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#!/usr/bin/env python
# Contributors Listed Below - COPYRIGHT 2015
# [+] International Business Machines Corp.
#
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied. See the License for the specific language governing
# permissions and limitations under the License.
import sys
import dbus
import dbus.service
import dbus.mainloop.glib
import gobject
from OpenBMCMapper import Path, IntrospectionParser, PathTree
import OpenBMCMapper
class ObjectMapper(dbus.service.Object):
def __init__(self, bus, path,
name_match = OpenBMCMapper.org_dot_openbmc_match,
intf_match = OpenBMCMapper.org_dot_openbmc_match):
super(ObjectMapper, self).__init__(bus.dbus, path)
self.cache = PathTree()
self.bus = bus
self.name_match = name_match
self.intf_match = intf_match
self.tag_match = OpenBMCMapper.ListMatch(['children', 'interface'])
self.service = None
gobject.idle_add(self.discover)
self.bus.dbus.add_signal_receiver(self.bus_handler,
dbus_interface = dbus.BUS_DAEMON_IFACE,
signal_name = 'NameOwnerChanged')
self.bus.dbus.add_signal_receiver(self.interfaces_added_handler,
dbus_interface = dbus.BUS_DAEMON_IFACE + '.ObjectManager',
signal_name = 'InterfaceesAdded',
sender_keyword = 'sender')
self.bus.dbus.add_signal_receiver(self.interfaces_removed_handler,
dbus_interface = dbus.BUS_DAEMON_IFACE + '.ObjectManager',
signal_name = 'InterfacesRemoved',
sender_keyword = 'sender')
def discovery_pending(self):
return not bool(self.service)
def interfaces_added_handler(self, path, iprops, **kw):
if self.discovery_pending():
return
matches = [ x for x in iprops.iterkeys() if self.intf_match(x) ]
d = self.cache.setdefault(path, {})
d[path].setdefault(kw['sender'], []).extend(matches)
self.cache[path] = d
def interfaces_removed_handler(self, path, interfaces, **kw):
if self.discovery_pending():
return
item = self.cache[path]
name = kw['sender']
for x in interfaces:
item[name].remove(x)
# remove the owner if there aren't any interfaces left
if not item[name]:
del item[name]
# update if interfaces remain
if item:
self.cache[path] = item
# mark for removal if no interfaces remain
elif self.cache.get_children(item):
self.cache.demote(item)
# delete the entire path if everything is gone
else:
del self.cache[path]
def process_new_owner(self, name):
# unique name
return self.discover([ IntrospectionParser(name,
self.bus.dbus, self.tag_match, self.intf_match) ])
def process_old_owner(self, name):
for x,y in self.cache.dataitems():
if name not in y:
continue
del y[name]
if y:
self.cache[x] = y
elif self.cache.get_children(x):
self.cache.demote(x)
else:
del self.cache[x]
def bus_handler(self, service, old, new):
if self.discovery_pending() or \
not self.name_match(service):
return
if new:
self.process_new_owner(new)
if old:
self.process_old_owner(old)
def add_interfaces(self, path, owner, interfaces):
d = self.cache.setdefault(path, { })
d.setdefault(owner, []).extend(interfaces)
self.cache[path] = d
def add_items(self, owner, bus_items):
for x,y in bus_items.iteritems():
self.add_interfaces(x, owner, y['interfaces'])
def discover(self, owners = None):
if not owners:
owners = [ IntrospectionParser(x, self.bus.dbus,
self.tag_match, self.intf_match) \
for x in self.bus.get_owner_names(self.name_match) ]
for o in owners:
self.add_items(o.name, o.introspect())
if self.discovery_pending():
print "ObjectMapper discovery complete..."
self.service = dbus.service.BusName(
OpenBMCMapper.MAPPER_NAME, self.bus.dbus)
@dbus.service.method(OpenBMCMapper.MAPPER_IFACE, 's', 'a{sas}')
def GetObject(self, path):
return self.cache[path]
@dbus.service.method(OpenBMCMapper.MAPPER_IFACE, 'si', 'as')
def GetSubTreePaths(self, path, depth):
return self.cache.iterkeys(path, depth)
@dbus.service.method(OpenBMCMapper.MAPPER_IFACE, 'si', 'a{sa{sas}}')
def GetSubTree(self, path, depth):
return { x:y for x, y in self.cache.dataitems(path, depth) }
class BusWrapper:
def __init__(self, bus):
self.dbus = bus
def get_service_names(self, match):
# these are well known names
return [ x for x in self.dbus.list_names() \
if match(x) and x != OpenBMCMapper.MAPPER_NAME ]
def get_owner_names(self, match):
# these are unique connection names
return list( set( [ self.dbus.get_name_owner(x) \
for x in self.get_service_names(match) ] ) )
if __name__ == '__main__':
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
o = ObjectMapper(BusWrapper(bus), OpenBMCMapper.MAPPER_PATH)
loop = gobject.MainLoop()
loop.run()
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