blob: 820b51c6a0a94fcd2d89dca5407029aef74cbf04 [file] [log] [blame]
#!/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
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# 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.getTopologyInfo(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)