public static async Task <string> RunOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
//Gets the orchestration input
var submission = context.GetInput <Submission>();
submission.InstanceId = context.InstanceId;
//For each content url, starts a new activity to download their contents
var downloadActivityTasks = new List <Task <SubmittedContent> >();
foreach (var submittedContent in submission.Contents)
{
downloadActivityTasks.Add(
context.CallActivityAsync <SubmittedContent>(
"SubmissionApprovalProcess_DownloadFileActivity", submittedContent));
}
//When all download activities completes, recover their contents
await Task.WhenAll(downloadActivityTasks);
foreach (var task in downloadActivityTasks)
{
SubmittedContent downloadSubmittedContent = task.Result;
submission.Contents.First(c => c.Url == downloadSubmittedContent.Url).Content =
downloadSubmittedContent.Content;
}
//Notifies the approver by mail to approve or decline the submission
await context.CallActivityAsync(
"SubmissionApprovalProcess_SubmitForApproval", submission);
//Waits for the approval or declining by the approver, or, if no action is taken in two minutes
//finish the process setting the submission status as ignored
using (var timeoutCts = new CancellationTokenSource())
{
DateTime dueTime = context.CurrentUtcDateTime.AddMinutes(5);
Task durableTimeout = context.CreateTimer(dueTime, timeoutCts.Token);
Task <bool> approval = context.WaitForExternalEvent <bool>("SubmissionApprovalEvent");
if (approval == await Task.WhenAny(approval, durableTimeout))
{
timeoutCts.Cancel();
submission.Status = approval.Result ? "APPROVED" : "DECLINED";
}
else
{
submission.Status = "IGNORED";
}
}
//Set a custom status for this process
context.SetCustomStatus(new { ApprovalStatus = submission.Status });
//Notify the requester of the process completion
await context.CallActivityAsync(
"SubmissionApprovalProcess_NotifyCompletionActivity", submission);
//Return the status of the submission and completes the process
return(submission.Status);
}
public static async Task <SubmittedContent> DownloadFile(
[ActivityTrigger] SubmittedContent submittedContent)
{
submittedContent.Content = await _httpClient.GetStringAsync(submittedContent.Url);
return(submittedContent);
}
