最近開發 Erlang ,對其字符串處理能力無言至極,于是決定把它和python聯合起來,打造一個強力的分布式系統,等將來需要系統級開發時,我再把 C++/C組合進來.
首先參考了 Erlang 官方文檔和 http://blog.developers.api.sina.com.cn/?tag=erlang 以及 http://kazmier.net/computer/port-howto/ .
研讀了將近24個小時, 才終于完全把問題解決. 起名為town，town在英文里表示集市，也就是代表各種語言在這里的交流與互動。) )
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
-module(town).-behaviour(gen_server). %% API-export([start/0,combine/1]). %% gen_server callbacks-export([init/1, handle_call/3, handle_cast/2, handle_info/2,terminate/2, code_change/3]).-record(state, {port}). start() -> gen_server:start_link({global, ?MODULE}, ?MODULE, [], []).stop() -> gen_server:cast(?SERVER, stop).init([]) -> process_flag(trap_exit, true), Port = open_port({spawn, "python -u /home/freefis/Desktop/town.py"},[stream,{line, 1024}]), {ok, #state{port = Port}}. handle_call({combine,String}, _From, #state{port = Port} = State) -> port_command(Port,String), receive {Port,{data,{_Flag,Data}}} -> io:format("receiving:~p~n",[Data]), sleep(2000), {reply, Data, Port} end.handle_cast(stop, State) -> {stop, normal, State};handle_cast(_Msg, State) -> {noreply, State}. handle_info(Info, State) -> {noreply,State}. terminate(_Reason, Port) -> ok. code_change(_OldVsn, State, _Extra) -> {ok, State}. %%--------------------------------------------------------------------%%% Internal ---------------------------------------------------------combine(_String) -> start(), String = list_to_binary("combine|"++_String++"\n"), gen_server:call(?SERVER,{combine,String},infinity), stop(). |
這段是Python的腳本 當erlang中town:combine(“sentence1+sentence2”)執行時，會在后臺啟動python的腳本，處理完畢后返回給Erlang結果:sentence1sentence2，然后退出。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
import sysdef handle(_string): if _string.startswith("combine|"): string = "".join( _string[8:].split(",")) return string """waiting for input """while 1: # Recv. Binary Stream as Standard IN _stream = sys.stdin.readline() if not _stream: break # Scheme, Turn into Formal String inString = _stream.strip("\r\n") # handle String outString = handle(inString) # send to port as Standart OUT sys.stdout.write("%s\n" % (outString,)) sys.exit(0) |
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://coolshell.cn/articles/1313.html
