7 module MQI = MQueryInterpreter
10 let broker_id = ref None
11 let my_own_id = Hbugs_tutors_common.init_tutor ()
12 let my_own_addr, my_own_port = "127.0.0.1", 50011
13 let my_own_url = sprintf "%s:%d" my_own_addr my_own_port
14 let environment_file = "search_pattern_apply.environment"
15 let dump_environment_on_exit = false
17 let is_authenticated id =
20 | Some broker_id -> id = broker_id
22 (* thread who do the dirty work *)
23 let slave mqi_handle (state, musing_id) =
25 prerr_endline (sprintf "Hi, I'm the slave for musing %s" musing_id);
26 let (proof, goal) = Hbugs_tutors_common.load_state state in
29 let choose_must must only = (* euristic: use 2nd precision level
30 1st is more precise but is more slow *)
32 | [] -> raise Empty_must
37 TacticChaser.matchConclusion mqi_handle
38 ~output_html:prerr_endline ~choose_must () ~status:(proof, goal)
43 Eureka (Hints (List.map (fun uri -> Use_apply_Luke uri) uris))
44 with Empty_must -> Sorry
46 let answer = Musing_completed (my_own_id, musing_id, hint) in
47 ignore (Hbugs_messages.submit_req ~url:Hbugs_tutors_common.broker_url answer);
49 (sprintf "Bye, I've completed my duties (success = %b)" (hint <> Sorry))
51 (Pxp_types.At _) as e ->
52 let rec unbox_exception =
54 Pxp_types.At (_,e) -> unbox_exception e
57 prerr_endline ("Uncaught PXP exception: " ^ Pxp_types.string_of_exn e) ;
58 (* e could be the Thread.exit exception; otherwise we will release an *)
59 (* uncaught exception and the Pxp_types.At was already an uncaught *)
60 (* exception ==> no additional arm *)
61 raise (unbox_exception e)
63 let hbugs_callback mqi_handle =
64 let ids = Hashtbl.create 17 in
66 prerr_endline "ignoring request from unauthorized broker";
67 Exception ("forbidden", "")
70 | Start_musing (broker_id, state) ->
71 if is_authenticated broker_id then begin
72 prerr_endline "received Start_musing";
73 let new_musing_id = Hbugs_id_generator.new_musing_id () in
74 let id = Hbugs_deity.create (slave mqi_handle) (state, new_musing_id) in
76 (sprintf "starting a new musing (tid = %d, id = %s)" id new_musing_id);
77 Hashtbl.add ids new_musing_id id ;
78 (*ignore (Thread.create slave (state, new_musing_id));*)
79 Musing_started (my_own_id, new_musing_id)
80 end else (* broker unauthorized *)
82 | Abort_musing (broker_id, musing_id) ->
83 prerr_endline "CSC: Abort_musing received" ;
84 if is_authenticated broker_id then begin
85 (* prerr_endline "Ignoring 'Abort_musing' message ..."; *)
87 Hbugs_deity.kill (Hashtbl.find ids musing_id) ;
88 Hashtbl.remove ids musing_id ;
91 | Hbugs_deity.Can_t_kill _ ->
92 prerr_endline ("Can not kill slave " ^ musing_id)) ;
93 Musing_aborted (my_own_id, musing_id)
94 end else (* broker unauthorized *)
97 Exception ("unexpected_msg",
98 Hbugs_messages.string_of_msg unexpected_msg)
100 let callback mqi_handle (req: Http_types.request) outchan =
102 let req_msg = Hbugs_messages.msg_of_string req#body in
103 let answer = hbugs_callback mqi_handle req_msg in
104 Http_daemon.respond ~body:(Hbugs_messages.string_of_msg answer) outchan
105 with Hbugs_messages.Parse_error (subj, reason) ->
107 ~body:(Hbugs_messages.string_of_msg
108 (Exception ("parse_error", reason)))
111 let restore_environment () =
112 let ic = open_in environment_file in
113 prerr_endline "Restoring environment ...";
114 CicEnvironment.restore_from_channel
115 ~callback:(fun uri -> prerr_endline uri) ic;
116 prerr_endline "... done!";
119 let dump_environment () =
120 let oc = open_out environment_file in
121 prerr_endline "Dumping environment ...";
122 CicEnvironment.dump_to_channel
123 ~callback:(fun uri -> prerr_endline uri) oc;
124 prerr_endline "... done!";
128 let mqi_flags = [] in (* default MathQL interpreter options *)
130 Sys.catch_break true;
132 if dump_environment_on_exit then
134 Hbugs_tutors_common.unregister_from_broker my_own_id);
136 Some (Hbugs_tutors_common.register_to_broker
137 my_own_id my_own_url "FOO" "Search_pattern_apply tutor");
138 let mqi_handle = MQIC.init mqi_flags prerr_string in
139 if Sys.file_exists environment_file then
140 restore_environment ();
142 ~addr:my_own_addr ~port:my_own_port ~mode:`Thread (callback mqi_handle);
143 MQIC.close mqi_handle
144 with Sys.Break -> () (* exit nicely, invoking at_exit functions *)