OpenStack Study: __init__.py

**** CubicPower OpenStack Study ****

def _get_compute_api_class_name():

    """Returns the name of compute API class."""

    cell_type = nova.cells.opts.get_cell_type()

    return CELL_TYPE_TO_CLS_NAME[cell_type]

**** CubicPower OpenStack Study ****

def API(*args, **kwargs):

    importutils = nova.openstack.common.importutils

    class_name = _get_compute_api_class_name()

    return importutils.import_object(class_name, *args, **kwargs)

**** CubicPower OpenStack Study ****

def HostAPI(*args, **kwargs):

    """Returns the 'HostAPI' class from the same module as the configured

    compute api

    """

    importutils = nova.openstack.common.importutils

    compute_api_class_name = _get_compute_api_class_name()

    compute_api_class = importutils.import_class(compute_api_class_name)

    class_name = compute_api_class.__module__ + ".HostAPI"

    return importutils.import_object(class_name, *args, **kwargs)

**** CubicPower OpenStack Study ****

def InstanceActionAPI(*args, **kwargs):

    """Returns the 'InstanceActionAPI' class from the same module as the

    configured compute api.

    """

    importutils = nova.openstack.common.importutils

    compute_api_class_name = _get_compute_api_class_name()

    compute_api_class = importutils.import_class(compute_api_class_name)

    class_name = compute_api_class.__module__ + ".InstanceActionAPI"

    return importutils.import_object(class_name, *args, **kwargs)