/// <summary>
/// Initializes a new instance of the <see cref="DequeueClientServiceBase"/> class.
/// </summary>
/// <param name="getDequeueServiceConfig">Callback for dequeue service config.</param>
/// <param name="dequeueQueuePath">The dequeue queue path.</param>
/// <param name="logger">The listener log.</param>
/// <param name="instances">The number of concurrent execution instances we should have.</param>
protected DequeueClientServiceBase(
Func <DequeueServiceConfig> getDequeueServiceConfig,
string dequeueQueuePath,
ILogger logger,
int instances)
: base(logger, instances)
{
_getDequeueServiceConfig = getDequeueServiceConfig ?? throw new ArgumentNullException(nameof(getDequeueServiceConfig));
// We create the dequeue and dead letter queue on construction. This can throw exceptions.
_dequeueQueuePath = !string.IsNullOrWhiteSpace(dequeueQueuePath) ? dequeueQueuePath : throw new ArgumentException("The dequeue queue path is null or white space.", nameof(dequeueQueuePath));
_deadLetterQueuePath = DequeueServiceConfig.DeadLetterQueuePath(dequeueQueuePath);
}
/// <summary>
/// Clears all the queues and its corresponding dead letter queue.
/// </summary>
/// <param name="queuePaths">Queue paths.</param>
private static void ClearQueues(params string[] queuePaths)
{
foreach (var path in queuePaths)
{
// Note that this must be the same as DequeueClientServiceBase.DeadLetterQueuePathFormat.
using (var deadLetterQueue = GatewayMessageQueue.Get(DequeueServiceConfig.DeadLetterQueuePath(path)))
using (var queue = GatewayMessageQueue.Get(path))
{
deadLetterQueue.Clear();
queue.Clear();
}
}
}
