create_request()

Complexity

Conditions

12

Size

Total Lines

79

Duplication

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Ratio	0 %

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0

# Licensed to the StackStorm, Inc ('StackStorm') under one or more
def create_request(liveaction):
    """
    Create an action execution.

    :return: (liveaction, execution)
    :rtype: tuple
    """
    # Use the user context from the parent action execution. Subtasks in a workflow
    # action can be invoked by a system user and so we want to use the user context
    # from the original workflow action.
    parent_context = executions.get_parent_context(liveaction)
    if parent_context:
        parent_user = parent_context.get('user', None)
        if parent_user:
            liveaction.context['user'] = parent_user

    # Validate action.
    action_db = action_utils.get_action_by_ref(liveaction.action)
    if not action_db:
        raise ValueError('Action "%s" cannot be found.' % liveaction.action)
    if not action_db.enabled:
        raise ValueError('Unable to execute. Action "%s" is disabled.' % liveaction.action)

    runnertype_db = action_utils.get_runnertype_by_name(action_db.runner_type['name'])

    if not hasattr(liveaction, 'parameters'):
        liveaction.parameters = dict()

    # Validate action parameters.
    schema = util_schema.get_schema_for_action_parameters(action_db)
    validator = util_schema.get_validator()
    util_schema.validate(liveaction.parameters, schema, validator, use_default=True,
                         allow_default_none=True)

    # validate that no immutable params are being overriden. Although possible to
    # ignore the override it is safer to inform the user to avoid surprises.
    immutables = _get_immutable_params(action_db.parameters)
    immutables.extend(_get_immutable_params(runnertype_db.runner_parameters))
    overridden_immutables = [p for p in six.iterkeys(liveaction.parameters) if p in immutables]
    if len(overridden_immutables) > 0:
        raise ValueError('Override of immutable parameter(s) %s is unsupported.'
                         % str(overridden_immutables))

    # Set notification settings for action.
    # XXX: There are cases when we don't want notifications to be sent for a particular
    # execution. So we should look at liveaction.parameters['notify']
    # and not set liveaction.notify.
    if not _is_notify_empty(action_db.notify):
        liveaction.notify = action_db.notify

    # Write to database and send to message queue.
    liveaction.status = action_constants.LIVEACTION_STATUS_REQUESTED
    liveaction.start_timestamp = date_utils.get_datetime_utc_now()

    # Set the "action_is_workflow" attribute
    liveaction.action_is_workflow = action_db.is_workflow()

    # Publish creation after both liveaction and actionexecution are created.
    liveaction = LiveAction.add_or_update(liveaction, publish=False)

    # Get trace_db if it exists. This could throw. If it throws, we have to cleanup
    # liveaction object so we don't see things in requested mode.
    trace_db = None
    try:
        _, trace_db = trace_service.get_trace_db_by_live_action(liveaction)
    except StackStormDBObjectNotFoundError as e:
        _cleanup_liveaction(liveaction)
        raise TraceNotFoundException(str(e))

    execution = executions.create_execution_object(liveaction, publish=False)

    if trace_db:
        trace_service.add_or_update_given_trace_db(
            trace_db=trace_db,
            action_executions=[
                trace_service.get_trace_component_for_action_execution(execution, liveaction)
            ])

    return liveaction, execution