98 lines
2.6 KiB
Python
98 lines
2.6 KiB
Python
"""A kernel client for in-process kernels."""
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
from jupyter_client.channelsabc import HBChannelABC
|
|
|
|
from .socket import DummySocket
|
|
|
|
#-----------------------------------------------------------------------------
|
|
# Channel classes
|
|
#-----------------------------------------------------------------------------
|
|
|
|
class InProcessChannel(object):
|
|
"""Base class for in-process channels."""
|
|
proxy_methods = []
|
|
|
|
def __init__(self, client=None):
|
|
super(InProcessChannel, self).__init__()
|
|
self.client = client
|
|
self._is_alive = False
|
|
|
|
def is_alive(self):
|
|
return self._is_alive
|
|
|
|
def start(self):
|
|
self._is_alive = True
|
|
|
|
def stop(self):
|
|
self._is_alive = False
|
|
|
|
def call_handlers(self, msg):
|
|
""" This method is called in the main thread when a message arrives.
|
|
|
|
Subclasses should override this method to handle incoming messages.
|
|
"""
|
|
raise NotImplementedError('call_handlers must be defined in a subclass.')
|
|
|
|
def flush(self, timeout=1.0):
|
|
pass
|
|
|
|
|
|
def call_handlers_later(self, *args, **kwds):
|
|
""" Call the message handlers later.
|
|
|
|
The default implementation just calls the handlers immediately, but this
|
|
method exists so that GUI toolkits can defer calling the handlers until
|
|
after the event loop has run, as expected by GUI frontends.
|
|
"""
|
|
self.call_handlers(*args, **kwds)
|
|
|
|
def process_events(self):
|
|
""" Process any pending GUI events.
|
|
|
|
This method will be never be called from a frontend without an event
|
|
loop (e.g., a terminal frontend).
|
|
"""
|
|
raise NotImplementedError
|
|
|
|
|
|
|
|
class InProcessHBChannel(object):
|
|
"""A dummy heartbeat channel interface for in-process kernels.
|
|
|
|
Normally we use the heartbeat to check that the kernel process is alive.
|
|
When the kernel is in-process, that doesn't make sense, but clients still
|
|
expect this interface.
|
|
"""
|
|
|
|
time_to_dead = 3.0
|
|
|
|
def __init__(self, client=None):
|
|
super(InProcessHBChannel, self).__init__()
|
|
self.client = client
|
|
self._is_alive = False
|
|
self._pause = True
|
|
|
|
def is_alive(self):
|
|
return self._is_alive
|
|
|
|
def start(self):
|
|
self._is_alive = True
|
|
|
|
def stop(self):
|
|
self._is_alive = False
|
|
|
|
def pause(self):
|
|
self._pause = True
|
|
|
|
def unpause(self):
|
|
self._pause = False
|
|
|
|
def is_beating(self):
|
|
return not self._pause
|
|
|
|
|
|
HBChannelABC.register(InProcessHBChannel)
|