Fix all cursors on destroy.
True when no more messages will be consumed.
Get message fromm current non clear Queue or wait. pending must be checked before.
Consumes current message;
Iterates over all messages.
Collects all messages to array.
Minimum count of pending messages. Negative value - new messages will never provided.
Consume current pending message and switch to another Queue. pending must be checked before.
Round robin input channel. Implements InputRange.