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+#!/usr/bin/env python
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+# -- coding: utf-8 --
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+# Licensed to Cloudera, Inc. under one
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+# or more contributor license agreements. See the NOTICE file
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+# distributed with this work for additional information
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+# regarding copyright ownership. Cloudera, Inc. licenses this file
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+# to you under the Apache License, Version 2.0 (the
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+# "License"); you may not use this file except in compliance
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+# with the License. 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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+
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+import logging
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+
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+from desktop.lib.rest.http_client import HttpClient, RestException
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+from desktop.lib.rest import resource
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+
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+from metadata.conf import NAVIGATOR
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+
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+
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+LOG = logging.getLogger(__name__)
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+
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+
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+class NavigatorApiException(Exception):
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+ pass
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+
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+
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+class NavigatorApi(object):
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+ """
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+ http://cloudera.github.io/navigator/apidocs/v2/index.html
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+ """
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+
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+ def __init__(self, api_url=None, user=None, password=None):
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+ self._api_url = (api_url or NAVIGATOR.API_URL.get()).strip('/')
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+ self._username = user or NAVIGATOR.AUTH_USERNAME.get()
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+ self._password = password or NAVIGATOR.AUTH_PASSWORD.get()
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+
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+ self._client = HttpClient(self._api_url, logger=LOG)
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+ self._client.set_basic_auth(self._username, self._password)
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+ self._root = resource.Resource(self._client)
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+
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+ self.__headers = {}
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+ self.__params = ()
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+
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+
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+ def find_entity(self, type, name):
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+ """
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+ GET /api/v2/interactive/entities?query=((originalName:<name>)AND(type:<type>))
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+ http://cloudera.github.io/navigator/apidocs/v2/path__v2_interactive_entities.html
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+ """
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+ try:
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+ params = self.__params
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+ filter_query = '((originalName:%(name)s)AND(type:%(type)s))' % {'name': name, 'type': type}
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+ params += (
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+ ('query', filter_query),
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+ ('offset', 0),
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+ )
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+
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+ response = self._root.get('interactive/entities', headers=self.__headers, params=params)
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+ if response['totalMatched'] == 0:
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+ raise NavigatorApiException('Could not find entity with type %s and name %s') % (type, name)
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+ elif response['totalMatched'] > 1:
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+ raise NavigatorApiException('Found more than 1 entity with type %s and name %s') % (type, name)
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+ else:
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+ return response['results'][0]
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+
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+ except RestException, e:
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+ raise NavigatorApiException('Failed to find entity with type %s and name %s: %s' % (type, name, str(e)))
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