root / ncclient / manager.py @ 98f9e162
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# Copyright 2009 Shikhar Bhushan
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""This module is a thin layer of abstraction around the library. It exposes all core functionality."""
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import capabilities |
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import operations |
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import transport |
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import logging |
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logger = logging.getLogger('ncclient.manager')
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CAPABILITIES = [ |
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"urn:ietf:params:netconf:base:1.0",
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"urn:ietf:params:netconf:capability:writable-running:1.0",
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"urn:ietf:params:netconf:capability:candidate:1.0",
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"urn:ietf:params:netconf:capability:confirmed-commit:1.0",
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"urn:ietf:params:netconf:capability:rollback-on-error:1.0",
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"urn:ietf:params:netconf:capability:startup:1.0",
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"urn:ietf:params:netconf:capability:url:1.0?scheme=http,ftp,file,https,sftp",
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"urn:ietf:params:netconf:capability:validate:1.0",
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"urn:ietf:params:netconf:capability:xpath:1.0",
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"urn:liberouter:params:netconf:capability:power-control:1.0"
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"urn:ietf:params:netconf:capability:interleave:1.0"
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] |
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"""A list of URI's representing the client's capabilities. This is used during the initial capability exchange. Modify this if you need to announce some capability not already included."""
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OPERATIONS = { |
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"get": operations.Get,
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"get_config": operations.GetConfig,
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"edit_config": operations.EditConfig,
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"copy_config": operations.CopyConfig,
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"validate": operations.Validate,
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"commit": operations.Commit,
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"discard_changes": operations.DiscardChanges,
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"delete_config": operations.DeleteConfig,
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"lock": operations.Lock,
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"unlock": operations.Unlock,
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"close_session": operations.CloseSession,
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"kill_session": operations.KillSession,
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"poweroff_machine": operations.PoweroffMachine,
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"reboot_machine": operations.RebootMachine
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} |
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"""Dictionary of method names and corresponding :class:`~ncclient.operations.RPC` subclasses. It is used to lookup operations, e.g. `get_config` is mapped to :class:`~ncclient.operations.GetConfig`. It is thus possible to add additional operations to the :class:`Manager` API."""
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def connect_ssh(*args, **kwds): |
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"""Initialize a :class:`Manager` over the SSH transport. For documentation of arguments see :meth:`ncclient.transport.SSHSession.connect`.
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The underlying :class:`ncclient.transport.SSHSession` is created with :data:`CAPABILITIES`. It is first instructed to :meth:`~ncclient.transport.SSHSession.load_known_hosts` and then all the provided arguments are passed directly to its implementation of :meth:`~ncclient.transport.SSHSession.connect`.
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"""
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session = transport.SSHSession(capabilities.Capabilities(CAPABILITIES)) |
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session.load_known_hosts() |
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session.connect(*args, **kwds) |
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return Manager(session)
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connect = connect_ssh |
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"Same as :func:`connect_ssh`, since SSH is the default (and currently, the only) transport."
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class OpExecutor(type): |
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def __new__(cls, name, bases, attrs): |
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def make_wrapper(op_cls): |
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def wrapper(self, *args, **kwds): |
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return self.execute(op_cls, *args, **kwds) |
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wrapper.func_doc = op_cls.request.func_doc |
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return wrapper
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for op_name, op_cls in OPERATIONS.iteritems(): |
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attrs[op_name] = make_wrapper(op_cls) |
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return super(OpExecutor, cls).__new__(cls, name, bases, attrs) |
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class Manager(object): |
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"""For details on the expected behavior of the operations and their parameters refer to :rfc:`4741`.
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Manager instances are also context managers so you can use it like this::
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with manager.connect("host") as m:
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# do your stuff
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... or like this::
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m = manager.connect("host")
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try:
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# do your stuff
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finally:
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m.close_session()
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"""
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__metaclass__ = OpExecutor |
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def __init__(self, session, timeout=30): |
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self._session = session
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self._async_mode = False |
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self._timeout = timeout
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self._raise_mode = operations.RaiseMode.ALL
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def __enter__(self): |
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return self |
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def __exit__(self, *args): |
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self.close_session()
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return False |
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def __set_timeout(self, timeout): |
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self._timeout = timeout
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def __set_async_mode(self, mode): |
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self._async_mode = mode
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def __set_raise_mode(self, mode): |
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assert(choice in (operations.RaiseMode.NONE, operations.RaiseMode.ERRORS, operations.RaiseMode.ALL)) |
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self._raise_mode = mode
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def execute(self, cls, *args, **kwds): |
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return cls(self._session, |
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async=self._async_mode,
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timeout=self._timeout,
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raise_mode=self._raise_mode).request(*args, **kwds)
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def locked(self, target): |
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"""Returns a context manager for a lock on a datastore, where *target* is the name of the configuration datastore to lock, e.g.::
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with m.locked("running"):
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# do your stuff
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... instead of::
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m.lock("running")
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try:
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# do your stuff
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finally:
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m.unlock("running")
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"""
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return operations.LockContext(self._session, target) |
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@property
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def client_capabilities(self): |
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":class:`~ncclient.capabilities.Capabilities` object representing the client's capabilities."
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return self._session._client_capabilities |
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@property
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def server_capabilities(self): |
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":class:`~ncclient.capabilities.Capabilities` object representing the server's capabilities."
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return self._session._server_capabilities |
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@property
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def session_id(self): |
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"`session-id` assigned by the NETCONF server."
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return self._session.id |
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@property
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def connected(self): |
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"Whether currently connected to the NETCONF server."
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return self._session.connected |
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async_mode = property(fget=lambda self: self._async_mode, fset=__set_async_mode) |
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"Specify whether operations are executed asynchronously (`True`) or synchronously (`False`) (the default)."
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timeout = property(fget=lambda self: self._timeout, fset=__set_timeout) |
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"Specify the timeout for synchronous RPC requests."
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raise_mode = property(fget=lambda self: self._raise_mode, fset=__set_raise_mode) |
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"Specify which errors are raised as :exc:`~ncclient.operations.RPCError` exceptions. Valid values are the constants defined in :class:`~ncclient.operations.RaiseMode`. The default value is :attr:`~ncclient.operations.RaiseMode.ALL`."
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