private async Task DeleteOrReleaseMessage(QueueMessageContext <T> context, QueueMessage queueMessage)
{
if (context.Success)
{
await queueMessage.Delete();
}
else
{
await queueMessage.Release(_delay);
}
}
/// <summary>
/// Consumes the next message off the queue. Set context.Success to <c>false</c> to *Release* the message back to the queue; otherwise it will be automatically deleted.
/// </summary>
/// <param name="consumeAction"></param>
/// <param name="timeout"></param>
/// <returns>
/// Returns <c>false</c> if the queue is empty; otherwise <c>true</c>.
/// </returns>
public bool Consume(Action <QueueMessageContext <T>, T> consumeAction, int?timeout = null)
{
QueueMessage queueMessage = Next(timeout);
if (queueMessage == null)
{
return(false);
}
var context = new QueueMessageContext <T>
{
Message = queueMessage,
Success = true,
Client = this
};
try
{
consumeAction(context, queueMessage.ReadValueAs <T>());
}
catch (Exception ex)
{
if (_errorHandler != null)
{
context.Success = false;
_errorHandler(context, ex);
}
else
{
throw;
}
}
finally
{
if (context.Success)
{
queueMessage.Delete();
}
else
{
queueMessage.Release(_delay);
}
}
return(true);
}
/// <summary>
/// Consumes the next message off the queue. Set context.Success to <c>false</c> to *Release* the message back to the
/// queue; otherwise it will be automatically deleted.
/// </summary>
/// <param name="consumeAction"></param>
/// <param name="timeout"></param>
/// <returns>
/// Returns <c>false</c> if the queue is empty; otherwise <c>true</c>.
/// </returns>
public async Task <bool> Consume(Action <QueueMessageContext <T>, T> consumeAction, int?timeout = null)
{
QueueMessage queueMessage = await Next(timeout);
if (queueMessage == null)
{
return(false);
}
var context = new QueueMessageContext <T>
{
Message = queueMessage,
Success = true,
Client = this
};
try
{
consumeAction(context, queueMessage.ReadValueAs <T>());
}
catch (Exception ex)
{
if (_errorHandler != null)
{
context.Success = false;
_errorHandler(context, ex);
}
else
{
throw;
}
}
finally
{
DeleteOrReleaseMessage(context, queueMessage).Wait();
}
return(true);
}