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kernel.py
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kernel.py
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import os
import sys
from rpython.rtyper.lltypesystem import rffi
from rmathics.parser import parse, WaitInputError
from rmathics.evaluation import evaluate
from rmathics.definitions import Definitions
from rmathics.kernel import rzmq, rjson, rlogging
rlogging.basicConfig(level=rlogging.INFO)
def read_contents(filename):
fp = os.open(filename, os.O_RDONLY, 0o777)
contents = ''
while True:
read = os.read(fp, 4096)
if len(read) == 0:
break
contents += read
os.close(fp)
return contents
class Connection(object):
def __init__(self, contents):
contents = contents.strip()
if not (contents[0] == '{' and contents[-1] == '}'):
raise ValueError("Invalid enclosing {}")
for entry in self.lrstrip1(contents).split(','):
field, value = entry.split(':', 1)
field = field.strip()
value = value.strip()
if not (field[0] == field[-1] == '"'):
raise ValueError("Invalid field %s" % field)
field = self.lrstrip1(field)
if value[0] == value[-1] == '"':
value = self.lrstrip1(value)
if field == 'transport':
self.transport = value
elif field == 'signature_scheme':
self.signature_scheme = value
elif field == 'ip':
self.ip = value
elif field == 'key':
self.key = value
else:
raise ValueError("Unknown str field %s" % field)
elif value.isdigit():
value = int(value)
if field == 'control_port':
self.control_port = value
elif field == 'shell_port':
self.shell_port = value
elif field == 'stdin_port':
self.stdin_port = value
elif field == 'hb_port':
self.hb_port = value
elif field == 'iopub_port':
self.iopub_port = value
else:
raise ValueError("Unknown int field %s" % field)
else:
raise ValueError("Unknown value type %s" % value)
self.execution_count = 1
self.definitions = Definitions()
@staticmethod
def lrstrip1(s):
'''
returns s[1:-1]
'''
istart = 1
istop = len(s) - 1
assert istop >= 1
return s[istart:istop]
def bind(self):
rlogging.info('binding sockets')
self.ctx = rzmq.init(1)
base_endpoint = self.transport + '://' + self.ip + ':'
self.hb = rzmq.socket(self.ctx, rzmq.REP)
rc = rzmq.bind(self.hb, base_endpoint + '%s' % self.hb_port)
assert rc == 0
self.shell = rzmq.socket(self.ctx, rzmq.ROUTER)
rc = rzmq.bind(self.shell, base_endpoint + '%s' % self.shell_port)
assert rc == 0
self.control = rzmq.socket(self.ctx, rzmq.ROUTER)
rc = rzmq.bind(self.control, base_endpoint + '%s' % self.control_port)
assert rc == 0
self.stdin = rzmq.socket(self.ctx, rzmq.ROUTER)
rc = rzmq.bind(self.stdin, base_endpoint + '%s' % self.stdin_port)
assert rc == 0
self.iopub = rzmq.socket(self.ctx, rzmq.PUB)
rc = rzmq.bind(self.iopub, base_endpoint + '%s' % self.iopub_port)
assert rc == 0
@staticmethod
def msg_recv(socket):
result = []
morep = rffi.lltype.malloc(rffi.INTP.TO, 1, flavor='raw')
morep[0] = rffi.r_int(1)
more_sizep = rffi.lltype.malloc(rffi.UINTP.TO, 1, flavor='raw')
more_sizep[0] = rffi.r_uint(rffi.sizeof(rffi.INT))
while int(morep[0]):
part = rffi.lltype.malloc(rzmq.msg_t.TO, flavor='raw')
rc = rzmq.msg_init(part)
assert rc == 0
msg_size = rzmq.msg_recv(part, socket, 0)
assert msg_size != -1
result.append(rffi.charpsize2str(rzmq.msg_data(part), msg_size))
rc = rzmq.getsockopt(socket, rzmq.RCVMORE, morep, more_sizep)
assert rc == 0
rc = rzmq.msg_close(part)
assert rc == 0
return result
@staticmethod
def msg_send(socket, parts):
for i, part in enumerate(parts):
msg = rffi.lltype.malloc(rzmq.msg_t.TO, flavor='raw')
rc = rzmq.msg_init_size(msg, len(part))
assert rc == 0
rffi.c_memcpy(rzmq.msg_data(msg), part, len(part))
if i < len(parts) - 1:
msg_size = rzmq.msg_send(msg, socket, rzmq.SNDMORE)
else:
msg_size = rzmq.msg_send(msg, socket, 0)
assert msg_size == len(part)
def eventloop(self):
'''
Poll each socket in turn and respond to any messages.
For long running evaluations the heartbeat message may be sent too late
'''
pollitem = rffi.lltype.malloc(rzmq.pollitem_t, flavor='raw')
pollitem.c_events = rffi.r_short(rzmq.POLLIN)
while True:
# Shell
pollitem.c_socket = self.shell
rc = rzmq.poll(pollitem, rffi.r_int(1), rffi.r_long(100))
if rc > 0:
rlogging.debug('shell message')
request = self.msg_recv(self.shell)
self.msg_send(self.iopub, self.construct_message( # report kernel busy
request[0], request[3], '{"execution_state":"busy"}', 'status'))
self.shell_msg(request)
self.msg_send(self.iopub, self.construct_message( # report kernel idle
request[0], request[3], '{"execution_state":"idle"}', 'status'))
# Control
pollitem.c_socket = self.control
while rzmq.poll(pollitem, rffi.r_int(1), rffi.r_long(1)) > 0:
rlogging.debug('control message')
request = self.msg_recv(self.control)
self.control_msg(request)
# HB
pollitem.c_socket = self.hb
while rzmq.poll(pollitem, rffi.r_int(1), rffi.r_long(1)) > 0:
rlogging.debug('hearbeat message')
request = self.msg_recv(self.hb)
self.hb_msg(request)
def control_msg(self, request):
header = rjson.loads(request[3])
msg_type = header['msg_type']._str
rlogging.warn("Ignoring msg %s" % msg_type)
def hb_msg(self, request):
self.msg_send(self.hb, request)
def shell_msg(self, request):
header = rjson.loads(request[3])
msg_type = header['msg_type']._str
if msg_type == 'kernel_info_request':
response = self.construct_message(request[0], request[3],
self.kernel_info(),
'kernel_info_reply')
self.msg_send(self.shell, response)
elif msg_type == 'execute_request':
content = rjson.loads(request[6])
code = content['code']._str
# Parse
try:
expr, messages = parse(code, self.definitions)
except WaitInputError:
expr, messages = None, [('Syntax', 'sntup')]
for message in messages:
error = rjson.JDict({ # FIXME
"ename": rjson.JStr(message[0]),
"evalue": rjson.JStr(message[1]),
"traceback": rjson.JList([]),
}).dumps()
error_response = self.construct_message(
request[0], request[3], error, 'error')
self.msg_send(self.iopub, error_response)
# Evaluate
if expr is not None:
result, messages = evaluate(expr, self.definitions)
for message in messages:
error = rjson.JDict({ # FIXME
"ename": rjson.JStr(message[0]),
"evalue": rjson.JStr(message[1]),
"traceback": rjson.JList([]),
}).dumps()
error_response = self.construct_message(
request[0], request[3], error, 'error')
self.msg_send(self.iopub, error_response)
execute_result = rjson.JDict({
"execution_count": rjson.JInt(self.execution_count),
"data": rjson.JDict({'text/plain': rjson.JStr(result.repr())}),
"metadata": rjson.JDict({}),
}).dumps()
result_response = self.construct_message(
request[0], request[3], execute_result, 'execute_result')
self.msg_send(self.iopub, result_response)
execute_reply = rjson.JDict({
"status": rjson.JStr("ok"),
"execution_count": rjson.JInt(self.execution_count),
"user_expressions": rjson.JDict({}),
"payload": rjson.JList([]),
}).dumps()
reply_response = self.construct_message(
request[0], request[3], execute_reply, 'execute_reply')
self.msg_send(self.shell, reply_response)
self.execution_count += 1
else:
rlogging.warn("Ignoring msg %s" % msg_type)
def construct_message(self, zmq_identity, parent, content, msg_type):
rlogging.debug('construct_message(' +' ,'.join([zmq_identity, parent, content, msg_type]) + ')')
header = rjson.JDict({
'msg_id': rjson.JStr('8fdb7d8e-8be3-44c6-9579-3f1d646bb097'),
'username': rjson.JStr('angus'),
'session': rjson.JStr(zmq_identity),
'msg_type': rjson.JStr(msg_type),
'version': rjson.JStr('5.0'),
})
metadata = '{}'
sig = '' # TODO
response = [
zmq_identity, # zmq identity(ies)
'<IDS|MSG>', # delimiter
sig, # HMAC signature
header.dumps(), # header
parent, # parent_header
metadata, # serialized metadata dict
content, # serialized content dict
'{}', # extra eaw data buffer(s)
]
return response
def kernel_info(self):
content = rjson.JDict({
'protocol_version': rjson.JStr('5.0'),
'implementation': rjson.JStr('rmathics'),
'implementation_version': rjson.JStr('0.0.1'),
'language_info': rjson.JDict({
'name': rjson.JStr('mathics'),
'version': rjson.JStr('1.0.0'),
'mimetype': rjson.JStr('application/mathics'),
'file_extension': rjson.JStr('m'),
# 'pygarments_lexer': rjson.JStr('???'),
# 'codemirror_code': rjson.JStr('???'),
# 'nbconvert_exporter': rjson.JStr('???'),
}),
'banner': rjson.JStr('RPYTHON MATHICS'),
})
return content.dumps()
def entry_point(argv):
if len(argv) != 2:
return 1
try:
connection = Connection(read_contents(argv[1]))
except ValueError:
return 1
connection.bind()
rlogging.info(str((
connection.control_port, connection.shell_port, connection.transport,
connection.signature_scheme, connection.stdin_port, connection.hb_port,
connection.ip, connection.iopub_port, connection.key)))
connection.eventloop()
return 0
def target(*args):
return entry_point, None
if __name__ == "__main__":
entry_point(sys.argv)