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96c5551ace
These test that command lines are parsed to correct Command arguments. Includes some tests for interactive prompts. To make this possible cli.run is broken up into several pieces.
147 lines
4.7 KiB
Python
147 lines
4.7 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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#
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# Copyright (C) 2008 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Base classes for all backed-end plugins.
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"""
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import threading
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import plugable
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import os
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from errors import PublicError, InternalError, CommandError
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from request import context, Connection, destroy_context
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class Backend(plugable.Plugin):
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"""
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Base class for all backend plugins.
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"""
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class Connectible(Backend):
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"""
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Base class for backend plugins that create connections.
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In addition to the nicety of providing a standard connection API, all
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backend plugins that create connections should use this base class so that
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`request.destroy_context()` can properly close all open connections.
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"""
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def __init__(self, shared_instance=True):
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Backend.__init__(self)
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if shared_instance:
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self.id = self.name
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else:
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self.id = '%s_%s' % (self.name, str(id(self)))
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def connect(self, *args, **kw):
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"""
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Create thread-local connection.
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"""
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if hasattr(context, self.id):
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raise StandardError(
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"connect: 'context.%s' already exists in thread %r" % (
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self.id, threading.currentThread().getName()
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)
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)
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conn = self.create_connection(*args, **kw)
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setattr(context, self.id, Connection(conn, self.disconnect))
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assert self.conn is conn
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self.debug('Created connection context.%s' % self.id)
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def create_connection(self, *args, **kw):
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raise NotImplementedError('%s.create_connection()' % self.id)
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def disconnect(self):
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if not hasattr(context, self.id):
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raise StandardError(
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"disconnect: 'context.%s' does not exist in thread %r" % (
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self.id, threading.currentThread().getName()
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)
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)
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self.destroy_connection()
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delattr(context, self.id)
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self.debug('Destroyed connection context.%s' % self.id)
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def destroy_connection(self):
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raise NotImplementedError('%s.destroy_connection()' % self.id)
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def isconnected(self):
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"""
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Return ``True`` if thread-local connection on `request.context` exists.
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"""
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return hasattr(context, self.id)
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def __get_conn(self):
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"""
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Return thread-local connection.
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"""
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if not hasattr(context, self.id):
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raise AttributeError('no context.%s in thread %r' % (
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self.id, threading.currentThread().getName())
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)
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return getattr(context, self.id).conn
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conn = property(__get_conn)
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class Executioner(Backend):
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def create_context(self, ccache=None, client_ip=None):
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"""
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client_ip: The IP address of the remote client.
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"""
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if ccache is not None:
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os.environ["KRB5CCNAME"] = ccache
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if self.env.in_server:
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self.Backend.ldap2.connect(ccache=ccache)
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else:
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self.Backend.xmlclient.connect(verbose=(self.env.verbose >= 2),
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fallback=self.env.fallback, delegate=self.env.delegate)
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if client_ip is not None:
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setattr(context, "client_ip", client_ip)
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def destroy_context(self):
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destroy_context()
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def execute(self, _name, *args, **options):
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error = None
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try:
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if _name not in self.Command:
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raise CommandError(name=_name)
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result = self.Command[_name](*args, **options)
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except PublicError, e:
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error = e
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except StandardError, e:
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self.exception(
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'non-public: %s: %s', e.__class__.__name__, str(e)
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)
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error = InternalError()
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except Exception, e:
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self.exception(
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'unhandled exception: %s: %s', e.__class__.__name__, str(e)
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)
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error = InternalError()
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destroy_context()
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if error is None:
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return result
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assert isinstance(error, PublicError)
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raise error #pylint: disable=E0702
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