def check_exists(self, id_):
"""Determines if a VM exists, given a name"""
try:
ArgumentValidator.validate_id(id_, VirtualMachine)
except (MCVirtTypeError, InvalidVirtualMachineNameException):
return False
return id_ in self.get_all_vm_ids()
def get_virtual_machine_by_id(self, vm_id):
"""Obtain a VM object, based on VM name"""
# Validate VM ID
ArgumentValidator.validate_id(vm_id, VirtualMachine)
# Check that the domain exists
if not self.check_exists(vm_id):
raise VirtualMachineDoesNotExistException(
'Error: Virtual Machine does not exist: %s' % vm_id
)
# Determine if VM object has been cached
if vm_id not in Factory.CACHED_OBJECTS:
# If not, create object, register with pyro
# and store in cached object dict
vm_object = VirtualMachine(vm_id)
self._register_object(vm_object)
vm_object.initialise()
Factory.CACHED_OBJECTS[vm_id] = vm_object
# Return the cached object
return Factory.CACHED_OBJECTS[vm_id]