Source code for airflow.contrib.operators.emr_add_steps_operator

# -*- coding: utf-8 -*-
#
# 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 airflow.models import BaseOperator
from airflow.utils import apply_defaults
from airflow.exceptions import AirflowException
from airflow.contrib.hooks.emr_hook import EmrHook


[docs]class EmrAddStepsOperator(BaseOperator): """ An operator that adds steps to an existing EMR job_flow. :param job_flow_id: id of the JobFlow to add steps to :type job_flow_name: str :param aws_conn_id: aws connection to uses :type aws_conn_id: str :param steps: boto3 style steps to be added to the jobflow :type steps: list """ template_fields = ['job_flow_id'] template_ext = () ui_color = '#f9c915' @apply_defaults def __init__( self, job_flow_id, aws_conn_id='s3_default', steps=None, *args, **kwargs): super(EmrAddStepsOperator, self).__init__(*args, **kwargs) steps = steps or [] self.job_flow_id = job_flow_id self.aws_conn_id = aws_conn_id self.steps = steps def execute(self, context): emr = EmrHook(aws_conn_id=self.aws_conn_id).get_conn() self.log.info('Adding steps to %s', self.job_flow_id) response = emr.add_job_flow_steps(JobFlowId=self.job_flow_id, Steps=self.steps) if not response['ResponseMetadata']['HTTPStatusCode'] == 200: raise AirflowException('Adding steps failed: %s' % response) else: self.log.info('Steps %s added to JobFlow', response['StepIds']) return response['StepIds']