/// <summary>
/// Try to get message with back off if waitFor is specified
/// </summary>
/// <param name="queueName">queue name</param>
/// <param name="method">get message lambda</param>
/// <param name="waitFor">wait for (optional)</param>
/// <returns></returns>
private async Task <InternalMessageV1> TryWithBackoff(string queueName, Func <Task <InternalMessageV1> > method, TimeSpan?waitFor)
{
InternalMessageV1 result = await method();
if (result != null || waitFor == null)
{
return(result);
}
AutoResetEvent autoResetEvent;
if (!_event.TryGetValue(queueName, out autoResetEvent))
{
autoResetEvent = null;
}
DateTime start = DateTime.Now;
TimeSpan sleep = _startSleep;
while (true)
{
if (DateTime.Now - start > waitFor)
{
return(null);
}
bool signal = false;
if (autoResetEvent == null)
{
await Task.Delay(sleep);
}
else
{
signal = autoResetEvent.WaitOne(sleep);
}
result = await method();
if (result != null)
{
return(result);
}
if (sleep < waitFor && sleep < _maxSleep)
{
sleep += _incrementSleep;
}
}
}
public static MessageContractV1 ConvertTo(this InternalMessageV1 self)
{
if (self == null)
{
return(null);
}
return(new MessageContractV1
{
MessageId = self.MessageId,
QueueId = self.QueueId,
ClientMessageId = self.ClientMessageId,
Cv = self.Cv,
Payload = self.Payload,
LockedDate = self.LockedDate,
LockedByAgentId = self.LockedByAgentId,
RetryCount = self.RetryCount,
CreatedByAgentId = self.CreatedByAgentId,
_createdDate = self._createdDate,
});
}
