7 let broker_id = ref None
8 let my_own_id = Hbugs_tutors_common.init_tutor ()
9 let my_own_addr, my_own_port = "127.0.0.1", 50011
10 let my_own_url = sprintf "%s:%d" my_own_addr my_own_port
12 let is_authenticated id =
15 | Some broker_id -> id = broker_id
17 (* thread who do the dirty work *)
18 let slave (state, musing_id) =
20 prerr_endline (sprintf "Hi, I'm the slave for musing %s" musing_id);
21 let (proof, goal) = Hbugs_tutors_common.load_state state in
24 let choose_must must only = (* euristic: use 2nd precision level
25 1st is more precise but is more slow *)
27 | [] -> raise Empty_must
32 TacticChaser.searchPattern
33 ~output_html:prerr_endline ~choose_must () ~status:(proof, goal)
38 Eureka (Hints (List.map (fun uri -> Use_apply_Luke uri) uris))
39 with Empty_must -> Sorry
41 let answer = Musing_completed (my_own_id, musing_id, hint) in
42 ignore (Hbugs_messages.submit_req ~url:Hbugs_tutors_common.broker_url answer);
44 (sprintf "Bye, I've completed my duties (success = %b)" (hint <> Sorry))
46 (Pxp_types.At _) as e ->
47 let rec unbox_exception =
49 Pxp_types.At (_,e) -> unbox_exception e
52 prerr_endline ("Uncaught PXP exception: " ^ Pxp_types.string_of_exn e) ;
53 (* e could be the Thread.exit exception; otherwise we will release an *)
54 (* uncaught exception and the Pxp_types.At was already an uncaught *)
55 (* exception ==> no additional arm *)
56 raise (unbox_exception e)
59 let ids = Hashtbl.create 17 in
61 prerr_endline "ignoring request from unauthorized broker";
62 Exception ("forbidden", "")
65 | Start_musing (broker_id, state) ->
66 if is_authenticated broker_id then begin
67 prerr_endline "received Start_musing";
68 let new_musing_id = Hbugs_id_generator.new_musing_id () in
69 let id = Hbugs_deity.create slave (state, new_musing_id) in
71 (sprintf "starting a new musing (tid = %d, id = %s)" id new_musing_id);
72 Hashtbl.add ids new_musing_id id ;
73 (*ignore (Thread.create slave (state, new_musing_id));*)
74 Musing_started (my_own_id, new_musing_id)
75 end else (* broker unauthorized *)
77 | Abort_musing (broker_id, musing_id) ->
78 prerr_endline "CSC: Abort_musing received" ;
79 if is_authenticated broker_id then begin
80 (* prerr_endline "Ignoring 'Abort_musing' message ..."; *)
82 Hbugs_deity.kill (Hashtbl.find ids musing_id) ;
83 Hashtbl.remove ids musing_id ;
86 | Hbugs_deity.Can_t_kill _ ->
87 prerr_endline ("Can not kill slave " ^ musing_id)) ;
88 Musing_aborted (my_own_id, musing_id)
89 end else (* broker unauthorized *)
92 Exception ("unexpected_msg",
93 Hbugs_messages.string_of_msg unexpected_msg)
95 let callback (req: Http_types.request) outchan =
97 let req_msg = Hbugs_messages.msg_of_string req#body in
98 let answer = hbugs_callback req_msg in
99 Http_daemon.respond ~body:(Hbugs_messages.string_of_msg answer) outchan
100 with Hbugs_messages.Parse_error (subj, reason) ->
102 ~body:(Hbugs_messages.string_of_msg
103 (Exception ("parse_error", reason)))
106 let postgresqlconnectionstring =
108 Sys.getenv "POSTGRESQL_CONNECTION_STRING"
110 Not_found -> "host=mowgli.cs.unibo.it dbname=helm_mowgli_new_schema user=helm"
115 Sys.catch_break true;
116 at_exit (fun () -> Hbugs_tutors_common.unregister_from_broker my_own_id);
118 Some (Hbugs_tutors_common.register_to_broker
119 my_own_id my_own_url "FOO" "Search_pattern_apply tutor");
120 Mqint.set_database Mqint.postgres_db ;
121 Mqint.init postgresqlconnectionstring ;
123 ~addr:my_own_addr ~port:my_own_port ~mode:`Thread callback;
125 with Sys.Break -> () (* exit nicely, invoking at_exit functions *)