I need to cache few values when the plsql procedure is called through a rest service multiple times i.e. when it is executed from a same user multiple times for optimization.

I am calling below package procedure through ORDS rest service.

Below is the package code.

create or replace
PACKAGE rest_api_cache
as
g_val number;
procedure g_proc (p_val in number,
                  p_found in out varchar2);
END rest_api_cache;


create or replace
PACKAGE BODY rest_api_cache
as
procedure g_proc (p_val in number,
                  p_found in out varchar2)
                  
is
l number;
begin
if rest_api_cache.g_val is null then
   rest_api_cache.g_val  := p_Val;
   p_found := 'FALSE';
else
  p_found := 'TRUE';
end if;
end g_proc;
END rest_api_cache;

---------------------------------
I have created the package as ORDS plsql procedure using below script

BEGIN
  ORDS.define_module(
    p_module_name    => 'testmodule6a',
    p_base_path      => 'testmodule6a/',
    p_items_per_page => 0);
  
  ORDS.define_template(
   p_module_name    => 'testmodule6a',
   p_pattern        => 'restcache');

  ORDS.define_handler(
    p_module_name    => 'testmodule6a',
    p_pattern        => 'restcache',
    p_method         => 'POST',
    p_source_type    => ORDS.source_type_plsql,
    p_source         => 'BEGIN
                           rest_api_cache.g_proc(
                             p_val      => :val,
                             p_found    => :found
                             );
                         END;',
    p_items_per_page => 0);

  ORDS.define_parameter(
    p_module_name        => 'testmodule6a',
    p_pattern            => 'restcache',
    p_method             => 'POST',
    p_name               => 'cachefound',
    p_bind_variable_name => 'found',
    p_source_type        => 'RESPONSE',
    p_param_type         => 'STRING',
    p_access_method      => 'OUT'
  );
  
  
  ORDS.define_parameter(
    p_module_name        => 'testmodule6a',
    p_pattern            => 'restcache',
    p_method             => 'POST',
    p_name               => 'p_value',
    p_bind_variable_name => 'val',
    p_source_type        => 'RESPONSE',
    p_param_type         => 'INT',
    p_access_method      => 'IN'
  );
  
  
  COMMIT;
END;
/

----------------------------------------------------
I am executing the procedure through rest service by

Creating a payload file out-param-payload.json with below input parameter to call the procedure
{ "val": 7499 }

Executed the procedure using below command

curl -i -X POST --data-binary @out-param-payload.json -H "Content-Type: application/json" http://localhost:8080/ords/testuser1/testmodule6a/restcache

Output of the above call is

HTTP/1.1 200 OK
Date: Tue, 05 Mar 2019 03:13:21 GMT
Content-Type: application/json
Transfer-Encoding: chunked

{"cachefound":"FALSE"}

For immediate execution from the same user, the value is returned as "FALSE" i.e. the package state is getting cleared, Is there a way that I can store the package variable for the same user for repeated executions.