libvirt/python/libvirt-override-virConnect.py
Daniel P. Berrange 7ed6d7dda7 Define public API for receiving guest memory balloon events
When the guest changes its memory balloon applications may want
to know what the new value is, without having to periodically
poll on XML / domain info. Introduce a "balloon change" event
to let apps see this

* include/libvirt/libvirt.h.in: Define the
  virConnectDomainEventBalloonChangeCallback callback
  and VIR_DOMAIN_EVENT_ID_BALLOON_CHANGE constant
* python/libvirt-override-virConnect.py,
  python/libvirt-override.c: Wire up helpers for new event
* daemon/remote.c: Helper for serializing balloon event
* examples/domain-events/events-c/event-test.c,
  examples/domain-events/events-python/event-test.py: Add
  example of balloon event usage
* src/conf/domain_event.c, src/conf/domain_event.h: Handling
  of balloon events
* src/remote/remote_driver.c: Add handler of balloon events
* src/remote/remote_protocol.x: Define wire protocol for
  balloon events
* src/remote_protocol-structs: Likewise.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-07-14 16:02:26 +08:00

209 lines
7.8 KiB
Python

def __del__(self):
try:
for cb,opaque in self.domainEventCallbacks.items():
del self.domainEventCallbacks[cb]
del self.domainEventCallbacks
libvirtmod.virConnectDomainEventDeregister(self._o, self)
except AttributeError:
pass
if self._o != None:
libvirtmod.virConnectClose(self._o)
self._o = None
def domainEventDeregister(self, cb):
"""Removes a Domain Event Callback. De-registering for a
domain callback will disable delivery of this event type """
try:
del self.domainEventCallbacks[cb]
if len(self.domainEventCallbacks) == 0:
del self.domainEventCallbacks
ret = libvirtmod.virConnectDomainEventDeregister(self._o, self)
if ret == -1: raise libvirtError ('virConnectDomainEventDeregister() failed', conn=self)
except AttributeError:
pass
def domainEventRegister(self, cb, opaque):
"""Adds a Domain Event Callback. Registering for a domain
callback will enable delivery of the events """
try:
self.domainEventCallbacks[cb] = opaque
except AttributeError:
self.domainEventCallbacks = {cb:opaque}
ret = libvirtmod.virConnectDomainEventRegister(self._o, self)
if ret == -1: raise libvirtError ('virConnectDomainEventRegister() failed', conn=self)
def _dispatchDomainEventCallbacks(self, dom, event, detail):
"""Dispatches events to python user domain event callbacks
"""
try:
for cb,opaque in self.domainEventCallbacks.items():
cb(self,dom,event,detail,opaque)
return 0
except AttributeError:
pass
def _dispatchDomainEventLifecycleCallback(self, dom, event, detail, cbData):
"""Dispatches events to python user domain lifecycle event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), event, detail, opaque)
return 0
def _dispatchDomainEventGenericCallback(self, dom, cbData):
"""Dispatches events to python user domain generic event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), opaque)
return 0
def _dispatchDomainEventRTCChangeCallback(self, dom, offset, cbData):
"""Dispatches events to python user domain RTC change event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), offset ,opaque)
return 0
def _dispatchDomainEventWatchdogCallback(self, dom, action, cbData):
"""Dispatches events to python user domain watchdog event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), action, opaque)
return 0
def _dispatchDomainEventIOErrorCallback(self, dom, srcPath, devAlias,
action, cbData):
"""Dispatches events to python user domain IO error event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), srcPath, devAlias, action, opaque)
return 0
def _dispatchDomainEventIOErrorReasonCallback(self, dom, srcPath,
devAlias, action, reason,
cbData):
"""Dispatches events to python user domain IO error event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), srcPath, devAlias, action,
reason, opaque)
return 0
def _dispatchDomainEventGraphicsCallback(self, dom, phase, localAddr,
remoteAddr, authScheme, subject,
cbData):
"""Dispatches events to python user domain graphics event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), phase, localAddr, remoteAddr,
authScheme, subject, opaque)
return 0
def dispatchDomainEventBlockPullCallback(self, dom, path, type, status, cbData):
"""Dispatches events to python user domain blockJob event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), path, type, status, opaque)
return 0
except AttributeError:
pass
def _dispatchDomainEventDiskChangeCallback(self, dom, oldSrcPath, newSrcPath, devAlias, reason, cbData):
"""Dispatches event to python user domain diskChange event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), oldSrcPath, newSrcPath, devAlias, reason, opaque)
return 0;
def _dispatchDomainEventTrayChangeCallback(self, dom, devAlias, reason, cbData):
"""Dispatches event to python user domain trayChange event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), devAlias, reason, opaque)
return 0;
def _dispatchDomainEventPMWakeupCallback(self, dom, reason, cbData):
"""Dispatches event to python user domain pmwakeup event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), reason, opaque)
return 0;
def _dispatchDomainEventPMSuspendCallback(self, dom, reason, cbData):
"""Dispatches event to python user domain pmsuspend event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), reason, opaque)
return 0;
def _dispatchDomainEventBalloonChangeCallback(self, dom, actual, cbData):
"""Dispatches events to python user domain balloon change event callbacks
"""
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), actual, opaque)
return 0
def domainEventDeregisterAny(self, callbackID):
"""Removes a Domain Event Callback. De-registering for a
domain callback will disable delivery of this event type """
try:
ret = libvirtmod.virConnectDomainEventDeregisterAny(self._o, callbackID)
if ret == -1: raise libvirtError ('virConnectDomainEventDeregisterAny() failed', conn=self)
del self.domainEventCallbackID[callbackID]
except AttributeError:
pass
def domainEventRegisterAny(self, dom, eventID, cb, opaque):
"""Adds a Domain Event Callback. Registering for a domain
callback will enable delivery of the events """
if not hasattr(self, 'domainEventCallbackID'):
self.domainEventCallbackID = {}
cbData = { "cb": cb, "conn": self, "opaque": opaque }
if dom is None:
ret = libvirtmod.virConnectDomainEventRegisterAny(self._o, None, eventID, cbData)
else:
ret = libvirtmod.virConnectDomainEventRegisterAny(self._o, dom._o, eventID, cbData)
if ret == -1:
raise libvirtError ('virConnectDomainEventRegisterAny() failed', conn=self)
self.domainEventCallbackID[ret] = opaque
return ret
def listAllDomains(self, flags):
"""List all domains and returns a list of domain objects"""
ret = libvirtmod.virConnectListAllDomains(self._o, flags)
if ret is None:
raise libvirtError("virConnectListAllDomains() failed", conn=self)
retlist = list()
for domptr in ret:
retlist.append(virDomain(self, _obj=domptr))
return retlist