8a73da20fd
* Fix get task properties, get task in DSL * Evaluating task on success/error/finish properties in engine: - evaluate YAQL conditions - schedule tasks * Unit tests for handling success/error/finish * For real work with context there is need to store it somewhere Implements: blueprint schedule-tasks-after-completion Change-Id: Ia9c34e755055ff0273dcd79a314858dbfbcc2fa9
117 lines
3.9 KiB
Python
117 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2013 - Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import yaml
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from yaml import error
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class Parser(object):
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"""Mistral DSL parser.
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Loads a workbook definition in YAML format as described in Mistral DSL
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specification and provides various methods to access DSL entities like
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tasks and actions in a form of dictionary.
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"""
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def __init__(self, workbook_definition):
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try:
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self.doc = yaml.safe_load(workbook_definition)
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except error.YAMLError as exc:
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raise RuntimeError("Definition could not be parsed: %s\n" % exc)
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def get_services(self):
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services = []
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for service_name in self.doc.get("Services", []):
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services.append(self.doc["Services"][service_name])
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return services
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def get_service(self, service_name):
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return self.doc["Services"].get(service_name, {})
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def get_events(self):
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events_from_doc = self.doc["Workflow"].get("events", None)
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if not events_from_doc:
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return []
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events = []
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for name in events_from_doc:
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event_dict = {'name': name}
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event_dict.update(events_from_doc[name])
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events.append(event_dict)
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return events
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def get_tasks(self):
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tasks = self.doc.get("Workflow", {}).get("tasks", {})
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for task_name, task_dsl in tasks.iteritems():
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task_dsl["service_name"] = task_dsl["action"].split(':')[0]
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req = task_dsl.get("requires")
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if req and isinstance(req, list):
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task_dsl["requires"] = dict(zip(req, ['']*len(req)))
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return tasks
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def get_task(self, task_name):
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task = self.get_tasks().get(task_name, {})
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if task:
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task['name'] = task_name
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return task
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def get_task_dsl_property(self, task_name, property_name):
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task_dsl = self.get_task(task_name)
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return task_dsl.get(property_name)
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def get_task_on_error(self, task_name):
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task = self.get_task_dsl_property(task_name, "on-error")
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if task:
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return task if isinstance(task, dict) else {task: ''}
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return None
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def get_task_on_success(self, task_name):
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task = self.get_task_dsl_property(task_name, "on-success")
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if task:
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return task if isinstance(task, dict) else {task: ''}
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return None
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def get_task_on_finish(self, task_name):
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task = self.get_task_dsl_property(task_name, "on-finish")
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if task:
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return task if isinstance(task, dict) else {task: ''}
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return None
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def get_task_input(self, task_name):
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return self.get_task_dsl_property(task_name, "input")
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def get_action(self, task_action_name):
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if task_action_name.find(":") == -1:
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return {}
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service_name = task_action_name.split(':')[0]
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action_name = task_action_name.split(':')[1]
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action = self.get_service(service_name)['actions'][action_name]
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return action
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def get_actions(self, service_name):
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service = self.get_service(service_name)
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return service.get('actions', [])
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def get_service_names(self):
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names = []
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for name in self.doc['Services']:
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names.append(name)
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return names
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def get_event_task_name(self, event_name):
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event = self.doc["Workflow"]["events"].get(event_name)
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return event.get('tasks') if event else ""
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