BRPOPLPUSH is the blocking variant of RPOPLPUSH. When source contains elements, this command behaves exactly like RPOPLPUSH. When used inside a MULTI/EXEC block, this command behaves exactly like RPOPLPUSH. When source is empty, Redis will block the connection until another client pushes to it or until timeout is reached. A timeout of zero can be used to block indefinitely.

See RPOPLPUSH for more information.

@return

@bulk-string-reply: the element being popped from source and pushed to destination. If timeout is reached, a @nil-reply is returned.

Pattern: Reliable queue

Please see the pattern description in the RPOPLPUSH documentation.

Pattern: Circular list

Please see the pattern description in the RPOPLPUSH documentation.