update inprocess kernel to new layout

including Qt mixins

IPython/kernel/inprocess/channels.py

@@ -0,0 +1,194 b''
+""" A kernel client for in-process kernels. """
+
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2012  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+# IPython imports
+from IPython.kernel.channelabc import (
+    ShellChannelABC, IOPubChannelABC,
+    HBChannelABC, StdInChannelABC,
+)
+
+# Local imports
+from .socket import DummySocket
+
+#-----------------------------------------------------------------------------
+# Channel classes
+#-----------------------------------------------------------------------------
+
+class InProcessChannel(object):
+    """Base class for in-process channels."""
+    proxy_methods = []
+
+    def __init__(self, client):
+        super(InProcessChannel, self).__init__()
+        self.client = client
+        self._is_alive = False
+
+    #--------------------------------------------------------------------------
+    # Channel interface
+    #--------------------------------------------------------------------------
+
+    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.')
+
+    #--------------------------------------------------------------------------
+    # InProcessChannel interface
+    #--------------------------------------------------------------------------
+
+    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 InProcessShellChannel(InProcessChannel):
+    """See `IPython.kernel.channels.ShellChannel` for docstrings."""
+
+    # flag for whether execute requests should be allowed to call raw_input
+    allow_stdin = True
+    proxy_methods = [
+        'execute',
+        'complete',
+        'object_info',
+        'history',
+        'shutdown',
+    ]
+
+    #--------------------------------------------------------------------------
+    # ShellChannel interface
+    #--------------------------------------------------------------------------
+
+    def execute(self, code, silent=False, store_history=True,
+                user_variables=[], user_expressions={}, allow_stdin=None):
+        if allow_stdin is None:
+            allow_stdin = self.allow_stdin
+        content = dict(code=code, silent=silent, store_history=store_history,
+                       user_variables=user_variables,
+                       user_expressions=user_expressions,
+                       allow_stdin=allow_stdin)
+        msg = self.client.session.msg('execute_request', content)
+        self._dispatch_to_kernel(msg)
+        return msg['header']['msg_id']
+
+    def complete(self, text, line, cursor_pos, block=None):
+        content = dict(text=text, line=line, block=block, cursor_pos=cursor_pos)
+        msg = self.client.session.msg('complete_request', content)
+        self._dispatch_to_kernel(msg)
+        return msg['header']['msg_id']
+
+    def object_info(self, oname, detail_level=0):
+        content = dict(oname=oname, detail_level=detail_level)
+        msg = self.client.session.msg('object_info_request', content)
+        self._dispatch_to_kernel(msg)
+        return msg['header']['msg_id']
+
+    def history(self, raw=True, output=False, hist_access_type='range', **kwds):
+        content = dict(raw=raw, output=output,
+                       hist_access_type=hist_access_type, **kwds)
+        msg = self.client.session.msg('history_request', content)
+        self._dispatch_to_kernel(msg)
+        return msg['header']['msg_id']
+
+    def shutdown(self, restart=False):
+        # FIXME: What to do here?
+        raise NotImplementedError('Cannot shutdown in-process kernel')
+
+    #--------------------------------------------------------------------------
+    # Protected interface
+    #--------------------------------------------------------------------------
+
+    def _dispatch_to_kernel(self, msg):
+        """ Send a message to the kernel and handle a reply.
+        """
+        kernel = self.client.kernel
+        if kernel is None:
+            raise RuntimeError('Cannot send request. No kernel exists.')
+
+        stream = DummySocket()
+        self.client.session.send(stream, msg)
+        msg_parts = stream.recv_multipart()
+        kernel.dispatch_shell(stream, msg_parts)
+
+        idents, reply_msg = self.client.session.recv(stream, copy=False)
+        self.call_handlers_later(reply_msg)
+
+
+class InProcessIOPubChannel(InProcessChannel):
+    """See `IPython.kernel.channels.IOPubChannel` for docstrings."""
+
+    def flush(self, timeout=1.0):
+        pass
+
+
+class InProcessStdInChannel(InProcessChannel):
+    """See `IPython.kernel.channels.StdInChannel` for docstrings."""
+
+    proxy_methods = ['input']
+
+    def input(self, string):
+        kernel = self.client.kernel
+        if kernel is None:
+            raise RuntimeError('Cannot send input reply. No kernel exists.')
+        kernel.raw_input_str = string
+
+
+class InProcessHBChannel(InProcessChannel):
+    """See `IPython.kernel.channels.HBChannel` for docstrings."""
+
+    time_to_dead = 3.0
+
+    def __init__(self, *args, **kwds):
+        super(InProcessHBChannel, self).__init__(*args, **kwds)
+        self._pause = True
+
+    def pause(self):
+        self._pause = True
+
+    def unpause(self):
+        self._pause = False
+
+    def is_beating(self):
+        return not self._pause
+
+#-----------------------------------------------------------------------------
+# ABC Registration
+#-----------------------------------------------------------------------------
+
+ShellChannelABC.register(InProcessShellChannel)
+IOPubChannelABC.register(InProcessIOPubChannel)
+HBChannelABC.register(InProcessHBChannel)
+StdInChannelABC.register(InProcessStdInChannel)

IPython/frontend/qt/inprocess.py

@@ -1,33 +1,34 b''
 """ Defines an in-process KernelManager with signals and slots.
 """
 
 # Local imports.
-from IPython.kernel.inprocess.kernelmanager import \
-    InProcessShellChannel, InProcessIOPubChannel, InProcessStdInChannel, \
-    InProcessHBChannel, InProcessKernelManager
+from IPython.kernel.inprocess import (
+    InProcessShellChannel, InProcessIOPubChannel, InProcessStdInChannel,
+    InProcessHBChannel, InProcessKernelClient
+)
+
 from IPython.utils.traitlets import Type
-from base_kernelmanager import QtShellChannelMixin, QtIOPubChannelMixin, \
-    QtStdInChannelMixin, QtHBChannelMixin, QtKernelManagerMixin
+from kernel_mixins import QtShellChannelMixin, QtIOPubChannelMixin, \
+    QtStdInChannelMixin, QtHBChannelMixin, QtKernelClientMixin
 
 
 class QtInProcessShellChannel(QtShellChannelMixin, InProcessShellChannel):
     pass
 
 class QtInProcessIOPubChannel(QtIOPubChannelMixin, InProcessIOPubChannel):
     pass
 
 class QtInProcessStdInChannel(QtStdInChannelMixin, InProcessStdInChannel):
     pass
 
 class QtInProcessHBChannel(QtHBChannelMixin, InProcessHBChannel):
     pass
 
-
-class QtInProcessKernelManager(QtKernelManagerMixin, InProcessKernelManager):
+class QtInProcessKernelClient(QtKernelClientMixin, InProcessKernelClient):
     """ An in-process KernelManager with signals and slots.
     """
 
     iopub_channel_class = Type(QtInProcessIOPubChannel)
     shell_channel_class = Type(QtInProcessShellChannel)
     stdin_channel_class = Type(QtInProcessStdInChannel)
     hb_channel_class = Type(QtInProcessHBChannel)

IPython/kernel/inprocess/__init__.py

@@ -0,0 +1,8 b''
+from .channels import (
+    InProcessShellChannel,
+    InProcessIOPubChannel,
+    InProcessStdInChannel,
+    InProcessHBChannel,
+)
+from .client import InProcessKernelClient
+from .manager import InProcessKernelManager
  No newline at end of file

IPython/kernel/inprocess/blocking.py

@@ -1,54 +1,58 b''
-""" Implements a fully blocking kernel manager.
+""" Implements a fully blocking kernel client.
 
 Useful for test suites and blocking terminal interfaces.
 """
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2012  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING.txt, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
-from __future__ import print_function
 
-# Local imports.
+# IPython imports
 from IPython.utils.io import raw_print
 from IPython.utils.traitlets import Type
-from kernelmanager import InProcessKernelManager, InProcessShellChannel, \
-    InProcessIOPubChannel, InProcessStdInChannel
-from IPython.kernel.blockingkernelmanager import BlockingChannelMixin
+from IPython.kernel.blocking.channels import BlockingChannelMixin
 
+# Local imports
+from .channels import (
+    InProcessShellChannel,
+    InProcessIOPubChannel,
+    InProcessStdInChannel,
+)
+from .client import InProcessKernelClient
 
 #-----------------------------------------------------------------------------
 # Blocking kernel manager
 #-----------------------------------------------------------------------------
 
 class BlockingInProcessShellChannel(BlockingChannelMixin, InProcessShellChannel):
     pass
 
 class BlockingInProcessIOPubChannel(BlockingChannelMixin, InProcessIOPubChannel):
     pass
 
 class BlockingInProcessStdInChannel(BlockingChannelMixin, InProcessStdInChannel):
-    
+
     def call_handlers(self, msg):
         """ Overridden for the in-process channel.
 
         This methods simply calls raw_input directly.
         """
         msg_type = msg['header']['msg_type']
         if msg_type == 'input_request':
-            _raw_input = self.manager.kernel._sys_raw_input
+            _raw_input = self.client.kernel._sys_raw_input
             prompt = msg['content']['prompt']
             raw_print(prompt, end='')
             self.input(_raw_input())
 
-class BlockingInProcessKernelManager(InProcessKernelManager):
+class BlockingInProcessKernelClient(InProcessKernelClient):
 
     # The classes to use for the various channels.
     shell_channel_class = Type(BlockingInProcessShellChannel)
     iopub_channel_class = Type(BlockingInProcessIOPubChannel)
     stdin_channel_class = Type(BlockingInProcessStdInChannel)

IPython/kernel/inprocess/client.py

@@ -1,313 +1,87 b''
-""" A kernel manager for in-process kernels. """
+"""A client for in-process kernels."""
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2012  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
-# Local imports.
-from IPython.config.configurable import Configurable
-from IPython.utils.traitlets import Any, Instance, Type
-from IPython.kernel.kernelmanagerabc import (
-    ShellChannelABC, IOPubChannelABC,
-    HBChannelABC, StdInChannelABC,
-    KernelManagerABC
-)
-
-from .socket import DummySocket
-
-#-----------------------------------------------------------------------------
-# Channel classes
-#-----------------------------------------------------------------------------
-
-class InProcessChannel(object):
-    """Base class for in-process channels."""
-
-    def __init__(self, manager):
-        super(InProcessChannel, self).__init__()
-        self.manager = manager
-        self._is_alive = False
-
-    #--------------------------------------------------------------------------
-    # Channel interface
-    #--------------------------------------------------------------------------
-
-    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.')
-
-    #--------------------------------------------------------------------------
-    # InProcessChannel interface
-    #--------------------------------------------------------------------------
-
-    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 InProcessShellChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.ShellChannel` for docstrings."""
-
-    # flag for whether execute requests should be allowed to call raw_input
-    allow_stdin = True
-
-    #--------------------------------------------------------------------------
-    # ShellChannel interface
-    #--------------------------------------------------------------------------
-
-    def execute(self, code, silent=False, store_history=True,
-                user_variables=[], user_expressions={}, allow_stdin=None):
-        if allow_stdin is None:
-            allow_stdin = self.allow_stdin
-        content = dict(code=code, silent=silent, store_history=store_history,
-                       user_variables=user_variables,
-                       user_expressions=user_expressions,
-                       allow_stdin=allow_stdin)
-        msg = self.manager.session.msg('execute_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def complete(self, text, line, cursor_pos, block=None):
-        content = dict(text=text, line=line, block=block, cursor_pos=cursor_pos)
-        msg = self.manager.session.msg('complete_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def object_info(self, oname, detail_level=0):
-        content = dict(oname=oname, detail_level=detail_level)
-        msg = self.manager.session.msg('object_info_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def history(self, raw=True, output=False, hist_access_type='range', **kwds):
-        content = dict(raw=raw, output=output,
-                       hist_access_type=hist_access_type, **kwds)
-        msg = self.manager.session.msg('history_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def shutdown(self, restart=False):
-        # FIXME: What to do here?
-        raise NotImplementedError('Cannot shutdown in-process kernel')
-
-    #--------------------------------------------------------------------------
-    # Protected interface
-    #--------------------------------------------------------------------------
+# IPython imports
+from IPython.utils.traitlets import Type, Instance
+from IPython.kernel.clientabc import KernelClientABC
+from IPython.kernel.client import KernelClient
 
-    def _dispatch_to_kernel(self, msg):
-        """ Send a message to the kernel and handle a reply.
-        """
-        kernel = self.manager.kernel
-        if kernel is None:
-            raise RuntimeError('Cannot send request. No kernel exists.')
-
-        stream = DummySocket()
-        self.manager.session.send(stream, msg)
-        msg_parts = stream.recv_multipart()
-        kernel.dispatch_shell(stream, msg_parts)
-
-        idents, reply_msg = self.manager.session.recv(stream, copy=False)
-        self.call_handlers_later(reply_msg)
-
-
-class InProcessIOPubChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.IOPubChannel` for docstrings."""
-
-    def flush(self, timeout=1.0):
-        pass
-
-
-class InProcessStdInChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.StdInChannel` for docstrings."""
-
-    def input(self, string):
-        kernel = self.manager.kernel
-        if kernel is None:
-            raise RuntimeError('Cannot send input reply. No kernel exists.')
-        kernel.raw_input_str = string
-
-
-class InProcessHBChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.HBChannel` for docstrings."""
-
-    time_to_dead = 3.0
-
-    def __init__(self, *args, **kwds):
-        super(InProcessHBChannel, self).__init__(*args, **kwds)
-        self._pause = True
-
-    def pause(self):
-        self._pause = True
-
-    def unpause(self):
-        self._pause = False
-
-    def is_beating(self):
-        return not self._pause
+# Local imports
+from .channels import (
+    InProcessShellChannel,
+    InProcessIOPubChannel,
+    InProcessHBChannel,
+    InProcessStdInChannel,
 
+)
 
 #-----------------------------------------------------------------------------
-# Main kernel manager class
+# Main kernel Client class
 #-----------------------------------------------------------------------------
 
-class InProcessKernelManager(KernelManager):
-    """A manager for an in-process kernel.
+class InProcessKernelClient(KernelClient):
+    """A client for an in-process kernel.
 
     This class implements the interface of
-    `IPython.kernel.kernelmanagerabc.KernelManagerABC` and allows
+    `IPython.kernel.clientabc.KernelClientABC` and allows
     (asynchronous) frontends to be used seamlessly with an in-process kernel.
 
-    See `IPython.kernel.kernelmanager.KernelManager` for docstrings.
+    See `IPython.kernel.client.KernelClient` for docstrings.
     """
 
-    # The Session to use for building messages.
-    session = Instance('IPython.kernel.zmq.session.Session')
-    def _session_default(self):
-        from IPython.kernel.zmq.session import Session
-        return Session(config=self.config)
-
-    # The kernel process with which the KernelManager is communicating.
-    kernel = Instance('IPython.kernel.inprocess.ipkernel.InProcessKernel')
-
     # The classes to use for the various channels.
     shell_channel_class = Type(InProcessShellChannel)
     iopub_channel_class = Type(InProcessIOPubChannel)
     stdin_channel_class = Type(InProcessStdInChannel)
     hb_channel_class = Type(InProcessHBChannel)
 
-    # Protected traits.
-    _shell_channel = Any
-    _iopub_channel = Any
-    _stdin_channel = Any
-    _hb_channel = Any
+    kernel = Instance('IPython.kernel.inprocess.ipkernel.Kernel')
 
     #--------------------------------------------------------------------------
-    # Channel management methods.
+    # Channel management methods
     #--------------------------------------------------------------------------
 
-    def start_channels(self, shell=True, iopub=True, stdin=True, hb=True):
-        if shell:
-            self.shell_channel.start()
-        if iopub:
-            self.iopub_channel.start()
-        if stdin:
-            self.stdin_channel.start()
-            self.shell_channel.allow_stdin = True
-        else:
-            self.shell_channel.allow_stdin = False
-        if hb:
-            self.hb_channel.start()
-
-    def stop_channels(self):
-        if self.shell_channel.is_alive():
-            self.shell_channel.stop()
-        if self.iopub_channel.is_alive():
-            self.iopub_channel.stop()
-        if self.stdin_channel.is_alive():
-            self.stdin_channel.stop()
-        if self.hb_channel.is_alive():
-            self.hb_channel.stop()
-
-    @property
-    def channels_running(self):
-        return (self.shell_channel.is_alive() or self.iopub_channel.is_alive() or
-                self.stdin_channel.is_alive() or self.hb_channel.is_alive())
+    def start_channels(self, *args, **kwargs):
+        super(InProcessKernelClient, self).start_channels(self)
+        self.kernel.frontends.append(self)
 
     @property
     def shell_channel(self):
         if self._shell_channel is None:
             self._shell_channel = self.shell_channel_class(self)
         return self._shell_channel
 
     @property
     def iopub_channel(self):
         if self._iopub_channel is None:
             self._iopub_channel = self.iopub_channel_class(self)
         return self._iopub_channel
 
     @property
     def stdin_channel(self):
         if self._stdin_channel is None:
             self._stdin_channel = self.stdin_channel_class(self)
         return self._stdin_channel
 
     @property
     def hb_channel(self):
         if self._hb_channel is None:
             self._hb_channel = self.hb_channel_class(self)
         return self._hb_channel
 
-    #--------------------------------------------------------------------------
-    # Kernel management methods:
-    #--------------------------------------------------------------------------
-
-    def start_kernel(self, **kwds):
-        from IPython.kernel.inprocess.ipkernel import InProcessKernel
-        self.kernel = InProcessKernel()
-        self.kernel.frontends.append(self)
-
-    def shutdown_kernel(self):
-        self._kill_kernel()
-
-    def restart_kernel(self, now=False, **kwds):
-        self.shutdown_kernel()
-        self.start_kernel(**kwds)
-
-    @property
-    def has_kernel(self):
-        return self.kernel is not None
-
-    def _kill_kernel(self):
-        self.kernel.frontends.remove(self)
-        self.kernel = None
-
-    def interrupt_kernel(self):
-        raise NotImplementedError("Cannot interrupt in-process kernel.")
-
-    def signal_kernel(self, signum):
-        raise NotImplementedError("Cannot signal in-process kernel.")
-
-    def is_alive(self):
-        return True
-
 
 #-----------------------------------------------------------------------------
 # ABC Registration
 #-----------------------------------------------------------------------------
 
-ShellChannelABC.register(InProcessShellChannel)
-IOPubChannelABC.register(InProcessIOPubChannel)
-HBChannelABC.register(InProcessHBChannel)
-StdInChannelABC.register(InProcessStdInChannel)
-KernelManagerABC.register(InProcessKernelManager)
+KernelClientABC.register(InProcessKernelClient)

IPython/kernel/inprocess/ipkernel.py

@@ -1,177 +1,178 b''
 """An in-process kernel"""
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2012  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 # Standard library imports
 from contextlib import contextmanager
 import logging
 import sys
 
 # Local imports
 from IPython.core.interactiveshell import InteractiveShellABC
 from IPython.utils.jsonutil import json_clean
 from IPython.utils.traitlets import Any, Enum, Instance, List, Type
 from IPython.kernel.zmq.ipkernel import Kernel
 from IPython.kernel.zmq.zmqshell import ZMQInteractiveShell
 
 from .socket import DummySocket
 
 #-----------------------------------------------------------------------------
 # Main kernel class
 #-----------------------------------------------------------------------------
 
 class InProcessKernel(Kernel):
 
     #-------------------------------------------------------------------------
     # InProcessKernel interface
     #-------------------------------------------------------------------------
 
     # The frontends connected to this kernel.
     frontends = List(
-        Instance('IPython.kernel.inprocess.kernelmanager.InProcessKernelManager'))
+        Instance('IPython.kernel.inprocess.client.InProcessKernelClient')
+    )
 
     # The GUI environment that the kernel is running under. This need not be
     # specified for the normal operation for the kernel, but is required for
     # IPython's GUI support (including pylab). The default is 'inline' because
     # it is safe under all GUI toolkits.
     gui = Enum(('tk', 'gtk', 'wx', 'qt', 'qt4', 'inline'),
                default_value='inline')
 
     raw_input_str = Any()
     stdout = Any()
     stderr = Any()
 
     #-------------------------------------------------------------------------
     # Kernel interface
     #-------------------------------------------------------------------------
 
     shell_class = Type()
     shell_streams = List()
     control_stream = Any()
     iopub_socket = Instance(DummySocket, ())
     stdin_socket = Instance(DummySocket, ())
 
     def __init__(self, **traits):
         # When an InteractiveShell is instantiated by our base class, it binds
         # the current values of sys.stdout and sys.stderr.
         with self._redirected_io():
             super(InProcessKernel, self).__init__(**traits)
 
         self.iopub_socket.on_trait_change(self._io_dispatch, 'message_sent')
         self.shell.kernel = self
 
     def execute_request(self, stream, ident, parent):
         """ Override for temporary IO redirection. """
         with self._redirected_io():
             super(InProcessKernel, self).execute_request(stream, ident, parent)
 
     def start(self):
         """ Override registration of dispatchers for streams. """
         self.shell.exit_now = False
 
     def _abort_queue(self, stream):
         """ The in-process kernel doesn't abort requests. """
         pass
 
     def _raw_input(self, prompt, ident, parent):
         # Flush output before making the request.
         self.raw_input_str = None
         sys.stderr.flush()
         sys.stdout.flush()
 
         # Send the input request.
         content = json_clean(dict(prompt=prompt))
         msg = self.session.msg(u'input_request', content, parent)
         for frontend in self.frontends:
             if frontend.session.session == parent['header']['session']:
                 frontend.stdin_channel.call_handlers(msg)
                 break
         else:
             logging.error('No frontend found for raw_input request')
             return str()
 
         # Await a response.
         while self.raw_input_str is None:
             frontend.stdin_channel.process_events()
         return self.raw_input_str
 
     #-------------------------------------------------------------------------
     # Protected interface
     #-------------------------------------------------------------------------
 
     @contextmanager
     def _redirected_io(self):
         """ Temporarily redirect IO to the kernel.
         """
         sys_stdout, sys_stderr = sys.stdout, sys.stderr
         sys.stdout, sys.stderr = self.stdout, self.stderr
         yield
         sys.stdout, sys.stderr = sys_stdout, sys_stderr
 
     #------ Trait change handlers --------------------------------------------
 
     def _io_dispatch(self):
         """ Called when a message is sent to the IO socket.
         """
         ident, msg = self.session.recv(self.iopub_socket, copy=False)
         for frontend in self.frontends:
             frontend.iopub_channel.call_handlers(msg)
         
     #------ Trait initializers -----------------------------------------------
 
     def _log_default(self):
         return logging.getLogger(__name__)
 
     def _session_default(self):
         from IPython.kernel.zmq.session import Session
         return Session(config=self.config)
 
     def _shell_class_default(self):
         return InProcessInteractiveShell
 
     def _stdout_default(self):
         from IPython.kernel.zmq.iostream import OutStream
         return OutStream(self.session, self.iopub_socket, u'stdout', pipe=False)
 
     def _stderr_default(self):
         from IPython.kernel.zmq.iostream import OutStream
         return OutStream(self.session, self.iopub_socket, u'stderr', pipe=False)
 
 #-----------------------------------------------------------------------------
 # Interactive shell subclass
 #-----------------------------------------------------------------------------
 
 class InProcessInteractiveShell(ZMQInteractiveShell):
 
     kernel = Instance('IPython.kernel.inprocess.ipkernel.InProcessKernel')
 
     #-------------------------------------------------------------------------
     # InteractiveShell interface
     #-------------------------------------------------------------------------
 
     def enable_gui(self, gui=None):
         """ Enable GUI integration for the kernel.
         """
         from IPython.kernel.zmq.eventloops import enable_gui
         if not gui:
             gui = self.kernel.gui
         enable_gui(gui, kernel=self.kernel)
 
     def enable_pylab(self, gui=None, import_all=True, welcome_message=False):
         """ Activate pylab support at runtime.
         """
         if not gui:
             gui = self.kernel.gui
         super(InProcessInteractiveShell, self).enable_pylab(gui, import_all,
                                                             welcome_message)
 
 InteractiveShellABC.register(InProcessInteractiveShell)

IPython/kernel/inprocess/manager.py

@@ -1,313 +1,71 b''
-""" A kernel manager for in-process kernels. """
+"""A kernel manager for in-process kernels."""
 
 #-----------------------------------------------------------------------------
-#  Copyright (C) 2012  The IPython Development Team
+#  Copyright (C) 2013  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
-# Local imports.
-from IPython.config.configurable import Configurable
-from IPython.utils.traitlets import Any, Instance, Type
-from IPython.kernel.kernelmanagerabc import (
-    ShellChannelABC, IOPubChannelABC,
-    HBChannelABC, StdInChannelABC,
-    KernelManagerABC
-)
-
-from .socket import DummySocket
-
-#-----------------------------------------------------------------------------
-# Channel classes
-#-----------------------------------------------------------------------------
-
-class InProcessChannel(object):
-    """Base class for in-process channels."""
-
-    def __init__(self, manager):
-        super(InProcessChannel, self).__init__()
-        self.manager = manager
-        self._is_alive = False
-
-    #--------------------------------------------------------------------------
-    # Channel interface
-    #--------------------------------------------------------------------------
-
-    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.')
-
-    #--------------------------------------------------------------------------
-    # InProcessChannel interface
-    #--------------------------------------------------------------------------
-
-    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 InProcessShellChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.ShellChannel` for docstrings."""
-
-    # flag for whether execute requests should be allowed to call raw_input
-    allow_stdin = True
-
-    #--------------------------------------------------------------------------
-    # ShellChannel interface
-    #--------------------------------------------------------------------------
-
-    def execute(self, code, silent=False, store_history=True,
-                user_variables=[], user_expressions={}, allow_stdin=None):
-        if allow_stdin is None:
-            allow_stdin = self.allow_stdin
-        content = dict(code=code, silent=silent, store_history=store_history,
-                       user_variables=user_variables,
-                       user_expressions=user_expressions,
-                       allow_stdin=allow_stdin)
-        msg = self.manager.session.msg('execute_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def complete(self, text, line, cursor_pos, block=None):
-        content = dict(text=text, line=line, block=block, cursor_pos=cursor_pos)
-        msg = self.manager.session.msg('complete_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def object_info(self, oname, detail_level=0):
-        content = dict(oname=oname, detail_level=detail_level)
-        msg = self.manager.session.msg('object_info_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def history(self, raw=True, output=False, hist_access_type='range', **kwds):
-        content = dict(raw=raw, output=output,
-                       hist_access_type=hist_access_type, **kwds)
-        msg = self.manager.session.msg('history_request', content)
-        self._dispatch_to_kernel(msg)
-        return msg['header']['msg_id']
-
-    def shutdown(self, restart=False):
-        # FIXME: What to do here?
-        raise NotImplementedError('Cannot shutdown in-process kernel')
-
-    #--------------------------------------------------------------------------
-    # Protected interface
-    #--------------------------------------------------------------------------
-
-    def _dispatch_to_kernel(self, msg):
-        """ Send a message to the kernel and handle a reply.
-        """
-        kernel = self.manager.kernel
-        if kernel is None:
-            raise RuntimeError('Cannot send request. No kernel exists.')
-
-        stream = DummySocket()
-        self.manager.session.send(stream, msg)
-        msg_parts = stream.recv_multipart()
-        kernel.dispatch_shell(stream, msg_parts)
-
-        idents, reply_msg = self.manager.session.recv(stream, copy=False)
-        self.call_handlers_later(reply_msg)
-
-
-class InProcessIOPubChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.IOPubChannel` for docstrings."""
-
-    def flush(self, timeout=1.0):
-        pass
-
-
-class InProcessStdInChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.StdInChannel` for docstrings."""
-
-    def input(self, string):
-        kernel = self.manager.kernel
-        if kernel is None:
-            raise RuntimeError('Cannot send input reply. No kernel exists.')
-        kernel.raw_input_str = string
-
-
-class InProcessHBChannel(InProcessChannel):
-    """See `IPython.kernel.kernelmanager.HBChannel` for docstrings."""
-
-    time_to_dead = 3.0
-
-    def __init__(self, *args, **kwds):
-        super(InProcessHBChannel, self).__init__(*args, **kwds)
-        self._pause = True
-
-    def pause(self):
-        self._pause = True
-
-    def unpause(self):
-        self._pause = False
-
-    def is_beating(self):
-        return not self._pause
-
+from IPython.utils.traitlets import Instance
+from IPython.kernel.managerabc import KernelManagerABC
+from IPython.kernel.manager import KernelManager
 
 #-----------------------------------------------------------------------------
 # Main kernel manager class
 #-----------------------------------------------------------------------------
 
-class InProcessKernelManager(Configurable):
+class InProcessKernelManager(KernelManager):
     """A manager for an in-process kernel.
 
     This class implements the interface of
     `IPython.kernel.kernelmanagerabc.KernelManagerABC` and allows
     (asynchronous) frontends to be used seamlessly with an in-process kernel.
 
     See `IPython.kernel.kernelmanager.KernelManager` for docstrings.
     """
 
-    # The Session to use for building messages.
-    session = Instance('IPython.kernel.zmq.session.Session')
-    def _session_default(self):
-        from IPython.kernel.zmq.session import Session
-        return Session(config=self.config)
-
     # The kernel process with which the KernelManager is communicating.
     kernel = Instance('IPython.kernel.inprocess.ipkernel.InProcessKernel')
 
-    # The classes to use for the various channels.
-    shell_channel_class = Type(InProcessShellChannel)
-    iopub_channel_class = Type(InProcessIOPubChannel)
-    stdin_channel_class = Type(InProcessStdInChannel)
-    hb_channel_class = Type(InProcessHBChannel)
-
-    # Protected traits.
-    _shell_channel = Any
-    _iopub_channel = Any
-    _stdin_channel = Any
-    _hb_channel = Any
-
-    #--------------------------------------------------------------------------
-    # Channel management methods.
-    #--------------------------------------------------------------------------
-
-    def start_channels(self, shell=True, iopub=True, stdin=True, hb=True):
-        if shell:
-            self.shell_channel.start()
-        if iopub:
-            self.iopub_channel.start()
-        if stdin:
-            self.stdin_channel.start()
-            self.shell_channel.allow_stdin = True
-        else:
-            self.shell_channel.allow_stdin = False
-        if hb:
-            self.hb_channel.start()
-
-    def stop_channels(self):
-        if self.shell_channel.is_alive():
-            self.shell_channel.stop()
-        if self.iopub_channel.is_alive():
-            self.iopub_channel.stop()
-        if self.stdin_channel.is_alive():
-            self.stdin_channel.stop()
-        if self.hb_channel.is_alive():
-            self.hb_channel.stop()
-
-    @property
-    def channels_running(self):
-        return (self.shell_channel.is_alive() or self.iopub_channel.is_alive() or
-                self.stdin_channel.is_alive() or self.hb_channel.is_alive())
-
-    @property
-    def shell_channel(self):
-        if self._shell_channel is None:
-            self._shell_channel = self.shell_channel_class(self)
-        return self._shell_channel
-
-    @property
-    def iopub_channel(self):
-        if self._iopub_channel is None:
-            self._iopub_channel = self.iopub_channel_class(self)
-        return self._iopub_channel
-
-    @property
-    def stdin_channel(self):
-        if self._stdin_channel is None:
-            self._stdin_channel = self.stdin_channel_class(self)
-        return self._stdin_channel
-
-    @property
-    def hb_channel(self):
-        if self._hb_channel is None:
-            self._hb_channel = self.hb_channel_class(self)
-        return self._hb_channel
-
     #--------------------------------------------------------------------------
-    # Kernel management methods:
+    # Kernel management methods
     #--------------------------------------------------------------------------
 
     def start_kernel(self, **kwds):
         from IPython.kernel.inprocess.ipkernel import InProcessKernel
         self.kernel = InProcessKernel()
-        self.kernel.frontends.append(self)
 
     def shutdown_kernel(self):
         self._kill_kernel()
 
     def restart_kernel(self, now=False, **kwds):
         self.shutdown_kernel()
         self.start_kernel(**kwds)
 
     @property
     def has_kernel(self):
         return self.kernel is not None
 
     def _kill_kernel(self):
-        self.kernel.frontends.remove(self)
         self.kernel = None
 
     def interrupt_kernel(self):
         raise NotImplementedError("Cannot interrupt in-process kernel.")
 
     def signal_kernel(self, signum):
         raise NotImplementedError("Cannot signal in-process kernel.")
 
     def is_alive(self):
         return True
 
 
 #-----------------------------------------------------------------------------
 # ABC Registration
 #-----------------------------------------------------------------------------
 
-ShellChannelABC.register(InProcessShellChannel)
-IOPubChannelABC.register(InProcessIOPubChannel)
-HBChannelABC.register(InProcessHBChannel)
-StdInChannelABC.register(InProcessStdInChannel)
 KernelManagerABC.register(InProcessKernelManager)

IPython/kernel/inprocess/tests/test_kernel.py

@@ -1,89 +1,91 b''
 #-------------------------------------------------------------------------------
 #  Copyright (C) 2012  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-------------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 from __future__ import print_function
 
 # Standard library imports
 from StringIO import StringIO
 import sys
 import unittest
 
 # Local imports
-from IPython.kernel.inprocess.blockingkernelmanager import \
-    BlockingInProcessKernelManager
+from IPython.kernel.inprocess.blocking import BlockingInProcessKernelClient
+from IPython.kernel.inprocess.manager import InProcessKernelManager
 from IPython.kernel.inprocess.ipkernel import InProcessKernel
 from IPython.testing.decorators import skipif_not_matplotlib
 from IPython.utils.io import capture_output
 from IPython.utils import py3compat
 
 #-----------------------------------------------------------------------------
 # Test case
 #-----------------------------------------------------------------------------
 
 class InProcessKernelTestCase(unittest.TestCase):
 
+    def setUp(self):
+        self.km = InProcessKernelManager()
+        self.km.start_kernel()
+        self.kc = BlockingInProcessKernelClient(kernel=self.km.kernel)
+        self.kc.start_channels()
+
     @skipif_not_matplotlib
     def test_pylab(self):
         """ Does pylab work in the in-process kernel?
         """
-        km = BlockingInProcessKernelManager()
-        km.start_kernel()
-        km.shell_channel.execute('%pylab')
-        msg = get_stream_message(km)
+        kc = self.kc
+        kc.execute('%pylab')
+        msg = get_stream_message(kc)
         self.assert_('Welcome to pylab' in msg['content']['data'])
 
     def test_raw_input(self):
         """ Does the in-process kernel handle raw_input correctly?
         """
-        km = BlockingInProcessKernelManager()
-        km.start_kernel()
-
         io = StringIO('foobar\n')
         sys_stdin = sys.stdin
         sys.stdin = io
         try:
             if py3compat.PY3:
-                km.shell_channel.execute('x = input()')
+                self.kc.execute('x = input()')
             else:
-                km.shell_channel.execute('x = raw_input()')
+                self.kc.execute('x = raw_input()')
         finally:
             sys.stdin = sys_stdin
-        self.assertEqual(km.kernel.shell.user_ns.get('x'), 'foobar')
+        self.assertEqual(self.km.kernel.shell.user_ns.get('x'), 'foobar')
 
     def test_stdout(self):
         """ Does the in-process kernel correctly capture IO?
         """
         kernel = InProcessKernel()
 
         with capture_output() as io:
             kernel.shell.run_cell('print("foo")')
         self.assertEqual(io.stdout, 'foo\n')
 
-        km = BlockingInProcessKernelManager(kernel=kernel)
-        kernel.frontends.append(km)
-        km.shell_channel.execute('print("bar")')
-        msg = get_stream_message(km)
+        kc = BlockingInProcessKernelClient(kernel=kernel)
+        kernel.frontends.append(kc)
+        kc.shell_channel.execute('print("bar")')
+        msg = get_stream_message(kc)
         self.assertEqual(msg['content']['data'], 'bar\n')
 
 #-----------------------------------------------------------------------------
 # Utility functions
 #-----------------------------------------------------------------------------
 
-def get_stream_message(kernel_manager, timeout=5):
+def get_stream_message(kernel_client, timeout=5):
     """ Gets a single stream message synchronously from the sub channel.
     """
     while True:
-        msg = kernel_manager.iopub_channel.get_msg(timeout=timeout)
+        msg = kernel_client.get_iopub_msg(timeout=timeout)
         if msg['header']['msg_type'] == 'stream':
             return msg
 
 
 if __name__ == '__main__':
     unittest.main()

IPython/kernel/inprocess/tests/test_kernelmanager.py

@@ -1,102 +1,112 b''
 #-------------------------------------------------------------------------------
 #  Copyright (C) 2012  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-------------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 from __future__ import print_function
 
 # Standard library imports
 import unittest
 
 # Local imports
-from IPython.kernel.inprocess.blockingkernelmanager import \
-    BlockingInProcessKernelManager
+from IPython.kernel.inprocess.blocking import BlockingInProcessKernelClient
 from IPython.kernel.inprocess.ipkernel import InProcessKernel
+from IPython.kernel.inprocess.manager import InProcessKernelManager
 
 #-----------------------------------------------------------------------------
 # Test case
 #-----------------------------------------------------------------------------
 
 class InProcessKernelManagerTestCase(unittest.TestCase):
 
-    def test_inteface(self):
+    def test_interface(self):
         """ Does the in-process kernel manager implement the basic KM interface?
         """
-        km = BlockingInProcessKernelManager()
-        self.assert_(not km.channels_running)
+        km = InProcessKernelManager()
         self.assert_(not km.has_kernel)
 
-        km.start_channels()
-        self.assert_(km.channels_running)
-
         km.start_kernel()
         self.assert_(km.has_kernel)
         self.assert_(km.kernel is not None)
 
+        kc = BlockingInProcessKernelClient(kernel=km.kernel)
+        self.assert_(not kc.channels_running)
+
+        kc.start_channels()
+        self.assert_(kc.channels_running)
+
         old_kernel = km.kernel
         km.restart_kernel()
         self.assert_(km.kernel is not None)
         self.assertNotEquals(km.kernel, old_kernel)
 
         km.shutdown_kernel()
         self.assert_(not km.has_kernel)
 
         self.assertRaises(NotImplementedError, km.interrupt_kernel)
         self.assertRaises(NotImplementedError, km.signal_kernel, 9)
 
-        km.stop_channels()
-        self.assert_(not km.channels_running)
+        kc.stop_channels()
+        self.assert_(not kc.channels_running)
 
     def test_execute(self):
         """ Does executing code in an in-process kernel work?
         """
-        km = BlockingInProcessKernelManager()
+        km = InProcessKernelManager()
         km.start_kernel()
-        km.shell_channel.execute('foo = 1')
+        kc = BlockingInProcessKernelClient(kernel=km.kernel)
+        kc.start_channels()
+        kc.execute('foo = 1')
         self.assertEquals(km.kernel.shell.user_ns['foo'], 1)
 
     def test_complete(self):
         """ Does requesting completion from an in-process kernel work?
         """
-        km = BlockingInProcessKernelManager()
+        km = InProcessKernelManager()
         km.start_kernel()
+        kc = BlockingInProcessKernelClient(kernel=km.kernel)
+        kc.start_channels()
         km.kernel.shell.push({'my_bar': 0, 'my_baz': 1})
-        km.shell_channel.complete('my_ba', 'my_ba', 5)
-        msg = km.shell_channel.get_msg()
-        self.assertEquals(msg['header']['msg_type'], 'complete_reply')
-        self.assertEquals(sorted(msg['content']['matches']),
+        kc.complete('my_ba', 'my_ba', 5)
+        msg = kc.get_shell_msg()
+        self.assertEqual(msg['header']['msg_type'], 'complete_reply')
+        self.assertEqual(sorted(msg['content']['matches']),
                           ['my_bar', 'my_baz'])
 
     def test_object_info(self):
         """ Does requesting object information from an in-process kernel work?
         """
-        km = BlockingInProcessKernelManager()
+        km = InProcessKernelManager()
         km.start_kernel()
+        kc = BlockingInProcessKernelClient(kernel=km.kernel)
+        kc.start_channels()
         km.kernel.shell.user_ns['foo'] = 1
-        km.shell_channel.object_info('foo')
-        msg = km.shell_channel.get_msg()
+        kc.object_info('foo')
+        msg = kc.get_shell_msg()
         self.assertEquals(msg['header']['msg_type'], 'object_info_reply')
         self.assertEquals(msg['content']['name'], 'foo')
         self.assertEquals(msg['content']['type_name'], 'int')
 
     def test_history(self):
         """ Does requesting history from an in-process kernel work?
         """
-        km = BlockingInProcessKernelManager()
+        km = InProcessKernelManager()
         km.start_kernel()
-        km.shell_channel.execute('%who')
-        km.shell_channel.history(hist_access_type='tail', n=1)
-        msg = km.shell_channel.get_msgs()[-1]
+        kc = BlockingInProcessKernelClient(kernel=km.kernel)
+        kc.start_channels()
+        kc.execute('%who')
+        kc.history(hist_access_type='tail', n=1)
+        msg = kc.shell_channel.get_msgs()[-1]
         self.assertEquals(msg['header']['msg_type'], 'history_reply')
         history = msg['content']['history']
         self.assertEquals(len(history), 1)
         self.assertEquals(history[0][2], '%who')
 
 
 if __name__ == '__main__':
     unittest.main()