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"""A client for in-process kernels."""
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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, 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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# IPython imports
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from IPython.utils.traitlets import Type, Instance
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from IPython.kernel.clientabc import KernelClientABC
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from IPython.kernel.client import KernelClient
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# Local imports
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from .channels import (
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InProcessShellChannel,
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InProcessIOPubChannel,
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InProcessHBChannel,
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InProcessStdInChannel,
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)
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#-----------------------------------------------------------------------------
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# Main kernel Client class
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#-----------------------------------------------------------------------------
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class InProcessKernelClient(KernelClient):
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"""A client for an in-process kernel.
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This class implements the interface of
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`IPython.kernel.clientabc.KernelClientABC` and allows
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(asynchronous) frontends to be used seamlessly with an in-process kernel.
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See `IPython.kernel.client.KernelClient` for docstrings.
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"""
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# The classes to use for the various channels.
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shell_channel_class = Type(InProcessShellChannel)
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iopub_channel_class = Type(InProcessIOPubChannel)
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stdin_channel_class = Type(InProcessStdInChannel)
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hb_channel_class = Type(InProcessHBChannel)
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kernel = Instance('IPython.kernel.inprocess.ipkernel.InProcessKernel')
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#--------------------------------------------------------------------------
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# Channel management methods
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#--------------------------------------------------------------------------
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def start_channels(self, *args, **kwargs):
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super(InProcessKernelClient, self).start_channels(self)
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self.kernel.frontends.append(self)
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@property
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def shell_channel(self):
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if self._shell_channel is None:
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self._shell_channel = self.shell_channel_class(self)
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return self._shell_channel
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@property
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def iopub_channel(self):
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if self._iopub_channel is None:
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self._iopub_channel = self.iopub_channel_class(self)
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return self._iopub_channel
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@property
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def stdin_channel(self):
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if self._stdin_channel is None:
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self._stdin_channel = self.stdin_channel_class(self)
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return self._stdin_channel
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@property
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def hb_channel(self):
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if self._hb_channel is None:
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self._hb_channel = self.hb_channel_class(self)
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return self._hb_channel
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#-----------------------------------------------------------------------------
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# ABC Registration
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#-----------------------------------------------------------------------------
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KernelClientABC.register(InProcessKernelClient)
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