private void SetQosAndCreateConsumers()
{
if (!AcknowledgeMode.IsAutoAck() && !Cancelled)
{
// Set basicQos before calling basicConsume (otherwise if we are not acking the broker
// will send blocks of 100 messages)
try
{
Channel.BasicQos(0, PrefetchCount, true);
}
catch (Exception e)
{
ActiveObjectCounter.Release(this);
throw new RabbitIOException(e);
}
}
try
{
if (!Cancelled)
{
foreach (var queueName in Queues)
{
if (!MissingQueues.Contains(queueName))
{
ConsumeFromQueue(queueName);
}
}
}
}
catch (Exception e)
{
throw RabbitExceptionTranslator.ConvertRabbitAccessException(e);
}
}
public bool CommitIfNecessary(bool localTx)
{
if (DeliveryTags.Count == 0)
{
return(false);
}
var isLocallyTransacted = localTx || (Transactional && TransactionSynchronizationManager.GetResource(ConnectionFactory) == null);
try
{
var ackRequired = !AcknowledgeMode.IsAutoAck() && !AcknowledgeMode.IsManual();
if (ackRequired && (!Transactional || isLocallyTransacted))
{
var deliveryTag = new List <ulong>(DeliveryTags)[DeliveryTags.Count - 1];
Channel.BasicAck(deliveryTag, true);
}
if (isLocallyTransacted)
{
// For manual acks we still need to commit
RabbitUtils.CommitIfNecessary(Channel);
}
}
finally
{
DeliveryTags.Clear();
}
return(true);
}
private SimpleConsumer Consume(string queue, Connection.IConnection connection)
{
R.IModel channel = null;
SimpleConsumer consumer = null;
try
{
channel = connection.CreateChannel(IsChannelTransacted);
channel.BasicQos(0, (ushort)PrefetchCount, false); // TODO: Verify this
consumer = new SimpleConsumer(this, connection, channel, queue);
channel.QueueDeclarePassive(queue);
consumer.ConsumerTag = channel.BasicConsume(
queue,
AcknowledgeMode.IsAutoAck(),
ConsumerTagStrategy != null ? ConsumerTagStrategy.CreateConsumerTag(queue) : string.Empty,
NoLocal,
Exclusive,
ConsumerArguments,
consumer);
}
// catch (AmqpApplicationContextClosedException e)
// {
// throw new AmqpConnectException(e);
// }
catch (Exception e)
{
RabbitUtils.CloseChannel(channel, _logger);
RabbitUtils.CloseConnection(connection, _logger);
consumer = HandleConsumeException(queue, consumer, e);
}
return(consumer);
}
protected virtual void ValidateConfiguration()
{
if (!(ExposeListenerChannel || !AcknowledgeMode.IsManual()))
{
throw new ArgumentException(
"You cannot acknowledge messages manually if the channel is not exposed to the listener "
+ "(please check your configuration and set exposeListenerChannel=true or " +
"acknowledgeMode!=MANUAL)");
}
if (IsChannelTransacted && AcknowledgeMode.IsAutoAck())
{
throw new ArgumentException(
"The acknowledgeMode is NONE (autoack in Rabbit terms) which is not consistent with having a "
+ "transactional channel. Either use a different AcknowledgeMode or make sure " +
"channelTransacted=false");
}
}
private void ConsumeFromQueue(string queue)
{
var consumer = new InternalConsumer(this, Channel, queue);
var consumerTag = Channel.BasicConsume(
queue,
AcknowledgeMode.IsAutoAck(),
TagStrategy != null ? TagStrategy.CreateConsumerTag(queue) : string.Empty,
NoLocal,
Exclusive,
ConsumerArgs,
consumer);
if (consumerTag != null)
{
Logger?.LogDebug("Started on queue '{queue}' with tag {consumerTag} : {consumer}", queue, consumerTag, ToString());
}
else
{
Logger?.LogError("Null consumer tag received for queue: {queue} ", queue);
}
}
public void RollbackOnExceptionIfNecessary(Exception ex)
{
bool ackRequired = !AcknowledgeMode.IsAutoAck() && (!AcknowledgeMode.IsManual() || ContainerUtils.IsRejectManual(ex));
try
{
if (Transactional)
{
Logger?.LogDebug(ex, "Initiating transaction rollback on application exception");
RabbitUtils.RollbackIfNecessary(Channel);
}
if (ackRequired)
{
if (DeliveryTags.Count > 0)
{
ulong deliveryTag = DeliveryTags.Max();
Channel.BasicNack(deliveryTag, true, ContainerUtils.ShouldRequeue(DefaultRequeueRejected, ex, Logger));
}
if (Transactional)
{
// Need to commit the reject (=nack)
RabbitUtils.CommitIfNecessary(Channel);
}
}
}
catch (Exception e)
{
Logger?.LogError(ex, "Application exception overridden by rollback exception");
throw RabbitExceptionTranslator.ConvertRabbitAccessException(e); // NOSONAR stack trace loss
}
finally
{
DeliveryTags.Clear();
}
}