/// <summary>
/// Finds and subscribes to the queue and sends response
/// </summary>
private async Task Subscribe(MqClient client, HorseMessage message)
{
HorseQueue queue = _server.FindQueue(message.Target);
//if auto creation active, try to create queue
if (queue == null && _server.Options.AutoQueueCreation)
{
QueueOptions options = QueueOptions.CloneFrom(_server.Options);
queue = await _server.CreateQueue(message.Target, options, message, _server.DeliveryHandlerFactory, true, true);
}
if (queue == null)
{
if (message.WaitResponse)
{
await client.SendAsync(message.CreateResponse(HorseResultCode.NotFound));
}
return;
}
QueueClient found = queue.FindClient(client.UniqueId);
if (found != null)
{
if (message.WaitResponse)
{
await client.SendAsync(message.CreateResponse(HorseResultCode.Ok));
}
return;
}
QueueSubscriptionResult result = await queue.AddClient(client);
if (message.WaitResponse)
{
switch (result)
{
case QueueSubscriptionResult.Success:
await client.SendAsync(message.CreateResponse(HorseResultCode.Ok));
break;
case QueueSubscriptionResult.Unauthorized:
await client.SendAsync(message.CreateResponse(HorseResultCode.Unauthorized));
break;
case QueueSubscriptionResult.Full:
await client.SendAsync(message.CreateResponse(HorseResultCode.LimitExceeded));
break;
}
}
}
/// <summary>
/// Handles pulling a message from a queue
/// </summary>
private async Task HandlePullRequest(MqClient client, HorseMessage message, HorseQueue queue)
{
//only pull statused queues can handle this request
if (queue.Status != QueueStatus.Pull)
{
if (!string.IsNullOrEmpty(message.MessageId))
{
await client.SendAsync(MessageBuilder.CreateNoContentPullResponse(message, HorseHeaders.UNACCEPTABLE));
}
return;
}
//client cannot pull message from the queue not in
QueueClient queueClient = queue.FindClient(client);
if (queueClient == null)
{
if (!string.IsNullOrEmpty(message.MessageId))
{
await client.SendAsync(MessageBuilder.CreateNoContentPullResponse(message, HorseHeaders.UNACCEPTABLE));
}
return;
}
//check authorization
foreach (IClientAuthorization authorization in _server.Authorizations)
{
bool grant = await authorization.CanPullFromQueue(queueClient, queue);
if (!grant)
{
if (!string.IsNullOrEmpty(message.MessageId))
{
await client.SendAsync(MessageBuilder.CreateNoContentPullResponse(message, HorseHeaders.UNAUTHORIZED));
}
return;
}
}
await queue.State.Pull(queueClient, message);
}