#
# 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.
#
"""A object to control to the Job API Co-Process
"""
from __future__ import absolute_import
import logging
import subprocess
import time
from builtins import object
import grpc
from apache_beam.portability.api import beam_job_api_pb2_grpc
[docs]class DockerRPCManager(object):
"""A native co-process to start a contianer that speaks the JobApi
"""
def __init__(self, run_command=None):
# TODO(BEAM-2431): Change this to a docker container from a command.
self.process = subprocess.Popen(
['python',
'-m',
'apache_beam.runners.experimental.python_rpc_direct.server'])
self.channel = grpc.insecure_channel('localhost:50051')
self.service = beam_job_api_pb2_grpc.JobServiceStub(self.channel)
# Sleep for 2 seconds for process to start completely
# This is just for the co-process and would be removed
# once we migrate to docker.
time.sleep(2)
def __del__(self):
"""Terminate the co-process when the manager is GC'ed
"""
logging.info('Shutting the co-process')
self.process.terminate()