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""" Implements a fully blocking kernel manager.
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Useful for test suites and blocking terminal interfaces.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2012 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING.txt, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function
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# Local imports.
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from IPython.utils.io import raw_print
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from IPython.utils.traitlets import Type
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from kernelmanager import InProcessKernelManager, InProcessShellChannel, \
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InProcessIOPubChannel, InProcessStdInChannel
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from IPython.kernel.blockingkernelmanager import BlockingChannelMixin
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#-----------------------------------------------------------------------------
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# Blocking kernel manager
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#-----------------------------------------------------------------------------
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class BlockingInProcessShellChannel(BlockingChannelMixin, InProcessShellChannel):
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pass
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class BlockingInProcessIOPubChannel(BlockingChannelMixin, InProcessIOPubChannel):
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pass
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class BlockingInProcessStdInChannel(BlockingChannelMixin, InProcessStdInChannel):
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def call_handlers(self, msg):
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""" Overridden for the in-process channel.
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This methods simply calls raw_input directly.
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"""
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msg_type = msg['header']['msg_type']
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if msg_type == 'input_request':
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_raw_input = self.manager.kernel._sys_raw_input
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prompt = msg['content']['prompt']
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raw_print(prompt, end='')
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self.input(_raw_input())
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class BlockingInProcessKernelManager(InProcessKernelManager):
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# The classes to use for the various channels.
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shell_channel_class = Type(BlockingInProcessShellChannel)
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iopub_channel_class = Type(BlockingInProcessIOPubChannel)
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stdin_channel_class = Type(BlockingInProcessStdInChannel)
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