/// <remarks>
/// Calling QueueDeclare will return the number of messages that exist in the queue.
/// QueueDeclare is idempotent so it can be called regardless if the queue exists.
/// </remarks>
public EnqueuedAndFetchedCountDto GetEnqueuedAndFetchedCount(string queue)
{
using (var client = new RabbitMqJobQueue(new[] { queue }, _factory, null))
{
var channel = client.Channel.QueueDeclare(queue, true, false, false, null);
return(new EnqueuedAndFetchedCountDto
{
EnqueuedCount = (int)channel.MessageCount
});
}
}
public RabbitMqJobQueueProvider(string[] queues, ConnectionFactory configureAction,
[CanBeNull] Action <IModel> configureConsumer = null)
{
if (queues == null)
{
throw new ArgumentNullException(nameof(queues));
}
if (configureAction == null)
{
throw new ArgumentNullException(nameof(configureAction));
}
_jobQueue = new RabbitMqJobQueue(queues, configureAction, configureConsumer);
_monitoringApi = new RabbitMqMonitoringApi(configureAction, queues);
}
/// <remarks>
/// RabbitMq does not have a Peek feature, the solution is to dequeue all messages
/// with acknowledgments required (noAck = false). After all messages have been read
/// we dispose the RabbitMqJobQueue causing the channel to close. All unack'd
/// messages then get requeued in order.
/// </remarks>
public IEnumerable <int> GetEnqueuedJobIds(string queue, int @from, int perPage)
{
using (var client = new RabbitMqJobQueue(new[] { queue }, _factory))
{
var consumer = new Subscription(client.Channel, queue, true);
var jobIds = new List <int>();
while (consumer.Next(1000, out var delivery))
{
var body = Encoding.UTF8.GetString(delivery.Body);
jobIds.Add(Convert.ToInt32(body));
}
return(jobIds.Skip(@from).Take(perPage));
}
}
