/// <summary>
/// This worker method handles wrapping a batch of items and fire the user-provided batch handler, and handles cleanup of any uncompleted batch items
/// </summary>
/// <param name="e">List of items included in the batch</param>
/// <returns></returns>
private async Task batchProcessor_DoWork(AsyncListProcessorItemEventArgs <List <InternalBatchProcessorItem> > e)
{
var batch = e.Item;
try
{
//Create a read-only collection to send to the user-provided handler
var userBatch = batch.Select(item => new BatchProcessorRequest(item)).ToList();
var readOnlyUserBatch = new ReadOnlyCollection <BatchProcessorRequest>(userBatch);
await userBatchProcessorHandler(readOnlyUserBatch);
}
catch (Exception ex)
{
TraceQueue.Trace(this, TracingLevel.Warning, "{0} occurred while processing batch: {1}", ex.GetType().Name, ex.Message);
}
finally
{
//Force any item left uncompleted into either an exception or default response
foreach (var item in batch)
{
if (!item.Task.IsCompleted)
{
if (this.UnprocessedItemAction == UnprocessedItemAction.ThrowException)
{
item.TaskSource.TrySetException(new TaskCanceledException("Task was not processed by batch processor handler"));
}
else
{
item.TaskSource.TrySetResult(default(TResponse));
}
}
}
}
}
private Task processItem(AsyncListProcessorItemEventArgs <AsyncListTestObject> e)
{
e.Item.SetResult(true);
return(Task.FromResult(true));
}
