/// <summary>
/// decides if and when to retry sending the request
/// </summary>
/// <param name="request">the request object</param>
private async void Retry(QueueRequest request)
{
request.Attempts++;
if (request.Attempts < MaxAttempts)
{
int delay = (int)FixedRetryDelay.TotalMilliseconds;
if (RetryStrategy == QueueRetryStrategy.ExponentialBackoff)
{
delay = (int)Math.Pow(2, request.Attempts) * 1000;
}
// add delay before the retry
await Task.Delay(delay);
// re-add the request into the queue
requests.Enqueue(request);
}
}
/// <summary>
/// Enqueue a message to be sent
/// </summary>
/// <param name="uri">Uri to be used, shouldn't start with / and will be prefixed with the base address</param>
/// <param name="message">the JSON message to send, if null is passed HTTP GET will be used</param>
public void Enqueue(string uri, string message = null)
{
QueueRequest request = new QueueRequest()
{
Message = message,
RequestUri = new Uri(httpClient.BaseAddress.OriginalString + uri),
Method = message == null ? HttpMethod.Get : HttpMethod.Post,
Attempts = 0
};
requests.Enqueue(request);
// throw away old messages in case the queue is full
lock (syncObject)
{
while (requests.Count > MaxQueueSize)
{
requests.TryDequeue(out request);
}
}
}