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@@ -0,0 +1,22 b'' | |||
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1 | import __builtin__ | |
|
2 | ||
|
3 | from session import extract_header | |
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4 | ||
|
5 | class DisplayHook(object): | |
|
6 | ||
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7 | def __init__(self, session, pub_socket): | |
|
8 | self.session = session | |
|
9 | self.pub_socket = pub_socket | |
|
10 | self.parent_header = {} | |
|
11 | ||
|
12 | def __call__(self, obj): | |
|
13 | if obj is None: | |
|
14 | return | |
|
15 | ||
|
16 | __builtin__._ = obj | |
|
17 | msg = self.session.msg(u'pyout', {u'data':repr(obj)}, | |
|
18 | parent=self.parent_header) | |
|
19 | self.pub_socket.send_json(msg) | |
|
20 | ||
|
21 | def set_parent(self, parent): | |
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22 | self.parent_header = extract_header(parent) No newline at end of file |
@@ -0,0 +1,42 b'' | |||
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1 | import os | |
|
2 | import time | |
|
3 | from threading import Thread | |
|
4 | ||
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5 | ||
|
6 | class ExitPollerUnix(Thread): | |
|
7 | """ A Unix-specific daemon thread that terminates the program immediately | |
|
8 | when the parent process no longer exists. | |
|
9 | """ | |
|
10 | ||
|
11 | def __init__(self): | |
|
12 | super(ExitPollerUnix, self).__init__() | |
|
13 | self.daemon = True | |
|
14 | ||
|
15 | def run(self): | |
|
16 | # We cannot use os.waitpid because it works only for child processes. | |
|
17 | from errno import EINTR | |
|
18 | while True: | |
|
19 | try: | |
|
20 | if os.getppid() == 1: | |
|
21 | os._exit(1) | |
|
22 | time.sleep(1.0) | |
|
23 | except OSError, e: | |
|
24 | if e.errno == EINTR: | |
|
25 | continue | |
|
26 | raise | |
|
27 | ||
|
28 | class ExitPollerWindows(Thread): | |
|
29 | """ A Windows-specific daemon thread that terminates the program immediately | |
|
30 | when a Win32 handle is signaled. | |
|
31 | """ | |
|
32 | ||
|
33 | def __init__(self, handle): | |
|
34 | super(ExitPollerWindows, self).__init__() | |
|
35 | self.daemon = True | |
|
36 | self.handle = handle | |
|
37 | ||
|
38 | def run(self): | |
|
39 | from _subprocess import WaitForSingleObject, WAIT_OBJECT_0, INFINITE | |
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40 | result = WaitForSingleObject(self.handle, INFINITE) | |
|
41 | if result == WAIT_OBJECT_0: | |
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42 | os._exit(1) No newline at end of file |
@@ -0,0 +1,77 b'' | |||
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1 | import sys | |
|
2 | import time | |
|
3 | from cStringIO import StringIO | |
|
4 | ||
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5 | from session import extract_header, Message | |
|
6 | ||
|
7 | #----------------------------------------------------------------------------- | |
|
8 | # Stream classes | |
|
9 | #----------------------------------------------------------------------------- | |
|
10 | ||
|
11 | class OutStream(object): | |
|
12 | """A file like object that publishes the stream to a 0MQ PUB socket.""" | |
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13 | ||
|
14 | # The time interval between automatic flushes, in seconds. | |
|
15 | flush_interval = 0.05 | |
|
16 | ||
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17 | def __init__(self, session, pub_socket, name): | |
|
18 | self.session = session | |
|
19 | self.pub_socket = pub_socket | |
|
20 | self.name = name | |
|
21 | self.parent_header = {} | |
|
22 | self._new_buffer() | |
|
23 | ||
|
24 | def set_parent(self, parent): | |
|
25 | self.parent_header = extract_header(parent) | |
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26 | ||
|
27 | def close(self): | |
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28 | self.pub_socket = None | |
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29 | ||
|
30 | def flush(self): | |
|
31 | if self.pub_socket is None: | |
|
32 | raise ValueError(u'I/O operation on closed file') | |
|
33 | else: | |
|
34 | data = self._buffer.getvalue() | |
|
35 | if data: | |
|
36 | content = {u'name':self.name, u'data':data} | |
|
37 | msg = self.session.msg(u'stream', content=content, | |
|
38 | parent=self.parent_header) | |
|
39 | print>>sys.__stdout__, Message(msg) | |
|
40 | self.pub_socket.send_json(msg) | |
|
41 | ||
|
42 | self._buffer.close() | |
|
43 | self._new_buffer() | |
|
44 | ||
|
45 | def isatty(self): | |
|
46 | return False | |
|
47 | ||
|
48 | def next(self): | |
|
49 | raise IOError('Read not supported on a write only stream.') | |
|
50 | ||
|
51 | def read(self, size=-1): | |
|
52 | raise IOError('Read not supported on a write only stream.') | |
|
53 | ||
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54 | def readline(self, size=-1): | |
|
55 | raise IOError('Read not supported on a write only stream.') | |
|
56 | ||
|
57 | def write(self, string): | |
|
58 | if self.pub_socket is None: | |
|
59 | raise ValueError('I/O operation on closed file') | |
|
60 | else: | |
|
61 | self._buffer.write(string) | |
|
62 | current_time = time.time() | |
|
63 | if self._start <= 0: | |
|
64 | self._start = current_time | |
|
65 | elif current_time - self._start > self.flush_interval: | |
|
66 | self.flush() | |
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67 | ||
|
68 | def writelines(self, sequence): | |
|
69 | if self.pub_socket is None: | |
|
70 | raise ValueError('I/O operation on closed file') | |
|
71 | else: | |
|
72 | for string in sequence: | |
|
73 | self.write(string) | |
|
74 | ||
|
75 | def _new_buffer(self): | |
|
76 | self._buffer = StringIO() | |
|
77 | self._start = -1 No newline at end of file |
@@ -1,488 +1,359 b'' | |||
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1 | 1 | #!/usr/bin/env python |
|
2 | 2 | """A simple interactive kernel that talks to a frontend over 0MQ. |
|
3 | 3 | |
|
4 | 4 | Things to do: |
|
5 | 5 | |
|
6 | * Finish implementing `raw_input`. | |
|
7 | 6 | * Implement `set_parent` logic. Right before doing exec, the Kernel should |
|
8 | 7 | call set_parent on all the PUB objects with the message about to be executed. |
|
9 | 8 | * Implement random port and security key logic. |
|
10 | 9 | * Implement control messages. |
|
11 | 10 | * Implement event loop and poll version. |
|
12 | 11 | """ |
|
13 | 12 | |
|
14 | 13 | #----------------------------------------------------------------------------- |
|
15 | 14 | # Imports |
|
16 | 15 | #----------------------------------------------------------------------------- |
|
17 | 16 | |
|
18 | 17 | # Standard library imports. |
|
19 | 18 | import __builtin__ |
|
20 | 19 | from code import CommandCompiler |
|
21 | from cStringIO import StringIO | |
|
22 | 20 | import os |
|
23 | 21 | import sys |
|
24 | from threading import Thread | |
|
25 | 22 | import time |
|
26 | 23 | import traceback |
|
27 | 24 | |
|
28 | 25 | # System library imports. |
|
29 | 26 | import zmq |
|
30 | 27 | |
|
31 | 28 | # Local imports. |
|
32 | 29 | from IPython.external.argparse import ArgumentParser |
|
33 |
from session import Session, Message |
|
|
30 | from session import Session, Message | |
|
34 | 31 | from completer import KernelCompleter |
|
32 | from .iostream import OutStream | |
|
33 | from .displayhook import DisplayHook | |
|
34 | from .exitpoller import ExitPollerUnix, ExitPollerWindows | |
|
35 | 35 | |
|
36 | 36 | #----------------------------------------------------------------------------- |
|
37 | # Kernel and stream classes | |
|
37 | # Main kernel class | |
|
38 | 38 | #----------------------------------------------------------------------------- |
|
39 | 39 | |
|
40 | class OutStream(object): | |
|
41 | """A file like object that publishes the stream to a 0MQ PUB socket.""" | |
|
42 | ||
|
43 | # The time interval between automatic flushes, in seconds. | |
|
44 | flush_interval = 0.05 | |
|
45 | ||
|
46 | def __init__(self, session, pub_socket, name): | |
|
47 | self.session = session | |
|
48 | self.pub_socket = pub_socket | |
|
49 | self.name = name | |
|
50 | self.parent_header = {} | |
|
51 | self._new_buffer() | |
|
52 | ||
|
53 | def set_parent(self, parent): | |
|
54 | self.parent_header = extract_header(parent) | |
|
55 | ||
|
56 | def close(self): | |
|
57 | self.pub_socket = None | |
|
58 | ||
|
59 | def flush(self): | |
|
60 | if self.pub_socket is None: | |
|
61 | raise ValueError(u'I/O operation on closed file') | |
|
62 | else: | |
|
63 | data = self._buffer.getvalue() | |
|
64 | if data: | |
|
65 | content = {u'name':self.name, u'data':data} | |
|
66 | msg = self.session.msg(u'stream', content=content, | |
|
67 | parent=self.parent_header) | |
|
68 | print>>sys.__stdout__, Message(msg) | |
|
69 | self.pub_socket.send_json(msg) | |
|
70 | ||
|
71 | self._buffer.close() | |
|
72 | self._new_buffer() | |
|
73 | ||
|
74 | def isatty(self): | |
|
75 | return False | |
|
76 | ||
|
77 | def next(self): | |
|
78 | raise IOError('Read not supported on a write only stream.') | |
|
79 | ||
|
80 | def read(self, size=-1): | |
|
81 | raise IOError('Read not supported on a write only stream.') | |
|
82 | ||
|
83 | def readline(self, size=-1): | |
|
84 | raise IOError('Read not supported on a write only stream.') | |
|
85 | ||
|
86 | def write(self, string): | |
|
87 | if self.pub_socket is None: | |
|
88 | raise ValueError('I/O operation on closed file') | |
|
89 | else: | |
|
90 | self._buffer.write(string) | |
|
91 | current_time = time.time() | |
|
92 | if self._start <= 0: | |
|
93 | self._start = current_time | |
|
94 | elif current_time - self._start > self.flush_interval: | |
|
95 | self.flush() | |
|
96 | ||
|
97 | def writelines(self, sequence): | |
|
98 | if self.pub_socket is None: | |
|
99 | raise ValueError('I/O operation on closed file') | |
|
100 | else: | |
|
101 | for string in sequence: | |
|
102 | self.write(string) | |
|
103 | ||
|
104 | def _new_buffer(self): | |
|
105 | self._buffer = StringIO() | |
|
106 | self._start = -1 | |
|
107 | ||
|
108 | ||
|
109 | class DisplayHook(object): | |
|
110 | ||
|
111 | def __init__(self, session, pub_socket): | |
|
112 | self.session = session | |
|
113 | self.pub_socket = pub_socket | |
|
114 | self.parent_header = {} | |
|
115 | ||
|
116 | def __call__(self, obj): | |
|
117 | if obj is None: | |
|
118 | return | |
|
119 | ||
|
120 | __builtin__._ = obj | |
|
121 | msg = self.session.msg(u'pyout', {u'data':repr(obj)}, | |
|
122 | parent=self.parent_header) | |
|
123 | self.pub_socket.send_json(msg) | |
|
124 | ||
|
125 | def set_parent(self, parent): | |
|
126 | self.parent_header = extract_header(parent) | |
|
127 | ||
|
128 | ||
|
129 | 40 | class Kernel(object): |
|
130 | 41 | |
|
131 | 42 | def __init__(self, session, reply_socket, pub_socket, req_socket): |
|
132 | 43 | self.session = session |
|
133 | 44 | self.reply_socket = reply_socket |
|
134 | 45 | self.pub_socket = pub_socket |
|
135 | 46 | self.req_socket = req_socket |
|
136 | 47 | self.user_ns = {} |
|
137 | 48 | self.history = [] |
|
138 | 49 | self.compiler = CommandCompiler() |
|
139 | 50 | self.completer = KernelCompleter(self.user_ns) |
|
140 | 51 | |
|
141 | 52 | # Build dict of handlers for message types |
|
142 | 53 | msg_types = [ 'execute_request', 'complete_request', |
|
143 | 54 | 'object_info_request' ] |
|
144 | 55 | self.handlers = {} |
|
145 | 56 | for msg_type in msg_types: |
|
146 | 57 | self.handlers[msg_type] = getattr(self, msg_type) |
|
147 | 58 | |
|
148 | 59 | def abort_queue(self): |
|
149 | 60 | while True: |
|
150 | 61 | try: |
|
151 | 62 | ident = self.reply_socket.recv(zmq.NOBLOCK) |
|
152 | 63 | except zmq.ZMQError, e: |
|
153 | 64 | if e.errno == zmq.EAGAIN: |
|
154 | 65 | break |
|
155 | 66 | else: |
|
156 | 67 | assert self.reply_socket.rcvmore(), "Unexpected missing message part." |
|
157 | 68 | msg = self.reply_socket.recv_json() |
|
158 | 69 | print>>sys.__stdout__, "Aborting:" |
|
159 | 70 | print>>sys.__stdout__, Message(msg) |
|
160 | 71 | msg_type = msg['msg_type'] |
|
161 | 72 | reply_type = msg_type.split('_')[0] + '_reply' |
|
162 | 73 | reply_msg = self.session.msg(reply_type, {'status' : 'aborted'}, msg) |
|
163 | 74 | print>>sys.__stdout__, Message(reply_msg) |
|
164 | 75 | self.reply_socket.send(ident,zmq.SNDMORE) |
|
165 | 76 | self.reply_socket.send_json(reply_msg) |
|
166 | 77 | # We need to wait a bit for requests to come in. This can probably |
|
167 | 78 | # be set shorter for true asynchronous clients. |
|
168 | 79 | time.sleep(0.1) |
|
169 | 80 | |
|
170 | 81 | def execute_request(self, ident, parent): |
|
171 | 82 | try: |
|
172 | 83 | code = parent[u'content'][u'code'] |
|
173 | 84 | except: |
|
174 | 85 | print>>sys.__stderr__, "Got bad msg: " |
|
175 | 86 | print>>sys.__stderr__, Message(parent) |
|
176 | 87 | return |
|
177 | 88 | pyin_msg = self.session.msg(u'pyin',{u'code':code}, parent=parent) |
|
178 | 89 | self.pub_socket.send_json(pyin_msg) |
|
179 | 90 | |
|
180 | 91 | try: |
|
181 | 92 | comp_code = self.compiler(code, '<zmq-kernel>') |
|
182 | 93 | |
|
183 | 94 | # Replace raw_input. Note that is not sufficient to replace |
|
184 | 95 | # raw_input in the user namespace. |
|
185 | 96 | raw_input = lambda prompt='': self.raw_input(prompt, ident, parent) |
|
186 | 97 | __builtin__.raw_input = raw_input |
|
187 | 98 | |
|
188 | 99 | # Configure the display hook. |
|
189 | 100 | sys.displayhook.set_parent(parent) |
|
190 | 101 | |
|
191 | 102 | exec comp_code in self.user_ns, self.user_ns |
|
192 | 103 | except: |
|
193 | result = u'error' | |
|
194 | 104 | etype, evalue, tb = sys.exc_info() |
|
195 | 105 | tb = traceback.format_exception(etype, evalue, tb) |
|
196 | 106 | exc_content = { |
|
197 | 107 | u'status' : u'error', |
|
198 | 108 | u'traceback' : tb, |
|
199 | 109 | u'ename' : unicode(etype.__name__), |
|
200 | 110 | u'evalue' : unicode(evalue) |
|
201 | 111 | } |
|
202 | 112 | exc_msg = self.session.msg(u'pyerr', exc_content, parent) |
|
203 | 113 | self.pub_socket.send_json(exc_msg) |
|
204 | 114 | reply_content = exc_content |
|
205 | 115 | else: |
|
206 | 116 | reply_content = {'status' : 'ok'} |
|
207 | 117 | |
|
208 | 118 | # Flush output before sending the reply. |
|
209 | 119 | sys.stderr.flush() |
|
210 | 120 | sys.stdout.flush() |
|
211 | 121 | |
|
212 | 122 | # Send the reply. |
|
213 | 123 | reply_msg = self.session.msg(u'execute_reply', reply_content, parent) |
|
214 | 124 | print>>sys.__stdout__, Message(reply_msg) |
|
215 | 125 | self.reply_socket.send(ident, zmq.SNDMORE) |
|
216 | 126 | self.reply_socket.send_json(reply_msg) |
|
217 | 127 | if reply_msg['content']['status'] == u'error': |
|
218 | 128 | self.abort_queue() |
|
219 | 129 | |
|
220 | 130 | def raw_input(self, prompt, ident, parent): |
|
221 | 131 | # Flush output before making the request. |
|
222 | 132 | sys.stderr.flush() |
|
223 | 133 | sys.stdout.flush() |
|
224 | 134 | |
|
225 | 135 | # Send the input request. |
|
226 | 136 | content = dict(prompt=prompt) |
|
227 | 137 | msg = self.session.msg(u'input_request', content, parent) |
|
228 | 138 | self.req_socket.send_json(msg) |
|
229 | 139 | |
|
230 | 140 | # Await a response. |
|
231 | 141 | reply = self.req_socket.recv_json() |
|
232 | 142 | try: |
|
233 | 143 | value = reply['content']['value'] |
|
234 | 144 | except: |
|
235 | 145 | print>>sys.__stderr__, "Got bad raw_input reply: " |
|
236 | 146 | print>>sys.__stderr__, Message(parent) |
|
237 | 147 | value = '' |
|
238 | 148 | return value |
|
239 | 149 | |
|
240 | 150 | def complete_request(self, ident, parent): |
|
241 | 151 | matches = {'matches' : self.complete(parent), |
|
242 | 152 | 'status' : 'ok'} |
|
243 | 153 | completion_msg = self.session.send(self.reply_socket, 'complete_reply', |
|
244 | 154 | matches, parent, ident) |
|
245 | 155 | print >> sys.__stdout__, completion_msg |
|
246 | 156 | |
|
247 | 157 | def complete(self, msg): |
|
248 | 158 | return self.completer.complete(msg.content.line, msg.content.text) |
|
249 | 159 | |
|
250 | 160 | def object_info_request(self, ident, parent): |
|
251 | 161 | context = parent['content']['oname'].split('.') |
|
252 | 162 | object_info = self.object_info(context) |
|
253 | 163 | msg = self.session.send(self.reply_socket, 'object_info_reply', |
|
254 | 164 | object_info, parent, ident) |
|
255 | 165 | print >> sys.__stdout__, msg |
|
256 | 166 | |
|
257 | 167 | def object_info(self, context): |
|
258 | 168 | symbol, leftover = self.symbol_from_context(context) |
|
259 | 169 | if symbol is not None and not leftover: |
|
260 | 170 | doc = getattr(symbol, '__doc__', '') |
|
261 | 171 | else: |
|
262 | 172 | doc = '' |
|
263 | 173 | object_info = dict(docstring = doc) |
|
264 | 174 | return object_info |
|
265 | 175 | |
|
266 | 176 | def symbol_from_context(self, context): |
|
267 | 177 | if not context: |
|
268 | 178 | return None, context |
|
269 | 179 | |
|
270 | 180 | base_symbol_string = context[0] |
|
271 | 181 | symbol = self.user_ns.get(base_symbol_string, None) |
|
272 | 182 | if symbol is None: |
|
273 | 183 | symbol = __builtin__.__dict__.get(base_symbol_string, None) |
|
274 | 184 | if symbol is None: |
|
275 | 185 | return None, context |
|
276 | 186 | |
|
277 | 187 | context = context[1:] |
|
278 | 188 | for i, name in enumerate(context): |
|
279 | 189 | new_symbol = getattr(symbol, name, None) |
|
280 | 190 | if new_symbol is None: |
|
281 | 191 | return symbol, context[i:] |
|
282 | 192 | else: |
|
283 | 193 | symbol = new_symbol |
|
284 | 194 | |
|
285 | 195 | return symbol, [] |
|
286 | 196 | |
|
287 | 197 | def start(self): |
|
288 | 198 | while True: |
|
289 | 199 | ident = self.reply_socket.recv() |
|
290 | 200 | assert self.reply_socket.rcvmore(), "Missing message part." |
|
291 | 201 | msg = self.reply_socket.recv_json() |
|
292 | 202 | omsg = Message(msg) |
|
293 | 203 | print>>sys.__stdout__ |
|
294 | 204 | print>>sys.__stdout__, omsg |
|
295 | 205 | handler = self.handlers.get(omsg.msg_type, None) |
|
296 | 206 | if handler is None: |
|
297 | 207 | print >> sys.__stderr__, "UNKNOWN MESSAGE TYPE:", omsg |
|
298 | 208 | else: |
|
299 | 209 | handler(ident, omsg) |
|
300 | 210 | |
|
301 | 211 | #----------------------------------------------------------------------------- |
|
302 | 212 | # Kernel main and launch functions |
|
303 | 213 | #----------------------------------------------------------------------------- |
|
304 | 214 | |
|
305 | class ExitPollerUnix(Thread): | |
|
306 | """ A Unix-specific daemon thread that terminates the program immediately | |
|
307 | when the parent process no longer exists. | |
|
308 | """ | |
|
309 | ||
|
310 | def __init__(self): | |
|
311 | super(ExitPollerUnix, self).__init__() | |
|
312 | self.daemon = True | |
|
313 | ||
|
314 | def run(self): | |
|
315 | # We cannot use os.waitpid because it works only for child processes. | |
|
316 | from errno import EINTR | |
|
317 | while True: | |
|
318 | try: | |
|
319 | if os.getppid() == 1: | |
|
320 | os._exit(1) | |
|
321 | time.sleep(1.0) | |
|
322 | except OSError, e: | |
|
323 | if e.errno == EINTR: | |
|
324 | continue | |
|
325 | raise | |
|
326 | ||
|
327 | class ExitPollerWindows(Thread): | |
|
328 | """ A Windows-specific daemon thread that terminates the program immediately | |
|
329 | when a Win32 handle is signaled. | |
|
330 | """ | |
|
331 | ||
|
332 | def __init__(self, handle): | |
|
333 | super(ExitPollerWindows, self).__init__() | |
|
334 | self.daemon = True | |
|
335 | self.handle = handle | |
|
336 | ||
|
337 | def run(self): | |
|
338 | from _subprocess import WaitForSingleObject, WAIT_OBJECT_0, INFINITE | |
|
339 | result = WaitForSingleObject(self.handle, INFINITE) | |
|
340 | if result == WAIT_OBJECT_0: | |
|
341 | os._exit(1) | |
|
342 | ||
|
343 | ||
|
344 | 215 | def bind_port(socket, ip, port): |
|
345 | 216 | """ Binds the specified ZMQ socket. If the port is less than zero, a random |
|
346 | 217 | port is chosen. Returns the port that was bound. |
|
347 | 218 | """ |
|
348 | 219 | connection = 'tcp://%s' % ip |
|
349 | 220 | if port <= 0: |
|
350 | 221 | port = socket.bind_to_random_port(connection) |
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351 | 222 | else: |
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352 | 223 | connection += ':%i' % port |
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353 | 224 | socket.bind(connection) |
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354 | 225 | return port |
|
355 | 226 | |
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356 | 227 | |
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357 | 228 | def main(): |
|
358 | 229 | """ Main entry point for launching a kernel. |
|
359 | 230 | """ |
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360 | 231 | # Parse command line arguments. |
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361 | 232 | parser = ArgumentParser() |
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362 | 233 | parser.add_argument('--ip', type=str, default='127.0.0.1', |
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363 | 234 | help='set the kernel\'s IP address [default: local]') |
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364 | 235 | parser.add_argument('--xrep', type=int, metavar='PORT', default=0, |
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365 | 236 | help='set the XREP channel port [default: random]') |
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366 | 237 | parser.add_argument('--pub', type=int, metavar='PORT', default=0, |
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367 | 238 | help='set the PUB channel port [default: random]') |
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368 | 239 | parser.add_argument('--req', type=int, metavar='PORT', default=0, |
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369 | 240 | help='set the REQ channel port [default: random]') |
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370 | 241 | if sys.platform == 'win32': |
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371 | 242 | parser.add_argument('--parent', type=int, metavar='HANDLE', |
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372 | 243 | default=0, help='kill this process if the process ' |
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373 | 244 | 'with HANDLE dies') |
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374 | 245 | else: |
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375 | 246 | parser.add_argument('--parent', action='store_true', |
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376 | 247 | help='kill this process if its parent dies') |
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377 | 248 | namespace = parser.parse_args() |
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378 | 249 | |
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379 | 250 | # Create a context, a session, and the kernel sockets. |
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380 | 251 | print >>sys.__stdout__, "Starting the kernel..." |
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381 | 252 | context = zmq.Context() |
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382 | 253 | session = Session(username=u'kernel') |
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383 | 254 | |
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384 | 255 | reply_socket = context.socket(zmq.XREP) |
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385 | 256 | xrep_port = bind_port(reply_socket, namespace.ip, namespace.xrep) |
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386 | 257 | print >>sys.__stdout__, "XREP Channel on port", xrep_port |
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387 | 258 | |
|
388 | 259 | pub_socket = context.socket(zmq.PUB) |
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389 | 260 | pub_port = bind_port(pub_socket, namespace.ip, namespace.pub) |
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390 | 261 | print >>sys.__stdout__, "PUB Channel on port", pub_port |
|
391 | 262 | |
|
392 | 263 | req_socket = context.socket(zmq.XREQ) |
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393 | 264 | req_port = bind_port(req_socket, namespace.ip, namespace.req) |
|
394 | 265 | print >>sys.__stdout__, "REQ Channel on port", req_port |
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395 | 266 | |
|
396 | 267 | # Redirect input streams and set a display hook. |
|
397 | 268 | sys.stdout = OutStream(session, pub_socket, u'stdout') |
|
398 | 269 | sys.stderr = OutStream(session, pub_socket, u'stderr') |
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399 | 270 | sys.displayhook = DisplayHook(session, pub_socket) |
|
400 | 271 | |
|
401 | 272 | # Create the kernel. |
|
402 | 273 | kernel = Kernel(session, reply_socket, pub_socket, req_socket) |
|
403 | 274 | |
|
404 | 275 | # Configure this kernel/process to die on parent termination, if necessary. |
|
405 | 276 | if namespace.parent: |
|
406 | 277 | if sys.platform == 'win32': |
|
407 | 278 | poller = ExitPollerWindows(namespace.parent) |
|
408 | 279 | else: |
|
409 | 280 | poller = ExitPollerUnix() |
|
410 | 281 | poller.start() |
|
411 | 282 | |
|
412 | 283 | # Start the kernel mainloop. |
|
413 | 284 | kernel.start() |
|
414 | 285 | |
|
415 | 286 | |
|
416 | 287 | def launch_kernel(xrep_port=0, pub_port=0, req_port=0, independent=False): |
|
417 | 288 | """ Launches a localhost kernel, binding to the specified ports. |
|
418 | 289 | |
|
419 | 290 | Parameters |
|
420 | 291 | ---------- |
|
421 | 292 | xrep_port : int, optional |
|
422 | 293 | The port to use for XREP channel. |
|
423 | 294 | |
|
424 | 295 | pub_port : int, optional |
|
425 | 296 | The port to use for the SUB channel. |
|
426 | 297 | |
|
427 | 298 | req_port : int, optional |
|
428 | 299 | The port to use for the REQ (raw input) channel. |
|
429 | 300 | |
|
430 | 301 | independent : bool, optional (default False) |
|
431 | 302 | If set, the kernel process is guaranteed to survive if this process |
|
432 | 303 | dies. If not set, an effort is made to ensure that the kernel is killed |
|
433 | 304 | when this process dies. Note that in this case it is still good practice |
|
434 | 305 | to kill kernels manually before exiting. |
|
435 | 306 | |
|
436 | 307 | Returns |
|
437 | 308 | ------- |
|
438 | 309 | A tuple of form: |
|
439 | 310 | (kernel_process, xrep_port, pub_port, req_port) |
|
440 | 311 | where kernel_process is a Popen object and the ports are integers. |
|
441 | 312 | """ |
|
442 | 313 | import socket |
|
443 | 314 | from subprocess import Popen |
|
444 | 315 | |
|
445 | 316 | # Find open ports as necessary. |
|
446 | 317 | ports = [] |
|
447 | 318 | ports_needed = int(xrep_port <= 0) + int(pub_port <= 0) + int(req_port <= 0) |
|
448 | 319 | for i in xrange(ports_needed): |
|
449 | 320 | sock = socket.socket() |
|
450 | 321 | sock.bind(('', 0)) |
|
451 | 322 | ports.append(sock) |
|
452 | 323 | for i, sock in enumerate(ports): |
|
453 | 324 | port = sock.getsockname()[1] |
|
454 | 325 | sock.close() |
|
455 | 326 | ports[i] = port |
|
456 | 327 | if xrep_port <= 0: |
|
457 | 328 | xrep_port = ports.pop(0) |
|
458 | 329 | if pub_port <= 0: |
|
459 | 330 | pub_port = ports.pop(0) |
|
460 | 331 | if req_port <= 0: |
|
461 | 332 | req_port = ports.pop(0) |
|
462 | 333 | |
|
463 | 334 | # Spawn a kernel. |
|
464 | 335 | command = 'from IPython.zmq.kernel import main; main()' |
|
465 | 336 | arguments = [ sys.executable, '-c', command, '--xrep', str(xrep_port), |
|
466 | 337 | '--pub', str(pub_port), '--req', str(req_port) ] |
|
467 | 338 | if independent: |
|
468 | 339 | if sys.platform == 'win32': |
|
469 | 340 | proc = Popen(['start', '/b'] + arguments, shell=True) |
|
470 | 341 | else: |
|
471 | 342 | proc = Popen(arguments, preexec_fn=lambda: os.setsid()) |
|
472 | 343 | else: |
|
473 | 344 | if sys.platform == 'win32': |
|
474 | 345 | from _subprocess import DuplicateHandle, GetCurrentProcess, \ |
|
475 | 346 | DUPLICATE_SAME_ACCESS |
|
476 | 347 | pid = GetCurrentProcess() |
|
477 | 348 | handle = DuplicateHandle(pid, pid, pid, 0, |
|
478 | 349 | True, # Inheritable by new processes. |
|
479 | 350 | DUPLICATE_SAME_ACCESS) |
|
480 | 351 | proc = Popen(arguments + ['--parent', str(int(handle))]) |
|
481 | 352 | else: |
|
482 | 353 | proc = Popen(arguments + ['--parent']) |
|
483 | 354 | |
|
484 | 355 | return proc, xrep_port, pub_port, req_port |
|
485 | 356 | |
|
486 | 357 | |
|
487 | 358 | if __name__ == '__main__': |
|
488 | 359 | main() |
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