#
# Licensed 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.
from ceilometer.pipeline import sample as endpoint
from ceilometer import sample


class TelemetryIpc(endpoint.SampleEndpoint):
    """Handle sample from notification bus

     Telemetry samples polled by polling agent.
     """

    event_types = ['telemetry.polling']

    def build_sample(self, message):
        samples = message['payload']['samples']
        for sample_dict in samples:
            yield sample.Sample(
                name=sample_dict['counter_name'],
                type=sample_dict['counter_type'],
                unit=sample_dict['counter_unit'],
                volume=sample_dict['counter_volume'],
                user_id=sample_dict['user_id'],
                project_id=sample_dict['project_id'],
                resource_id=sample_dict['resource_id'],
                timestamp=sample_dict['timestamp'],
                resource_metadata=sample_dict['resource_metadata'],
                source=sample_dict['source'],
                id=sample_dict['message_id'],

                # Project name and username might not be set, depending on the
                # configuration `tenant_name_discovery`. Therefore, we cannot
                # assume that they exist in the sample dictionary.
                user_name=sample_dict.get('user_name'),
                project_name=sample_dict.get('project_name')
            )
