public static KeepAliveMessageHandle <T> GetResilient <T>(this IQueueStorageProvider provider, string queueName, TimeSpan keepAliveAfter, int maxProcessingTrials)
where T : class
{
var messages = provider.Get <T>(queueName, 1, keepAliveAfter + TimeSpan.FromSeconds(30), maxProcessingTrials).ToList();
if (messages.Count == 0)
{
return(null);
}
return(new KeepAliveMessageHandle <T>(messages[0], provider, keepAliveAfter, TimeSpan.FromSeconds(30)));
}
public void PutGetDelete()
{
var message = new MyMessage();
QueueStorage.DeleteQueue(QueueName); // deleting queue on purpose
// (it's slow but necessary to really validate the retry policy)
QueueStorage.Put(QueueName, message);
var retrieved = QueueStorage.Get <MyMessage>(QueueName, 1).First();
Assert.AreEqual(message.MyGuid, retrieved.MyGuid, "#A01");
QueueStorage.Delete(retrieved);
}
/// <summary>Gets messages from a queue (derived from the message type T) with a visibility timeout of 2 hours.</summary>
/// <typeparam name="T">Type of the messages.</typeparam>
/// <param name="provider">Queue storage provider.</param>
/// <param name="count">Maximal number of messages to be retrieved.</param>
/// <param name="maxProcessingTrials">
/// Maximum number of message processing trials, before the message is considered as
/// being poisonous, removed from the queue and persisted to the 'failing-messages' store.
/// </param>
/// <returns>Enumeration of messages, possibly empty.</returns>
public static IEnumerable <T> Get <T>(this IQueueStorageProvider provider, int count, int maxProcessingTrials)
{
return(provider.Get <T>(GetDefaultStorageName(typeof(T)), count, new TimeSpan(2, 0, 0), maxProcessingTrials));
}
/// <summary>Gets messages from a queue with a visibility timeout of 2 hours.</summary>
/// <typeparam name="T">Type of the messages.</typeparam>
/// <param name="provider">Queue storage provider.</param>
/// <param name="queueName">Identifier of the queue to be pulled.</param>
/// <param name="count">Maximal number of messages to be retrieved.</param>
/// <param name="maxProcessingTrials">
/// Maximum number of message processing trials, before the message is considered as
/// being poisonous, removed from the queue and persisted to the 'failing-messages' store.
/// </param>
/// <returns>Enumeration of messages, possibly empty.</returns>
public static IEnumerable <T> Get <T>(this IQueueStorageProvider provider, string queueName, int count, int maxProcessingTrials)
{
return(provider.Get <T>(queueName, count, new TimeSpan(2, 0, 0), maxProcessingTrials));
}
