/// <summary>
/// Allocates a message in a block and returns the block the message is in.
/// </summary>
/// <param name="queueMessage"></param>
/// <param name="dequeueTimeUtc"></param>
/// <param name="streamPosition"></param>
/// <returns></returns>
public CachedMessageBlock <TCachedMessage> AllocateMessage(TQueueMessage queueMessage, DateTime dequeueTimeUtc, out StreamPosition streamPosition)
{
streamPosition = default(StreamPosition);
if (queueMessage == null)
{
throw new ArgumentNullException("queueMessage");
}
// allocate new cached message block if needed
if (currentMessageBlock == null || !currentMessageBlock.HasCapacity)
{
currentMessageBlock = messagePool.Allocate();
}
streamPosition = currentMessageBlock.Add(queueMessage, dequeueTimeUtc, dataAdapter);
return(currentMessageBlock);
}
/// <summary>
/// Allocates a message in a block and returns the block the message is in.
/// </summary>
/// <param name="queueMessage"></param>
/// <param name="dequeueTimeUtc"></param>
/// <param name="streamPosition"></param>
/// <returns></returns>
public CachedMessageBlock <TCachedMessage> AllocateMessage(TQueueMessage queueMessage, DateTime dequeueTimeUtc, out StreamPosition streamPosition)
{
streamPosition = default(StreamPosition);
if (queueMessage == null)
{
throw new ArgumentNullException(nameof(queueMessage));
}
CachedMessageBlock <TCachedMessage> returnBlock = currentMessageBlock ?? (currentMessageBlock = messagePool.Allocate());
streamPosition = returnBlock.Add(queueMessage, dequeueTimeUtc, dataAdapter);
// blocks at capacity are eligable for purge, so we don't want to be holding on to them.
if (!currentMessageBlock.HasCapacity)
{
currentMessageBlock = messagePool.Allocate();
}
return(returnBlock);
}
