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46 lines
1.3 KiB
46 lines
1.3 KiB
# coding: utf-8
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"""A lab app that runs a sub process for a demo or a test."""
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import sys
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from tornado.ioloop import IOLoop
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from traitlets import Bool
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from .server import ServerApp
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from .handlers import add_handlers, LabConfig
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from .process import Process
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class ProcessApp(ServerApp):
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"""A notebook app that runs a separate process and exits on completion."""
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open_browser = Bool(False)
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lab_config = LabConfig()
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def get_command(self):
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"""Get the command and kwargs to run with `Process`.
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This is intended to be overridden.
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"""
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return ['python', '--version'], dict()
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def start(self):
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"""Start the application.
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"""
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add_handlers(self.web_app, self.lab_config)
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IOLoop.current().add_callback(self._run_command)
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ServerApp.start(self)
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def _run_command(self):
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command, kwargs = self.get_command()
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kwargs.setdefault('logger', self.log)
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future = Process(command, **kwargs).wait_async()
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IOLoop.current().add_future(future, self._process_finished)
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def _process_finished(self, future):
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try:
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IOLoop.current().stop()
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sys.exit(future.result())
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except Exception as e:
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self.log.error(str(e))
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sys.exit(1)
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