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https://github.com/xen-project/xen.git
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Tom Wilkie
1341c96dca
Also clean up some handling of uuids and refs in xm signed-of-by: Tom Wilkie <tom.wilkie@gmail.com>
127 lines
4.3 KiB
Python
127 lines
4.3 KiB
Python
#!/usr/bin/python
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#============================================================================
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of version 2.1 of the GNU Lesser General Public
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# License as published by the Free Software Foundation.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#============================================================================
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# Copyright (C) 2007 Tom Wilkie <tom.wilkie@gmail.com>
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#============================================================================
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"""
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Base class for all XenAPI classes
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"""
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from xen.xend.XendError import *
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from xen.xend import XendAPIStore
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class XendBase:
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#
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# These functions describe the object, and what is exposed via the API
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#
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def getClass(self):
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return "Base"
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def getAttrRO(self):
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return ['uuid']
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def getAttrRW(self):
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return []
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def getAttrInst(self):
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return []
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def getMethods(self):
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return ["get_record"]
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def getFuncs(self):
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return ["get_all", "get_by_uuid", "get_all_records"]
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getClass = classmethod(getClass)
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getAttrRO = classmethod(getAttrRO)
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getAttrRW = classmethod(getAttrRW)
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getAttrInst = classmethod(getAttrInst)
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getMethods = classmethod(getMethods)
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getFuncs = classmethod(getFuncs)
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def __init__(self, uuid, record):
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self.__uuid = uuid
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# First check this class implements all the correct methods:
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for attr_ro in self.getAttrRO() + self.getAttrRW():
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if not hasattr(self, "get_%s" % attr_ro):
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raise ImplementationError(self.getClass(),
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"get_%s" % attr_ro)
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for attr_rw in self.getAttrRW():
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if not hasattr(self, "set_%s" % attr_rw):
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raise ImplementationError(self.getClass(),
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"set_%s" % attr_rw)
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for method in self.getMethods():
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if not hasattr(self, method):
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raise ImplementationError(self.getClass(),
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method)
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for func in self.getFuncs():
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if not hasattr(self.__class__, func):
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raise ImplementationError(self.getClass(),
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func)
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# Next check that the class is being created with the correct
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# parameters
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if not isinstance(record, dict):
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raise CreateUnspecifiedAttributeError(
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"record" , self.getClass())
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for attr_inst in self.getAttrInst():
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if attr_inst not in record:
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raise CreateUnspecifiedAttributeError(
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attr_inst, self.getClass())
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setattr(self, attr_inst, record[attr_inst])
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# Finally register it
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XendAPIStore.register(uuid, self.getClass(), self)
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def destroy(self):
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XendAPIStore.deregister(self.get_uuid(), self.getClass())
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def get_uuid(self):
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return self.__uuid
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def get_record(self):
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keys = self.getAttrRO() + self.getAttrRW()
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return dict([(key, getattr(self, "get_%s" % key)())
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for key in keys])
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#
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# Class methods
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#
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def get_all(cls):
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return XendAPIStore.get_all_uuid(cls.getClass())
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def get_by_uuid(cls, uuid):
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# Sanity check the uuid is one of us
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me = XendAPIStore.get(uuid, cls.getClass())
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if me is not None and me.getClass() == cls.getClass():
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# In OSS, ref == uuid
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return uuid
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else:
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raise "Big Error.. TODO!"
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def get_all_records(cls):
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return dict([(inst.get_uuid(), inst.get_record())
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for inst in XendAPIStore.get_all(cls.getClass())])
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get_all = classmethod(get_all)
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get_by_uuid = classmethod(get_by_uuid)
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get_all_records = classmethod(get_all_records)
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