private async Task Poll(HttpContext context, ITaskStore taskStore, ITaskExecutor executor, IDictionary <string, string> taskParameters)
{
var pendingTasks = await taskStore.GetPendingTasksAsync();
var numTasks = pendingTasks.Count;
var numExecuted = 0;
if (pendingTasks.Any())
{
await Virtualize(context, taskParameters);
}
for (var i = 0; i < numTasks; i++)
{
var task = pendingTasks[i];
if (i > 0 /*&& (DateTime.UtcNow - _sweepStart).TotalMinutes > _taskScheduler.SweepIntervalMinutes*/)
{
// Maybe a subsequent Sweep call or another machine in a webfarm executed
// successive tasks already.
// To be able to determine this, we need to reload the entity from the database.
// The TaskExecutor will exit when the task should be in running state then.
await taskStore.ReloadTaskAsync(task);
task.LastExecution = await taskStore.GetLastExecutionInfoByTaskIdAsync(task.Id);
}
if (task.IsPending)
{
await executor.ExecuteAsync(task, context, taskParameters);
numExecuted++;
}
}
context.Response.StatusCode = StatusCodes.Status200OK;
await context.Response.WriteAsync($"{numExecuted} of {numTasks} pending tasks executed.");
}