libvirt/python/libvirt-override-virConnect.py
Adam Litke 12cd77a0c5 Asynchronous event for BlockPull completion
When an operation started by virDomainBlockPullAll completes (either with
success or with failure), raise an event to indicate the final status.  This
allows an API user to avoid polling on virDomainBlockPullInfo if they would
prefer to use the event mechanism.

* daemon/remote.c: Dispatch events to client
* include/libvirt/libvirt.h.in: Define event ID and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
  src/libvirt_private.syms: Extend API to handle the new event
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
  for block_stream completion and emit a libvirt block pull event
* src/remote/remote_driver.c: Receive and dispatch events to application
* src/remote/remote_protocol.x: Wire protocol definition for the event
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
  src/qemu/qemu_monitor_json.c: Watch for BLOCK_STREAM_COMPLETED event
  from QEMU monitor

Signed-off-by: Adam Litke <agl@us.ibm.com>
2011-06-14 22:48:42 -06:00

163 lines
6.0 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
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), opaque)
return 0
except AttributeError:
pass
def dispatchDomainEventRTCChangeCallback(self, dom, offset, cbData):
"""Dispatches events to python user domain RTC change event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), offset ,opaque)
return 0
except AttributeError:
pass
def dispatchDomainEventWatchdogCallback(self, dom, action, cbData):
"""Dispatches events to python user domain watchdog event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), action, opaque)
return 0
except AttributeError:
pass
def dispatchDomainEventIOErrorCallback(self, dom, srcPath, devAlias, action, cbData):
"""Dispatches events to python user domain IO error event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), srcPath, devAlias, action, opaque)
return 0
except AttributeError:
pass
def dispatchDomainEventIOErrorReasonCallback(self, dom, srcPath, devAlias, action, reason, cbData):
"""Dispatches events to python user domain IO error event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), srcPath, devAlias, action, reason, opaque)
return 0
except AttributeError:
pass
def dispatchDomainEventGraphicsCallback(self, dom, phase, localAddr, remoteAddr, authScheme, subject, cbData):
"""Dispatches events to python user domain graphics event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), phase, localAddr, remoteAddr, authScheme, subject, opaque)
return 0
except AttributeError:
pass
def dispatchDomainEventBlockPullCallback(self, dom, path, status, cbData):
"""Dispatches events to python user domain blockPull event callbacks
"""
try:
cb = cbData["cb"]
opaque = cbData["opaque"]
cb(self, virDomain(self, _obj=dom), path, status, opaque)
return 0
except AttributeError:
pass
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