| #!/usr/bin/env python3 |
| # -*- encoding: utf-8 -*- |
| |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| ''' metadatahandler.py ''' |
| import traceback |
| import tornado.gen |
| import tornado.web |
| |
| from heron.common.src.python.utils.log import Log |
| from heron.tools.tracker.src.python.handlers import BaseHandler |
| |
| # pylint: disable=attribute-defined-outside-init |
| class MetaDataHandler(BaseHandler): |
| """ |
| URL - /topologies/metadata |
| Parameters: |
| - cluster (required) |
| - environ (required) |
| - role - (optional) Role used to submit the topology. |
| - topology (required) name of the requested topology |
| |
| The response JSON is a dictionary with all the |
| static properties of a topology. Runtime information |
| is available from /topologies/runtimestate. |
| |
| Example JSON response: |
| { |
| release_version: "foo/bar", |
| cluster: "local", |
| release_tag: "", |
| environ: "default", |
| submission_user: "foo", |
| release_username: "foo", |
| submission_time: 1489523952, |
| viz: "", |
| role: "foo", |
| jobname: "EX" |
| } |
| """ |
| |
| def initialize(self, tracker): |
| """ initialize """ |
| self.tracker = tracker |
| |
| @tornado.gen.coroutine |
| def get(self): |
| """ get method """ |
| try: |
| cluster = self.get_argument_cluster() |
| role = self.get_argument_role() |
| environ = self.get_argument_environ() |
| topology_name = self.get_argument_topology() |
| topology_info = self.tracker.get_topology_info(topology_name, cluster, role, environ) |
| metadata = topology_info["metadata"] |
| self.write_success_response(metadata) |
| except Exception as e: |
| Log.error("Exception when handling GET request '/topologies/metadata'") |
| Log.debug(traceback.format_exc()) |
| self.write_error_response(e) |