/// <summary>
/// Watches this instance.
/// </summary>
protected virtual void Watch()
{
var idleIntervalInMillisecond = Options.IdleInterval * 1000;
if (idleIntervalInMillisecond < 1000)
{
idleIntervalInMillisecond = 5000;
}
var batchSize = (!Options.BatchSize.HasValue || Options.BatchSize.Value < 1 || Options.BatchSize.Value > 20) ? 1 : Options.BatchSize.Value;
bool needIdle = false;
while (true)
{
try
{
var items = QueueMessageOperator.GetMessages(batchSize, Options.InvisibilityTimeout);
if (items.HasItem())
{
needIdle = false;
if (items.Count == 1)
{
Task.WaitAll(Task.Factory.StartNew(Dispatch, items.FirstOrDefault()));
}
else
{
Task.WaitAll(items.Select(x => Task.Factory.StartNew(Dispatch, x)).ToArray());
}
}
else
{
needIdle = true;
}
needIdle = !items.HasItem();
}
catch (Exception ex)
{
needIdle = true;
WriteException(ex.Handle());
}
if (needIdle)
{
Thread.Sleep(idleIntervalInMillisecond);
}
}
}
/// <summary>
/// Dispatches the specified object.
/// </summary>
/// <param name="obj">The object.</param>
/// <returns></returns>
protected void Dispatch(object obj)
{
QueueMessageItem <T> message = obj as QueueMessageItem <T>;
try
{
message.CheckNullObject(nameof(message));
var result = Process(message);
result.CheckNullObject(nameof(result));
if (result.IsSucceed)
{
QueueMessageOperator.DeleteMessage(message.Id, result.Receipt);
}
else if (result.Exception != null)
{
throw result.Exception;
}
}
catch (Exception ex)
{
WriteException(ex.Handle(new { message }));
}
}
