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%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(rabbit_vhost_msg_store).
-include("rabbit.hrl").
-export([start/4, stop/2, client_init/5, successfully_recovered_state/2]).
-export([vhost_store_pid/2]).
start(VHost, Type, ClientRefs, StartupFunState) when is_list(ClientRefs);
ClientRefs == undefined ->
case rabbit_vhost_sup_sup:get_vhost_sup(VHost) of
{ok, VHostSup} ->
VHostDir = rabbit_vhost:msg_store_dir_path(VHost),
supervisor2:start_child(VHostSup,
{Type, {rabbit_msg_store, start_link,
[Type, VHostDir, ClientRefs, StartupFunState]},
transient, ?MSG_STORE_WORKER_WAIT, worker, [rabbit_msg_store]});
%% we can get here if a vhost is added and removed concurrently
%% e.g. some integration tests do it
{error, {no_such_vhost, VHost}} = E ->
rabbit_log:error("Failed to start a message store for vhost ~s: vhost no longer exists!",
[VHost]),
E
end.
stop(VHost, Type) ->
case rabbit_vhost_sup_sup:get_vhost_sup(VHost) of
{ok, VHostSup} ->
ok = supervisor2:terminate_child(VHostSup, Type),
ok = supervisor2:delete_child(VHostSup, Type);
%% see start/4
{error, {no_such_vhost, VHost}} ->
rabbit_log:error("Failed to stop a message store for vhost ~s: vhost no longer exists!",
[VHost]),
ok
end.
client_init(VHost, Type, Ref, MsgOnDiskFun, CloseFDsFun) ->
with_vhost_store(VHost, Type, fun(StorePid) ->
rabbit_msg_store:client_init(StorePid, Ref, MsgOnDiskFun, CloseFDsFun)
end).
with_vhost_store(VHost, Type, Fun) ->
case vhost_store_pid(VHost, Type) of
no_pid ->
throw({message_store_not_started, Type, VHost});
Pid when is_pid(Pid) ->
Fun(Pid)
end.
vhost_store_pid(VHost, Type) ->
{ok, VHostSup} = rabbit_vhost_sup_sup:get_vhost_sup(VHost),
case supervisor2:find_child(VHostSup, Type) of
[Pid] -> Pid;
[] -> no_pid
end.
successfully_recovered_state(VHost, Type) ->
with_vhost_store(VHost, Type, fun(StorePid) ->
rabbit_msg_store:successfully_recovered_state(StorePid)
end).
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