Pops an element from a list, pushes it to another list and returns it. Blocks until an element is available otherwise. Deletes the list if the last element was moved.
BLMOVE
source
destination <LEFT
|
RIGHT
>
<LEFT
|
RIGHT
> timeout
BLMOVE
is the blocking variant of LMOVE
.
When source
contains elements, this command behaves exactly
like LMOVE
. When used inside a
MULTI
/EXEC
block, this command behaves exactly
like LMOVE
. When source
is empty, Valkey will
block the connection until another client pushes to it or until
timeout
(a double value specifying the maximum number of
seconds to block) is reached. A timeout
of zero can be used
to block indefinitely.
This command comes in place of the now deprecated
BRPOPLPUSH
. Doing BLMOVE RIGHT LEFT
is
equivalent.
See LMOVE
for more information.
Please see the pattern description in the LMOVE
documentation.
Please see the pattern description in the LMOVE
documentation.
One of the following:
Bulk string reply: the element being popped from the source and pushed to the destination.
Nil reply: the operation timed-out
One of the following:
Bulk string reply: the element being popped from the source and pushed to the destination.
Null reply: the operation timed-out
O(1)
@blocking @list @slow @write
BLMPOP, BLPOP, BRPOP, LINDEX, LINSERT, LLEN, LMOVE, LMPOP, LPOP, LPOS, LPUSH, LPUSHX, LRANGE, LREM, LSET, LTRIM, RPOP, RPUSH, RPUSHX.