/// <summary>
/// Returns messages from RabbitMQ.
/// </summary>
/// <param name="offset">Offset from start.</param>
/// <param name="count">Count of messages.</param>
/// <param name="clientId">Filter queues by client ID, empty string - do not filter.</param>
/// <param name="messageTypeId">Filter queues by message type ID, empty string - do not filter.</param>
/// <returns>Messages from RabbitMQ.</returns>
public ServiceBusMessage[] GetMessages(int offset, int count, string clientId, string messageTypeId)
{
if (offset < 0)
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
if (count < 1)
{
throw new ArgumentOutOfRangeException(nameof(count));
}
int skipped = 0;
var sbMessages = new List <ServiceBusMessage>();
IEnumerable <RabbitMQQueue> queues = FilterQueues(_managementClient.GetQueuesAsync().Result, clientId, messageTypeId);
foreach (var queue in queues)
{
skipped += queue.Messages;
if (skipped > offset)
{
string _clientId;
string _messageTypeId;
_namingManager.ParseQueueName(queue.Name, out _clientId, out _messageTypeId);
var client = new Client()
{
ID = _clientId
};
var messageType = new MessageType()
{
ID = _messageTypeId
};
int skipInQueue = offset > 0 ? queue.Messages - (skipped - offset) : offset;
int getFromQueue = Math.Min(queue.Messages, count + skipInQueue - sbMessages.Count);
var getMessagesCriteria = new GetMessagesCriteria(getFromQueue, Ackmodes.ack_requeue_true);
IEnumerable <RabbitMQMessage> rmqMessages = _managementClient.GetMessagesFromQueueAsync(queue, getMessagesCriteria).Result.Skip(skipInQueue);
foreach (var rmqMessage in rmqMessages)
{
ServiceBusMessage sbMessage = _messageConverter.ConvertFromMqFormat(Convert.FromBase64String(rmqMessage.Payload), null);
sbMessage.Recipient = client;
sbMessage.MessageType = messageType;
sbMessages.Add(sbMessage);
}
if (sbMessages.Count == count)
{
break;
}
}
}
return(sbMessages.ToArray());
}
/// <summary>
/// Получение сообщения для подписчика.
/// </summary>
/// <param name="clientId">Идентификатор клиента.</param>
/// <param name="messageTypeId">Идентификатор типа сообщения.</param>
/// <returns>Сообщения или null, если сообщения нет.</returns>
public Message ReadMessage(string clientId, string messageTypeId)
{
MessageWithNotTypedPk result = null;
var queueName = _namingManager.GetClientQueueName(clientId, messageTypeId);
var message = SharedModel.BasicGet(queueName, false);
if (message != null)
{
result = _converter.ConvertFromMqFormat(message.Body, message.BasicProperties.Headers);
result.MessageType = new MessageType()
{
ID = messageTypeId
};
result.__PrimaryKey = message.DeliveryTag;
}
return(result);
}
