Synnefo

@transaction.commit_on_success

def process_progress_update(vm, pr_percentage):

    if not type(pr_percentage) == int:

        raise TypeError("Percentage not an integer")

    if pr_percentage < 0 or pr_percentage > 100:

        raise Exception("Percentage not in range (0, 100)")

    last_update = vm.buildpercentage

    if last_update > pr_percentage:

        raise Exception("Build percentage should increase monotonically" \

                        " (old=%d, new=%d)"%(last_update, pr_percentage))

    if not vm.operstate == 'BUILD':

        raise VirtualMachine.IllegalState("VM is not in building state")

    vm.buildpercentage = pr_percentage

    vm.save()