def _render_publish_vars(action_node, action_parameters, execution_result,
previous_execution_results, chain_vars):
"""
If no output is specified on the action_node the output is the entire execution_result.
If any output is specified then only those variables are published as output of an
execution of this action_node.
The output variable can refer to a variable from the execution_result,
previous_execution_results or chain_vars.
"""
if not action_node.publish:
return {}
context = {}
context.update(action_parameters)
context.update({action_node.name: execution_result})
context.update(previous_execution_results)
context.update(chain_vars)
context.update({RESULTS_KEY: previous_execution_results})
context.update({SYSTEM_KV_PREFIX: KeyValueLookup()})
try:
rendered_result = jinja_utils.render_values(
mapping=action_node.publish, context=context)
except Exception as e:
key = getattr(e, 'key', None)
value = getattr(e, 'value', None)
msg = (
'Failed rendering value for publish parameter "%s" in task "%s" '
'(template string=%s): %s' %
(key, action_node.name, value, str(e)))
raise ParameterRenderingFailedException(msg)
return rendered_result
def _resolve_params(action_node, original_parameters, results, chain_vars,
chain_context):
# setup context with original parameters and the intermediate results.
context = {}
context.update(original_parameters)
context.update(results)
context.update(chain_vars)
context.update({RESULTS_KEY: results})
context.update({SYSTEM_SCOPE: KeyValueLookup(scope=SYSTEM_SCOPE)})
context.update({
DATASTORE_PARENT_SCOPE: {
SYSTEM_SCOPE: KeyValueLookup(scope=FULL_SYSTEM_SCOPE)
}
})
context.update({ACTION_CONTEXT_KV_PREFIX: chain_context})
try:
rendered_params = jinja_utils.render_values(
mapping=action_node.get_parameters(), context=context)
except Exception as e:
LOG.exception('Jinja rendering for parameter "%s" failed.' %
(e.key))
key = getattr(e, 'key', None)
value = getattr(e, 'value', None)
msg = (
'Failed rendering value for action parameter "%s" in task "%s" '
'(template string=%s): %s') % (key, action_node.name, value,
str(e))
raise ParameterRenderingFailedException(msg)
LOG.debug('Rendered params: %s: Type: %s', rendered_params,
type(rendered_params))
return rendered_params
def _resolve_params(action_node, original_parameters, results, chain_vars, chain_context):
# setup context with original parameters and the intermediate results.
context = {}
context.update(original_parameters)
context.update(results)
context.update(chain_vars)
context.update({RESULTS_KEY: results})
context.update({SYSTEM_KV_PREFIX: KeyValueLookup()})
context.update({ACTION_KV_PREFIX: chain_context})
try:
rendered_params = jinja_utils.render_values(mapping=action_node.params,
context=context)
except Exception as e:
LOG.exception('Jinja rendering failed.')
raise ParameterRenderingFailedException(e)
LOG.debug('Rendered params: %s: Type: %s', rendered_params, type(rendered_params))
return rendered_params