public async Task <CheckApprovalResult> BetterHandlingValidateReportLineItem([ActivityTrigger] CheckApprovalRequest checkApprovalRequest)
{
var validator = _expenseValidatorFactory.Create(checkApprovalRequest.ExpenseCategory);
var approved = await validator.IsApproved(checkApprovalRequest.EmployeeId, checkApprovalRequest.Amount);
return(new CheckApprovalResult {
LineItemId = checkApprovalRequest.LineItemId, IsApproved = approved
});
}
public async Task BetterHandlingOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
var report = context.GetInput <ExpenseReport>();
var lineItemTasks = new List <Task <CheckApprovalResult> >();
foreach (var lineItem in report.LineItems)
{
var approvalRequest = new CheckApprovalRequest
{
LineItemId = lineItem.Id,
EmployeeId = report.EmployeeId,
Amount = lineItem.Amount,
ExpenseCategory = lineItem.Category
};
lineItemTasks.Add(context.CallActivityAsync <CheckApprovalResult>(nameof(BetterHandlingValidateReportLineItem), approvalRequest));
}
await Task.WhenAll(lineItemTasks);
foreach (var lineItem in report.LineItems)
{
lineItem.Approved = lineItemTasks.FirstOrDefault(task => task.Result.LineItemId == lineItem.Id)?.Result.IsApproved ?? false;
}
try
{
await context.CallActivityAsync(nameof(SaveReport), report);
}
catch (Exception ex)
{
_logger.LogError(ex, "Failed to save validated report");
}
var retryOptions = new RetryOptions(TimeSpan.FromSeconds(5), 3);
await context.CallActivityWithRetryAsync(nameof(NotifyUserReportFinished), retryOptions, report.EmployeeId);
}
public async Task AdvancedHandlingOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext context)
{
try
{
var report = context.GetInput <ExpenseReport>();
var lineItemTasks = new List <Task <CheckApprovalResult> >();
foreach (var lineItem in report.LineItems)
{
var approvalRequest = new CheckApprovalRequest
{
LineItemId = lineItem.Id,
EmployeeId = report.EmployeeId,
Amount = lineItem.Amount,
ExpenseCategory = lineItem.Category
};
lineItemTasks.Add(context.CallActivityAsync <CheckApprovalResult>(nameof(AdvancedHandlingValidateReportLineItem), approvalRequest));
}
await Task.WhenAll(lineItemTasks);
foreach (var lineItem in report.LineItems)
{
lineItem.Approved = lineItemTasks.FirstOrDefault(task => task.Result.LineItemId == lineItem.Id)?.Result.IsApproved ?? false;
}
await context.CallActivityAsync(nameof(SaveExpenseReport), report);
await context.CallActivityAsync(nameof(SendApprovalRequestNotification), report.Id);
using (var timeoutCts = new CancellationTokenSource())
{
var expiration = context.CurrentUtcDateTime.AddHours(24);
var timeoutTask = context.CreateTimer(expiration, timeoutCts.Token);
var approvedTask = context.WaitForExternalEvent <string>(Constants.Events.Approval);
var resultTask = await Task.WhenAny(timeoutTask, approvedTask);
if (resultTask == timeoutTask)
{
await context.CallActivityAsync(nameof(SendEscalationNotification), report.Id);
}
else
{
await context.CallActivityAsync(nameof(SendReportReceivedResponseNotification), (report.Id, approvedTask.Result));
}
if (!timeoutTask.IsCompleted)
{
// the function wont exit unless this is complete or cancelled
timeoutCts.Cancel();
}
}
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error occurred during orchestration {context.InstanceId}");
// In a real application we'd probably want to send some sort of notification here
}
}
