackgroundJobOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context,
ILogger log)
{
// Get input and setup background job
var job = context.GetInput <BackgroundJob>();
// Create a custom status object to track progress
var status = new BackgroundJobStatus {
BatchSize = job.BatchSize,
CreatedAt = job.CreatedAt,
Id = context.InstanceId,
MaxTaskLength = job.MaxTaskLength,
MinTaskLength = job.MinTaskLength,
Name = job.Name,
TaskCount = job.TaskCount
};
if (!context.IsReplaying)
{
log.LogWarning($"[{job.Id}] Starting new background job with {job.TaskCount} tasks");
status.Message = "Initializing...";
}
// The orchestrator cannot do any task related work, in fact any attempt to await in here, other then
// launching an activity will throw an exception
while (status.Progress < 100)
{
status = await context.CallActivityAsync <BackgroundJobStatus>(nameof(ActivityBackgroundJobWorker), status);
context.SetCustomStatus(status);
}
// Clear out the status in the orchestrator because the work is done and will be returned in the output
context.SetCustomStatus(null);
return(status);
}
