[Erlang] decrease memory usage (#9946)

* do not keep generator_state in cowboy match structure

* update generated example

modules/openapi-generator/src/main/resources/erlang-server/handler.mustache

@@ -29,10 +29,12 @@
 -spec init(Req :: cowboy_req:req(), Opts :: {{packageName}}_router:init_opts()) ->
     {cowboy_rest, Req :: cowboy_req:req(), State :: state()}.
 
-init(Req, {Operations, LogicHandler, ValidatorState}) ->
+init(Req, {Operations, LogicHandler, ValidatorMod}) ->
     Method = cowboy_req:method(Req),
     OperationID = maps:get(Method, Operations, undefined),
 
+    ValidatorState = ValidatorMod:get_validator_state(),
+
     error_logger:info_msg("Attempt to process operation: ~p", [OperationID]),
 
     State = #state{

modules/openapi-generator/src/main/resources/erlang-server/router.mustache

@@ -1,6 +1,6 @@
 -module({{packageName}}_router).
 
--export([get_paths/1]).
+-export([get_paths/1, get_validator_state/0]).
 
 -type operations() :: #{
     Method :: binary() => {{packageName}}_api:operation_id()
@@ -62,9 +62,15 @@ get_operations() ->
         }{{^-last}},{{/-last}}{{/operation}}{{^-last}},{{/-last}}{{/operations}}{{/apis}}{{/apiInfo}}
     }.
 
+get_validator_state() ->
+    persistent_term:get({?MODULE, validator_state}).
+
+
 prepare_validator() ->
     R = jsx:decode(element(2, file:read_file(get_openapi_path()))),
-    jesse_state:new(R, [{default_schema_ver, <<"http://json-schema.org/draft-04/schema#">>}]).
+    JesseState = jesse_state:new(R, [{default_schema_ver, <<"http://json-schema.org/draft-04/schema#">>}]),
+    persistent_term:put({?MODULE, validator_state}, JesseState),
+    ?MODULE.
 
 
 get_openapi_path() ->

samples/server/petstore/erlang-server/src/openapi_pet_handler.erl

@@ -29,10 +29,12 @@
 -spec init(Req :: cowboy_req:req(), Opts :: openapi_router:init_opts()) ->
     {cowboy_rest, Req :: cowboy_req:req(), State :: state()}.
 
-init(Req, {Operations, LogicHandler, ValidatorState}) ->
+init(Req, {Operations, LogicHandler, ValidatorMod}) ->
     Method = cowboy_req:method(Req),
     OperationID = maps:get(Method, Operations, undefined),
 
+    ValidatorState = ValidatorMod:get_validator_state(),
+
     error_logger:info_msg("Attempt to process operation: ~p", [OperationID]),
 
     State = #state{

samples/server/petstore/erlang-server/src/openapi_router.erl

@@ -1,6 +1,6 @@
 -module(openapi_router).
 
--export([get_paths/1]).
+-export([get_paths/1, get_validator_state/0]).
 
 -type operations() :: #{
     Method :: binary() => openapi_api:operation_id()
@@ -157,9 +157,15 @@ get_operations() ->
         }
     }.
 
+get_validator_state() ->
+    persistent_term:get({?MODULE, validator_state}).
+
+
 prepare_validator() ->
     R = jsx:decode(element(2, file:read_file(get_openapi_path()))),
-    jesse_state:new(R, [{default_schema_ver, <<"http://json-schema.org/draft-04/schema#">>}]).
+    JesseState = jesse_state:new(R, [{default_schema_ver, <<"http://json-schema.org/draft-04/schema#">>}]),
+    persistent_term:put({?MODULE, validator_state}, JesseState),
+    ?MODULE.
 
 
 get_openapi_path() ->

samples/server/petstore/erlang-server/src/openapi_store_handler.erl

@@ -29,10 +29,12 @@
 -spec init(Req :: cowboy_req:req(), Opts :: openapi_router:init_opts()) ->
     {cowboy_rest, Req :: cowboy_req:req(), State :: state()}.
 
-init(Req, {Operations, LogicHandler, ValidatorState}) ->
+init(Req, {Operations, LogicHandler, ValidatorMod}) ->
     Method = cowboy_req:method(Req),
     OperationID = maps:get(Method, Operations, undefined),
 
+    ValidatorState = ValidatorMod:get_validator_state(),
+
     error_logger:info_msg("Attempt to process operation: ~p", [OperationID]),
 
     State = #state{

samples/server/petstore/erlang-server/src/openapi_user_handler.erl

@@ -29,10 +29,12 @@
 -spec init(Req :: cowboy_req:req(), Opts :: openapi_router:init_opts()) ->
     {cowboy_rest, Req :: cowboy_req:req(), State :: state()}.
 
-init(Req, {Operations, LogicHandler, ValidatorState}) ->
+init(Req, {Operations, LogicHandler, ValidatorMod}) ->
     Method = cowboy_req:method(Req),
     OperationID = maps:get(Method, Operations, undefined),
 
+    ValidatorState = ValidatorMod:get_validator_state(),
+
     error_logger:info_msg("Attempt to process operation: ~p", [OperationID]),
 
     State = #state{