Advances the specified subscriptions to the next entry in the linked list
Gets number of messages that this entry represents
Attempts to dispatch the current entry to the subscriptions position at the entry.
When the entry expires or 0 if it does not expire.
Is the entry acquired by a subscription.
Gets the message key for the entry.
Called to increment the redelivery counter
When the entry expires or 0 if it does not expire.
Removes the entry from the queue's linked list of entries.
Removes the entry from the queue's linked list of entries. This gets called as a result of an acquired ack.
Gets the size of this entry in bytes.
Gets the size of this entry in bytes. The head and tail entries always return 0.
Triggers the entry to get swapped in if it's not already swapped in.
Triggers the entry to get swapped out if it's not already swapped.