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Close #10543. Add If-Unused and If-Empty support for delete_queue for QQs #10711

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Close #10543. Add If-Unused and If-Empty support for delete_queue for QQs #10711

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4 changes: 2 additions & 2 deletions deps/rabbit/docs/rabbitmqctl.8
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Expand Up @@ -2130,9 +2130,9 @@ Evaluates an Erlang expression on the target node
.It Ar queue_name
The name of the queue to delete.
.It Ar --if-empty
Delete the queue if it is empty (has no messages ready for delivery)
Delete the queue if it is empty (has no messages ready for delivery). Ignored for Streams
.It Ar --if-unused
Delete the queue only if it has no consumers
Delete the queue only if it has no consumers. Ignored for Streams
.El
.Pp
Deletes a queue.
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91 changes: 44 additions & 47 deletions deps/rabbit/src/rabbit_quorum_queue.erl
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Expand Up @@ -713,59 +713,56 @@ restart_server({_, _} = Ref) ->
-spec delete(amqqueue:amqqueue(),
boolean(), boolean(),
rabbit_types:username()) ->
{ok, QLen :: non_neg_integer()} |
{protocol_error, Type :: atom(), Reason :: string(), Args :: term()}.
delete(Q, true, _IfEmpty, _ActingUser) when ?amqqueue_is_quorum(Q) ->
{protocol_error, not_implemented,
"cannot delete ~ts. queue.delete operations with if-unused flag set are not supported by quorum queues",
[rabbit_misc:rs(amqqueue:get_name(Q))]};
delete(Q, _IfUnused, true, _ActingUser) when ?amqqueue_is_quorum(Q) ->
{protocol_error, not_implemented,
"cannot delete ~ts. queue.delete operations with if-empty flag set are not supported by quorum queues",
[rabbit_misc:rs(amqqueue:get_name(Q))]};
delete(Q, _IfUnused, _IfEmpty, ActingUser) when ?amqqueue_is_quorum(Q) ->
{ok, QLen :: non_neg_integer()}.
delete(Q, IfUnused, IfEmpty, ActingUser) when ?amqqueue_is_quorum(Q) ->
{Name, _} = amqqueue:get_pid(Q),
QName = amqqueue:get_name(Q),
QNodes = get_nodes(Q),
%% TODO Quorum queue needs to support consumer tracking for IfUnused
Timeout = ?DELETE_TIMEOUT,
{ok, ReadyMsgs, _} = stat(Q),
Servers = [{Name, Node} || Node <- QNodes],
case ra:delete_cluster(Servers, Timeout) of
{ok, {_, LeaderNode} = Leader} ->
MRef = erlang:monitor(process, Leader),
receive
{'DOWN', MRef, process, _, _} ->

{ok, ReadyMsgs, Consumers} = stat(Q),
IsEmpty = ReadyMsgs == 0,
IsUnused = Consumers == 0,
if IfEmpty and not(IsEmpty) -> {error, not_empty};
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There is no need to line up bits of code like that. Please only use a single white space between things.
If you want the start of clauses to line up in columns use newlines.

IfUnused and not(IsUnused) -> {error, in_use};
true ->
Timeout = ?DELETE_TIMEOUT,
Servers = [{Name, Node} || Node <- QNodes],
case ra:delete_cluster(Servers, Timeout) of
{ok, {_, LeaderNode} = Leader} ->
MRef = erlang:monitor(process, Leader),
receive
{'DOWN', MRef, process, _, _} ->
ok
after Timeout ->
erlang:demonitor(MRef, [flush]),
ok = force_delete_queue(Servers)
end,
notify_decorators(QName, shutdown),
ok = delete_queue_data(Q, ActingUser),
_ = erpc:call(LeaderNode, rabbit_core_metrics, queue_deleted, [QName],
?RPC_TIMEOUT),
{ok, ReadyMsgs};
{error, {no_more_servers_to_try, Errs}} ->
case lists:all(fun({{error, noproc}, _}) -> true;
(_) -> false
end, Errs) of
true ->
%% If all ra nodes were already down, the delete
%% has succeed
delete_queue_data(Q, ActingUser),
after Timeout ->
erlang:demonitor(MRef, [flush]),
ok = force_delete_queue(Servers)
end,
notify_decorators(QName, shutdown),
ok = delete_queue_data(Q, ActingUser),
_ = erpc:call(LeaderNode, rabbit_core_metrics, queue_deleted, [QName],
?RPC_TIMEOUT),
{ok, ReadyMsgs};
false ->
%% attempt forced deletion of all servers
rabbit_log:warning(
"Could not delete quorum '~ts', not enough nodes "
" online to reach a quorum: ~255p."
{error, {no_more_servers_to_try, Errs}} ->
case lists:all(fun({{error, noproc}, _}) -> true;
(_) -> false
end, Errs) of
true ->
%% If all ra nodes were already down, the delete
%% has succeed
delete_queue_data(Q, ActingUser),
{ok, ReadyMsgs};
false ->
%% attempt forced deletion of all servers
rabbit_log:warning(
"Could not delete quorum '~ts', not enough nodes "
" online to reach a quorum: ~255p."
" Attempting force delete.",
[rabbit_misc:rs(QName), Errs]),
ok = force_delete_queue(Servers),
notify_decorators(QName, shutdown),
delete_queue_data(Q, ActingUser),
{ok, ReadyMsgs}
[rabbit_misc:rs(QName), Errs]),
ok = force_delete_queue(Servers),
notify_decorators(QName, shutdown),
delete_queue_data(Q, ActingUser),
{ok, ReadyMsgs}
end
end
end.

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