You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
import os
|
|
import signal
|
|
import uuid
|
|
|
|
from jupyter_core.application import base_flags
|
|
from jupyter_core.application import JupyterApp
|
|
from tornado.ioloop import IOLoop
|
|
from traitlets import Unicode
|
|
|
|
from . import __version__
|
|
from .kernelspec import KernelSpecManager
|
|
from .kernelspec import NATIVE_KERNEL_NAME
|
|
from .manager import KernelManager
|
|
|
|
|
|
class KernelApp(JupyterApp):
|
|
"""Launch a kernel by name in a local subprocess."""
|
|
|
|
version = __version__
|
|
description = "Run a kernel locally in a subprocess"
|
|
|
|
classes = [KernelManager, KernelSpecManager]
|
|
|
|
aliases = {
|
|
"kernel": "KernelApp.kernel_name",
|
|
"ip": "KernelManager.ip",
|
|
}
|
|
flags = {"debug": base_flags["debug"]}
|
|
|
|
kernel_name = Unicode(NATIVE_KERNEL_NAME, help="The name of a kernel type to start").tag(
|
|
config=True
|
|
)
|
|
|
|
def initialize(self, argv=None):
|
|
super().initialize(argv)
|
|
|
|
cf_basename = "kernel-%s.json" % uuid.uuid4()
|
|
self.config.setdefault("KernelManager", {}).setdefault(
|
|
"connection_file", os.path.join(self.runtime_dir, cf_basename)
|
|
)
|
|
self.km = KernelManager(kernel_name=self.kernel_name, config=self.config)
|
|
|
|
self.loop = IOLoop.current()
|
|
self.loop.add_callback(self._record_started)
|
|
|
|
def setup_signals(self) -> None:
|
|
"""Shutdown on SIGTERM or SIGINT (Ctrl-C)"""
|
|
if os.name == "nt":
|
|
return
|
|
|
|
def shutdown_handler(signo, frame):
|
|
self.loop.add_callback_from_signal(self.shutdown, signo)
|
|
|
|
for sig in [signal.SIGTERM, signal.SIGINT]:
|
|
signal.signal(sig, shutdown_handler)
|
|
|
|
def shutdown(self, signo: int) -> None:
|
|
self.log.info("Shutting down on signal %d" % signo)
|
|
self.km.shutdown_kernel()
|
|
self.loop.stop()
|
|
|
|
def log_connection_info(self) -> None:
|
|
cf = self.km.connection_file
|
|
self.log.info("Connection file: %s", cf)
|
|
self.log.info("To connect a client: --existing %s", os.path.basename(cf))
|
|
|
|
def _record_started(self) -> None:
|
|
"""For tests, create a file to indicate that we've started
|
|
|
|
Do not rely on this except in our own tests!
|
|
"""
|
|
fn = os.environ.get("JUPYTER_CLIENT_TEST_RECORD_STARTUP_PRIVATE")
|
|
if fn is not None:
|
|
with open(fn, "wb"):
|
|
pass
|
|
|
|
def start(self) -> None:
|
|
self.log.info("Starting kernel %r", self.kernel_name)
|
|
try:
|
|
self.km.start_kernel()
|
|
self.log_connection_info()
|
|
self.setup_signals()
|
|
self.loop.start()
|
|
finally:
|
|
self.km.cleanup_resources()
|
|
|
|
|
|
main = KernelApp.launch_instance
|