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feat(sessds): Support max subscriptions

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ieQu1 2024-04-13 11:13:17 +02:00
parent 6c897c26ae
commit 113a990482
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GPG Key ID: 488654DF3FED6FDE
2 changed files with 30 additions and 20 deletions
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9
apps/emqx/src/emqx_persistent_session_ds.erl
View File

@ -367,10 +367,10 @@ subscribe(
subscribe( subscribe(
TopicFilter, TopicFilter,
SubOpts, SubOpts,
Session = #{id := ID, s := S0, props := #{upgrade_qos := UpgradeQoS}} Session = #{id := ID}
) -> ) ->
{UpdateRouter, S1} = emqx_persistent_session_ds_subs:on_subscribe( {UpdateRouter, S1} = emqx_persistent_session_ds_subs:on_subscribe(
TopicFilter, UpgradeQoS, SubOpts, S0 TopicFilter, SubOpts, Session
), ),
case UpdateRouter of case UpdateRouter of
true -> true ->
@ -379,9 +379,8 @@ subscribe(
ok ok
end, end,
S = emqx_persistent_session_ds_state:commit(S1), S = emqx_persistent_session_ds_state:commit(S1),
?tp(persistent_session_ds_subscription_added, #{ UpdateRouter andalso
topic_filter => TopicFilter, is_new => UpdateRouter ?tp(persistent_session_ds_subscription_added, #{topic_filter => TopicFilter, session => ID}),
}),
{ok, Session#{s => S}}. {ok, Session#{s => S}}.
-spec unsubscribe(topic_filter(), session()) -> -spec unsubscribe(topic_filter(), session()) ->

25
apps/emqx/src/emqx_persistent_session_ds_subs.erl
View File

@ -25,7 +25,7 @@
%% API: %% API:
-export([ -export([
on_subscribe/4, on_subscribe/3,
on_unsubscribe/2, on_unsubscribe/2,
gc/1, gc/1,
lookup/2, lookup/2,
@ -73,26 +73,37 @@
%% @doc Process a new subscription %% @doc Process a new subscription
-spec on_subscribe( -spec on_subscribe(
emqx_persistent_session_ds:topic_filter(), emqx_persistent_session_ds:topic_filter(),
boolean(),
emqx_types:subopts(), emqx_types:subopts(),
emqx_persistent_session_ds_state:t() emqx_persistent_session_ds:session()
) -> ) ->
{_UpdateRouter :: boolean(), emqx_persistent_session_ds_state:t()}. {_UpdateRouter :: boolean(), emqx_persistent_session_ds_state:t()}.
on_subscribe(TopicFilter, UpgradeQoS, SubOpts, S0) -> on_subscribe(TopicFilter, SubOpts, #{s := S0, props := Props}) ->
#{upgrade_qos := UpgradeQoS, max_subscriptions := MaxSubscriptions} = Props,
case emqx_persistent_session_ds_state:get_subscription(TopicFilter, S0) of case emqx_persistent_session_ds_state:get_subscription(TopicFilter, S0) of
undefined -> undefined ->
%% This is a new subscription: %% This is a new subscription:
case emqx_persistent_session_ds_state:n_subscriptions(S0) < MaxSubscriptions of
true ->
{SubId, S1} = emqx_persistent_session_ds_state:new_id(S0), {SubId, S1} = emqx_persistent_session_ds_state:new_id(S0),
{SStateId, S2} = emqx_persistent_session_ds_state:new_id(S1), {SStateId, S2} = emqx_persistent_session_ds_state:new_id(S1),
SState = #{parent_subscription => SubId, upgrade_qos => UpgradeQoS, subopts => SubOpts}, SState = #{
S3 = emqx_persistent_session_ds_state:put_subscription_state(SStateId, SState, S2), parent_subscription => SubId, upgrade_qos => UpgradeQoS, subopts => SubOpts
},
S3 = emqx_persistent_session_ds_state:put_subscription_state(
SStateId, SState, S2
),
Subscription = #{ Subscription = #{
id => SubId, id => SubId,
current_state => SStateId, current_state => SStateId,
start_time => now_ms() start_time => now_ms()
}, },
S = emqx_persistent_session_ds_state:put_subscription(TopicFilter, Subscription, S3), S = emqx_persistent_session_ds_state:put_subscription(
TopicFilter, Subscription, S3
),
{true, S}; {true, S};
false ->
{false, S0}
end;
Sub0 = #{current_state := SStateId0, id := SubId} -> Sub0 = #{current_state := SStateId0, id := SubId} ->
SState = #{parent_subscription => SubId, upgrade_qos => UpgradeQoS, subopts => SubOpts}, SState = #{parent_subscription => SubId, upgrade_qos => UpgradeQoS, subopts => SubOpts},
case emqx_persistent_session_ds_state:get_subscription_state(SStateId0, S0) of case emqx_persistent_session_ds_state:get_subscription_state(SStateId0, S0) of