Source

core hello world / common.ml

Yaron Minsky 5b67326 


Yaron Minsky 1fd795b 

Yaron Minsky 895887c 
Yaron Minsky 1fd795b 








Yaron Minsky 5b67326 






Yaron Minsky 31415b8 

Yaron Minsky 5b67326 
Yaron Minsky 67d10bf 
Yaron Minsky a86abec 
Yaron Minsky 4d862d0 
Yaron Minsky 1fd795b 
Yaron Minsky 895887c 


Yaron Minsky 1fd795b 
Yaron Minsky 895887c 














open Core.Std
open Async.Std

let port_arg () =
  Command.Spec.(
    flag "-port" (optional_with_default 8124 int)
      ~doc:" Broker's port"
  )

let host_arg () =
  Command.Spec.(
    flag "-hostname" (optional_with_default "127.0.0.1" string)
      ~doc:" Broker's hostname"
  )

let with_rpc_conn f ~host ~port =
  Tcp.with_connection
    (Tcp.to_host_and_port host port)
    ~timeout:(sec 1.)
    (fun r w ->
      Rpc.Connection.create r w ~connection_state:()
      >>= function
      | Error exn -> raise exn
      | Ok conn   -> f conn
    )

let start_server ~env ?(stop=Deferred.never ()) ~implementations ~port () =
  Log.Global.info "starting server on %d" port;
  let implementations =
    Rpc.Implementations.create_exn ~implementations
      ~on_unknown_rpc:(`Call (fun ~rpc_tag ~version ->
        Log.Global.info "Unexpected RPC, tag %s, version %d" rpc_tag version))
  in
  Log.Global.info "About to start TCP server";
  Tcp.Server.create
    ~on_handler_error:(`Call (fun _ exn -> Log.Global.sexp exn Exn.sexp_of_t))
    (Tcp.on_port port)
    (fun _addr r w ->
      Rpc.Connection.server_with_close r w
        ~connection_state:env
        ~on_handshake_error:(
          `Call (fun exn -> Log.Global.sexp exn Exn.sexp_of_t; return ()))
        ~implementations
    )
  >>= fun server ->
  Log.Global.info "TCP server started, waiting for close";
  Deferred.any
    [ (stop >>= fun () -> Tcp.Server.close server)
    ; Tcp.Server.close_finished server ]
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