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https://github.com/virt-manager/virt-manager.git
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f088537798
Have a separate class for tracking the connection list, and emitting conn-added and conn-removed signals. It exists as a singleton instance that UI classes can talk directly to
84 lines
2.4 KiB
Python
84 lines
2.4 KiB
Python
#
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# Copyright (C) 2018 Red Hat, Inc.
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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 2 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, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301 USA.
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#
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import logging
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from gi.repository import GObject
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from .baseclass import vmmGObject
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from .connection import vmmConnection
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class vmmConnectionManager(vmmGObject):
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"""
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Tracks the list of connections, emits conn-added and conn-removed
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"""
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__gsignals__ = {
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"conn-added": (GObject.SignalFlags.RUN_FIRST, None, [object]),
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"conn-removed": (GObject.SignalFlags.RUN_FIRST, None, [str]),
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}
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_instance = None
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@classmethod
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def get_instance(cls, *args, **kwargs):
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if not cls._instance:
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cls._instance = vmmConnectionManager(*args, **kwargs)
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return cls._instance
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def __init__(self):
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vmmGObject.__init__(self)
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self._conns = {}
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# Load URIs from gsettings
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for uri in self.config.get_conn_uris():
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self.add_conn(uri)
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def _cleanup(self):
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for conn in self._conns.values():
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uri = conn.get_uri()
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try:
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self.emit("conn-removed", uri)
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conn.cleanup()
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except Exception:
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logging.exception("Error cleaning up conn=%s", uri)
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self._conns = {}
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@property
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def conns(self):
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return self._conns.copy()
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def add_conn(self, uri):
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if uri in self._conns:
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return self._conns[uri]
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conn = vmmConnection(uri)
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self._conns[uri] = conn
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self.config.add_conn_uri(uri)
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self.emit("conn-added", conn)
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return conn
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def remove_conn(self, uri):
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if uri not in self._conns:
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return
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conn = self._conns.pop(uri)
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self.config.remove_conn_uri(uri)
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self.emit("conn-removed", uri)
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conn.cleanup()
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