text: #
  # 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 runner for executing portable pipelines on Spark."""
  
  # pytype: skip-file
  
  from __future__ import absolute_import
  from __future__ import print_function
  
  import os
  import re
  import urllib
  
  from apache_beam.options import pipeline_options
  from apache_beam.runners.portability import job_server
  from apache_beam.runners.portability import portable_runner
  from apache_beam.runners.portability import spark_uber_jar_job_server
  
  # https://spark.apache.org/docs/latest/submitting-applications.html#master-urls
  LOCAL_MASTER_PATTERN = r'^local(\[.+\])?$'
  
  
  class SparkRunner(portable_runner.PortableRunner):
    def run_pipeline(self, pipeline, options):
      spark_options = options.view_as(pipeline_options.SparkRunnerOptions)
      portable_options = options.view_as(pipeline_options.PortableOptions)
      if (re.match(LOCAL_MASTER_PATTERN, spark_options.spark_master_url) and
          not portable_options.environment_type and
          not portable_options.output_executable_path):
        portable_options.environment_type = 'LOOPBACK'
      return super(SparkRunner, self).run_pipeline(pipeline, options)
  
    def default_job_server(self, options):
      spark_options = options.view_as(pipeline_options.SparkRunnerOptions)
      if spark_options.spark_submit_uber_jar:
        if not spark_options.spark_rest_url:
          raise ValueError('Option spark_rest_url must be set.')
        return spark_uber_jar_job_server.SparkUberJarJobServer(
            spark_options.spark_rest_url, options)
      return job_server.StopOnExitJobServer(SparkJarJobServer(options))
  
    def create_job_service_handle(self, job_service, options):
      return portable_runner.JobServiceHandle(
          job_service,
          options,
          retain_unknown_options=options.view_as(
              pipeline_options.SparkRunnerOptions).spark_submit_uber_jar)
  
  
  class SparkJarJobServer(job_server.JavaJarJobServer):
    def __init__(self, options):
      super(SparkJarJobServer, self).__init__(options)
      options = options.view_as(pipeline_options.SparkRunnerOptions)
      self._jar = options.spark_job_server_jar
      self._master_url = options.spark_master_url
  
    def path_to_jar(self):
      if self._jar:
        if not os.path.exists(self._jar):
          url = urllib.parse.urlparse(self._jar)
          if not url.scheme:
            raise ValueError(
                'Unable to parse jar URL "%s". If using a full URL, make sure '
                'the scheme is specified. If using a local file path, make sure '
                'the file exists; you may have to first build the job server '
                'using `./gradlew runners:spark:2:job-server:shadowJar`.' %
                self._jar)
        return self._jar
      else:
        return self.path_to_beam_jar(
            ':runners:spark:2:job-server:shadowJar',
            artifact_id='beam-runners-spark-job-server')
  
    def java_arguments(
        self, job_port, artifact_port, expansion_port, artifacts_dir):
      return [
          '--spark-master-url',
          self._master_url,
          '--artifacts-dir',
          artifacts_dir,
          '--job-port',
          job_port,
          '--artifact-port',
          artifact_port,
          '--expansion-port',
          expansion_port
      ]
  