[central-exchange] very simple implementation using nanomsg

bin/gargantext-central-exchange/Main.hs

+{-|
+Module      : Main.hs
+Description : Gargantext central exchange for async notifications
+Copyright   : (c) CNRS, 2017-Present
+License     : AGPL + CECILL v3
+Maintainer  : team@gargantext.org
+Stability   : experimental
+Portability : POSIX
+
+ -}
+
+{-# LANGUAGE Strict            #-}
+
+module Main where
+
+import Control.Concurrent (threadDelay)
+import Control.Monad (join, mapM_)
+import Data.ByteString.Char8 qualified as C
+import Data.Text qualified as T
+import Gargantext.Prelude
+import Nanomsg
+import Options.Applicative
+
+
+data Command =
+    Server
+  | Client
+
+parser :: Parser (IO ())
+parser = subparser
+    ( command "server" (info (pure gServer) idm)
+   <> command "client" (info (pure gClient) idm) )
+
+   
+main :: IO ()
+main = join $ execParser (info parser idm)
+
+gClient :: IO ()
+gClient = do
+    withSocket Push $ \s -> do
+      _ <- connect s "tcp://localhost:5560"
+      let str = C.unwords (take 1000 $ repeat "hello")
+      C.putStrLn $ C.pack "sending: " <> (C.take 100 str)
+      replicateM_ 100 $
+        send s str
+    
+gServer :: IO ()
+gServer = do
+    withSocket Pull $ \s -> do
+      _ <- bind s "tcp://*:5560"
+      forever $ do
+        putText "receiving"
+        r <- recv s
+        C.putStrLn $ C.take 100 r
+        -- r <- recv' s
+        -- -- putText $ T.pack $ C.unpack r
+        -- putText "..."
+        -- case r of
+        --   Nothing -> pure ()
+        --   Just r' -> C.putStrLn $ C.take 100 r'
+        -- threadDelay 1000000
+    -- withSocket Pub $ \s -> do
+    --     _ <- bind s "tcp://*:5560"
+    --     mapM_ (\num -> sendNumber s num) (cycle [1..1000000 :: Int])
+    -- where
+    --     sendNumber s number = do
+    --         threadDelay 1000        -- let's conserve some cycles
+    --         let numAsString = show number
+    --         send s (C.pack numAsString)
+

cabal.project

@@ -165,7 +165,17 @@ source-repository-package
     type: git
     location: https://github.com/robstewart57/rdf4h.git
     tag: 4fd2edf30c141600ffad6d730cc4c1c08a6dbce4
+
+source-repository-package
+    type: git
+    location: https://github.com/garganscript/nanomsg-haskell
+    tag: 5e4e119881d81b8a8f77a79b3caaebb1bb304790
     
+-- source-repository-package
+--     type: git
+--     location: https://github.com/jimenezrick/nng-haskell
+--     tag: 31e52d7bc720e5fb9daf1c1e8bc1fd156d577af2
+        
 allow-older: *
 allow-newer: *
 

gargantext.cabal

@@ -848,6 +848,27 @@ executable gargantext-upgrade
     , gargantext-prelude
     , postgresql-simple ^>= 0.6.4
     , text ^>= 1.2.4.1
+    
+executable gargantext-central-exchange
+  import:
+      defaults
+  main-is: Main.hs
+  other-modules:
+      Paths_gargantext
+  hs-source-dirs:
+      bin/gargantext-central-exchange
+  build-depends:
+      bytestring ^>= 0.10.12.0
+    , gargantext
+    , gargantext-prelude
+    , nanomsg-haskell >= 0.2.4 && < 0.3
+    -- , nng-haskell
+    , optparse-applicative >= 0.18.1.0 && < 0.19
+    , optparse-generic ^>= 1.4.7
+    , postgresql-simple ^>= 0.6.4
+    , text ^>= 1.2.4.1
+    , unordered-containers ^>= 0.2.16.0
+    , vector ^>= 0.7.3
 
 test-suite garg-test-tasty
   import:

nix/pkgs.nix

@@ -33,6 +33,10 @@ rec {
                           ];
                 });
 
+  # nng180 = pkgs.nng.overrideAttrs (new: old: rec {
+  #   version = "1.8.0";
+  # });
+  
   igraph_0_10_4 = pkgs.igraph.overrideAttrs (finalAttrs: previousAttrs: {
     version = "0.10.4";
 
@@ -125,6 +129,8 @@ rec {
     igraph_0_10_4
     libpqxx
     libsodium
+    nanomsg
+    # nng180
     zeromq
     curl
   ] ++ ( lib.optionals stdenv.isDarwin [

src/Gargantext/Core/AsyncUpdates.hs

@@ -8,6 +8,8 @@ Stability   : experimental
 Portability : POSIX
 -}
 
+{-# OPTIONS_GHC -Wno-deprecations #-} -- FIXME(cgenie) undefined remains in code
+
 module Gargantext.Core.AsyncUpdates
 where