feat: http connector support async sending

apps/emqx_bridge/src/schema/emqx_bridge_schema.erl

@@ -27,15 +27,15 @@
 %%======================================================================================
 %% For HTTP APIs
 get_response() ->
-    http_schema("get").
+    api_schema("get").
 
 put_request() ->
-    http_schema("put").
+    api_schema("put").
 
 post_request() ->
-    http_schema("post").
+    api_schema("post").
 
-http_schema(Method) ->
+api_schema(Method) ->
     Broker =
         lists:flatmap(
             fun(Type) ->
@@ -46,17 +46,17 @@ http_schema(Method) ->
             end,
             ?CONN_TYPES
         ) ++ [ref(Module, Method) || Module <- [emqx_bridge_webhook_schema]],
-    EE = ee_schemas(Method),
+    EE = ee_api_schemas(Method),
     hoconsc:union(Broker ++ EE).
 
 -if(?EMQX_RELEASE_EDITION == ee).
-ee_schemas(Method) ->
+ee_api_schemas(Method) ->
     emqx_ee_bridge:api_schemas(Method).
 
 ee_fields_bridges() ->
     emqx_ee_bridge:fields(bridges).
 -else.
-ee_schemas(_) ->
+ee_api_schemas(_) ->
     [].
 
 ee_fields_bridges() ->

apps/emqx_connector/src/emqx_connector_http.erl

@@ -30,6 +30,7 @@
     on_start/2,
     on_stop/2,
     on_query/3,
+    on_query_async/4,
     on_get_status/2
 ]).
 
@@ -165,7 +166,7 @@ ref(Field) -> hoconsc:ref(?MODULE, Field).
 
 %% ===================================================================
 
-callback_mode() -> always_sync.
+callback_mode() -> async_if_possible.
 
 on_start(
     InstId,
@@ -231,7 +232,8 @@ on_stop(InstId, #{pool_name := PoolName}) ->
 on_query(InstId, {send_message, Msg}, State) ->
     case maps:get(request, State, undefined) of
         undefined ->
-            ?SLOG(error, #{msg => "request_not_found", connector => InstId});
+            ?SLOG(error, #{msg => "arg_request_not_found", connector => InstId}),
+            {error, arg_request_not_found};
         Request ->
             #{
                 method := Method,
@@ -302,6 +304,51 @@ on_query(
     end,
     Result.
 
+on_query_async(InstId, {send_message, Msg}, ReplyFun, State) ->
+    case maps:get(request, State, undefined) of
+        undefined ->
+            ?SLOG(error, #{msg => "arg_request_not_found", connector => InstId}),
+            {error, arg_request_not_found};
+        Request ->
+            #{
+                method := Method,
+                path := Path,
+                body := Body,
+                headers := Headers,
+                request_timeout := Timeout
+            } = process_request(Request, Msg),
+            on_query_async(
+                InstId,
+                {undefined, Method, {Path, Headers, Body}, Timeout},
+                ReplyFun,
+                State
+            )
+    end;
+on_query_async(
+    InstId,
+    {KeyOrNum, Method, Request, Timeout},
+    ReplyFun,
+    #{pool_name := PoolName, base_path := BasePath} = State
+) ->
+    ?TRACE(
+        "QUERY_ASYNC",
+        "http_connector_received",
+        #{request => Request, connector => InstId, state => State}
+    ),
+    NRequest = formalize_request(Method, BasePath, Request),
+    Worker =
+        case KeyOrNum of
+            undefined -> ehttpc_pool:pick_worker(PoolName);
+            _ -> ehttpc_pool:pick_worker(PoolName, KeyOrNum)
+        end,
+    ok = ehttpc:request_async(
+        Worker,
+        Method,
+        NRequest,
+        Timeout,
+        ReplyFun
+    ).
+
 on_get_status(_InstId, #{pool_name := PoolName, connect_timeout := Timeout} = State) ->
     case do_get_status(PoolName, Timeout) of
         true ->
@@ -343,7 +390,6 @@ do_get_status(PoolName, Timeout) ->
 %%--------------------------------------------------------------------
 %% Internal functions
 %%--------------------------------------------------------------------
-
 preprocess_request(undefined) ->
     undefined;
 preprocess_request(Req) when map_size(Req) == 0 ->

mix.exs

@@ -47,7 +47,7 @@ defmodule EMQXUmbrella.MixProject do
       {:lc, github: "emqx/lc", tag: "0.3.1"},
       {:redbug, "2.0.7"},
       {:typerefl, github: "ieQu1/typerefl", tag: "0.9.1", override: true},
-      {:ehttpc, github: "emqx/ehttpc", tag: "0.3.0", override: true},
+      {:ehttpc, github: "emqx/ehttpc", tag: "0.4.0", override: true},
       {:gproc, github: "uwiger/gproc", tag: "0.8.0", override: true},
       {:jiffy, github: "emqx/jiffy", tag: "1.0.5", override: true},
       {:cowboy, github: "emqx/cowboy", tag: "2.9.0", override: true},

rebar.config

@@ -49,7 +49,7 @@
     , {gpb, "4.11.2"} %% gpb only used to build, but not for release, pin it here to avoid fetching a wrong version due to rebar plugins scattered in all the deps
     , {typerefl, {git, "https://github.com/ieQu1/typerefl", {tag, "0.9.1"}}}
     , {gun, {git, "https://github.com/emqx/gun", {tag, "1.3.7"}}}
-    , {ehttpc, {git, "https://github.com/emqx/ehttpc", {tag, "0.3.0"}}}
+    , {ehttpc, {git, "https://github.com/emqx/ehttpc", {tag, "0.4.0"}}}
     , {gproc, {git, "https://github.com/uwiger/gproc", {tag, "0.8.0"}}}
     , {jiffy, {git, "https://github.com/emqx/jiffy", {tag, "1.0.5"}}}
     , {cowboy, {git, "https://github.com/emqx/cowboy", {tag, "2.9.0"}}}